Series PVI/PVIF - VSI Waterworks

M
M
Series PVI/PVIF
Standard and Full Port Eccentric Plug Valves
Conforming to AWWA C517
Publication 517-105
Issue 11/13
Design Features
M
Implementations
The Eccentric Plug valve is the industry standard
for systems that will experience sludge or large
particulate flow. VSI Eccentric Plug Valves are able to
achieve an extremely high port area while keeping the
operating time much lower than the traditional gate
valve.
Eccentric Movement
The most essential function of a valve is that it must
isolate line flow. This action is easy to accomplish,
but with traditional designs as pressure and size
increase the torque required to close the valve
increase exponentially.
To counteract this characteristic all VSI Eccentric
Plug Valves incorporate an offset in the valve design.
By offsetting the plug and shaft centerline from
the valve body and pipe centerline a cam action is
achieved. This action allows the plug to contact the
valve body only in the last 5-10 degrees of movement.
Through the rest of the valve motion the only torque
transmitted to the operator will be from the low
friction bearings and line force on the plug.
The cam action increases the seat force without
increasing operator torque allowing for the use of
more durable encapsulation materials that are often
harder.
Resilient Plug Facing
All VSI Eccentric Plug Valves are equipped as
standard with a fully encapsulated resilient plug. By
fully encapsulating the plug the service life of the
valve is greatly extended by reducing corrosion of the
plug. The resilient nature of the seat allows for driptight shut off. Should small solids become deposited
upon the plug face, tight shut off is still guaranteed.
2
Offset
Valve Offset and Integral Stop
Integral Stop
It is imperative that positive open and close positions
be defined for a valve. The logical nature of the valve
places the close stop at the high torque seat position.
An additional valve open stop is incorporated into VSI
Eccentric Plug Valves to indicate the positive open
position. This eliminates turning the plug into the
wrong valve body side and stops the plug in the ideal
position. This ideal position places the plug with the
least intrusion into the line flow.
Design Features
M
Secured Shafts
All sizes are equipped with shafts that are cast as
a single piece with the plug. Positive positioning and
indication is guaranteed by zero slip.
Bolted Bonnet
Solid Seat Weld
Corrosion-Resistant Seat
A bolted bonnet is standard on all VSI Eccentric
Plug Valves. This bolted bonnet allows the valve to
be serviced without the need to remove from the
pipeline. By removing the bonnet the plug can be
extracted and upper and lower bearings and seals
replaced if necessary.
All VSI AWWA C517 Series Valves are cast with an
integral base for the seat. Upon this base a solid
welding system is used to apply a hard-facing. These
highly corrosion resistant seats are permanent for
the life of the valve and never need replacement.
Standard material is a 90 percent nickel alloy with
stellite and other materials available upon request.
Standardized Bonnet
Unlike the majority of American valve
manufacturers, VSI supplies valves with standardized
bonnet mounts unless otherwise specified. The use
of International Organization of Standardization (ISO)
or Manufacturers Standard Society (MSS) mount
dimensions allows for the attachment of standardized
gearboxes and operators without the need for
specialized adapters. Eliminating these adapters
often reduces cost, minimizes overall dimensions of
the valve package, and reduces weight.
Should there be a need to exchange or retrofit
a newer operator this standardization expands
options while reducing cost. The additional use of
standardized stem diameters and key widths allows
the direct mounting of many commercially available
operators without any drive bush machining or
adapter fabrication.
Bonnet Standardization
EXCELLENCE IN MUNICIPAL VALVES AND AUTOMATION
3
Design Features
M
Simple Packing Replacement
Design Standards
VSI AWWA C517 Series Valves use a standard
ISO valve stem size.
This combined with
industry standard stack heights allows for the
use of off-the-shelf packing. The packing gland
and retention design further allows for the
replacement of the packing without removing
the valve from the line. In some cases the line
pressure can be maintained. All service can be
performed without any special training.
Construction AWWA C517
ASME B16.34
API 598
Coatings AWWA C550
Connections
ANSI B16.1 Class 125*
ANSI B16.5 Class 150
ANSI/AWWA C111/A21.11
ISO 7005
Laying Length
AWWA C517 Short*
ISO 5752
Classifications 150A
150B*
250B
Bonnet
MSS SP-101*
ISO 5211
Easy Packing Removal
4
Stem Diameter
ISO 5211
Key Size
ISO R773
*Standard Option
Materials
M
Material Options
Body and Bonnet
ASTM A536 65-45-12*
Bushings
SS304 Reinforced PTFE*
ASTM A126
Bronze
ASTM A351 CF8
ASTM A351 CF8M
___________________
ASTM A216 WCB
Bearings PTFE*
ASTM A276 316
___________________
Viton
Plug and Stem
Nylon
ASTM A536 65-45-12*
ASTM A126
___________________
PackingEPDM*
ASTM A216 WCB
___________________
PTFE
Seat
NBR
90% Nickle Welded Overlay
Stellite
___________________
___________________
Exterior Hardware
SealNBR*
SS304
EPDM
SS316
FPM
____________________
___________________
O-RingsEPDM*
KeyASTM 1045
PTFE
Zinc Plated CS*
*Standard Option
Other Materials Avaliable Upon Request
NBR
___________________
Seal Selection Guide
Designation
Common
Name(s)
Composition
Min/Max
Temperature
Range
General Properties
Resistant to:
Attacked by:
-100 F/ 450 F
Acids, harsh inorganic
Excellent abrasion resisand organic chemicals,
tance and chemically
oils, oxidizing agents, and
inert
solvents
Molten alkali metals and fluorine at high temperatures
Animal and vegetable
oils, ozone, strong and
oxidizing chemicals.
Mineral oils and solvents,
aromatic hydrocarbons.
Teflon®
Polytetrafluoroethylene
EPDM, EPM
EPDM
Ethylene-propylene- diene;
Ethylene-propylene
-40 F / 300 F
Excellent ozone, chemical, and aging resistance. Poor resistance to
petroleum-based fluids.
NBR
Buna-N
Nitrile-butadiene
-30 F / 250 F
Excellent resistance to
petroleum-based fluids.
Good physical properties.
Many hydrocarbons, fats,
oils, greases, hydraulic
fluids, chemicals.
Ozone (except PVC blends),
ketones, esters, aldehydes,
chlorinated and nitro hydrocarbons.
Viton®
Hexaflouropropylene- vinylidene fluoride
- 10 F / 400 F
Excellent oil and air
resistance both at low
and high temperatures.
Very good chemical
resistance.
All aliphatic, aromatic
and halogenated hydrocarbons, acids, animal
and vegetable oils.
Ketones, low molecular weight
esters and nitro containing
compounds.
PTFE
FPM
EXCELLENCE IN MUNICIPAL VALVES AND AUTOMATION
5
6
A
115
133
160
SIZE
3
4
6
207
180
147
B
35
35
40
C
38
38
28
D
Packing
OD
48
58
Packing
ID
28
38
32
Packing
Height
220
178
160
Bonnet
O-Ring
ID
4
Bonnet
O-Ring
Height
267
229
203
E
8
4
190.5
241.5
279
4
22
-
229
0
4
152.5
J
190
I
G
F
H
3/410UNC
5/811UNC
3/410UNC
K
M
125
L
150
For Additional Sizes, Mechanical Joint, and 100% Port Please Contact VSI
4
N
13
O
10
8
Key
Size
85%
91%
85%
Port
Area
Dimensions
M
D
C
B
H x ØI
A
JxK
ØL
G
ØM
N x ØO
F
E
DIN
200
300
350
400
SIZE
8
12
14
16
413
366
320
203
A
520
473
395
311
B
114
114
97
60
C
80
80
76
50
D
Packing
OD
70
90
100
100
Packing
ID
50
76
80
80
25
25
18
18
Packing
Height
Bonnet
O-Ring
Height
4
4
4
4
Bonnet
O-Ring
ID
256
300
390
390
4
8
4
8
298.5
432
476.5
540
343
483
533
597
356
432
451
292
H
G
F
E
30
30
25
19
I
8
8
8
4
J
L
210
296
296
296
K
5/811UNC
7/89UNC
1-8UNC
1-8UNC
For Additional Sizes, Mechanical Joint, and 100% Port Please Contact VSI
N
4
8
8
8
M
165.1
254
254
254
19
19
19
22
O
22
22
22
16
Key
Size
80.1
79.7
80.4
81
Port
Area
M
Dimensions
D
C
B
H x ØI
A
JxK
ØL
G
EXCELLENCE IN MUNICIPAL VALVES AND AUTOMATION
ØM
N x ØO
F
E
7
VSI Waterworks, LLC
tel:
+1 (770) 740 0800
fax:
+1 (770) 740 8777
email: [email protected]
www.vsiwaterworks.com
As part of a process of on-going product development,
VSI reserves the right to amend or change specifications without prior notice. Published data may be subject to change. For the latest version, vist our website
at www.valvesolutions.com