Nuclear Grade HEPA Filters Nuclear Grade HEPA

Nuclear Grade
HEPA Filters
PB-2016-0907
Nuclear Grade HEPA Filters
Square, Rectangular, Round and Nipple-Connected
Filters Constructed and Tested in Accordance with
•
•
•
•
ASME AG-1
IEST-RP-CC001.4 Type B
MIL-STD-282
DOE-STD-3020-2005
Flanders Filters, Inc.
A Wholly Owned Subsidiary of Flanders Corporation
Quality Assurance Program
Quality Assurance
Any industry with dangerous process or exhaust
gases and/or particulates has a vital concern
for the health and safety of personnel. In addition to corporate concern, the United States
Government has dictated that safety equipment
meets minimum safety standards. Any equipment
sold to meet these minimum standards must be
manufactured using accepted Quality Control
procedures.
Flanders has developed a Quality Assurance
program to assure the product or service meets
these standards. This program addresses the entire range of Flanders involvement, including the
purchase of raw materials, the shortage of these
raw materials, incorporation of these materials
into a product or service, testing this product or
service, then, shipping to its destination.
The Flanders Program has been audited many
times, and each time the program has been accepted. An uncontrolled copy of the program
manual is available with each request for Quality
Assurance information. Like any dynamic document, the manual is continually being revised to
include recent issues of standards and specifications in order that Flanders may use the latest
state-of-the-art methods in providing its products
and services.
The Quality Assurance Program at Flanders Filters
has been audited and approved numerous times
by the Nuclear Utilities Procurement and Inspection Committee, NUPIC. This committee was
established by nuclear electric utilities to ensure
that suppliers of goods and services meet all applicable regulatory and quality requirements.
Notes:
1.As part of our continuing program to improve
the design and quality of all our products, we
reserve the right to make such changes without
notice or obligation.
2.Flanders, through its limited warranty, guarantees the products described herein will meet all
specifications agreed to by the buyer and the
seller.
3.ASME N509 Nuclear Power Plant Air Cleaning
Units and Components.
4.ASME N510 Testing of Nuclear Air Treatment
Systems.
5.ASME AG-1 Code on Nuclear Air and Gas
Treatment
© COPYRIGHT 2007 By
Flanders/FFI Corporation
531 Flanders FIlters Road • Washington, NC 27889
Nuclear Grade HEPA Filters
NOTICE . . . Compliance with installation and operation
standards must be met to ensure quality performance.
Test results appear on both the filter label
and the filter carton label. An additional
quality assurance test report is kept on
file and is available on request.
Flanders Filters, Inc. (FFI) recommends
that all HEPA filters be tested in place by
qualified personnel to ensure that the filters have been correctly installed in the
containment housing.
Flanders/FFI service personnel are available for installations, supervision of installation, testing and certification of
compliance to industry and government
standards and instruction of the owner’s
personnel in testing and maintenance
procedures.
Flanders/FFI does not guarantee that
its equipment will operate at the performance levels given on the identfication labels or in the catalog specfications under all conditions of installation
and use, nor does Flanders/FFI guarantee the suitability of its product for
the particular end use which may be
contemplated by the buyer.
For best results, it is recommended
that the buyer supply complete information about the operating conditions
of the ventilation system to Flanders/
FFI for evaluation.
When the system components are
supplied to the buyer or his agent for
final installation and assembly in the
field, it should be under the supervision of factory trained personnel.
Failure to adhere to this recommendation or failure of the buyer to have filters timely retested and serviced will
nullify or limit any warranties which
might otherwise apply and may result
in a compromised installation.
IMPORTANT MESSAGE
HEPA filters are factory tested to meet the
requirements of IEST-RP-CC001.4 filters
Nuclear Grade HEPA Filters - Table of Contents
Quality Assurance.......................................................................................... Inside Front Cover
Important Message....................................................................................................................3
General Information...................................................................................................................6
Comprehensive Factory Testing.......................................................................................6
Retesting by DOE Filter Test Facility ...............................................................................7
Design Qualification Tests ..............................................................................................7
Seismic Qualification . .....................................................................................................7
Testing Service Available ................................................................................................8
Filter Design and Construction ................................................................................................8
Filter Medium ..................................................................................................................8
Two Types of Filter Pack Designs . .................................................................................8
Sealants/Adhesive . .........................................................................................................9
Case Material ..................................................................................................................9
Case Styles .....................................................................................................................9
Faceguards .....................................................................................................................9
Filter Selection . .......................................................................................................................10
Underwriters Laboratory UL 586 . .................................................................................10
Filter Selection ..............................................................................................................10
Standard Sizes and Capacities Separatorless® Filters ................................................ 11
Standard Separatorless® Filters ............................................................................ 11
Chart: Gel Seal Filters ................................................................................................... 11
Chart: Gasket Seal Filters ............................................................................................. 11
Separatorless® Media Packs ..........................................................................................12
Standard Sizes and Capacities .....................................................................................12
Diagram: Dimension .....................................................................................................12
Chart: 11-inch Separatorless® Filter Element . ......................................................12
Chart: 4-inch Separatorless® Filter Element . ........................................................12
Standard Sizes and Capacities Separator-Type Filters . ....................................................13
Chart: Gel Seal Filters ...................................................................................................13
Chart: Gasket Seal Filters .............................................................................................13
Chart: 11-inch Separator-Type Filter Element ..............................................................14
Chart: 5 1/2-inch Separator-Type Filter Element ..........................................................14
Chart: 2 3/4-inch Separator-Type Filter Element ..........................................................14
High Temperature Sealant . ....................................................................................................15
Separator-Type Filters ..................................................................................................16
Supply or Exhaust Air 500ºF Gasket Seal or 390ºF Gel Seal .......................................16
Chart: Separator-Type Filters Gel Seal and Gasket Seal .............................................16
Exhaust Air Only 1000ºF................................................................................................16
Chart: Separator-Type Filters Gasket Seal Only . .........................................................16
Nuclear Grade HEPA Filters - Table of Contents
Round Filters ...........................................................................................................................17
Diagram: Flanges ......................................................................................................... 17
Chart: Separatorless® Filters, Standard Sizes . ..................................................... 17
Chart: Separator-Type Filters . ...................................................................................... 17
Gel Seal .........................................................................................................................18
Gasket Seal ...................................................................................................................18
Lifting Bails . ..................................................................................................................18
Faceguards ...................................................................................................................18
Drilled Flanges . .............................................................................................................18
UL 586............................................................................................................................18
Model Numbers and Specifications ..............................................................................18
Nipple-Connected Filters . ......................................................................................................19
Chart: N1 or N2 Filters with Separatorless® Filter Elements, Standard Sizes . .....19
Chart: N1 or N2 Filters with Separator-Type Filter Elements, Standard Sizes .............19
Design Features and Options . ...............................................................................................20
Roughing Prefilter .........................................................................................................20
Diagram: Prefilter ..........................................................................................................20
Gasket Seal (N1 Filters Only) ........................................................................................20
Diagram: Wood Case or Metal Case ............................................................................20
Drilled Flanges . .............................................................................................................20
Diagram: Nipple-Connected Flange .............................................................................20
Diagram: Filter Face Flange ..........................................................................................20
Slip-On Flanges . ...........................................................................................................20
Faceguards ...................................................................................................................20
UL 586 (N1 and N2 Filters) ............................................................................................20
Model Numbers and Specifications ..............................................................................20
Model Number Designating Development ............................................................................21
Filter Model Number .....................................................................................................21
To Order ........................................................................................................................21
Nuclear Filter Size Designators .....................................................................................21
Chart: Standard Size Designator ..................................................................................21
Model Number Designating Chart ........................................................................................22
Suggested Specifications . .....................................................................................................23
Environmental Condition ........................................................................................................24
Packaging and Palletizing .............................................................................................24
Diagram: Vertical Pleats.................................................................................................24
Receipt, Storage, Shelf Life . ..................................................................................................25
Shelf Life Information ....................................................................................................25
BLU-JEL® Seal Data ................................................................................................................26
Nuclear Grade HEPA Filters: General Information
Quality Assurance
The Quality Assurance Program of Flanders Filters,
Inc. (FFI) meets or exceeds the basic requirements
of ASME NQA-1 and 10CFR50 APPENDIX B.
Comprehensive Factory Testing
Nuclear Grade HEPA Filters meet the requirements for performance, testing and construction
specified in Section 4.2.2 of IEST-RP-CC001.4
for Type B HEPA filters. This section describes
performance levels and states, “A filter that has
been tested for overall penetration at rated flow
and at 20% of rated flow, in accordance with
Section 9.1.1 (Mil Std-282). The minimum filter
efficiency of encapsulated filter in this type is
99.97% on 0.3µm particles.Every FFI Nuclear
Grade HEPA filter is factory tested for penetration
and resistance to airflow at 100% of its rated air
flow prior to shipment. These values are recorded
on a barcoded serialized label that is applied to
each filter. Additionally, filters rated at 75 cfm and
greater are factory tested for penetration at 20% of
rated airflow. (This test is commonly known as the
two-flow test.) The maximum penetration allowed
at either flow is 0.03%. In recent years, HEPA filter
designs exceeding the original test methods for
flow capacities have been developed. Therefore,
Flanders uses one of two test methods to ensure
the performance of Nuclear Grade Filters. They
are described as follows:
The test method historically specified and use
by Flanders for most Nuclear Grade filters is
Mil-Std-282 (method 102.9.1). In this test an
approved aerosol is used to generate a nearly
monodisperse aerosol of approximately 0.3 micrometer diameter droplets. The penetration of
the aerosol through the filter is measured with
forward light scattering photometer. The measuring instrument specified by Mil-Std 282 is a
Q-107 penetrometer. It was originally developed
by the U.S. Army prior to 1950. The measuring
instrument is limited by design to testing at flows
ranging from 15 cfm to 1100 cfm. Flanders uses
this instrument for all Nuclear Grade filters with
rated air flows ranging from 15 cfm to 1100 cfm.
For filters rated below 75 cfm, the 20% flow test
cannot be performed accurately.
FFI Nuclear Grade Filters are produced in square,
rectangular, and nipple-connected designs.
Nuclear Grade HEPA Filters: General Information
HFATS Test
Los Alamos National Laboratory developed an
alternate test method in the 1980’s under contract to the U.S. Department of Energy (DOE).
It is often referred to as the HFATS test (High
Flow Alternative Test System). It was developed
specifically to test filters rated at airflows higher than 1100 CFM, but it can be used for lower
flows. It is only limited by the size of the system
fan and the aerosol generator output. This method was later standardized in the publication of a
recommended practice, IEST-RP-CC007.1, Testing ULPA Filters, published by the Institute of
Environmental Sciences and Technology. Currently, ASME AG-1 Section FC allows for testing
by this method. The filter is challenged with an
acceptable polydispersed oil aerosol and the
penetration through the filter is measured with
a Laser Particle Counter. The Particle Counter
counts and sizes individual droplets in a size
range from 0.1 to 3.0 micrometers in diameter.
The ratio of the downstream counts to the upstream counts in each size range is the penetration. Although this value is not equal to the
penetration measured by the Q-107, research
performed by Los Alamos National Laboratory
verified it to be very similar and the method to
be an acceptable alternative to the penetration
measured by Mil-Std-282 Test Method.
Since this system measures the penetration in
each size range, and a HEPA filter penetration
varies with particle size, the maximum allowable
penetration is 0.03% for the most penetrating
particle size (MPPS). Flanders Filters Inc. can
use this system to test filters that are rated at
flows higher than 1100 CFM, if specified by the
customer.
Retesting by DOE Filter Test Facilities
DOE requires that nuclear facilities operated by
DOE contractors have their HEPA filters retested
at a Filter Test Facility operated for DOE. This
service must be arranged by the buyer. Filters
rejected at the test station as not conforming to
the purchase specifications and determined not
to have been damaged in shipment, will be replaced at no cost to the buyer. Filters must be
shipped directly from the factory to the retest
facility. If filters must be shipped to the retest
facility, the requirement must be specified when
quotations are requested. Filters requiring test
will be quoted and sold to end user only. Upon
successfully passing the testing at the retest facility, filters become the property of the end user
or buyer. The end-user or buyer must arrange
for their transport from the retest facility to the
end-user’s site.
Design Qualification Tests
Design qualification testing is a key element of
Nuclear Grade filters. Since there is a wide variety of filter types, sizes, and construction materials, purchasers shall clearly state required
design qualification tests within their solicitations.These tests may include, but are not limited to those specified in ASME AG-1 Section
FC-5100. Section FC tests are defined only for
filter sizes specified in Table FC-4110 and may
not be applicable for round and nippleconnected filter designs. AG-1 requires design qualification test to be performed by an independent
laboratory within 5 years prior to shipment.
Flanders has several models which meet these
requirements; please consult the factory for the
latest list of models which do. In addition, Flanders has the capability to perform several of
the FC-5100 qualification tests, in-house, under
the Flanders quality assurance program. These
tests may be helpful to the purchaser for qualifying designs which do not meet the full requirements of ASME AG-1. Please consult the factory
for assistance in this matter.
Seismic Qualification
ASME AG-1 requires filters to be seismically
qualified per the purchaser specified loadings.
FFI has qualified various filter models per ASME
AG-1 Section FC - 4300. The test qualification
Nuclear Grade HEPA Filters: Design and Construction
was performed as follows: A HEPA filter was installed in a Flanders/CSC bag-in bag-out containment housing and subjected to simulated
earthquake loading. No failure or damage was
observed during or subsequent to the simulated
event. The load exceeded the current requirements for UBC Zone 4 loading.
Testing Service Available
Flanders service personnel are available for installation, supervision of installation, filter testing
and certification of compliance to industry and
government standards, and instruction of the
owner’s personnel in testing and maintenance
procedures. Contact the factory for details.
Filter Design and Construction
Filter Medium
The filter medium in FFI’s Nuclear Grade filter elements is glass (boron silicate microfiber)
and contains a waterproofing binder which adds
strength under both wet and dry conditions. FFI
manufactures its own filter media to meet or exceed the requirements of ASME AG-1 Section
FC, Mandatory Appendix FC-I. Approved media,
formulated for resistance to airborne acids, are
also available; consult the factory.
Flanders Filters manufactures its own filter media, enabling us to develop a unique manufacturing process for the production of Separatorless® HEPA Filters. In one manufacturing
operation, Flanders Filters Inc. produces a selfsupporting and self-separating Media Pack. The
Separatorless® Filter offers many advantages over conventional separator-style HEPA
Filters:
• More usable media area for longer service
life and higher dust-holding capacity
• Reduced cost of ownership due to longer
service life
• Maximum utilization of the media
• 11 inches deep Separatorless® Pack
has approximately 400 sq. ft. of media as
compared to 240 sq. ft. for a conventional
separator-style filter.
• Can handle some harsh environments
which may attack aluminum separators
• Media pack can be incinerated
• Media is thicker than conventional media
used in separator-style HEPA Filters
Two Types of Filter Pack Designs
Flanders Filters Inc. manufacturers Separatorless® HEPA Filters and conventional Separator-Style Filters. In a separator-style pack, the
filter media is folded over corrugated aluminum
separators with hemmed edges to separate the
pleats of the filter pack.
HEPA Filters Separatorless® HEPA filter with a
formed, self-supporting pack
Conventional Separator-style HEPA filter with
aluminum separators
Nuclear Grade HEPA Filters: Design and Construction
Sealants/Adhesive
Fire-retardant solid urethane is used to bond the
filter element to its integral case. Maximum temperature rating for this sealant is 250°F.
Gel Seal — Metal case gel seal filters have a fabricated channel ( 3/4” wide x 3/4” deep) located on
one face. Wood case filters have a routed channel
( 3/8” wide x 3/4” deep) on one face.
Case Material
BLU-JEL® Seal was developed by Flanders and
is the standard gel seal material.
Plywood 3/4 - inch fire-retardant plywood cases are
ideal for many applications, and are easier to incinerate or breakdown for disposal than are metal
case filters. However, they are not recommended
for use in systems having high moisture content
or high temperature: they may warp or support
biological growth. Stainless steel case materials
should be used in moisture-laden applications.
Stainless Steel - 14-gauge Type 409 and 14-gauge
Type 304 stainless steel cases are available. The
Type 409 stainless steel replaced cadmium-plated
and chromized steel. However, Type 409 material
has a low resistance to caustic atmospheres. Type
304 stainless steel is recommended for those applications.
Case Style
Gasket Seal — Metal case gasketed filters are provided with flanges for the placement of the gasket
as specified by the customer. On wooden cases,
the gasket is applied to the face of the case.
Gasketed filters for normal service are supplied
with closed cell sponge neoprene (1/4” x 3/4”).
High-temperature filters require the special sealants described on page 15. Specify upstream,
downstream, or both for the location of the gasket
or gel seal within the model number.
Faceguards
The standard faceguard materials are 23-gauge
4 x 4 mesh, welded galvanized dipped steel or
18-gauge Type 304 stainless steel. Faceguards
protect the media, but are not a guarantee against
damage caused by mishandling.
The technique used for sealing the filter in service
determines the selection of the filter case style.
(See illustrations.)
Note: Specify faceguard location as upstream, downstream or both.
The Gel Seal
The Gasket Seal
A knife edge in the filter housing mates into a gel
filled channel provided on the filter. Flanders invented the fluid seal in response to requirements
for an absolute seal in the most critical applications.
In most cases, gel seal filters are also easier and
quicker to change out than gasketed filters.
Filter
Gel Seal
Channel
Filter
Gasket
Seal
Knife Edge
BLUE-JEL® Seal
A filter clamping mechanism is typically used to
maintain sealing pressure on gasketed filters.
Gasket seals have a tendency to develop bypass
leaks, primarily because of compression set.
Nuclear Grade HEPA Filters: Filter Selection
Underwriters Laboratory, UL 586
To be UL 586 classified, filters must be submitted to Underwriters Laboratories for extensive
testing including spot flame, and environmental
exposure to heated air. A UL 586 classification is
accepted by the DOE as meeting the Heated Air
and Spot Flame Test requirements in ASME AG-1
for Nuclear Grade filters.
UL labels are optional. Some high-temperature
filters, and filters larger than 24” x 30” x 111 /2” ,
are not eligible for UL 586.
Filter Selection
1. Standard Separatorless® maximum height
is 24-inches. When specifying a filter size,
the first dimension is always the height of the
filter (the dimension parallel to the pleat of the
medium); the second dimension is always the
width of the filter; and, the third dimension is
the filter depth.
2. The filter sizes in Table FC-4110 do not include
all sizes offered by manufacturers or requested
by users today. The table is limited to nine (9)
sizes, perceived by the American Society of
Mechanical Engineers (ASME) to be standard.
For special sizes, not addressed by the table,
contact the factory.
3. Of the sizes appearing in Table FC-4110, the
GG-F (24” x 24” x 111/2”) and GG-D (24” x 24”
x 5 7/8 ”) are the largest. Capacities for other
sizes are computed from one of these two,
depending on the filter element depth of the
unlisted filter and its effective face area relative
to the listed size. (The face area is obtained
by subtracting two inches from the height and
width dimensions to allow for the thickness of
the case and the pack-to-case sealant.)
4. 11 1/2” deep filters are generally selected for
service where a minimum amount of space
relative to a maximum amount of airflow is
required. Most often this is required in builtup banks, walk-in plenums, or side-access
housings. Flanders’ GG-F size filter is most
frequently selected.
10
5. If filters are operated at higher flows, efficiency
can decrease and resistance will increase.
Care should be taken if the customer is planning to operate a filter at higher than the rated
capacity to determine if hostile environmental
factors, such as combined high operating flow
rate, water vapor condensation, and/or acid
vapors, will cause filter failure. For example,
water condensate on the filter media could
plug the element, causing failure.
A Z-drawing will be developed and become the
size designator, in the model number for any filter
which has special construction or testing requirements which are not covered in the Style Code
System. Example: Z07123
Important Note:
GG-F filters with Separatorless® media packs
are sold as Size 5, 6 or 7. Unless customer specifies to the contrary, the filter is tested and sold as
Size 5 (1000 cfm @ 1.0” w.g. maximum).
“T”-clip on alignment mechanism
(T-clips are factory installed.)
Nuclear Grade HEPA Filters: Filter Selection
Standard Separatorless® Filters
Insert the desired Filter Size Designator from
the charts on page 12 at the end of the model
number.
( Example: T-007-W-43-05-NU-51-23-GG-FU5)
Gel Seal Filters
Typical model numbers specifying filters with
galvanized or stainless steel faceguards on both
faces and with either BLU-JEL® Seal or a neoprene gasket located on the upstream face are
addressed below.
Gasket Seal Filters
Gel Seal Filters Size, Material and Model Number
Media Pack Depth
(inches)
4
11
11
Case Filter Material
Model Number
(typical)
Type 409 S/S
Type 304 S/S
3
/4” Fire-Retardant Plywood
T-007-D-42-05-NU-51-13-_ _-DU5
T-007-D-43-05-NU-51-23-_ _-DU5
T-007-D-04-05-NU-51-13-_ _-DU5
Type 409 S/S
Type 304 S/S
3
/4” Fire-Retardant Plywood
Type 409 S/S
Type 304 S/S
3
/4” Fire-Retardant Plywood
T-007-W-42-05-NU-51-13-_ _-FU5
T-007-W-43-05-NU-51-23-_ _-FU5
T-007-W-04-05-NU-51-13-_ _-FU5
T-007-U-42-05-NU-51-13-_ _-FU5
T-007-U-43-05-NU-51-23-_ _-FU5
T-007-U-04-05-NU-51-00-_ _-FU5
Note: “T” prefix in model number indicates T-clip requirement for gel seal-type filters used in sideaccess housings. (See gel seal photo on page 10.)
Gasket Seal Filters Size, Material and Model Number
Media Pack Depth
(inches)
5 /2
1
11
11
Case Filter Material
Model Number
(typical)
Type 409 S/S
Type 304 S/S
3
/4” Fire-Retardant Plywood
0-007-D-42-03-NU-11-13-_ _-DU5
0-007-D-43-03-NU-11-23-_ _-DU5
0-007-D-04-00-NU-11-13-_ _-DU5
Type 409 S/S
Type 304 S/S
3
/4” Fire-Retardant Plywood
Type 409 S/S
Type 304 S/S
3
/4” Fire-Retardant Plywood
0-007-W-42-03-NU-11-13-_ _-FU5
0-007-W-43-03-NU-11-23-_ _-FU5
0-007-W-04-00-NU-11-13-_ _-FU5
U-007-U-42-05-NU-51-13-_ _-FU5
U-007-U-43-05-NU-51-23-_ _-FU5
U-007-U-04-05-NU-51-00-_ _-FU5/
11
Nuclear Grade HEPA Filters: SEPARATORLESS® Filter Selection
Standard Sizes and Capacities
Pack
Dept
Flanders manufactures standard square and
rectangular Nuclear Grade filters in a variety of
sizes and capacities. (Sizes and capacities for
Round and Nipple connected filters are listed
in their respective sections in this bulletin.) The
type (Separatorless® or Separator-Type) and
depth of the filter element is a primary factor in
filter capacity.
H
NOTE: The maximum allowable resistance at
the Nominal Rated Capacity is 1.0-inch w.g. (or
1.3-inch w.g. for certain sizes listed in ASME
AG-1, Section FC, Table FC-4110).
D
W
Separatorless® Filter Sizes and Capacities
Separatorless® Filter Sizes and Capacities
Filter Size
(designator)
CC-F
CC-F
CG-F
GC-F
GE-F
GG-F
GG-F
GG-F
GN-F
Filter Size
(designator)
12
BB-D
CC-D
GE-D
GG-D
GN-D
Dimensions
H
W
12
12
12
24
24
24
24
24
24
(inches)
12
12
24
12
18
24
24
24
30
D
11 /2
111/2
111/2
111/2
111/2
111/2
111/2
111/2
111/2
1
Capacities
(cfm)
Maximum Initial
Resistance
(inches w.g.)
200
250
455
455
725
1000
1250
1500
1275
1.0
1.3
1.0
1.0
1.0
1.0
1.3
1.3
1.0
4-inch Separatorless® Filter Element
Dimensions
H
W
8
12
24
24
24
(inches)
8
12
18
24
30
D
57/8
57/8
57/8
57/8
57/8
Capacities
(cfm)
50
125
375
500
625
Maximum Initial
Resistance
(inches w.g.)
1.3
1.3
1.0
1.0
1.0
Nuclear Grade HEPA Filters: Separator Filter Selection
Standard Separator-Type Filters
Insert the desired Filter Size Designator from the
charts on page 12 at the end of the model number.
(The Size Designator indicates whether a 5 1/2- inch
or 11-inch filter element is being ordered.) Typical
model numbers specifying filters with galvanized
or stainless steel faceguards on both faces and
BLU-JEL® Seal or a neoprene gasket located on
the upstream face are addressed below.
Gel Seal Filters
Gasket Seal Filters
Gel Seal Filters Size, Material and Model Number
Media Pack Depth
(inches)
5 1/2
11
Case Filter Material
Type 409 S/S
Type 304 S/S
3
/4” Fire-Retardant Plywood
Type 409 S/S
Type 304 S/S
3
/4” Fire-Retardant Plywood
Model Number
(typical)
T-007-C-42-05-NU-51-13 -_ _- DU5
T-007-C-43-05-NU-51-23 -_ _- DU5
T-007-C-04-05-NU-51-13 -_ _- DU5
T-007-C-42-05-NU-51-13 -_ _- FU5
T-007-C-43-05-NU-51-23 -_ _- FU5
T-007-C-04-05-NU-51-13 -_ _- FU5
Note: “T” prefix in model number indicates T-clip requirement for gel seal-type filters used in
side-access housings. (See gel seal photo on page 10)
Gasket Seal Filters Size, Material and Model Number
Media Pack Depth
(inches)
5 1/2
11
Case Filter Material
Type 409 S/S
Type 304 S/S
3
/4” Fire-Retardant Plywood
Type 409 S/S
Type 304 S/S
3
/4” Fire-Retardant Plywood
Model Number
(typical)
0-007-C-42-03-NU-11-13 -_ _- DU5
0-007-C-43-03-NU-11-23 -_ _- DU5
0-007-C-04-00-NU-11-13 -_ _- DU5
0-007-C-42-03-NU-11-13 -_ _- FU5
0-007-C-43-03-NU-11-23 -_ _- FU5
0-007-C-04-00-NU-11-13 -_ _- FU5
13
Nuclear Grade HEPA Filters: Standard Separator-Type Filter Selection
Standard Separator-Type Filter Sizes and Capacities
11-inch Separator-Type Filter Element
H
Dimensions
W
12
12
12
24
24
24
24
24
24
12
12
24
12
18
24
24
24
30
Filter Size
(designator)
CC-F
CC-F
CG-F
GC-F
GE-F
GG-F
GG-F
GG-F
GN-F
Capacities
D
(inches)
11 /2
111/2
111/2
111/2
111/2
111/2
111/2
111/2
111/2
1
(cfm)
Maximum Initial
Resistance
(inches w.g.)
200
250
455
455
725
1000
1250
1500
1275
1.0
1.3
1.0
1.0
1.0
1.0
1.3
1.3
1.0
51/2 -inch Separator-Type Filter Element
Filter Size
(designator)
BB-D
CC-D
GE-D
GG-D
GN-D
H
Dimensions
W
Capacities
D
(cfm)
8
12
24
24
24
8
12
18
24
30
5 /8
57/8
57/8
57/8
57/8
50
125
375
500
625
(inches)
7
Maximum Initial
Resistance
(inches w.g.)
1.3
1.3
1.0
1.0
1.0
2 3/4-inch Separator-Type Filter Element
Filter Size
(designator)
Dimensions
H
W
(inches)
14
BB-A
8
8
Capacities
D
(cfm)
3 /16
25
1
Maximum Initial
Resistance
(inches w.g.)
1.3
Nuclear Grade HEPA Filters: High-Temperture
Standard High-Temperature Filters
Flanders manufactures HEPA filters for
applications with high temperature requirements up to 1000°F (540°C) for exhaust air only and 500°F (260°C) for supply air. They do not meet all the qualification
requirements of ASME-AG1 Section FC. Hightemperature filters are available with gasket
or gel seal. (Filters with BLU-JEL® Seal have
a maximum service temperature of 392°F.)
Gasketed filters for high temperature service are supplied with silicone sponge gaskets ( 1/4 inch thick x 3/4 inch wide). High Temperature Nuclear Grade HEPA Filters meet the
requirements of IEST-RP-CC001.4 for Type B
Filters and are tested in accordance with MILStd-282. Two types of high temperature HEPA
filters are offered. The choice should be carefully made in accordance with the proposed
filter service requirements for the specific
application.
Silicone Sealant (Designator NE)
This is a high-temperature room-temperature vulcanizing (RTV) silastic-sealant silicone
compound rated for continuous service up to
500°F/260°C (supply air).
NOTE: This high-temperature sealant is UL 586
classified; however, it does not meet all the qualification requirements of ASME-AG1 Section FC.
“NE” filters are eligible for UL586 labels.
Glass Pack Sealant (Designator NG)
The glass pack seal is rated for continuous
service up to 1000°F/540°C in exhaust air applications only and with separator-type filter
elements only. A mat of submicron glass fibers
creates a seal when compressed between the
filter pack and filter case. The glass packing is
not an adhesive seal but a mechanical seal that
functions much as the glass fiber medium of the
filter itself.
Additional angle stiffeners are added to prevent
the filter pack from slipping at high pressure
drops.
NOTE: Labels are not attached to 1000°F high
temperature filters.
NOTE: Due to the possibility of the glass pack
seals shedding glass fibers, the glass pack sealant
should be used for exhaust systems only.
NOTES: _____________________________________
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15
Nuclear Grade HEPA Filters: High Temperature
Supply or Exhaust Air
500° F Maximum (Gasket Seal) or 390°F
Maximum (Gel Seal)
Insert the desired Filter Size Designator from the
chart on page 14 at the end of the model number. Typical model numbers specifying filters with
galvanized or stainless steel faceguards on both
faces and with BLU-JEL® Seal (for gel seal filters)
or silicone sponge (for gasket seal filters) located
on the upstream face are addressed below.
Separator-Type Filters, Case Material and Model Number
Media Pack
Depth
(inches)
Model Number
Gel Seal
Case Filter
Material
Model Number
Gasket Seal
(Max. 390° F, 200° C)
(Max. 500° F, 260° C)
5 1/2
Type 409 S/S
Type 304 S/S
T-007-C-42-05-NE-51-13-_ _-DU5
T-007-C-43-05-NE-51-23-_ _-DU5
0-007-C-42-03-NE-31-13-_ _-D
0-007-C-43-03-NE-31-23-_ _-D
11
Type 409 S/S
Type 304 S/S
T-007-C-42-05-NE-51-13-_ _-FU5
T-007-C-43-05-NE-51-23-_ _-FU5
0-007-C-42-03-NE-31-13-_ _-F
0-007-C-43-03-NE-31-23-_ _-F
Note: “T” prefix in model number indicates T-clip requirement for gel seal-type filters used in
side-access housings. (See gel seal photo on page 10)
Exhaust Air Only - 1000° F Maximum
Insert the desired Filter Size Designator, from the charts on page 14, at the end of the model number.
Model numbers specifying filters with stainless steel faceguards on both faces are addressed below.
Note: Not available in gel seal.
Separator-Type Filters Only
Media Pack
Case Filter
Depth
Material
(inches)
Model Number
Gasket Seal
(Max. 390° F, 200° C)
5 1/2
Type 409 S/S 0-007-C-42-03-NG-00-23-_ _-D
Type 304 S/S 0-007-C-43-03-NG-00-23-_ _-D
11
Type 409 S/S 0-007-C-42-03-NG-00-23-_ _-F
Type 304 S/S 0-007-C-43-03-NG-00-23-_ _-F
NOTE: These filters are shipped without gaskets, since none of
the standard gasket materials are rated for 1000°F service. However, two woven glass gaskets may be provided with the filter if
requested. The gaskets are shipped unattached and must be installed with the filter. Filter Labels are also shipped unattached.
16
Nuclear Grade HEPA Filters: Round Filters
Round Filters
Standard flange placement for a single flange
rolled filter is upstream. Contact factory for alternate placement.
Round Nuclear Grade HEPA filters are available
with Flanders’ Separatorless® filter element
and with separator-type elements. Cases are
made of 14 gauge Type 304 or Type 409 stainless
steel, and are available for both gasket or fluid seal
applications. Round filters are also manufactured
for high temperature applications. (See page 15
for information on high-temperature sealants.)
Round Nuclear Grade HEPA filter components are
materials specified in ASME AG-1 but the filters
are not tested for rough handling, wet over pressure, or heated air or spot flame as required by
that specification. Flanders performs acceptance
testing of penetration and resistance only.
RO
(No
Flange)
Airflow
X
R2
(Double
Flange)
X
Y
Z
R1
(Single
Flange)
X
Z
Airflow
Y
Airflow
R5
(Gel
Seal)
X
Y
Airflow
X
Separatorless® Filters Standard Sizes (contact factory for special sizes)
Filter Size
(designator)
Filter Element
Depth
Nominal Rated
Capacities
Maximum Initial
Resistance
4
4
35
100
1.0
1.0
Z
Filter Element
Depth
Nominal Rated
Capacities
Maximum Initial
Resistance
5 1/4 8
8
3 1/16 5 1/2
5 1/2
20
35
100
Dimensions
X
Y
Z
(inches)
B
C
6 /8 10 5/8 5
8
12
8
8
(inches)
(cfm)
(inches w.g.)
Separator-Type Filters
Filter Size
(designator)
A
B
C
Dimensions
X
6 5/8 6 5/8 10 5/8 Y
(inches)
8
8
12
(inches)
(cfm)
(inches w.g.)
1.0
1.0
1.0
17
Nuclear Grade HEPA Filters: Round Filters
Gel Seal
Faceguards
Gel Seal filters are supplied with a 5/8 -inch
x 11/16 -inch deep channel on one face only. The
channel is factory-filled with Flanders’ BLU-JEL®
sealant.
The standard faceguard materials are 23-gauge 4 x 4
inch mesh, welded galvanized
dipped steel or 18-gauge Type
304 stainless steel. Faceguards
protect the media, but are not a guarantee against
damage caused by mishandling.
Note: Specify faceguard location as upstream,
downstream or both.
Note: Designate R5 Case Style. Standard channel
location is upstream. (Face of flange)
Drilled Flanges
Channel
Gasket Seal
Gaskets are made from 1/4-inch x 3/4 -inch closed
cell neoprene material. Gaskets may be located
on either side of the upstream flange. Contact
factory for downstream flange location.
Note: Designate R1 (one flange) or R2 (2 flanges)
Case Style and specify location of the gasket as
face of flange, back of flange, face and back of
flange or faces of both flanges in the model number. Detail any special placement requirements.
Gasket Location
Face of Flange
Back of Flange
Lifting Bails
Optional lifting bails are available for easy filterremoval in special applications.
Note: Specify the “B” prefix in the filter modelnumber.
18
Drilled flanges are available as an option. Flanders’ standard pattern is
eight (8) 5/16-inch diameter holes equally spaced
and centered on a 7 3/8 -inch diameter bolt circle
for sizes A and B, or a 11 5/16 -diameter bolt circle
for size C filters.
Note: Use the ‘D’ prefix in the model number.
UL 586
For UL 586 classifiication, filters must be submitted
to Underwriters Laboratories for extensive testing
including spot flame and exposure to heated air.
A UL 586 classification listing is accepted by
DOE for meeting the Heated Air and Spot Flame
Test Requirement of Nuclear Grade HEPA filters.
NOTE: UL labels are optional and are applied only
if specified by the buyer.
Model Numbers and Specification
Note: To write a specification for Round Filters, use
the Designating Charts on pages 21 and 22 for determining the model number. Fill in the numbered
locations in the Suggested Specification Text on
page 23 with the model number and other appropriate selections from the listing on page 17.
Nuclear Grade HEPA Filters: Nipple Connected Filters
Nipple Connected Filters
sure, or heated air or spot flange as required by
that specification. Flanders performs acceptance
testing for penetration and resistance prior to attachment of cover plates.
Nipple Connected Nuclear Grade HEPA filters are
available with one (N1) or two (N2) nipple connections, and with Separatorless® or separatortype filter elements. Case materials are 14-gauge
Type 304 and 14-gauge Type 409 stainless steel
and 3/4 - inch fire retardant plywood. High temperature models are also available. (See page 15 for
information on sealants.) Nipple-Connected filters
are made of materials specified in ASME AG-1 but
are not tested for rough handling, wet over pres-
N2 Filters
N1 Filters
Typical Metal Case Filter Illustrated
X
Typical Wood Case Filter Illustrated
Z
X
Air Flow
Air Flow
H
H
Y
Filter
Pack
Y
Filter
Pack
D
W
Z
D
W
N1 or N2 Filters with Separatorless® Filter Elements, Standard Sizes
Filter Size
(designator)
BB-D
CC-D
CC-F
CC-F
GG-D
GG-F
GG-F
GG-F
N1 Filters
W
D
H
(inches)
8
12
12
12
24
24
24
24
8
12
12
12
24
24
24
24
10
12
16
16
12
16
16
16
H
8
12
12
12
24
24
24
24
N2 Filters
W
D
X
14
18
20
20
14
20
20
20
Z
(inches)
(inches)
8
12
12
12
24
24
24
24
Y
4
4
11
11
4
11
11
11
3
4
4
4
12
12
12
12
11/2
11/2
11/2
11/2
4
4
4
4
Nominal Rated
Capacity
(cfm)
50
125
200
250
500
1000
1250
1500
Max. Initial
Resistance
(Inches w.g.)
1.3
1.3
1.0
1.3
1.0
1.0
1.3
1.3
N1 or N2 Filters with Separator-Type Filter Elements, Standard Sizes
Filter Size
(designator)
H
N1 Filters
W
D
(inches)
BB-A
BB-D
CC-D
CC-F
CC-F
GG-D
GG-F
8
8
12
12
12
24
24
8
8
12
12
12
24
24
8
10
12
16
16
12
16
H
8
8
12
12
12
24
24
N2 Filters
W
D
(inches)
8
8
12
12
12
24
24
12
14
18
20
20
14
20
X
Y
Z
(inches)
31/16
51/2
51/2
11
11
51/2
11
2
3
4
4
4
12
12
11/2
11/2
11/2
11/2
11/2
4
4
Nominal Rated
Capacity
(cfm)
25
50
125
200
250
500
1000
Max. Initial
Resistance
(Inches w.g.)
1.3
1.3
1.3
1.0
1.3
1.0
1.0
Note: Standard Nipple-placement for N1 Filter is downstream. Contact factory for alternate placement. When
ordering N1 or N2 filters, specify size of nipple connections if Flanders’ standard sizes (see “Y” dimension) are
not appropriate for your application.
19
Nuclear Grade HEPA Filters: Design Features and Options
Roughing Prefilter
The case depth dimension of N1 filters may be
extended 2-inches to accommodate a roughing
prefilter. Indicate the ‘P’ prefix in the model number
to specify this option. A special size designator is
required. Contact the factory for details.
Note: Prefilter must be shipped loose for UL 586
listed units.
Prefilter
or
Prefilter
Gasket Seal
Gaskets are made from 1/4 -inch thick x 3/4 -inch
wide closed cell neoprene material. Specify location of the gasket as upstream or downstream, in
the filter model number.
Wood Case
Metal Case
Drilled Flanges
Standard flanges may be located on the open
face or on the nipple connection. These flanges
may be drilled in a standard pattern or according
to customer specifications.
Nipple-Connection Flange
Air Flow
20
Slip-On Flanges
Optional 150 pound slip-on flanges for pipe nipple
connections shall be available in Type 304 stainless steel, and in any standard IPS size. Note:
Other sizes and types of flanges are available per
customer specifications.
Faceguards
The standard faceguard materials are 23-gauge
4 x 4 mesh, welded galvanized dipped steel or
18-gauge Type 304 stainless steel. Faceguards
protect the media, but are not a guarantee against
damage caused by mishandling.
Note: Specify faceguard location as upstream,
downstream or both.
UL 586 (N1 and N2 Filters)
To be UL 586 classified, filters must be submitted
to Underwriters Laboratories for extensive testing
including spot flame and exposure to heated air. A
UL 586 listing is accepted by DOE for the Heated
Air and Spot Flame Test Requirement of Nuclear
Grade HEPA Filters. UL labels are optional and
are applied only if specified by the buyer.
Model Numbers and Specification
Filter Face Flange
Air Flow
Flanders’ standard patterns are as follows: 5/16 -inch
diameter holes equally spaced and centered on the
filter face flange, or equally spaced and centered
on the nipple-connection flange.
3/4 inch
Single-Turn
Flange
Note: To write a specification for Nipple-Connected Filters, use the Designating Charts on pages 21
and 22 to determine the model number. Fill in the
numbered locations in the Suggested Specification text on page 23 with the model number and
other appropriate selections from the listing on
page 12 for SEPARATORLESS® or page 14 for
Separator-type.
Note: Nipple-connected filters are not intended
to serve as containment housings.
Nuclear Grade HEPA Filters: Model Number Development
Model Number Development
To Order:
Specify the desired filter: Refer to the model
number charts in this bulletin and/or to the Model
Number Designating Chart on page 22. Separately
list and explain any required options or any requirements not addressed by the filter model number.
Nuclear Filter Size Designators
Standard Size Filters are designated using the following Alphanumeric Code for the Height, Width
and Depth of the Filter:
Standard Size Designator
Height and Width
Designators
The Filter Model Number
The design and construction of Flanders’ Nuclear
Grade HEPA Filters are coded within the filter
model number, which contains the following information:
Hardware—Clips, handles, bails, etc.
Filter Medium—Standard or acid resistant.
Pack Type—Separatorless® or separatortype.
Case Material—Stainless Steel or wood.
Case Style—Gel or Elastomer gasket seal designs.
Sealant—Material used to seal pack to case
Gasket Type/Location
Faceguard Type/Location
Filter Size Code
UL Code—For filters requiring UL labels. (standard
size filters only.) For odd size or filters requiring a
“Z” drawing, the UL Code must be specified separate from the filter Model Number.
Example:
Depth
(inches)
(inches)
B=8
C = 12
E = 18
G = 24
N = 30
U = 113/8
Y = 233/8
A = 31/16
D = 57/8
D2= 77/8
F = 111/2
F2 = 131/2
Example:
GG-F = 24” H x 24” W x 111/2 D
UL Code
Filter Size
Code
Faceguard
Type/Location
Gasket Type/
Location
Sealant
Case Style
Case Material
Pack Style
Filter Medium
Hardware
T - 007 - U - 43 - 05 - NU - 51 - 23 - GG - FU5
21
Nuclear Grade HEPA Filters: Model Number Designating Chart
Special
Hardware
Options
Filter
Media
Pack
Type
Case
Material
Case
Style
Pack to
Case
Sealant
None
Lifting Bail (for Round Filters) Drilled Flanges 2” Extended Case for Roughing Prefilter Extractor T-Clips for Fluid Seal Filter U-Handles on Wood-frame Filters for Flanders G1- housings Non-woven glass paper (boron silicate microfiber) 99.97% minimum
efficiency
Same as 007, with additional treatment for resistance to HF
Same as 007, with additional treatment for resistance to NHO3 4” deep filter pack (Separatorless®) 11” deep Pureform® DYN-E2 filter pack (Separatorless®) 11” deep filter pack (Separatorless®) Pleated flat sheet with corrugated aluminum separators 14-gauge Type 409 Stainless Steel (Bolted Construction) 14-gauge Type 304 Stainless Steel (Bolted Construction) 14-gauge Type 304L Stainless Steel (Bolted Construction) 14-gauge Type 316 Stainless Steel (Bolted Construction) 14-gauge Type 316L Stainless Steel (Bolted Construction) 3/4” fire-retardant plywood ‘Box-Type’ Construction (for Wood Filters) Double-turn Flanges, both Faces (for Metal Filters) Channel for Gel Seal on One Face (Wood or Metal Filters) Round Filter with No Flange Round Filter with One Upstream Flange Round Filter with Two Flanges Round Filter with Face Channel for Gel Seal N1 Filter - One Downstream Nipple Connection N2 Filter - Two Nipple Connections Fire-Retardant Solid Urethane RTV Silastic Silicone for High Temperature Filters Glass Packing for 1000°F Exhaust Filter
Gasket
Type/
TYPE (1st Box) LOCATION (2nd Box)
0. None 4. Glass packing
1. Neoprene 5. BLU-JEL® Seal 0. None 2. Downstream face
3. Silicone sponge X. (Special Material) 1. Upstream face 3. Both faces
Faceguard
TYPE (1st Box) LOCATION (2nd Box)
0. None 0. None 2. Downstream face
1. 23-Gauge Galvanized Steel
1. Upstream face 3. Both faces
2. 18-gauge Stainless Steel X. (Special Material)
Location
Material/
Location
Filter
Size
UL Code
22
Seven spaces are allotted for filter size codes, although all
spaces may not be required. Standard size designators
(GG-F, etc.) are entered flush left, including dashes. Special
sizes (Alphanumeric Designators and Z-drawings) are entered
flush left with the prefixes (no dashes)
0
B
D
P
T
U
EXAMPLE:
007
003
010
D
U
W
C
42
43
12
13
15
04
00
03
05
RO
R1
R2
R5
N1
N2
NU
NE
NG
G G
—
T
—
0 0 7
—
4
—
4 3
—
0 5
—
N U
—
5 1
—
2 3
—
F U 5
NOTE: UL Code is entered flush left in the remaining boxes. USE this UL Code when applicable:
U5 for UL 586.(Does not apply for Z-drawings)
Nuclear Grade HEPA Filters: Suggested Specifications
Suggested Specifications
The filters shall be model *(1) Nuclear Grade as
manufactured by Flanders Filters, Inc. Washington, NC. The filter medium shall be all glass with
a wet strength, water-repellent binder in accordance with ASME AG-1 Section FC, Mandatory
Appendix FC-I.
To Specify Separatorless Filter Element:
®
Each filter element shall be constructed without
the use of spacers of any kind, including separators, tape, string or strips of medium, by pleating a continuous sheet of a formed, corrugated
medium back and forth upon itself so that it is
self-supporting.
To Specify SEPARATOR-Type Filter
Element:
Each filter element shall be constructed by pleating
a continuous flat sheet of medium over corrugated
.0015 inch minimum thick aluminum spacers
whose edges have been hemmed to resist tearing
the medium at the fold.
The element shall be permanently bonded to a
*(2) integral case with a fire-retardant urethane
sealant. The perimeter of the filter face shall have
*(3) to seal it to its mounting device in service.
Construction of the filter shall be in a accordance
with the essential construction requirements of
ASME AG-1 (latest issue).
Each filter shall be tested, while encapsulated,
for resistance to airflow and penetration in accordance with ASME AG-1 Section FC 5200 at the
nominal rated capacity listed in table FC-4110-1
and at 20% of that capacity for penetration only
(filters with rated capacity of 75 cfm or higher).
The penetration at both flows shall not exceed
0.03%. (This paragraph may not apply to Round,
N1 or N2 filters.)
The HEPA filters shall comply with the performance requirements as listed in ASME
AG-1 Section FC-5200. Each filter and filter
carton shall bear identical labels indicating
the filter model number, the serial number,
test air-flow direction and the resistance and
penetration readings at test flow taken for the
filter on the manufacturer’s Q107 penetrometer
or HFATS System. In addition, the manufacturer
shall provide a filter test report and a Certification
of Compliance report.
The manufacturer shall, upon request, submit
evidence that its filters have been qualified in accordance with ASME AG-1 or can reasonably be
expected to do so.
Filters that are 24” x 12” x 6” and larger shall be
packaged one filter per carton. Each filter shall
be encased in a flanged, tightfitting alignment
cushion sleeve that fits within the carton, leaving
a dead-air space on four sides of the filter. The
top and the bottom of the filter shall be protected
with a cushion or comparible cushon design to
avoid the deleterious effects of shock, vibration,
physical damage, water vapor, salt spray, condensation, and weather during shiping, handling, and
storage. Linerboard cartons shall be strapped to
a Flanders Type 2 pallet with 3/8-inch wood facing
on both faces.
Model Numbers and Specification
Fill in the numbered locations on the Suggested
Specification Text by selecting from the corresponding
category below:
*(1) Filter model number
(See page 22)
*(2) Case material
14-gauge, Type 409 stainless steel (bolted)
14-gauge, Type 304 stainless steel (bolted)
14 gauge, Type 304L stainless steel (bolted)
14-gauge, Type 316 stainless steel (bolted)
14-gauge, Type 316L stainless steel (bolted)
3
/4-inch thick fire-retardant plywood
*(3) Case style
No flanges
Two double turn flanges
A 3/4-inch channel with gel sealant
A single metal-nipple connection
Two metal-nipple connections
23
Nuclear Grade HEPA Filters: Environmental Conditions
Environmental Conditions
Packaging and Palletizing
Heat Resistance
The successful delivery of undamaged HEPA filters
depends largely upon good packaging. Shipping
damage is minimized by encasing each filter in a
tight-fitting alignment cushion that is located at its
top and bottom. This results in a dead-air space
around the filter to absorb impact. Flanders packages Nuclear Grade filters 24” x 12” x 11 1/2” and
larger in this manner.
In high-temperature applications, filter media will
exhibit a significant loss of strength after the binder
burns off. (This normally occurs in the 300°-325°F
range.) Flanders recommends only separator style
filters be used in high temperature applications.
Filters not specifically designed for high temperature applications are nevertheless constructed
from self-extinguishing or noncombustible components and will withstand periodic temperatures
up to continuous 250°F with no noticeable change
in pressure drop or penetration. However, extended service under such conditions can cause
accelerated aging of organic materials and may
subsequently contribute to filter failure.
Humidity and Water Resistance
HEPA filter media will tolerate high humidity (95%
±5%) and some direct wetting, but excessive
moisture, either from airborne droplets or condensation, can plug the filter and result in failure
by over-pressure. Wood cases are unsuitable for
high-moisture conditions, since wood expands or
warps when wet, and supports biological growth
under humid conditions. Metal case filters are
more suitable for moisture laden atmospheres.
Because aluminum separators can corrode in
some environments and slough particles downstream of the filter, Separatorless® filters are
also recommended for moist conditions, except
in high-temperature or caustic applications.
Chemical Resistance
All materials have good resistance to most organic
solvents and are resistant to many weak organic
and inorganic alkalies and acids. Exposure to
acids such as HF, and those with NOx radicals
occurs in nuclear systems fairly often and with
varying degrees of impact (HF attacks glass). Information about the potential effects of humidity,
various chemical agents, and heated air, and the
interrelationship of the construction materials, must
be determined by the user through testing.
24
All filter carton material is tested for strength and
certified to meet all construction requirements of
the applicable freight classification.
Additionally, all Nuclear Grade HEPA filters are palletized for shipment in groups of cartoned filters
stacked side-by-side, with 3/8-inch wood facing at
the two most vulnerable ends and the aggregate
strapped to a wood pallet or crated.
Pleats
Vertical
Installation
Note
HEPA filters should be installed with the pleats
aligned with the vertical axis when the airflow is
horizontal. This prevents sagging and potential
tearing of the medium as the filter becomes
loaded with dust in-service.
Nuclear Grade HEPA Filters: Receipt, Storage, Shelf Life
Receipt and Storage Requirements
HEPA filters should be stored in their original cartons, in an environmentally controlled room.HEPA
filters should be oriented with their pleats vertical,
and stacked no more than three (3) cartons high
unless intermediate bracing or flooring is provided
to prevent the weight of the upper tier from bearing
on the lower tier. Unless there is obvious damage
to the cartons, HEPA filters should not be opened
prior to use, or removed from shipping pallets or
skids until immediately before installation.
Filter storage area should be periodically checked
to ensure filters are not exposed to detrimental
conditions. Storage areas should be uncluttered
and permit easy access to filters. A filter-control
procedure is suggested for the storage area to
ensure filters are not removed from the area without proper authority, and to prevent improper or
rejected items from being installed in the system.
Filters should be moved a minimum number of
times (receipt inspection, storage and release
for installation only) and handled in a manner
that does not damage them or their packaging. If
wrappings or cartons are removed for receiving
inspection, they should be replaced and positively
sealed immediately upon completion of the inspection. Receiving and storage personnel shall
be informed of the necessity of proper handling of
all components, especially the HEPA filters. Care
must be taken to ensure the filter medium is not
touched in anyway.
Shelf Life Information
Flanders recommends that each filter is stored in
its original shipping carton to prevent exposure to
ultra violet rays and possible damage to the filter
medium. The filter should be stored in a controlled
area, 0°-120°F, and should not be exposed to
ozone depleting sources. If these parameters are
satisfied and storage requirements as detailed are
maintained, the filter shelf life should be three (3)
years from elastomer gasket cure date or three
(3) years from manufacturing date for gel seal
filters.
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25
Nuclear Grade HEPA Filters: Blu-Gel® Seal Data
BLU-JEL® Seal Data Sheet
Temperature Range
The gel seal technique provides a simple solution
to a problem that has long been associated with
air filters used in critical applications: bypass leakage at the interface of the filter and its housing or
supporting casework. This bypass can contribute
to high particle counts in clean rooms and laminar
flow work areas.
The recommended constant operating temperature range for BLU-JEL® Seal is -70°F to +392°F.
Short terms (1-2 hours) at higher temperatures
should be limited to 500°F. Exposure to either extreme will not alter the properties of the gel when
returned to ambient temperature. Temperatures
below -70°F wil increase hardness; the gel will become brittle at -90°F and will be prone to cracking
if subjected to mechanical shock. Continuous exposure to temperatures above +392°F will result in
degradation of the polymer.
Bypass leakage occurs primarily where gaskets
are used to seal filters. Many factors contribute
to its occurrence: improper gasket joints; mating
flanges that are not flat or have been distorted
by clamping mechanisms used to compress the
gasket; memory loss or aging of the gasket material; or, bad seals or welds in the filter mounting
casework.
The gel seal technique, first developed and patented by Flanders in 1969, succeeds in eliminating bypass leakage because it avoids the major
causative factors: the use of gaskets and the need
for absolutely flat mating surfaces. The technique
also eliminates clamping devices and allows easy
installation and replacement of filters.
General Description
Flanders BLU-JEL® Seal is a unique, ice-blue silicone gel specially designed to create and preserve
an airtight seal between high-efficiency particulate
air filters and their holding cases or housings. The
gel is factory-installed and factory cured within the
perimeter channel of filters designed for gel seal
applications. The cured gel has the self-healing
quality of a liquid while retaining the stability and
non-flow characteristics of a solid. These properties are maintained at both high and low temperature extremes and are not lost even when aged
continuously at high temperatures. BLU-JEL® Seal
exhibits excellent bonding to many materials. It
is also highly self-adhesive, allowing knife edges
to be cleanly withdrawn. The hydrophobic nature
of the gel makes it ideally suited for applications
that require long-term sealing against moisture
and other atmospheric contaminants.
26
Fire and Explosion Data
Flash Point: Determined by Cleveland ASTM D92
Open Cup Method. Result: No flash at 450°F.
Exposure to Flame
A flame exposure test evaluating BLU-JEL® Seal’s
flammability and self-extinguishing characteristics
was performed, following the same procedure
used in the Underwriters UL 94-VO test. The gel
turned to ash on the outer surface, but the inner
core remained normal. The gel maintained its
physical shape and did not run or melt. Based
upon the testing, it is concluded that BLU-JEL®
Seal is a self-extinguishing material that will perform its designed function as a filter-to-housing
sealant until flame impingement totally turns the
sealant to ash.
Volatility
The non-volatile content of BLU-JEL® Seal, as
determined by testing 2 grams for 2 hours at 302°F
(150°C), is 98%. The volatility rate of the gel, measured after it has been cured at the factory and is
ready for shipment, is 0.2%.
Nuclear Grade HEPA Filters: Blu-Gel® Seal Data
Penetration
Radiation Effects
The effect of temperature on the hardness of
BLU-JEL® Seal has been tested using a Penetrometer test machine. The following results are
expressed in points of penetration (mm x 10-1) as
measured by the machine: @-58°F: 35 @+77°F:
57 @+392°F: 34
The expected radiation resistance of BLU-JEL®
Seal is 20 megarads at room temperature, 10
megarads of radiation at 77°F. Radiation exposure
at these levels will not affect the sealing properties
of the compound. Exposure to higher levels of
radiation and temperature will result in irreversible
brittleness. Further information on radiation testing
is available from the factory.
Chemical Resistance
Information on BLU-JEL® Seal’s resistance to a
wide variety of oils, fuels, hydraulic fluids, solvents, silicone fluid, greases, food products, water
and steam, acids, bases, salts and other chemicals is available from the factory upon request.
Non-Nutrient
BLU-JEL® Seal is a non-nutrient and will not of
itself support biological growth. The compound
does not contain a fungicide.
27
Important Notice
For best results in the application of Flanders’ products, it is recommended that the buyer
supply complete information about the operating conditions of the ventilation system to
Flanders/FFI for prior evaluation. Flanders/FFI does not guarantee that its equipment
will operate at the performance levels given on the identification labels or in the catalog
specifications under all conditions of installation and use, nor does Flanders/FFI guarantee that suitability of its product for the particular end use which may be contemplated
by the buyer. When the system components are supplied to the buyer or his agent for
final installation and assembly in the field, it should be under the supervision of factory
trained personnel who are equipped to test the installation and certify its performance
and conformance to industry accepted specifications. Failure to follow these procedures
may result in a compromised installation.
Representatives of Flanders/FFI products are located
throughout the world.
F O R E M O S T I N A I R F I LT R AT I O N
Flanders Filters, Inc.
531 Flanders Filters Road
Washington, North Carolina 27889
Your closest representative’s office may be found by
contacting our manufacturing and sales department.
Represented by:
Telephone: 252-946-8081
Toll Free: 1-800-637-2803
Fax: 252-946-3425
Website: www.flanders-ffi.com
Flanders/FFI
Printed in USA
09/2007
Flanders Filters continues to research and develop product improvements and reserves the right to change product designs and specifications without notice.