SVL300-Model 39 Dry Pipe Valves.pmd

123456
Fire Protection Equipment
#SVL300 - Model 39 Dry Pipe Valves
"Automatic" Sprinkler
150 Gordon Drive
Exton, PA 19341 USA
Tel: (610) 363-1400
800-626-2682
Fax: (610) 524-9073
800-858-6857
www.Kidde-Fire.com
TABLE OF CONTENTS
Text
Page
General ................................................................................................................................................................... 1
Approvals ................................................................................................................................................................ 1
Description / Operation .......................................................................................................................................... 1
Technical Data ........................................................................................................................................................ 2
Figure 1 - Operation Diagram: Model 39 Dry Pipe Valve Set Position .............................................................. 3
Figure 2 - Operation Diagram: Model 39 Dry Pipe Valve Operating Position .................................................... 3
Ordering Information .............................................................................................................................................. 4
"Automatic" 4” Model 39 Dry Pipe Valve Assembly - Parts List ........................................................................... 5
"Automatic" 6” Model 39A Dry Pipe Valve Assembly - Parts List ........................................................................ 6
"Automatic" 4” Model 39 Dry Pipe Valve - Basic Trim Setup 39-4B
with Manual Control Connections - without Accelerator - Parts Drawing & List ........................................... 7
"Automatic" 4” Model 39 Dry Pipe Valve - Trim Options ...................................................................................... 8
"Automatic" 6” Model 39A Dry Pipe Valve - Basic Trim Setup 39-6D
with Manual Control Connections - without Accelerator - Parts Drawing & List ........................................... 9
"Automatic" 6” Model 39A Dry Pipe Valve - Trim Options .................................................................................. 10
Air Supply Connections ........................................................................................................................................ 11
Owner’s Air Supply - Automatic .................................................................................................................... 11
Nitrogen Cylinder Air Supply - Automatic (Air Pressure Maintenance Device) .......................................... 11
Calculating Nitrogen Requirement ................................................................................................................ 11
"Automatic" Accelerator Model 1 ......................................................................................................................... 12
General Description ....................................................................................................................................... 12
Installation ...................................................................................................................................................... 12
Operation ....................................................................................................................................................... 13
Procedure for Operational Testing of Accelerator Model 1 (85-100) .......................................................... 14
Resetting Procedure ...................................................................................................................................... 14
Accelerator Field Repairs .............................................................................................................................. 15
"Automatic" Accelerator Model 1 - Replacement Parts List & Drawing .................................................... 15
Air Pressure Maintenance Device Mode A-1 ...................................................................................................... 16
General Description ....................................................................................................................................... 16
Maintenance ................................................................................................................................................... 16
Air Pressure Maintenance Device Mode A-1 - Replacement Parts List & Drawing .................................. 17
i
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Velocity Check Valve 39-300 and Replacement Kit 39-310 .............................................................................. 18
Trouble Alarm Silencing Panel ............................................................................................................................ 18
Model 39-740A - Manual Resetting Type ........................................................................................................ 18
Testing and Maintenance ..................................................................................................................................... 19
Testing ............................................................................................................................................................ 19
Testing Waterflow Alarm Devices ............................................................................................................. 19
Testing Low-Air Pressure Alarm Devices ................................................................................................. 19
Flow Test at Main Drain Valve (Main Drain Test) ...................................................................................... 19
Trip Testing of Dry Valve ........................................................................................................................... 20
Trip Test- Partial Flow ............................................................................................................................... 20
Trip Test- Full Flow ................................................................................................................................... 20
Tags / Records ......................................................................................................................................... 21
Maintenance ................................................................................................................................................... 21
Clapper Facing ......................................................................................................................................... 21
Seat Rings ................................................................................................................................................ 21
Velocity Check Valve ................................................................................................................................ 21
Accelerator ............................................................................................................................................... 21
Antiflooding Device ................................................................................................................................... 21
Alarm Line Strainer ................................................................................................................................... 21
Alarm Test Valve, Main Drain Valve, Inspectors Test & Air Supply Control Valve (Manual Setup) ............ 21
System Control Valve, Alarm Control Valve & Air Supply Control Valve (Automatic Setup) ...................... 22
Dry Valve & Trim ....................................................................................................................................... 22
Air Maintenance Device or Automatic Control Connections ..................................................................... 22
Air Compressor ........................................................................................................................................ 22
Air Pressure .............................................................................................................................................. 22
Priming Water Level ................................................................................................................................. 22
Valve Enclosure ........................................................................................................................................ 22
System Low Points ................................................................................................................................... 22
Resetting of System ................................................................................................................................. 23
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DATA SHEET
#SVL300
MODEL 39
Dry Pipe Valves
General
The “Automatic” Model 39 Dry Pipe Valve is a waterflow
control/alarm device designed for installation in the main
supply to a dry pipe sprinkler system. Its purpose is twofold.
First, it holds back the water, keeping it from flowing into
the system until such time that sprinklers operate. This
function is accomplished by the special design of the valve
(see Description / Operation).
Second, it provides the means to actuate a fire alarm when
the flow of water from the system equals or exceeds that
of a single sprinkler. The alarm may be accomplished in
two ways: (1) mechanically by means of a water flow to a
water motor alarm and/or (2) electrically via a water-pressure-actuated alarm switch (circuit closer) connected to
an electrically operated signaling device such as a bell or
light.
Approvals
The Model 39 Dry Pipe Valve is made in two sizes: 4" (101.6
mm) and 6" (152.4 mm).
•
•
•
•
Note: For general discussion, both the 4" and the 6" valve
sizes are referred to as Model 39 Dry Pipe Valves. Operationally, the two are the same. But technically, because of
modifications made in the clapper subassembly, the 6"
valve is now designated as a Model 39A, except for LPCB
approved construction which continues as Model 39. This
specific designation is used for all technical data pertaining to the particular valve.
Note: In the general discussion, the terms dry pipe valve
and dry valve are used interchangeably; and so are the
terms dry pipe system and dry system.
Each dry valve is provided with a basic trim package that
includes manual air supply connections, priming connections, drain connections, alarm outlets and an alarm test
by-pass. Optional trim packages are available to provide
connections for an automatic air supply, or for a manual or
automatic nitrogen supply. Alarm and supervisory devices
may be provided separately.
A trim package is available to add the "Automatic" Model 1
Accelerator to the Model 39 Dry Valve. This quick-opening
device is required when the system capacity exceeds 500
gallons (per NFPA 13). See NFPA 13 for exceptions.
www.Kidde-Fire.com
Model 39 Dry Pipe Valves are listed or approved by the
various testing and inspection organizations concerned
with product evaluation. These include:
Underwriters Laboratories (UL)
Factory Mutual (FM)
Underwriters Laboratories of Canada (ULC)
Loss Prevention Certification Board (LPCB)
These valves are listed/approved with specific trim and for
installation in accordance with the applicable requirements
of NFPA 13. Therefore, no substitutions or omissions, in
part or in full, are allowed. For the particular listings and/or
approvals of each dry valve, refer to Technical Data section of this data sheet.
The Model 1 Accelerator is listed and approved for use
specifically with the Model 39 Dry Pipe Valves.
All devices are listed/approved for a maximum water working pressure (WWP) of 175 psi (1206.6 kPa or 12.1 bar).
Description / Operation
The Model 39 Dry Pipe Valve is a differential type valve
having an intermediate chamber. Its design is such that a
relatively low air pressure may be used to keep the clapper closed against a higher water supply pressure.
In the set position (see Figure 1), the rubber-faced clapper closes tightly on two concentric seat rings. The inner
ring is the water seat ring; the outer is the air seat ring.
The annular space between the two rings is the intermediate chamber. When the valve is in service (set), this cham-
ber is open to the atmosphere through the velocity check
valve.
connections to sound the water motor alarm and/or operate the pressure-actuated alarm switch.
Priming water is provided above the clapper up to the level
of the air supply connections. Above the priming water level,
compressed air (or nitrogen) is maintained at a pressure
sufficient to keep the clapper closed. The purpose of the
priming water is to provide a positive seal to prevent air
from escaping through the intermediate chamber. The air
pressure, then, acting on the priming water over the larger
area above the clapper, offsets the higher water pressure
acting on a smaller area below the clapper (area of the
larger air seat ring versus the area of the smaller water
seat ring). The clapper will remain in the closed position
as long as the air pressure in the system is maintained at
the proper level. For air pressures to be used for various
water supply pressures, see Maintenance - Air Pressure.
When a sprinkler operates, the system loses its air pressure through the opened sprinkler. This loss lowers the
system pressure to a point where it can no longer keep
the dry valve closed. The water supply pressure, then, lifts
the dry valve clapper and forces it up into the open or operated position (see Figure 2). Water flows into the system and on to the opened sprinkler(s). At the same time,
water flows into the intermediate chamber, closes the velocity check valve, then continues on via the alarm line
The Model 39 Dry Pipe Valve has a trip ratio of approximately 6 to 1. This means that the valve will open (trip)
when the air pressure in the system is reduced to about
one-sixth of the water supply pressure.
On large systems, it can take longer to lower the air pressure to the trip point of the dry valve. To speed up the
operation of the valve, a quick-opening device (QOD) is
required. The QOD used with the Model 39 Dry Valve is
the Model 1 Accelerator. Its operation with the valve is as
follows:
When a sprinkler operates, the accelerator responds to
the rapid drop in air pressure. It opens and allows the remaining air pressure to pass to the intermediate chamber
of the dry valve where it assists the water pressure in overcoming the pressure differential. In the intermediate chamber, the redirected air pressure acts on the underside of
the clapper in the area between the air and the water seat
rings while the water pressure is acting on the area within
the water seat ring. Together, then, the air and water pressures overcome the air pressure acting alone on top of the
clapper. This forces the clapper to open quickly. The operation of the dry valve has been accelerated.
Technical Data
Available Sizes: .................. • 4" (101.6 mm) Model 39
• 6" (152.4 mm) Model 39A
Inlet & Outlet: ...................... Class 125 Flanged
7 .0
(4 8 .3 )
5 .0
(3 4 .5 )
Water Working Pressure: .... 175 psi (1206.6 kPa or
12.1 bar)
• Nitrogen Cylinders & Connections
• Accelerator/Accelerator Trim Options
Listings & Approvals: .......... • UL Listed
• FM Approved
m m
)
• Air Maintenance Device
2 .0
(1 3 .8 )
4 in
. (1
0 1
.6
Trim Options: ..... • Automatic Control Connections
P r e s s u r e in p s i ( k P a )
Connections
1 .0
(6 .9 )
0 .5
(3 .4 )
6 in
. (1
5 2 .
4 m
m )
3 .0
(2 0 .7 )
Basic Trim Setup: ............... With Manual Control
• ULC Listed
• LPCB Approved
- 4" & 6” Model 39
Pressure Loss:
For use in hydraulic calculations, the pressure loss through
the alarm valve may be expressed as equivalent feet of
pipe:
• 4" Valve = 22 Ft
• 6" Valve = 26 Ft
Conversion Factors:
0 .1
(0 .7 )
1 0 0
(3 7 9 )
2 0 0
3 0 0
(7 5 7 ) (1 1 3 6 )
5 0 0
(1 8 9 3 )
F lo w
in g p m
1 0 0 0
(3 7 8 5 )
2 0 0 0
3 0 0 0
(7 5 7 0 ) (1 1 3 5 5 )
( L /m in .)
Pressure Loss Curves
• 1 inch
• 1 psi
= 25.4 millimeters (mm)
= 6.895 kilopascals (kPa)
0.0689 bar
• 1 gallon = 3.785 liters (L)
2
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SVL300
3
"Automatic" Model 39 and 39A Dry Pipe Valves
Ordering Information
•
"Automatic" Model 39 and 39A Dry Pipe Valves
4" Model 39
Symbol
Item/Setup
Dry Pipe Valve only (without trim)
6" Model 39A
Part
Symbol
Part
Number
Number
Number
Number
39-400
8039400
39-600A
8039710
Basic Trim setup for Dry Pipe Valve:
Manual Control Connections – for supply from owner’s air or
Nitrogen source, or from a manually operated air compressor.
39-4B
1404800
39-6D
1404860
39-441
8039441
39-642
8039642
Automatic Control Connections – to connect to Basic Trim Setup –
for supply from an automatic air compressor serving one dry system
only.
39-ACC
1404861
39-ACC
1404861
Air Maintenance Device - “Automatic” Model A-1 – to connect to
Basic Trim Setup – to provide automatic control from owner’s air or
nitrogen source, or from an automatic air compressor serving one or
more systems.
39-760
8039760
39-760
8039760
Nitrogen Cylinders & Connections – nitrogen supply source to
connect to manual control setup (Basic Trim Setup) or to automatic
control setup (Basic Trim Setup with Air Maintenance Device).
39-ON
1404819
39-ON
1404819
-
-
-
-
Trim Option for Accelerator ( less Accelerator):
Note: Accelerator is to be ordered separately and in addition to the
trim option.
Accelerator – “Automatic” Model 1
Trim Options for Air/Nitrogen Supply Connections:
Optional Alarms:
Note: Connections for an Alarm Switch and a Low Air Pressure Alarm
Switch are included as part of the Basic Trim Setup. The switches,
however, must be ordered separately.
4
SVL300
"Automatic" 4" Model 39 Dry Pipe Valve Assembly
Parts List
•
"Automatic" 4” Model 39 Valve Assemblies - Symbol No. 39-400
4” Valve
Item
Number
Part Name
Material
Valve Body Subassembly
Symbol
Part
Number
Number
S39-401
8039401
Cast Iron
-
-
Water Seat Ring †
Brass
-
-
Air Seat Ring †
Brass
-
-
1
Body
2
3
•
Handhole Cover
Cast Iron
39-402
8039402
•
Nameplate
Aluminum
-
-
•
Drive Screws: #0 x ¼” – 2 required
Steel
-
-
Rubber
39-425
8039425
1402362
•
Handhole Gasket
•
Stud Bolts – 5/8” – 11 x 2-1/4” Long – 10 required
-
•
Hex Nuts – 5/8” – 11 – 10 required
-
1600749
S39-430
8039430
Clapper Subassembly
4
Clapper
Bronze
39-403
8039403
5
Clapper Facing
Rubber
39-424
1039424
6
Facing Retaining Ring
Brass
39-405
8039405
7
Retaining Ring Screws
8
Clapper Latch
Bronze
39-406
8039406
9
Latch Pin
Monel
39-418
8039418
10
Cotter Pins – 2 required
Brass
3/8” – 16 x 7/8” long – 6 required
Brass
1420155
1417143
11
Hinge Pin
Brass
39-416
12
Hinge Pin Bushings (2 in Body)†
Brass
-
8039416
-
13
3/4 Plug
Brass
-
2096104
14
Velocity Check Valve Assembly
39-300
8039300
15
Stud Bolts – 5/8” – 11 x 2-3/4” long – 4 required
Steel
-
1402363
16
Hex Nuts – 5/8” – 11 – 4 required
Steel
-
1600749
• Handhole cover and related items are not shown in detail.
† These items are not field replaceable.
Special Note: When a complete valve assembly is
provided, the Velocity Check Valve Assembly (14),
Stud Bolts (15) and Nuts (16) are boxed separately
and placed inside the valve for shipment.
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5
"Automatic" 6" Model 39A Dry Pipe Valve Assembly
Parts List
•
"Automatic" 6” Model 39A Valve Assemblies - Symbol No. 39-600A
6” Valve
Item
Number
Part Name
Material
Valve Body Subassembly
Symbol
Part
Number
Number
S39-601
8039151
Cast Iron
-
-
Water Seat Ring †
Brass
-
-
Air Seat Ring †
Brass
-
-
1
Body
2
3
•
Handhole Cover
Cast Iron
39-602A-1
8039152
•
Nameplate
Aluminum
-
-
•
Drive Screws: #0 x ¼” – 2 required
Steel
-
-
Rubber
39-625
8039175
•
•
Handhole Gasket
Hex Head Cap Screws – 3/4” – 10 x 1-3/4” – 10 required
-
1420125
S39-603-4
8039604
Ductile Iron
39-603-1
8039603
Rubber
39-624A
1039625
Cast Iron
39-605
8039157
Steel
Clapper Subassembly
4
Clapper
5
Clapper Facing
6
Facing Retaining Ring
7
Retaining Ring Screws – 12 required
Brass
39-612
8039162
8
Clapper Latch
Bronze
39-606C
8039156
9
Latch Pin
Monel
39-618A
8039168
10
Cotter Pins – 2 required
Brass
-
1417143
11
Latch Spring
Bronze
39-628A
1039628
12
Hinge Pin Bushings (2 in Clapper) †
Brass
-
-
Stainless Steel
39-616-1
8039616
13
Hinge Pin
14
Hinge Pin Bushings (2 in Body)†
Brass
-
-
15
3/4” Plug
Brass
-
2096104
16
Velocity Check Valve Assembly
-
39-300
8039300
17
Stud Bolts – 3/4” – 10 x 3” long – 4 required
Steel
-
1402371
18
Hex Nuts – 3/4” – 10 – 4 required
Steel
-
1600750
• Handhole cover and related items are not shown in detail.
Special Note: When a complete valve assembly is
† These items are not field replaceable.
provided, the Velocity Check Valve Assembly (16),
Stud Bolts (17) and Nuts (18) are boxed separately
and placed inside the valve for shipment.
6
SVL300
"Automatic" 4" Model 39 Dry Pipe Valve
Basic Trim Setup 39-4B
with Manual Control Connections - without Accelerator
SVL300
7
"Automatic" 4" Model 39 Dry Pipe Valve - Trim Options
8
SVL300
"Automatic" 6" Model 39A Dry Pipe Valve
Basic Trim Setup 39-6D
with Manual Control Connections - without Accelerator
SVL300
9
"Automatic" 6" Model 39A Dry Pipe Valve - Trim Options
10
SVL300
Air Supply Connections
Owner’s Air Supply - Automatic
Note: The Orifice By-Pass Valve must be normally closed
or valve operation will be serously impaired. The two isolating valves (normally open) are closed only to service
the Air-Pressure Maintenance Device between them.
The Air Pressure Relief Valve is set at 5 psi above maximum permissible pressure to assure against excessive
pressure in Dry Pipe System.
Automatic control connections for Owner’s Air or Nitrogen
source automatically maintains proper pressure from these
supplies to the dry pipe valve. Automatic control is provided by the Model A-1 Air Pressure Maintenance Device
(see separate section for this unit).
Calculating Nitrogen Requirement
1.
Calculate system capacity in gallons using table below:
Pipe
Size
Gal.
Per Ft.
Pipe
Size
Gal.
Per Ft.
Pipe
Size
Gal.
Per Ft.
1
1-1/4
1-1/2
2
.045
.078
.106
.174
2-1/2
3
3-1/2
4
.248
.383
.513
.660
5
6
8
1.04
1.50
2.66
Sch. 40 pipe for 1” thru 6”.
Sch. 80 pipe for 8”.
Air Supply connections for Nitrogen Cylinder-Automatic are
the same as for owner’s Air Supply-Automatic. The Cylinder connections are ordered and furnished separately.
SVL300
Determine Pressure requirement.
3.
Read across bottom to point including system capacity, then up to line past pressure requirement curve
intersection. At left the number of cylinders needed is
given. Be sure to order enough spares to refill system
in case of operation.
N o . o f N itr o g e n C y lin d e r s
C o n ta in in g 2 5 2 F t 3 G a s a t 2 1 0 0 P S IG
Nitrogen Cylinder Air Supply - Automatic
(Air Pressure Maintenance Device)
2.
4
3
IG
P S
5 5
S IG
P
4 5
S IG
3 5 P
IG
2 5 P S
IG
S
P
2 5
2
0
1
0
2 0 0
4 0 0
6 0 0
8 0 0
1 0 0 0
1 2 0 0
1 4 0 0
1 6 0 0
11
"Automatic" Accelerator Model 1
General Description
Installation
An accelerator is an accessory device used on large dry
pipe systems to hasten dry valve operation. NFPA Pamphlet 13 requires that each standard dry valve controlling
a system with a capacity of more than 500 gallons must
be provided with an accelerator.
An accelerator is an accessory device used on large dry
pipe systems to hasten dry valve operation. NFPA Pamphlet 13 requires that each standard dry valve controlling
a system with a capacity of more than 500 gallons must
be provided with an accelerator.
In a fire condition, the accelerator redirects air pressure
from the system piping into the intermediate chamber of
the dry pipe valve. This air pressure assists the water pressure to overcome the pressure differential and opens the
dry pipe valve.
See figure below.
The Model 1 Accelerator is UL Listed and FM Approved
for use with the "Automatic" Model 39 and 39A Dry Pipe
Valve.
Accelerator Connections
12
SVL300
"Automatic" Accelerator Model 1
Accelerator Dome
Diaphragm Plunger
Figure 1
Restriction Pin
To Intermediate Chamber
Foam Sprinkler Piping
Exhaust Valve
Valve Spring
Accelerator Dome
Figure 2
Operation
(See Figure 1)
Under normal conditions. the valve spring keeps the exhaust valve seat up against its seat rirlg with equal pressure from the piping system above and below the diaphragm.
Air pressure from the sprinkler piping can freely pass to
the underside of the diaphragm through a hole. Air pressure can seep slowly into the accelerator dome through
the restricted orifice formed by the restriction pin and the
stem of the dome plunger. With the ex- haust valve up
against its seat, air pressure cannot pass into the intermediate chamber.
SVL300
(See Figure 2)
Operation of the exhaust valve occurs when an opened
sprinkler causes sudden pressure drop in system piping.
When a sharp pressure drop occurs, it does not affect the
air pressure in the dome immediately. Therefore, the greater
pressure in the dome opens the exhaust valve and permits air pressure to pass in into the intermediate chamber.
13
"Automatic" Accelerator Model 1
Procedure for Operational Testing of
Accelerator Model 1 (85-100)
Before proceeding with test, make certain that accelerator
shut-off valve is open and that the 250 psi air pressure
gages on top of the accelerator dome and in the air supply
priming line are equalized at system air pressure.
1.
Close controlling gate valve.
2.
Open 2" main drain to relieve pressure under clapper.
3.
Close accelerator shut-off valve.
Note: If there are leaks of sufficient magnitude in
the joints between the shut-off valve and the
accelerator, accelerator operation may occur
upon closing the shut-off valve.
4.
5.
Resetting Procedure
If an Accelerator, Model 1, is used with the dry pipe sprinkler system it must be cleaned and reset as follows:
1.
Remove bottom plug and attached spring, exhaust
valve seat, and restriction pin.
2.
Carefully clean rubber seat of exhaust valve, exhaust
valve seat rings, and restriction pin making sure that
no foreign matter adheres to them and that they are
not damaged. Use smoking pipe cleaner to clean passage in diaphragm plunger and make sure that all water
is drained from the accelerator dome. Removal of the
accelerator air gage provides an opening to atmosphere so that the dome can be drained.
3.
Replace bottom plug and related parts. If bottom plug
gasket is not in good condition, replacement is necessary.
4.
Make sure accelerator shut-off valve is open.
Slowly, loosen 1/2" union between the accelerator shutoff valve and the accelerator.
Accelerator operation can be detected by the audible
tripping of the accelerator followed by decreasing accelerator dome pressure.
6.
Retighten 1/2" union between accelerator shut-off
valve and accelerator.
7.
Slowly open accelerator shut-off valve while listening
for air discharge through the velocity check. The sound
of air escaping through the velocity check will insure
that the accelerator has operated.
8.
After allowing accelerator dome pressure to drop sufficiently below system air pressure, fully open accelerator shut-off valve and allow accelerator dome
pressure to equalize.
9.
Bring system to proper air pressure.
After allowing about one-half hour to lapse, check air gage
mounted on accelerator dome to see that accelerator dome
pressure has equalized with sprinkler piping pressure.
10. Close 2" main drain.
11. Open controlling gate valve.
14
SVL300
"Automatic" Accelerator Model 1
Accelerator Field Repairs
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Remove accelerator from dry pipe valve after first shutting off the water supply and bleeding the air from the
system.
Remove bottom plug 85-3 and restriction pin screw
85-9.
Remove restriction pin S85-103 being careful not to
bend, and exhaust valve S85-102.
Remove lower chamber S85-101 A from dome 85-19.
Remove retaining ring screws 1420274 and diaphragm
retaining ring 85-5.
Remove diaphragm 85-12, diaphragm washer 85-15
and restriction tube 85-11 .
Clean out all sediment above or below diaphragm.
Replace exhaust valve S85-102 with a new one or
grind disc smooth with fine grinding compound or emery cloth.
If restriction pin S85-103 is bent or rusty, it should be
replaced with a new one. The new pin may have to be
filed somewhat smaller in some cases or the pressure
will not equalize in the dome.
If valve spring 85-10 is not in good condition, replace
with a new one.
Replace diaphragm 85-12, diaphragm washer 85-15
and dome gasket 85-17 with new ones. Gasket 85-17
is important and must be 3/32" thick or it will allow
diaphragm plunger 85-4 to protrude too low and keep
exhaust valve from closing tight against seat.
After desired parts have been replaced, reassemble,
being sure everything is air tight. It is easy to have a
small leak in some of the gaskets if not extremely careful.
Re-install the accelerator on the dry pipe valve and
reset the valve in accordance to instructions under Resetting System in Dry Pipe Bulletin 305 or page 23 of
this data sheet.
Note:The dome gasket 85-17 is to be coated on both
sides with Dow Corning Valve Seal Lubricant, or
equivalent, before assembly.
"Automatic" Accelerator Model 1 - Replacement Parts List
Note: Order Replacement Parts by Part Number
Part
Number
Symbol
Number
Description
8085002 ......... 85-3 ......... Bottom Plug
8085003 ......... 85-4 ......... Diaphragm Plunger
8085004 ......... 85-5 ......... Diaphragm Retaining Ring
8085602 ...... S85-102 ..... Exhaust Valve
8085603 ...... S85-103 ..... Restriction Pin
8085018 ......... 85-9 ......... Restriction Pin Screw
1085010 ........ 85-10 ........ Valve Spring
SVL300
Part
Number
Symbol
Number
Description
8085009 ......... 85-11 ....... Restriction Tube
1085012 ......... 85-12 ....... Diaphragm
8085012 ......... 85-14 ....... Bottom Plug Gasket
8085013 ......... 85-15 ....... Diaphragm Washer
8085014 ......... 85-16 ....... Diaphragm Nut
8085015 ......... 85-17 ....... Dome Gasket
1420274 ............. - ........... Diaphragm Retaining Ring Screw
15
Air Pressure Maintenance Device
AIR PRESSURE MAINTENANCE DEVICE
Model A-1: 39-760 (1/2" size)
General Description
The air pressure maintenance device is an accessory device designed to maintain automatically, within predetermined limits, air pressure requirements in a dry pipe system. Air passes from the system air supply into the air pressure maintenance device where it is regulated to the air
pressure required for the dry pipe sprinkler system. Small
air losses are restored automatically without delaying system operation.
The orifice by-pass globe valve, item 10, is normally closed.
It is opened only to admit air more quickly into the sprinkler piping when the dry pipe system is being pressurized
upon completion of installation or when the dry pipe system is being reset and system pressure is being restored.
The two isolating valves, items 9, are normally open. They
are closed only to service the air pressure maintenance
device components between them.
Air pressure maintenance device Model A-1 is listed by
Underwriter’s Laboratories and approved by Factory Mutual.
The orifice, item 13, restricts the rate of air flow into the
system and prevents the air supply from replenishing a
large volume of air such as would be lost from a fire opened
sprinkler.
Components
The air supply line components (shown below and on page
16) are standard on "Automatic" Owner’s Air Supply.
The regulator, item 1, has a maximum primary inlet pressure of 175 psi (1206.6 kPa) and a maximum secondary
outlet pressure of 60 psi (413.7 kPa). It is factory set at 35
psi (241.3 kPa), however, it can be adjusted to suit field
requirements. The outlet pressure of the regulator can be
varied by loosening the locknut (on the regulator) and turning the adjusting knob clockwise (in) to increase the pressure or counterclockwise (out) to decrease the pressure.
The pressure setting can be determined by reading the
system air pressure gauge.
16
The check valve, item 11, prevents system water pressure
from entering the pressure regulator when the system is
tripped.
A strainer, item 12, prevents foreign material in the air supply from blocking the orifice.
Maintenance
Periodically check the orifice and strainer for blockage.
Verify that the orifice by-pass globe valve is closed and
the isolating valves are open for proper operation of the
device.
SVL300
Air Pressure Maintenance Device
Air Pressure Maintenance Device - Replacement Parts List
Model A: 39-760
Item
Part Number
1 ...............................
2 ...............................
3 ...............................
4 ...............................
6 ...............................
7 ...............................
8 ...............................
9 ...............................
10 ..............................
11 ..............................
12 ..............................
13 ..............................
15 ..............................
18 ..............................
19 ..............................
SVL300
Description
Qty
1601385 ................................ 1/4" Regulator ........................................................... 1
2034202 ................................ 1/4" x 90° Street Ell - Black ...................................... 2
4072401 ................................ 1/4" x 1-1/2" Nipple - Black ....................................... 3
4072405 ................................ 1/4" x 3" Nipple - Black ............................................. 1
4072020 ................................ 1/2” Close Nipple - Black .......................................... 2
2018014 ................................ 1/2" x 1/2" x 1/4" Tee - Black .................................... 2
2039204 ................................ 1/2” Union - Black ..................................................... 2
5101001 ................................ 1/4" Globe Valve - Brass ........................................... 2
5101002 ................................ 1/2" Globe Valve - Brass ........................................... 1
5301005 ................................ 1/4" Check Valve - Brass .......................................... 1
2016044 ................................ 1/4" Strainer - Brass ................................................. 1
8039751 ................................ 1/16" Orifice Restriction - Brass ............................... 1
1075690 ................................ Label ......................................................................... 1
4072024 ................................ 1/2” x 2-1/2” Nipple - Black ....................................... 2
2039202 ................................ 1/4” Union - Black ..................................................... 1
17
"Automatic" Model 39 Dry Pipe Valve
Velocity Check Valve 39-300
and Replacement Kit 39-310
The main function of the velocity check valve is to prevent
seepage from building up pressure in the intermediate
chamber and to allow the alarm line to drain.
Install with exhaust holes pointing downward into drip cup.
Trouble Alarm Silencing Panel
The Trouble Alarm Silencing Panel is used with Model 39
and 39A Dry Valves in conjunction with a Low Air Pressure
Switch and a Horn, Siren or Bell. Its function is to silence
the Trouble Alarm Signal until the cause can be located
and corrected. It can also be used with a monitor switch, a
low liquid level switch or with any electrical detecting device which will open or close a circuit.
The Velocity Check Valve consists of a hollow cylindrical
chamber with a beveled orifice and a brass ball.
This is screwed into a 1-1/4” tapped outlet on the newer
Model 39 Dry Valves.
For installation on the old type casting, a mounting plate
(39-303) is available as part of the Replacement Kit 39310.
Model 39-740A - Manual Resetting Type:
The Trouble Alarm will sound and the toggle switch will
illuminate when a Low Air Pressure Trouble Alarm Switch
(or other signalling device) closes the circuit due to an
abnormal condition. Throwing the switch to the “Off” position silences the alarm. The toggle switch will continue to
illuminate. When the trouble has been corrected, the toggle
switch will cease to illuminate and the alarm will commence
sounding. Throwing the switch to the “On” position (Normal) will silence the alarm and place the circuit in normal
operating position.
Ordering Information
When ordering, specify: Model 39-740A - Trouble Alarm
Silencing Panel.
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Testing and Maintenance
Reference.
NFPA 25, Recommended Practice for the Inspection, Testing and Maintenance of Sprinkler Systems.
Testing
Before proceeding with any tests involving water flow, certain precautions need to be taken.
dry valve clapper will eliminate the possibility of tripping the dry valve.
2.
Close the Air Supply Control Valve.
3.
While observing the Air Pressure Gage, slowly open
the Condensate Drain Valve to bleed air from the system piping. When the low air pressure alarms sound
and/or operate, quickly close the Condensate Drain
Valve. At the same time, note the pressure reading on
the Air Pressure Gage. Record this reading.
4.
Open the Air Supply Control Valve and restore the air
pressure on the system to the proper level (see Maintenance - Air Pressure for air pressures required for
various water supply pressures).
1.
Check the location where the test connection discharges to make sure that all is clear and that there is
no possibility of the water flow causing damage or injury.
2.
Check the end of the test connection to make sure
that is is unobstructed. To obtain a satisfactory test,
there must be an unrestricted flow of water when the
test valve is wide open.
5.
3.
Check for alarm connections to a central station or
fire department. If such connections are found, give
proper notice to the signal receiving station before proceeding with the test.
Slowly open the System Control Valve. When water
starts to discharge from the main drain pipe, slowly
close the Main Drain Valve.
6.
Testing Waterflow Alarm Devices.
NFPA 25 recommends that the waterflow alarm devices
be tested quarterly.
Turn the System Control Valve to its full open position. Seal, lock or otherwise secure the valve in the
open position. The system is now ready for service.
7.
If alarms connect to a central station, notify the signal
receiving station when all tests have been completed.
On a dry system, the primary way to test this equipment is
by opening the Alarm Test Valve provided as part of the
dry valve trim. Using this valve, the alarms may be tested
without tripping the dry valve, since the supply for the alarm
test line is taken from a point below the dry valve clapper
(see Description / Operation).
Waterflow alarms may also be tested by opening the Inspectors Test Connection.
Caution: Opening the Inspectors Test Connection will
cause the dry valve to trip and thereby allow water to flow
into the system. This means of testing, therefore, should
be used only when a full flow trip test of the dry valve is to
be provided (see Trip Test - Full Flow).
Note: If alarms connect to a central station or fire department, notify the signal receiving station when all tests have
been completed.
Flow Test at Main Drain Valve (Main Drain Test).
NFPA 25 recommends that a water flow test be made quarterly from the main drain valve at the system riser. The
purpose of this test is to show whether or not the normal
water supply is available to the system. By comparing static
and residual pressure readings with those previously established, a main drain test can indicate the possible presence of closed valves or other obstructions in the supply
piping.
The procedure for conducting a Main Drain Test is as follows:
1.
With the Main Drain Valve closed, note and record
the reading on the Water Pressure Gage at the Dry
Valve.
2.
Open the Main Drain Valve slowly until it is wide open.
Then, check to make sure that a full steady flow of
water is discharging from the main drain pipe.
Testing Low-Air-Pressure Alarm Devices.
NFPA 25 recommends that the low air pressure alarm devices on a dry system be tested quarterly. This can be
accomplished as follows:
1.
Close the System Control Valve (OS&Y, PIV or other)
and open the Main Drain Valve.
Note: If a full steady stream is not discharging, check
the main drain piping further for possible obstructions.
3.
Allow the water to flow until the reading on the Water
Pressure Gage drops and stabilizes. Then, record this
reading.
Note: Relieving the water supply pressure under the
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Note: The first and higher pressure reading is the static
pressure. The second, lower reading is the residual
pressure with a given flow discharging from the main
drain pipe.
4.
Note: The valve should be kept open just enough to
permit a full flow of water at good pressure through
the main drain pipe.
4.
Slowly close the Main Drain Valve. The dry valve is
now ready for trip testing.
5.
Note and record the readings on the Air Pressure and
Water Pressure Gages.
Compare both pressure readings with previously established or normal readings.
Note: If the readings compare favorably, the water
supply may be considered satisfactory. If, however,
the pressure readings vary to any great extent, the
condition should be investigated to determine the
cause. Some possible causes are:
• Partially or totally closed system control valves.
• Clogged or frozen water mains.
• Serious leakage at valves or mains.
Note: Be prepared to again record the reading on the
air pressure gage when the dry valve trips. Also, be
prepared to note the length of time that it takes for the
valve to trip after opening the test valve.
6.
The usual procedure is to trip the dry valve with the system control valve partially open. But at least once every
three years - or whenever the system is altered - the procedure is to trip the dry valve with the system control valve
wide open. For discussion, these two test procedures are
designated, respectively, as Trip Test-Partial Flow and Trip
Test-Full Flow.
Note: If two-way communication is not available, opening of the test valve may be determined by noting when
the needle on the air pressure gage starts to move
downward.
7.
Note: Dry valves should be trip tested during warm weather,
preferably in the spring, to allow all condensate to drain
from the system piping before the onset of cold weather.
Note: Before proceeding with any trip test of a dry valve,
the water supply line to the system should be thoroughly
flushed. The system main drain may be used for this purpose; however, if there is a hydrant on the supply line, it
should be used to flush the piping before the main drain is
opened.
2.
20
Open the Main Drain Valve slowly until it is wide open.
Then, check to make sure that a full steady flow of
water is discharging from the main drain pipe.
Allow the water to flow at full pressure long enough to
clear the water supply pipe of any accumulation of
scale or foreign material.
When the Dry Valve trips, quickly note the tripping time
and the air pressure at the time the valve tripped. Then,
quickly close the System Control Valve and open the
Main Drain Valve.
Note: As a rule, quickly closing the system control
valve and opening the main drain valve keeps the water
from filling the system beyond the riser. It is good practice, however, to always check the system low points
to make sure that water did not pass beyond the system riser.
8.
Note: Assistance is required to perform certain operations
in the test procedures.
Trip Test-Partial Flow. The procedure for conducting a
partial flow trip test is as follows:
While observing the Air Pressure Gage, open the Inspectors Test Valve.
Note: This valve is part of the Inspectors Test Connection. This connection, generally located at the highest and most remote point on the system in relation to
the dry valve, consists of a test orifice and a controlIing globe valve. Opening of the globe valve (Inspectors Test Valve) simulates the operation of a sprinkler.
Trip Testing of Dry Valve.
NFPA 25 recommends that the dry valve be trip tested,
cleaned and reset at least once each year.
1.
Partially close the System Control Valve.
Close the Main Drain Valve slowly.
Caution: If alarms have been temporarily shut off, they
must be returned to service. If alarms connect to a
central station or fire department, notify the signal receiving station when the test has been completed.
5.
3.
Record the tripping time and the air pressure at the
trip point. Compare all data with previous test records.
Note: If the data differs to any great extent from that
shown in previous records, the cause should be determined and the condition corrected.
9.
Thoroughly clean the Dry Valve, renew parts as required and reset the valve (see Maintenance - Resetting the System).
Trip Test-Full Flow. The procedure for conducting a full
flow trip test is as follows:
1.
Open the Main Drain Valve slowly until it is wide open.
Then, check to make sure that a full steady flow of
SVL300
water is discharging from the main drain pipe.
2.
Allow the water to flow at full pressure long enough to
clear the water supply pipe of any accumulation of
scale or foreign material.
3.
Slowly close the Main Drain Valve. The dry valve is
now ready for trip testing.
4.
Note and record the readings on the Air Pressure and
Water Pressure Gages.
Note: Be prepared to again record the reading on
the air pressure gage when the dry valve trips. Also,
be prepared to note the length of time that it takes for
the valve to trip and the length of time that it takes for
water to reach the Inspectors Test Connection after
opening the test valve.
Tags / Records.
To comply with NFPA 25, the dry valve should be provided
with an attached tag or card which shows the date when
the valve was last tripped and the name of the person and
organization making the test. Separate records should be
kept which show the test results: initial air and water pressures, tripping time and air pressure when the valve tripped,
and water delivery time to the inspectors test connection.
The operating condition of the dry valve and other components should also be noted.
After the test, the records should be compared with those
from previous tests. If any of the data differs to any great
extent, the cause should be determined and the condition
corrected.
Maintenance
While observing the Air Pressure Gage, open the Inspectors Test Valve.
The "Automatic" Model 39 Dry Pipe Valve and its related
equipment should be examined periodically to ensure
proper operation and trouble-free service. Several areas
to be routinely inspected are:
Note: This valve is part of the Inspectors Test
Connection. This connection, generally located at
the highest and most remote point on the system in
relation to the dry valve, consists of a test orifice and
a controlling gate valve. Opening of the globe valve
(Inspectors Test Valve) simulates the operation of a
sprinkler.
Clapper Facing. The rubber clapper facing should be
checked for wear or damage, and to determine that it is
free of dirt and other foreign substances. If found to be
worn or damaged (e.g., foreign matter imbedded in the
surface), the facing should be replaced. If it is dirty, it should
be cleaned, but compounds which could damage the rubber facing must never be used.
Note: If two-way communication is not available,
opening of the test valve may be determined by
noting when the needle on the air pressure gage
starts to move downward.
Seat Rings. Both the air and the water seat rings should
be cleaned thoroughly and checked for possible damage.
If either seat ring is found to be severely damaged, the
complete dry valve assembly should be replaced.
6.
When the Dry Valve trips, quickly note the tripping time
and the air pressure at the time the valve tripped.
7.
Allow the water to flow into the system until it reaches
the Inspectors Test Connection. Note the time that it
took for the water to reach the Inspectors Test Connection after the test valve was opened.
Velocity Check Valve. The plunger should be pushed in
each time the dry valve is inspected to ensure that the ball
is free and that there is no seepage of water that could
build up in the intermediate chamber.
5.
8.
Keep the Inspectors Test Valve open until clean water
is flowing at the connection. Terminate the test by closing this valve and the System Control Valve.
9.
Record the tripping time and the air pressure at the
trip point. Also, record the time that it took for the water to reach the Inspectors Test Connection. Compare
all data with previous test records.
Note: If the data differs to any great extent from that
shown in previous records, the cause should be
determined and the condition corrected.
10. Thoroughly clean the Dry Valve, renew parts as required and reset the valve (see Maintenance - Resetting the System). Make sure that the system is
properly drained before restoring it to service.
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Accelerator. The accelerator should be cleaned and reset after each operation of the dry valve. Also, the accelerator should be tested at least twice a year. If repairs are
required which cannot be accomplished in the field, the
device should be replaced. For technical information on
the Model 1 Accelerator, see pages 12-15 or Technical Bulletin 305.
Antiflooding Device. The float ball and strainer assembly should be removed and cleaned thoroughly.
Alarm Line Strainer. The 3/4" strainer in the alarm line
should be checked and cleaned thoroughly.
Alarm Test Valve, Main Drain Valve, Inspectors Test &
Air Supply Control Valve (Manual Setup). All controlling
valves normally closed when the dry valve is in the set
position should be checked to be sure that they are fully
closed and not leaking.
21
System Control Valve, Alarm Control Valve & Air Supply Control Valve (Automatic Setup). All controlling valves
normally open when the dry valve is in the set position
should be checked to be sure that they are in the fully
open position and sealed, where required.
Dry Valve & Trim. The overall setup should be checked
for visible leaks and possible physical damage to the valve
and connections (e.g., broken gages).
Note: When difficulty in performance is experienced, a
qualified service technician or contractor should be contacted if any field adjustment or repair is attempted.
Air Maintenance Device or Automatic Control Connections. Strainers and restriction orifices should be
checked and cleaned as required. The orifice by-pass valve
should be checked to see that it is fully closed.
Air Compressor. The air compressor should be lubricated
as recommended by the manufacturer. The motor unit
should be kept free of dirt. Filters and strainers should be
cleaned as required.
Air Pressure. Air or nitrogen pressure must be maintained
on the dry system throughout the year.
Note: Dry systems should not be converted to wet systems during warm weather. To do so will cause corrosion
and accumulation of foreign matter in the system piping.
Also, when a dry system is turned wet, it is necessary to
silence the waterflow alarm. A sprinkler system should
never be without a waterflow alarm.
The table below shows the air pressure required on the
dry system for various water supply pressures.
Water Supply
Pressure
(psi)*
50
75
100
125
150
175
*
†
greater than the 10 psi (69 kPa), the system should be
checked for leaks. Excessive leaks should be promptly
repaired.
For systems with automatic control connection (air compressor or air maintenance device), the pressure should
be checked at regular intervals to see that the equipment
is functioning properly and that the required pressure is
being maintained. According to NFPA 13, the permitted
rate of air leakage is 1.5 psi (10 kPa) for a 24 hour period.
Low-air pressure alarms should be tested quarterly (see
Testing Low-Air-Pressure Alarm Devices). The switch
should be checked to see that it is properly set to operate
at 5 psi (34 kPa) below the required system pressure.
Priming Water Level. The priming water in the dry valve
should be inspected quarterly and maintained at the proper
level. Loss of water either through evaporation into the
system or by seepage past the air seat ring could result in
false operation of the valve. On the other hand, accumulation of additional water from condensation in the system
can slow down the operation of the valve.
To check the priming water, slowly open the Condensate
Drain Valve. If water discharges into the Drain Cup, the
priming water level is too high and it must be allowed to
drain away. Let the water continue to drain, but slowly.
Quickly close the Condensate Drain Valve when the water
stops flowing.
If air discharges when the Condensate Drain Valve is
opened, quickly close the valve. The priming water level
may be too low. To add priming water, proceed as follows:
1.
Close the System Control Valve and open the Main
Drain Valve. If the system has automatic air, close the
Air Supply Control Valve. If there is an accelerator,
close the Accelerator Control Valve.
2.
Open the Condensate Drain Valve and the Priming
Cup Valve to bleed off the system air pressure.
3.
Refer to Resetting the System. Prime the dry valve
per steps 10 thru 12, then repressurize the system
and restore it to service in accordance with step 14
and steps 17 thru 21, where applicabie. Also comply
with steps 24 and 25.
4.
Open the Accelerator Control Valve (if the system is
so equipped and this valve has been closed).
System
Air Pressure (psi)
Minimum
Maximum
15†
20†
25
30
35
40
25
30
35
45
50
50
The water supply pressure is the highest anticipated static pressure. If a fire pump is provided, it
is the pump shutoff pressure or relief valve pressure, whichever is greater.
When an accelerator is installed with the dry valve,
a minimum system air pressure of 25 psi is required.
Valve Enclosure. The temperature in the enclosure around
the dry valve should be maintained at a temperature above
40° F (4°C).
For systems with manual control connections, the air or
nitrogen pressure should be checked at least once a week.
When the pressure is low, it should be restored to the
proper level promptly. If the pressure loss each week is
System Low Points. Low points on the dry system should
be drained as often as required to remove any water that
has accumulated - especially before and during cold
weather. The process should be repeated daily until all
22
SVL300
water is removed. Freezing of even a small amount of water
can rupture sprinkler piping, thereby impairing the system
and causing extensive water damage to the building and
contents.
Resetting of System
After operation, the "Automatic" Model 39 Dry Pipe Valve
must be reset and the system restored to service as soon
as possible.
1.
2.
Close the Air Supply Control Valve.
3.
Open the Main Drain Valve and allow the system to
drain completely. Leave the valve open.
Note: If sprinklers have not operated, another means
of venting the piping is required to properly drain the
system. This can be accomplished by opening the
Inspectors Test Connection.
5.
6.
7.
Open the Auxiliary Drain Valves (or Outlets) at system
low points and drain completely.
At the Dry Valve, push in the plunger on the Velocity
Check Valve. Release it when water stops discharging.
Remove the Handhole Cover from the Dry Valve and
raise the Clapper to a wide open position.
Thoroughly clean all interior parts of the valve. Check
them for freedom of movement. Carefully inspect the
Clapper Facing and Seat Rings for damage.
Caution: Never use compounds or abrasives on the
clapper facing or seat rings. Use bare fingers or cloth
to remove grit deposits. Do not scar the seat ring
surfaces.
8.
Release the Clapper latch and lower the Clapper to
the Seat Rings.
Caution: Never use grease or other sealing material
on the seat rings. Do not use force on the clapper in
attempting to make the dry valve tight.
9.
11. Open the Condensate Drain Valve and remove excess
priming water from the Dry Valve. Close the Condensate Drain Valve.
12. Check the Velocity Check Valve for leakage. If there
is none, proceed with resetting the Dry Valve.
Close the System Control Valve (OS&Y, PIV or other).
Caution: In the event of a fire, the system control valve
is to be closed only after it has been determined, positively, that the fire has been extinguished.
4.
Note: To add priming water to the valve, the system
piping must be open to atmosphere - for example,
through an opened sprinkler or an open Inspectors
Test Connection.
Replace the Handhole Cover and Gasket, tightening
the Cover Bolts (Cap Screws) evenly and securely.
10. Open the Priming Cup Valve, while making sure that
the Condensate Drain Valve is closed. Prime the Dry
Valve by slowly pouring water into the Priming Cup.
Stop pouring when water remains in the cup.
SVL300
Note: Priming water must be retained in the valve
before the system can be restored to service. If
leakage is observed at the velocity check valve, the
dry valve must be reopened and reinspected. Replace the clapper facing if it is worn.
13. Replace the sprinklers which have operated and make
sure all auxiliary drains are closed.
14. Close the Inspectors Test Connection - if it has been
opened to trip or vent the system.
15. Reset the Accelerator - if the system is so equipped
(see Cleaning / Resetting of Accelerator in "Automatic"
Data Book or Technical Bulletin 301).
Note: Cleaning and resetting of the accelerator may
proceed concurrent with re-establishing the air supply on the system (Steps 16 thru 18 which follow).
16. Open the Air Supply Control Valve and admit air to the
system.
Note: It is good practice to build up the air pressure
to about 10 psi, then individually open the auxiliary
drains to force any remaining water from the system’s
low points. When dry air starts to discharge, close
the valve or outlet. Be sure to replace the plugs in all
drain valves.
17. Admit air to the system until the Air Pressure Gage
registers the required pressure - that is, until there is
sufficient air pressure to hold the Dry Valve closed
against the water supply pressure (see Maintenance
- Air Pressure for air pressures required for various
water supply pressures).
18. Again, check the Velocity Check Valve for leakage. If
there is none, proceed with resetting the system.
Note: If the Clapper Facing is tight on the Air Seat
Ring, the valve will be holding its priming water and
no leakage will be found. If leakage is observed,
however, the dry valve must be reopened and reinspected. Priming water must be retained in the valve
before the system can be restored to service.
23
19. Slowly open the System Control Valve. When water
starts to discharge from the main drain pipe, slowly
close the Main Drain Valve.
20. Turn the System Control Valve to its full open position.
21. Open the Alarm Control Valve - if it has been closed to
silence alarms. Reset the Trouble Alarm Silencing
Panel - if there are low-air-pressure alarms and they
have been silenced.
22. Conduct a Main Drain Test to make sure the water
24
supply is satisfactory (see Flow Test at Main Drain
Valve).
23. Conduct a test of the alarm devices (see Testing
Waterflow Alarm Devices).
24. Seal, lock or otherwise secure the System Control
Valve and Alarm Control Valve in an open position (per
NFPA 25). The system is now ready for service.
25. If alarms connect to a central station or fire department, notify the signal receiving station that the system has been returned to service.
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25
This information is only a general guideline. The company reserves the right to change any portion of this information without notice. Terms and
conditions of sale apply and are available on request.
2/02 Printed in USA (SLV300.PMD)
"Automatic" Sprinkler
150 Gordon Drive • Exton, PA 19341 USA
Tel: (610) 363-1400 • 800-626-2682
Fax: (610) 524-9073 • 800-858-6857