SVL500-Model F Preaction Valves.pmd
123456
Fire Protection Equipment
#SVL500 - Model F Preaction 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
Pre-Action Valve ............................................................................................................................................... 1
Air Check Valve ................................................................................................................................................ 2
Technical Data ........................................................................................................................................................ 2
Figure 1 - Operation Diagram: Model F Pre-Action Valve Set Position ............................................................. 3
Figure 2 - Operation Diagram: Model Model F Pre-Action Valve Operating Position ........................................ 3
Ordering Information .............................................................................................................................................. 4
Pre-Action Valve Trim Space Requirements ........................................................................................................ 4
"Automatic" 2-1/2” Model F Pre-Action Valve Assembly - Parts List ................................................................... 5
"Automatic" 2-1/2” Model F Pre-Action Valve Basic Trim Setup 76-DVSP-2F for Wet Pilot Operation - Parts Drawing & List ........................................... 6
"Automatic" 4” Model F Pre-Action Valve Assembly - Parts List ......................................................................... 7
"Automatic" 4” Model F Pre-Action Valve Basic Trim Setup 76-DVSP-4F for Wet Pilot Operation - Parts Drawing & List ........................................... 8
"Automatic" 6” Model F Pre-Action Valve Assembly - Parts List ......................................................................... 9
"Automatic" 6” Model F Pre-Action Valve Basic Trim Setup 76-DVSP-6F for Wet Pilot Operation - Parts Drawing & List ......................................... 10
"Automatic" Model F Pre-Action Valves - Wet Pilot Actuation ........................................................................... 11
General ........................................................................................................................................................... 11
Installation ...................................................................................................................................................... 11
Piping ............................................................................................................................................................. 11
Graph A: Wet Pilot Limitations for 2-1/2” Model F Pre-Action Valve ......................................................... 12
Graph B: Wet Pilot Limitations for 4” Model F Pre-Action Valve ............................................................... 12
Graph C: Wet Pilot Limitations for 6” Model F Pre-Action Valve .............................................................. 12
"Automatic" Model F Deluge Valves - Dry Pilot Actuation .................................................................................. 13
General ........................................................................................................................................................... 13
Graph D: Dry Pilot Actuator Pressure Curves .......................................................................................... 13
Installation ...................................................................................................................................................... 13
Piping ............................................................................................................................................................. 13
i
SVL500
Optional Alarms ............................................................................................................................................. 13
Trouble Alarm ........................................................................................................................................... 13
Fire Alarm ................................................................................................................................................. 13
"Automatic" Model B-1 Dry Pilot Actuator - Symbol 76-750 - Parts List & Drawing ......................................... 14
Dry Pilot Actuation Trim Options ......................................................................................................................... 14
Dry Pilot Actuation - Owner’s Air Supply (76-DPO) - Replacement Parts List & Drawing ............................... 14
Dry Pilot Actuation - Nitrogen Supply (76-DPN) - Replacement Parts List & Drawing .................................... 15
"Automatic" Model F Pre-Action Valves - Electric Actuation .............................................................................. 16
General ........................................................................................................................................................... 16
Installation ...................................................................................................................................................... 16
Electric Actuation Trim Option - Parts List & Drawing .............................................................................. 16
Technical Data ...................................................................................................................................................... 17
Ordering Information ............................................................................................................................................ 17
Testing and Maintenance ..................................................................................................................................... 18
Testing ............................................................................................................................................................ 18
Testing Waterflow Alarm Devices ............................................................................................................. 18
Testing Low-Air-Pressure Alarm Devices ................................................................................................. 18
Supervisory Air Pressure .......................................................................................................................... 18
Dry Pilot Actuation System ....................................................................................................................... 18
Flow Test at Main Drain Valve (Main Drain Test) ...................................................................................... 18
Testing of Pre-Action Valve ...................................................................................................................... 19
Test-Partial Flow ....................................................................................................................................... 19
Test-Full Flow ........................................................................................................................................... 19
Testing of Dry Pilot Actuation System ....................................................................................................... 20
Maintenance ................................................................................................................................................... 20
Clapper/Clapper Latch ............................................................................................................................. 20
Diaphragm Actuator .................................................................................................................................. 20
Clapper Facing ......................................................................................................................................... 21
Seat Ring .................................................................................................................................................. 21
Alarm Line Strainer, Pilot Line Strainer & Air Supply Strainers ................................................................. 21
Alarm Test Valve & Main Drain Valve ....................................................................................................... 21
System Control Valve, Alarm Control Valve, Pilot Ball Valve & Air (or Nitrogen) Supply Control Valves ... 21
Dry Pilot Actuator ...................................................................................................................................... 21
Electric Solenoid Valve ............................................................................................................................. 21
Pre-Action Valve and Trim ........................................................................................................................ 21
Air Pressure .............................................................................................................................................. 21
SVL500
ii
Priming Water Level ................................................................................................................................. 21
Valve Enclosure ........................................................................................................................................ 21
System Low Points ................................................................................................................................... 21
Resetting of System ................................................................................................................................. 21
System Pressure Test Records ........................................................................................................................... 23
iii
SVL500
123
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DATA SHEET
#SVL500
General
The "Automatic" Model F Pre-Action Valve is a water-flow
control/alarm device designed for installation in the main
supply to a pre-action system of sprinklers or nozzles. It
serves three basic functions.
First, the valve holds back the water, keeping it from flowing into the system until such time that the detection system operates (see Description/Operation).
Second, the valve provides a means to supervise the system piping. Air (or nitrogen) pressure is maintained in the
system through connections at the pre-action valve. If a
break should occur in the piping, or if a sprinkler should
operate accidentally, the loss of supervisory air is used to
indicate trouble. This is accomplished via a Iow-air-pressure alarm switch connected to an electrically operated
signaling device such as a horn.
Third, the pre-action valve provides the means to actuate
a fire alarm when water flows into the system. 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.
The Model F Pre-Action Valve is available in three sizes:
2-1/2" (63.5 mm), 4" (101.6 mm) and 6" (152.4 mm). Each
valve is provided with a basic trim package that includes
water supply connections for wet pilot actuation, manual
control connections, manual air supply and priming connections for supervision of the system piping, drain connections, alarm outlets and an alarm test by-pass. Optional
trim packages are available to provide connections for dry
pilot or electrical operation, and for automatic air or nitrogen supply for system supervision. Alarm or supervisory
devices are provided separately .
Approvals
Model F Pre-Action Valves are listed or approved by various testing and inspection organizations concerned with
product evaluation. These include:
•
•
•
Underwriters Laboratories (UL)
Factory Mutual (FM)
Underwriters Laboratories of Canada (ULC)
www.Kidde-Fire.com
MODEL F
Pre-Action Valves
The 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.
All devices are listed/approved for a maximum water working pressure (WWP) of 175 psi (1206.6 kPa or 12.1 bar),
and the valves have an operating pressure range of 20 to
175 psi.
Description/Operation
With a pre-action system, two things must happen before
water is discharged onto a fire.
First, the fire must operate the detection system and operate the pre-action valve. This action allows water to flow
into the system and fill the piping. But the water cannot be
discharged until sprinklers in the area of the fire operate.
This second action generally occurs after the water is available at the sprinklers or on its way to the area.
The Model F Pre-Action Valve has two principal parts: The
main valve to hold back the water and provide alarm connections, and a swing check valve to provide a positive
seal for supervisory air.
Pre-Action Valve. The Model F Pre-Action Valve depends
on water pressure acting on a diaphragm actuator to keep
the clapper closed against the main water supply pressure. The valve operates when the pressure in the diaphragm actuator is relieved.
In the set position (see Figure 1 on page 3), the clapper is
held closed by the clapper latch. And the latch, in turn, is
held in place by force applied to it by a push rod from the
diaphragm actuator. In the diaphragm actuator, water pressure acts on a diaphragm to hold the push rod in place
against the clapper latch.
Water pressure to the diaphragm actuator is maintained
through connections from the main water supply taken upstream from the OS&Y. These connections also supply
water pressure to a wet pilot line of sprinklers, or to a dry
pilot actuator or electric solenoid valve, depending on the
type of detection system used.
When a fire opens a pilot sprinkler or operates an electrical detector, water pressure in the pilot line is relieved.
This causes a loss of pressure in the diaphragm actuator.
And without pressure acting on the diaphragm, the push
rod cannot hold the clapper latch in place. The main water
supply pressure then forces the clapper open. Water flows
through the pre-action valve into the system piping and
through the alarm line connections to sound the water
motor alarm and/or operate the pressure-actuated alarm
switch (see Figure 2 on page 3).
Operation of the manual control station at the pre-action
valve also relieves the water pressure in the pilot line and
operates the valve.
Upon completion of each Model F Pre-Action valve installation, a partial flow or full flow test shall be conducted.
The system water pressure and the diaphragm actuator
operation pressure shall be recorded. See the System
Pressure Test Records chart at the end of this document.
Air Check Valve. The swing check valve, installed directly
above the pre-action valve, serves as an air check valve.
It has a rubber-faced clapper and, in the set position (see
Figure 1), 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
to supervise the system piping. The purpose of the priming water is to provide a positive seal to prevent air from
escaping past the clapper of the check valve and through
the alarm connections of the pre-action valve.
The purpose of the supervisory air is to ensure the integrity of piping above the air check valve on the pre-action
system. Air pressure is maintained in the system at 24
ounces per square inch. If the piping should be damaged,
or if a sprinkler should be broken or opened accidentally
causing a loss of supervisory air pressure, a trouble alarm
will be initiated via a low-air-pressure alarm switch.
Technical Data
Available Sizes: .................. • 2-1/2" (63.5 mm)
• 4" (101.6 mm)
• 6" (152.4 mm)
Inlet & Outlet: ...................... Class 125 Flanged
• FM Approved
Pressure Loss:
For use in hydraulic calculations, the pressure loss through
the pre-action and air check valves may be expressed as
equivalent feet of pipe:
• 2-1/2" Valve = 19 Ft
• 4" Valve
= 39 Ft
• 6" Valve
= 60 Ft
1 .0
(6 .9 )
6 in
. (1
5 2 .
4 m
m )
Listings & Approvals: .......... • UL Listed
2 .0
(1 3 .8 )
2 -1
/2
Installation: .......................... Vertical Only
P r e s s u r e in p s i ( k P a )
• Electric Actuation
in .
(6 3
.5
3 .0
(2 0 .7 )
• Dry Pilot Actuation
m m
)
Setup: .................................. • Wet Pilot Actuation
4 in
. (1
0 1
.6
12.1 bar)
m m
)
7 .0
(4 8 .3 )
5 .0
(3 4 .5 )
Water Working Pressure: .... 175 psi (1206.6 kPa or
0 .5
(3 .4 )
Shipping Weights:
• 2-1/2" Valve = 57 lbs
• 4" Valve
= 109 lbs
• 6" Valve
= 201 lbs
• 76-DVSP-2 Trim = 113 lbs
• 76-DVSP-4 Trim = 118 lbs
• 76-DVSP-6 Trim = 144 lbs
Conversion Factors:
• 1 inch
• 1 psi
= 25.4 millimeters (mm)
= 6.895 kilopascals (kPa)
0.0689 bar
• 1 gallon = 3.785 liters (L)
2
0 .1
(0 .7 ) 1 0 0
(3 7 9 )
2 0 0
3 0 0
(7 5 7 ) (1 1 3 6 )
F lo w
5 0 0
(1 8 9 3 )
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
SVL500
SVL500
3
"Automatic" Model F Pre-Action Valves
Ordering Information
•
"Automatic" Model F Pre-Action Valves
2-1/2" (63.5 mm) Valve
Item/Setup
Pre-Action Valve only (without trim)
Air Check Valve only (without trim)
Basic Trim Setup for Pre-Action Valve &
Air Check Valve:
Wet Pilot Actuation
Trim Options for Dry Pilot Actuation Valve (less
actuator):
Note: Dry Pilot Actuator is to be ordered
separately and in addition to the trim option.
Dry Pilot Actuation/Owner’s Air Supply – to
connect to Basic Trim Setup – for supply from
reliable source of owner’s air.
Optional: 1/2” Safety Valve for Owner’s Air
Supply*.
Dry Pilot Actuation/Nitrogen Supply – to connect
to Basic Trim Setup – for supply from nitrogen
cylinders (less cylinders).
Optional: Nitrogen Cylinder Restraints.
• 1/2” x 14-1/2” Proof Coll Chain – 2
required†.
• Missing Link – 1 required.
Dry Pilot Actuator - “Automatic” Model B-1
Trim Options for Electric Actuation – to connect to
Basic Trim Setup:
Electric Solenoid Valve – 115-120 VAC, 60 Hz
(not FM Approved).
Electric Solenoid Valve – 24 VDC.
Note: Other voltages are available on special
order. See data page on Electric Solenoid Valve.
4" (101.6 mm) Valve
6" (152.4 mm) Valve
Symbol
Number
Part
Number
Symbol
Number
Part
Number
Symbol
Number
Part
Number
76-100
-
8076100
5115008
76-500
352-400
8076500
8352400
76-900
352-600
8076900
8352600
76-DVSP-2F
1602008
76-DVSP-4F
1602009
76-DVSP-6F
1602010
76-DPSPO
1601667
76-DPSPO
1601667
76-DPSPO
1601667
5116002
5116002
5116002
76-DPSPN
1601666
76-DPSPN
1601666
76-DPSPN
1601666
79-866
1109105
79-866
1109105
79-866
1109105
109-103
76-750
1109103
1601603
109-103
76-750
1109103
1601603
109-103
76-750
1109103
1601603
134-311
5118025
134-311
5118025
134-311
5118025
134-310
5118026
134-310
5118026
134-310
5118026
-
-
Optional Alarms:
Note: Low Air Pressure Switch for supervisory
air and connections for an Alarm Switch are
included as part of the Basic Trim Setup.
Connections for Low Air (or Nitrogen) Pressure
Alarm Switch are included in the Dry Pilot
Actuation Trim Options. The Alarm Switch and
Low Air (or Nitrogen) Pressure Alarm Switche
must be ordered separately. For technical data
on “Automatic” switches, see the Electric Alarm
Devices data sheet.
* The 1/2” Safety Valve is an optional item to be provided only if required. Valve is set to operate at 55 psi.
† Fasteners required to secure one end of chain to structure must be ordered separately.
Pre-Action Valve Trim Space Requirements
Dimension
2-1/2" (63.5 mm)
4" (101.6 mm)
Valve
Valve
A
9” (228.6 mm)
B
C
6" (152.4 mm)
Valve
9” (228.6 mm)
9” (228.6 mm)
13-1/2” (242.9 mm)
14-1/2” (368.3 mm)
16-1/4” (412.7 mm)
9-3/4” (247.6 mm)
9-3/4” (247.6 mm)
11” (279.4 mm)
D
11-5/8” (295.3 mm)
14-3/4” (374.6 mm)
15-3/4” (400.0 mm)
E*
12” (304.8 mm)
12-1/2” (317.5 mm)
15” (381.0 mm)
F*
24” (609.6 mm)
24” (609.6 mm)
24” (609.6 mm)
G
20-5/8” (523.9 mm)
11-1/2” (292.1 mm)
13” (330.2 mm)
H
10” (254.0 mm)
9” (228.6 mm)
10” (254.0 mm)
J
9” (228.6 mm)
12-5/16” (312.7 mm) 18” (457.2 mm)
K
9-3/4” (247.6 mm)
10” (254.0 mm)
6-1/4” (158.7 mm)
L*
48” (1219.2 mm)
48” (1219.2 mm)
48” (1219.2 mm)
* These dimensions represent minimum recommended clearances.
4
SVL500
"Automatic" 2-1/2" Model F Pre-Action Valve Assembly
Special Note:
When a complete valve assembly is provided, the Diaphragm Actuator (21), O-Ring
(22), Stud Bolts (18) and Nuts (19) are boxed
separately and placed inside the valve for
shipment.
In the field, place the O-Ring on the Diaphragm Actuator and install hand tight only.
DO NOT WRENCH.
Parts List
•
"Automatic" 2-1/2" Model F Pre-Action Valve Assembly - Symbol No. 76-100
Item
Number
Part Name
Material
Valve Body Subassembly
Symbol
Part
Number
Number
S76-100
8076601
Cast Iron
-
-
Brass
-
-
Handhole Cover
Cast Iron
76-202
8076003
Nameplate
Aluminum
-
-
Steel
-
-
Rubber
76-241
8076025
1
Body
2
Seat Ring †
3
4
•
Drive Screws: #0 x 1/4” – 2 required
•
Handhole Gasket
5
Hex Head Cap Screws – 1/2” x 1” Long – 6 required
Steel
-
1420097
•
Handhole Cover Insert
S.S.
-
1417181
S76-303
8076331
Clapper Subassembly
6
Clapper
Bronze
76-303
8076313
7
Stop
Brass
76-204
8076005
8
Stop Spring
Bronze
76-239
1076239
9
Stop Hinge Pin
Brass
76-228
8076021
10
Clapper Facing
Rubber
76-232A
1076233
11
Facing Retaining Plate
Cast Iron
76-205
8076035
12
Clapper Face Screw 3/8” x 5/8” Long Flat Head
Brass
-
1420266
8076019
13
Hinge Pin
Brass
76-226
14
Hinge Pin Bushings (2 in Body)†
Brass
-
1/2” Plug – 2 required
Brass
15
Clapper Latch
Bronze
76-102
8076602
16
Latch Bushing†
Brass
76-225
8076018
17
Latch Hinge Pin
S.S.
76-110
8076110
18
Stud Bolts – 5/8” x 2-1/4” long – 2 required
Steel
-
1402361
19
Hex Nuts – 5/8” – 2 required
Steel
-
1600749
20
1/4” Plug
Cast Iron
-
2016102
21
1-3/4” Diaphragm Actuator
-
76-103
8076603
22
O-Ring – 0.614” I.D. x 0.75” O.D.
Rubber
-
1419236
•
2096103
• Items are not shown in detail.
† These items are not field replaceable.
SVL500
5
"Automatic" 2-1/2" Model F Pre-Action Valve
Basic Trim Setup 76-DVSP-2F
for Wet Pilot Operation
6
SVL500
"Automatic" 4" Model F Pre-Action Valve Assembly
Special Note:
When a complete valve assembly is provided, the Diaphragm Actuator (20), O-Ring
(21), Stud Bolts (17) and Nuts (18) are boxed
separately and placed inside the valve for
shipment.
In the field, place the O-Ring on the Diaphragm Actuator and install hand tight only.
DO NOT WRENCH.
Parts List
•
"Automatic" 4" Model F Pre-Action Valve Assembly - Symbol No. 76-500
Item
Number
Part Name
Material
Symbol
Part
Number
Number
S76-500
8076501
Cast Iron
-
-
Seat Ring †
Brass
-
-
3
Handhole Cover
Cast Iron
76-402
8076402
•
Nameplate
Aluminum
-
-
•
Drive Screws: #0 x 1/4” – 2 required
Steel
-
-
Rubber
76-441
8076441
Valve Body Subassembly
1
Body
2
•
Handhole Gasket
4
Hex Head Cap Screws – 5/8” x 1-1/2” Long – 6 required
Steel
-
1420113
•
Handhole Cover Insert
S.S.
-
1417181
S76-403
8076413
Clapper Subassembly
5
Clapper
Bronze
76-403
8076403
6
Stop
Brass
76-404
8076404
7
Stop Spring
Bronze
76-439
1076439
8
Stop Hinge Pin
Brass
-
1417168
9
Clapper Facing
Rubber
76-432
1076432
10
Facing Retaining Plate
Cast Iron
76-405
8076405
11
Clapper Face Screw 1/2” x 1” Long Hex Head
Bronze
-
1420694
8076426
12
Hinge Pin
Brass
76-426
13
Hinge Pin Bushings (2 in Body)†
Brass
-
3/4” Plug – 2 required
Brass
14
Clapper Latch
Bronze
76-502
8076502
15
Latch Bushing†
Bronze
76-425
1076425
16
Latch Hinge Pin
Bronze
76-427
8076427
17
Stud Bolts – 5/8” x 2-3/4” long – 2 required
Steel
-
1402363
18
Hex Nuts – 5/8” – 2 required
19
1/4” Plug
20
2” Diaphragm Actuator
21
O-Ring – 0.796” I.D. x 1.075” O.D.
•
2096104
Steel
-
1600749
Cast Iron
-
2016102
-
76-503
8076503
Rubber
-
1419144
• Items are not shown in detail.
† These items are not field replaceable.
SVL500
7
"Automatic" 4" Model F Pre-Action Valve
Basic Trim Setup 76-DVSP-4F
for Wet Pilot Operation
8
SVL500
"Automatic" 6" Model F Pre-Action Valve Assembly
Special Note:
When a complete valve assembly is provided, the Diaphragm Actuator (22), O-Ring
(23), Stud Bolts (19) and Nuts (20) are boxed
separately and placed inside the valve for
shipment.
In the field, place the O-Ring on the Diaphragm Actuator and install hand tight only.
DO NOT WRENCH.
Parts List
•
"Automatic" 6" Model F Pre-Action Valve Assembly - Symbol No. 76-900
Item
Number
Part Name
Material
Valve Body Subassembly
Symbol
Part
Number
Number
S76-900
8076901
Cast Iron
-
-
Seat Ring †
Brass
-
-
Stud Bolt – 3/4” x 2-3/8” Long
Steel
-
1402367
1
Body
2
3
4
Handhole Cover
Cast Iron
76-602
8076102
5
Nameplate
Aluminum
-
-
•
Drive Screws: #0 x 1/4” – 2 required
Steel
-
-
Rubber
76-641
8076141
•
Handhole Gasket
6
Hex Head Cap Screws – 3/4” x 1-1/2” Long – 7 required
Steel
-
1420123
•
Handhole Cover Insert
S.S.
-
1417181
S76-703
8076715
Clapper Subassembly
7
Clapper
Bronze
76-703
8076713
8
Stop
Bronze
76-604B
8076104
9
Stop Spring
Bronze
76-639
1076639
10
Stop Hinge Pin
Brass
76-628
8076128
11
Clapper Facing
Rubber
76-632C
1076645
12
Facing Retaining Plate
Cast Iron
76-605A
8076105
13
Clapper Face Screw 1/2” x 7/8” Long Hex Head
Bronze
-
1420693
8076126
14
Hinge Pin
Brass
76-626
15
Hinge Pin Bushings (2 in Body)†
Brass
-
-
3/4” Plug – 2 required
Brass
-
2096104
16
Clapper Latch
Bronze
76-902
8076902
17
Latch Bushing†
Brass
76-911
8076911
18
Latch Hinge Pin
Bronze
76-910
8076910
19
Stud Bolts – 3/4” x 3” long – 2 required
Steel
-
1402371
20
Hex Nuts – 3/4” – 3 required
21
1/4” Plug
22
3” Diaphragm Actuator
23
O-Ring – 1.375” I.D. x 1.625” O.D.
•
Steel
-
1600750
Cast Iron
-
2016102
-
76-903
8076903
Rubber
-
1419198
• Items are not shown in detail.
† These items are not field replaceable.
SVL500
9
"Automatic" 6" Model F Pre-Action Valve
Basic Trim Setup 76-DVSP-6F
for Wet Pilot Operation
10
SVL500
"Automatic" Model F Pre-Action Valves - Wet Pilot Actuation
General
The basic trim setup for the "Automatic" Model F Pre-Action Valve is for wet pilot actuation. The basic detection
system, therefore, is the wet pilot line of sprinklers. This
system consists of standard automatic fixed-temperature
sprinklers (1/2" orifice x 1/2" NPT) spaced throughout the
protected area and connected to the pre-action valve by
means of pilot line piping either 1/2" or 3/4" in size, depending on the requirements for the particular installation.
Water pressure is maintained in the pilot line through a
restricted connection from the main water supply which is
taken upstream of the System Control Valve.
Example: Including a rise of 50 ft., the distance from the
most remote 1/2" orifice pilot sprinkler back to the 2-1/2"
pre-action valve is 350 ft. The water supply pressure at
the valve is 100 psi. The designer must determine if an
installation with a 1/2" wet pilot line is within the length/
height/pressure limitations set for the valve.
When a sprinkler operates, the flow through the open sprinkler is at a rate greater than that which can pass through
the orifice restriction in the water supply connections. This
causes a drop in the pilot line pressure. And with this drop
in pressure, the diaphragm actuator can no longer hold
the clapper latch in place. The pre-action valve operates
and water flows into the system (see Description/Operation).
Operation of the manual control station at the pre-action
valve also relieves the water pressure in the pilot line and
operates the valve.
Note: Wet pilot lines are not to be installed in areas
subject to freezing temperatures.
Installation
Wet pilot lines for 2-1/2", 4" and 6" Model F Pre-Action
Valves are to be installed within the limitations shown on
Graphs A, B and C on page 12.
The curves on each graph show the maximum length of
1/2" pilot piping that may be provided with the pre-action
valve in relation to the height of the pilot line above the
valve and the water supply pressure at the valve. The limitations are shown for pressures up to 175 psi, the maximum water working pressure of the Model F Pre-Action
Valves.
The length/height/pressure relationship of the pilot line,
pilot sprinkler and water supply is one of hydraulics. The
curves on Graph A, B and C are based on a 1/2" pilot line.
If the size of the line is increased to 3/4", the lengths shown
on each graph may be increased by a factor of 4.
SVL500
Referring to the 350 ft. curve on Graph A, the designer
finds that the height limitation is approximately 30 ft. for a
100 psi supply pressure. Since the pilot sprinklers must
be at an elevation of 50 ft., it is obvious that a 1/2" pilot
line cannot be used. The designer must now determine if
a 3/4" pilot line will be satisfactory.
On Graph A, moving up the vertical line at 100 psi until it
intersects with the horizontal one for 50 ft., the designer
finds the point to be between two curves. Interpolating, he
determines that for this height and pressure a 1/2" pilot
line may have a length of approximately 235 ft. It is obvious, then, that a 3/4" pilot line can be used, since multiplying the 235 ft. length by the factor of 4 gives a value well
above the 350 ft. length involved. In other words, an installation can be provided with 3/4" pilot line piping up to
940 ft. long when the pilot sprinklers are located at a height
50 ft. above the pre-action valve.
Piping
Pilot line pipe may be 1/2" (or 3/4") steel or copper. If steel
pipe is used, it must be galvanized.
Fittings used with steel pipe may be cast iron or malleable
iron. Fittings need to be galvanized only when required
because of external conditions.
11
"Automatic" Model F Pre-Action Valves
Graph A: Wet Pilot Limitations for 2-1/2" Model F Pre-Action Valve
1 0 0 (3 0 .5 )
P ilo t L in e H e ig h t in F e e t (M )
9 0 (2 7 .4 )
M a x im u m E q u iv a le n t L e n g th o f 1 /2 "
P ilo t L in e w ith 1 /2 " P ilo t S p r in k le r s *
8 0 (2 4 .4 )
0
2 0
7 0 (2 1 .3 )
F
0
2 5
6 0 (1 8 .3 )
5 0 (1 5 .2 )
4 0 (1 2 .2 )
)
.2 M
(1 5
F t.
5 0
3 0 (9 .1 )
2 0 (6 .1 )
(6
t.
F
(7
t.
0
1 .
)
M
2
6 .
)
M
2
6 .4
( 79 1
)
mM
M
.
.7
F t
0
0 6
M
23 50
(1
9.
tF .
2 1
0
(1
3 5
tF .
7
0
1 3
4 0
. (
F t 0 0
0
5
4 5
5 5
)
0
6 0
)
M )
2 .4
)
1( 5
6 M
.
F t 1 6 7 .
(
.
t
0 F
M )
.9
8 2
1
(
F t.
.2
M
)
1 0 (3 .0 )
0
2 0
(1 3 8 )
0
4 0
(2 7 6 )
6 0
(4 1 4 )
8 0
(5 5 2 )
1 0 0
(6 9 0 )
1 2 0
(8 2 7 )
1 4 0
(9 6 5 )
1 6 0
1 7 5
(1 1 0 3 ) (1 2 0 7 )
W a te r S u p p ly P r e s s u r e in P S I (k P a )
P ilo t L in e H e ig h t in F e e t (M )
Graph B: Wet Pilot Limitations for 4" Model F Pre-Action Valve
7 0 (2 1 .3 )
6 0 (1 8 .3 )
M a x im u m E q u iv a le n t L e n g th o f 1 /2 "
P ilo t L in e w ith 1 /2 " P ilo t S p r in k le r s *
5 0 (1 5 .2 )
2 M )
. (1 5 .
5 0 F t
4 0 (1 2 .2 )
5 M )
t. (3 0 .
1 0 0 F
3 0 (9 .1 )
1 .0 M )
2 0 0 F t. (6
2 0 (6 .1 )
3 0 0 F t. (9 1 .4 M )
1 0 (3 .0 )
0
2 0
(1 3 8 )
0
4 0
(2 7 6 )
6 0
(4 1 4 )
8 0
(5 5 2 )
1 0 0
(6 9 0 )
1 2 0
(8 2 7 )
1 4 0
(9 6 5 )
1 6 0
1 7 5
(1 1 0 3 ) (1 2 0 7 )
W a te r S u p p ly P r e s s u r e in P S I (k P a )
P ilo t L in e H e ig h t in F e e t (M )
Graph C: Wet Pilot Limitations for 6" Model F Pre-Action Valve
7 0 (2 1 .3 )
6 0 (1 8 .3 )
5 0 (1 5 .2 )
M a x im u m E q u iv a le n t L e n g th o f 1 /2 "
P ilo t L in e w ith 1 /2 " P ilo t S p r in k le r s *
F
7 5
4 0 (1 2 .2 )
1 5 0
M )
5 .2
t. (1
F
5 0
3 0 (9 .1 )
2 0 (6 .1 )
2 5 0
(3
M )
F t.
2 .9
1 0 0
t. (2
)
.7 M
F
(4 5
2 0 0
F t.
)
M
6 .2
F t. (7
t.
3 0 0 F
M )
0 .5
M )
1 .0
t. (6
M )
(9 1 .4
7 M )
. (1 0 6 .
3 5 0 F t
1 0 (3 .0 )
0
0
2 0
(1 3 8 )
4 0
(2 7 6 )
6 0
(4 1 4 )
8 0
(5 5 2 )
1 0 0
(6 9 0 )
1 2 0
(8 2 7 )
1 4 0
(9 6 5 )
1 6 0
1 7 5
(1 1 0 3 ) (1 2 0 7 )
W a te r S u p p ly P r e s s u r e in P S I (k P a )
* If the size of the pilot line is increased to 3/4”, the lengths shown on each graph may be increased by a factor of 4.
12
SVL500
"Automatic" Model F Pre-Action Valves - Dry Pilot Actuation
General
An optional actuation setup for the "Automatic" Model F
Pre-Action Valve is for dry pilot actuation. With this setup,
the detection system is the dry pilot line of sprinklers.
Suitable for installation in areas subject to freezing temperatures, the dry pilot detection system consists of standard automatic fixed-temperature sprinklers (1/2" orifice x
1/2" NPT) spaced throughout the protected area and connected to a dry pilot actuator at the pre-action valve by
means of 1/2" pilot line piping. The system is pressurized
with either compressed air or nitrogen.
When a sprinkler operates, the air or nitrogen pressure in
the pilot line is released. This relieves the pressure on the
dry pilot actuator, allowing it to open and relieve the water
pressure in connections at the pre-action valve.
Water pressure to the dry pilot actuator and on the diaphragm actuator is maintained through a restricted connection from the main water supply. When the dry pilot
actuator opens, the flow to drain is at a rate greater than
that which can pass through the orifice restriction. This
causes a drop in the water pressure and with this drop in
pressure, the diaphragm actuator can no longer hold the
clapper latch in place. The pre-action valve operates and
water flows into the system (see Description/Operation).
Operation of the manual control station at the pre-action
valve also relieves the water pressure and operates the
valve.
P ilo t L in e A ir P r e s s u r e in P S I (k P a )
Graph D shows the air pressure (or nitrogen pressure) to
be maintained in the dry pilot line for water pressures up
to 175 psi (see upper curve). The graph also shows the air
pressure at which the dry pilot actuator operates in relation to the water supply pressure (see lower curve). The
difference between the two curves indicates the pressure
drop required for operation of the actuator.
4 0
(2 7 6 )
Installation
The dry pilot detection system for the Model F Pre-Action
Valve is very similar to the piping in a dry pipe system in
that it consists of lines of sprinklers containing air under
pressure. It should be installed and tested, therefore, in a
manner similar to that required for a dry pipe system (see
NFPA 13).
There are two trim options for dry pilot actuation - one for
owner’s air supply and another for supply from nitrogen
cylinders.
The trim option for owner’s air is based on the supply being from a reliable source. If any other device or equipment is required (a drum drip or air tank, for example) it
must be provided separately. The trim option setup does
include an outlet for a safety valve which may be ordered
as an optional item.
The trim option for nitrogen supply does not include the
nitrogen cylinders. These must be provided separately.
Fasteners to secure them to the building structure can be
ordered as optional items.
For air or nitrogen pressures to be maintained in the dry
pilot line for various water supply pressures (up to 175
psi), refer to Graph D.
Piping
Pilot line pipe may be 1/2" steel or copper. If steel pipe is
used, it must be galvanized.
Fittings used with steel pipe may be cast iron or malleable
iron. Fittings need to be galvanized only when required
because of external conditions.
Optional Alarms
A pressure switch may be added to the dry pilot detection
system to (1) sound a trouble alarm on loss of air or nitrogen pressure from the system and/or (2) to sound a fire
alarm when there is a substantial loss of system pressure,
as when a pilot sprinkler operates. An outlet for the optional switch is provided in each trim option for dry pilot
actuation.
s s u re
n e P re
P ilo t L i
3 0
(2 0 7 )
2 0
(1 3 8 )
re
g P re s s u
O p e r a tin
A c tu a to r
1 0
(6 9 )
0
0
2 5
(1 7 2 )
5 0
(3 4 5 )
7 5
(5 1 7 )
1 0 0
(6 8 9 )
1 2 5
(8 6 2 )
1 7 5
1 5 0
(1 0 3 4 ) (1 2 0 7 )
W a te r S u p p ly P r e s s u r e in P S I (k P a )
Graph D: Dry Pilot Actuator Pressure Curves
Example: The water supply pressure at the pre-action
valve is 100 psi. The designer must determine the pilot
line pressure to be maintained. Referring to the upper curve
on Graph D, the designer finds that a pilot line pressure of
approximately 31 psi is required for a water supply pres-
SVL500
sure of 100 psi. He also notes that the dry pilot actuator
will operate when the pilot line pressure reaches 15 psi (a
drop of approximately 16 psi).
For technical data on "Automatic" pressure switches, see
Electric Alarm Devices data sheet.
Trouble Alarm. The pressure switch used to signal low air
pressure is to be set to indicate trouble (e.g., sound a
trouble horn) on a loss of 6 psi in pilot line pressure.
Fire Alarm. The pressure switch used to signal operation
of a pilot sprinkler is to be set to actuate a fire alarm (e.g.
sound a bell) on a loss of 15 psi in pilot line pressure.
13
"Automatic" Model F Pre-Action Valves
"Automatic" Model B-1 Dry Pilot Actuator - Symbol 76-750 - Parts List
Item
No.
1
2
3
4
5
6
7
8
9
10
Part Name
Housing Assembly
Actuator Body
Actuator Cover
Hex Head Cap Screws –
5/16” x 1” Long – 8 required
Hex Nuts
5/16” – 8 required
Diaphragm /Valve Mechanism
Diaphragm
Diaphragm Plate
Seat Ring
Guide
Disc
Spring
Symbol
No.
Part
No.
76-742
76-743
1601619
1601620
-
1420055
-
1600746
76-744
76-745
76-746
76-747
76-748
76-749
1601621
1601622
1601623
1601624
1601625
1601626
Dry Pilot Actuation Trim Options
Dry Pilot Actuation - Owner’s Air Supply (76-DPSPO)
14
SVL500
"Automatic" Model F Pre-Action Valves
Dry Pilot Actuation Trim Options
Dry Pilot Actuation - Nitrogen Supply (76-DPSPN)
SVL500
15
"Automatic" Model F Pre-Action Valves - Electric Actuation
General
An optional actuation setup for the "Automatic" Model F
Pre-Action Valve is for electric actuation. With this setup,
the detection system is an electric fire detection system.
Water pressure to the electric solenoid valve and on the
diaphragm actuator is maintained through a restricted connection from the main water supply. When the electric solenoid valve opens, due to a signal from an electric control
panel, the flow to drain is at a rate greater than that which
can pass through the orifice restriction. This causes a drop
in the water pressure at the diaphragm actuator and with
this drop in pressure, the diaphragm actuator can no longer
hold the clapper latch in place. The pre-action valve operates and water flows into the system (see Description/
Operation).
Operation of the manual control station at the pre-action
valve also relieves the water pressure and trips the valve.
Installation
The electric solenoid valve is installed into the basic preaction trim as shown in the illustration below.
Electric Actuation Trim Option
Note:
16
Items 2 through 6 are included with the basic trim set-up for the Model F Preaction Valve.
Refer to print 76-DVSP-2F, 76-DVSP-4F or 76-DVSP-6F for bill of material.
SVL500
Electric Solenoid Valves
Technical Data
For AC Service: .................. • 110 VAC, 50 Hz
• 120 VAC, 60 Hz
Water Working Pressure: .... 175 psi (1206.6 kPa or
12.1 bar) - Normally Closed
For DC Service: .................. •
•
•
•
Listings: ............................... • UL Listed for fire
protection service
24 VDC
120 VDC
125 VDC
250 VDC
Ordering Information
•
"Automatic" Solenoid Valves
Model
No.
Voltage
NEMA
Symbol
Part
Wattage
Rating
Number
Number
73218BN4UNLVN0C111P3
120 VAC, 60 Hz – 110 VAC, 50 Hz
10
1, 2, 3, 3S, 4 & 4X
134-311
5118025
73218BN4UNLVN0C111C2
24 VDC
10
1, 2, 3, 3S, 4 & 4X
134-310
5118026
73218BN4UNLVN0C111C6
120 VDC
10
1, 2, 3, 3S, 4 & 4X
134-312†
-
73218BN4UNLVN0C111N9
250 VDC
10
1, 2, 3, 3S, 4 & 4X
134-313†
-
120 VAC, 60 Hz – 110 VAC, 50 Hz
16.7
1, 2, 3, 3S, 4 & 4X
134-316
5118029
24 VDC
16.8
1, 2, 3, 3S, 4 & 4X
134-315
5118030
8210A107
125 VDC
26.6
1, 2, 3, 3S, 4 & 4X
134-317†
-
250 VDC
26.6
1, 2, 3, 3S, 4 & 4X
134-318†
-
Note: Solenoid valves suitable for installation in areas requiring explosion-proof equipment are available on special order.
† These switches are non-stock items and are available on special order.
SVL500
17
Testing and Maintenance
Reference
NFPA 25, Recommended Practice for the Inspection, Testing and Maintenance of Sprinkler Systems
Note: It is not necessary to close the air supply
control valve. Because of the restriction provided in
the air supply line, the air pressure will be lost
through the priming cup valve at a rate greater than
it can be replaced.
Testing
Before proceeding with any test involving water flow, certain precautions need to be taken.
1.
2.
3.
2.
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.
Check the end of the test connection to make sure
that it is unobstructed. To obtain a satisfactory test,
there must be an unrestricted flow of water when the
test valve is wide open.
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.
Testing Waterflow Alarm Devices
NFPA 25 recommends that the waterflow alarm devices
be tested quarterly.
For a system using the Model F Pre-Action Valve, the primary way to test this equipment is by first closing the Alarm
Control Valve, then opening the Alarm Test Valve. These
two valves, provided as part of the pre-action valve trim,
must be operated in this sequence to keep water from
entering the system. The waterflow devices can be tested
without operating the system, since the water supply for
the alarm test line is taken from a point below the preaction valve clapper (see Description/Operation).
Waterflow alarms may also be tested by operating the preaction valve and allowing water to flow into the system.
This means of testing, however, should be used only when
a full flow test of the valve is required.
Caution: If alarms connect to a central station or fire department, notify the signal receiving station when all tests
have been completed.
Note: The switch should be set to operate at approximately 8 ounces (3.5 kPa).
3.
If all devices perform satisfactorily, restore the supervisory air pressure on the system to the proper level
(see Maintenance - Air Pressure).
4.
If alarms connect to a central station, notify the signal
receiving station when all tests have been completed.
Dry Pilot Actuation System. See separate discussion:
Testing of Dry Pilot Actuation System on page 20.
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 obstruction 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 PreAction 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.
Note: If a full steady stream is not discharging,
check the main drain piping further for possible
obstructions.
Testing Low-Air-Pressure Alarm Devices
The low-air-pressure alarm devices on a pre-action system should be tested at least semi-annually.
Supervisory Air Pressure. The low-air-pressure alarm
switch and connected alarms may be tested as follows:
1.
18
While observing the Air Pressure Gage, slowly open
the Priming Cup Valve to bleed supervisory air from
the system piping.
When the low-air-pressure alarms sound and/or operate, quickly close the Priming Cup Valve. At the same
time, note the pressure reading on the Air Pressure
Gage.
3.
Allow the water to flow until the reading on the Water
Pressure Gage drops and stabilizes. Then, record this
reading.
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.
SVL500
4.
5.
Close the Main Drain Valve slowly.
3.
Slowly close the Main Drain Valve.
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.
4.
Close the System Control Valve, then open it just
slightly until there is enough pressure to raise the clapper to a stopped position when the valve is operated.
The pre-action valve is now ready for testing.
Compare both pressure readings with previously established or normal readings.
5.
At the Manual Control Station, pull the handle to open
the enclosing box, then pull the interior operating lever down. Water should discharge from the drain tubing to relieve the pressure in the diaphragm actuator
line and operate the pre-action valve.
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.
Testing of Pre-Action Valve
NFPA 25 recommends that the pre-action valve be inspected and tested at least annually. It is recommended
that the pre-action valve be inspected and tested on a
quarterly, semi-annual, or annual basis depending on the
ambient conditions present at the valve installation. More
frequent inspection and testing may be required if the water supply or ambient conditions are unusually corrosive,
or of such a nature as to have an adverse effect on the
operation of the valve or fire protection system.If the valve
is used as a foam companion valve, the valve should be
tested at least quarterly.
Note: The pre-action valve may also be tested by
opening the test valve on the pilot line to simulate the
operation of a pilot sprinkler or by applying heat to an
electrical detector.
6.
When the pre-action valve operates, quickly close the
System Control Valve and open the Main Drain Valve.
7.
Record the system water pressure and the diaphragm
actuator pressure at which the valve operated. Compare this data with initial installation test records.
Note: If the diaphragm actuator operating pressure
exceeds plus or minus 20% of the operating pressure recorded at initial valve installation, the cause
should be determined and the condition corrected
(See Maintenance).
8.
The usual procedure is to operate the pre-action valve without permitting a full flow of water into the system. But periodically, as recommended by the Authority Having Jurisdiction, a full flow test should be provided to check the complete function of the system. These two test procedures
are designated, respectively, as Test-Partial Flow and TestFull Flow.
Test - Full Flow. The procedure for testing the pre-action
valve with a full flow of water is as follows:
1.
Open the Main Drain Valve until it is wide open. Then,
check to make sure that a steady full flow of water is
discharging from the main drain pipe.
2.
Allow the water to flow at full pressure long enough to
clear the water of any scale or foreign material.
3.
Slowly close the Main Drain Valve.
4.
At the Manual Control Station, pull the handle to open
the enclosing box, then, while watching the diaphragm
actuator gage, slowly pull the interior operating lever
down. Water should discharge from the drain tubing
to relieve the pressure in the diaphragm actuator line
and operate the pre-action valve.
Note: Pre-action valves should be tested during warm
weather.
Note: Before proceeding with any test of a pre-action 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.
Test - Partial Flow. The procedure for testing the pre-action valve without a full flow of water is as follows:
1.
2.
Open the Main Drain Valve slowly until it is wide open.
Then, check to make sure that a steady full flow of
water is discharging from the main drain pipe.
Allow the water to flow at full pressure long enough to
clear the water of any accumulation of scale or foreign material.
SVL500
Thoroughly clean the pre-action valve and diaphragm
actuator, renew parts as required and reset the valve
(see Resetting of System).
Note: The pre-action valve may also be tested by
opening the test valve on the pilot line to simulate the
operation of a pilot sprinkler or by applying heat to an
electrical detector.
19
5.
Record the system water pressure and the diaphragm
actuator pressure at the time the valve operated. Compare this data with installation test records.
Note: If the diaphragm actuator operating pressure
exceeds plus or minus 20% of the operating pressure recorded at initial valve installation, the cause
should be determined and the condition corrected
(See Maintenance).
6.
7.
8.
full open when the Pressure Gage indicates a steady
pressure.
Note: Refer to the Dry Pilot Actuator Pressure Curves
for pilot line air pressure setting required for the
particular water supply pressure.
8.
After the pre-action valve operates, allow the water to
flow into the system and discharge at the sprinklers or
nozzles. Then, check for proper coverage of the protected area.
When the flow test is complete, close the System Control Valve and open the Main Drain Valve.
After draining the system, thoroughly clean the preaction valve and diaphragm actuator, renew parts as
required and reset the valve (see Resetting of System).
Slowly open the Pilot Line Ball Valve and restore water pressure on the Diaphragm Actuator and Dry Pilot
Actuator. Then, check to be sure that the Clapper Latch
is properly engaged on the Pre-Action Valve Clapper.
Note: If the dry pilot actuator should fail to reset,
remove it from service and check for obstructions.
Clean the device and replace parts as necessary.
9.
Slowly open the System Control Valve. When water
starts to discharge from the main drain pipe, slowly
close the Main Drain Valve.
10. Seal, lock or otherwise secure the System Control
Valve in a full open position (per NFPA 25). The system is now ready for service.
Testing of Dry Pilot Actuation System
The dry pilot actuator, pressure switch and related equipment should be inspected and tested at least annually.
The following procedure is recommended.
11. If alarms connect to a central station or fire department, notify the signal receiving station that the system has been returned to service.
1.
Close the System Control Valve and open the Main
Drain Valve.
Maintenance
2.
Close the Air (or Nitrogen) Supply Control Valve.
3.
Check the operation of the Pressure Switch and Dry
Pilot Actuator by slowly opening the Inspectors Test
Valve to bleed air (or nitrogen) from the actuation system.
Note: The pressure switch should operate to sound
a trouble alarm when the dry pilot line pressure
drops by 6 psi. With continued loss of pressure, the
dry pilot actuator should operate and allow water to
discharge to the drain.
Note: If the dry pilot actuator should fail to operate,
remove it from service and check for obstructions.
Clean the device and replace parts as necessary.
4.
Close the Inspectors Test Valve and Pilot Line Ball
Valve.
5.
Inspect the Pilot Line Strainer. If necessary, clean the
strainer.
6.
Check all low points on the dry pilot line and drain any
accumulated condensate. Purge the line if any foreign
material is found.
7.
To place the actuation system back in service, slowly
open the Air Supply Control Valve. Turn the valve to
20
It is recommended that the Model F Pre-Action Valve be
inspected and tested on a quarterly, semi-annual, or annual basis, depending on the ambient conditions present
at the valve installation. More frequent inspection and testing may be required if the water supply or ambient conditions are unusually corrosive, or of such a nature as to
have an adverse effect on the operation of the valve or fire
protection system. Several areas to be routinely inspected
are:
Clapper/Clapper Latch. After each test, inspection, or before resetting, inspect the clapper and clapper latch mating surfaces. These surfaces must be smooth. Inspect the
surface on the end of the latch against which the shaft of
the diaphragm actuator presses to hold the clapper closed.
This surface must also be smooth. Refinish the clapper
nose and clapper latch tail surface using 220 grit sandpaper followed by crocus cloth, to obtain a smooth finish.
Clean these surfaces with laquer thinner and allow the
surfaces to dry.
Inspect the clapper facing, then reinstall the clapper and
clapper latch in the valve.
Diaphragm Actuator. The diaphragm actuator must be
kept free of all foreign matter that could impair its operation. After removing the diaphragm actuator from the valve
body, check that the piston stem of the diaphragm actuator is free to move to both ends of its stroke. Flush out any
debris inside the diaphragm actuator. If repairs are needed
which cannot be accomplished in the field, the device
SVL500
should be replaced.
Clapper Facings. The rubber clapper facings in the preaction and air check valves should be checked for wear or
damage, and to determine that they are free of dirt and
other foreign substances. If found to be worn or damaged
(e.g. foreign matter embedded in the surface), the facings
should be replaced. If dirty, they should be cleaned, but
compounds which could damage a rubber facing must
never be used.
Seat Ring. The seat rings in the pre-action and air check
valves should be cleaned thoroughly and checked for damage. If found to be damaged, the complete valve assembly should be replaced.
Alarm Line Strainer, Pilot Line Strainer & Air Supply
Strainers. The strainers in the alarm line, pilot line and air
supplies should be checked and cleaned thoroughly.
Alarm Test Valve & Main Drain Valve. All controlling
valves normally closed when the pre-action valve is in the
set position should be checked to be sure that they are
fully closed and not leaking.
System Control Valve, Alarm Control Valve, Pilot LIne
Ball Valve & Air (or Nitrogen) Supply Control Valves.
All controlling valves normally open when the pre-action
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 Pilot Actuator. The dry pilot actuator must be kept
free of all foreign matter that could impair its operation. It
should be checked periodically for proper operation and
then cleaned as required. If repairs are needed which cannot be accomplished in the field, the device should be replaced.
Valve Enclosure. The temperature in the enclosure around
the pre-action valve should be maintained at a temperature above 40°F (4°C).
System Low Points. Low points on the pre-action 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
water is removed. Freezing of even a small amount of water
can rupture sprinkler piping.
Note: When difficulty in performance is experienced, a
qualified service technician or contractor should be contacted before any field adjustment or repair is attempted.
Resetting of System
After operation, the "Automatic" Model F Pre-Action Valve
must be reset and the system restored to service as soon
as possible.
1.
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.
2.
Open the Main Drain Valve and the Auxiliary Drain
Valve on the Air Check Valve and allow the system to
drain completely. Leave both valves open.
Note: If sprinklers have not operated, a means of
venting is required to properly drain the system.
3.
Close the Supervisory Air Supply Control Valve.
4.
Close the Ball Valve in the water supply to the pilot
line connections. If a Dry Pilot Actuator is used, also
close the Air Supply Control Valve.
Electric Solenoid Valve. The electric solenoid valve
should be checked periodically for proper operation.
5.
Open the Auxiliary Drain Valves at system low points
and drain completely.
Pre-Action Valve & Trim. The overall setup should be
checked for visible leaks and possible physical damage to
the valve and connections (e.g., broken gages).
6.
If the Pre-Action Valve operated automatically, restore
the actuation system to service.
Wet Pilot Actuation. Replace the sprinklers that operated.
Air Pressure. Air or nitrogen pressure must be maintained
in the system at 24 (10 kPa) ounces per square inch for
supervision of the system piping.
Low-air-pressure alarms should be tested at least semiannually (see Testing of Low-Air-Pressure Alarm Devices).
The switch should be checked to see that it is properly set
to operate at approximately 8 ounces (3.5 kPa) below the
required system pressure.
Priming Water Level. The priming water in the air check
valve should be checked at least semi-annually and maintained at a proper level.
SVL500
Dry Pilot Actuation. Replace the sprinklers that operated and restore air pressure to the dry pilot line.
Electric Actuation. Reset the detection devices and/
or control panel.
7.
If the Pre-Action Valve was operated from the Manual
Control Station, reset the station as follows: Push the
operating lever up, close the hinged cover and insert
a new break rod in the small hole through the top of
the enclosing box.
21
8.
Remove the handhole cover from the pre-action valve
and raise the clapper to a wide open position.
9.
Thoroughly clean all interior parts of the valve, including the diaphragm actuator. Check them for freedom
of movement. Carefully inspect the Clapper Facing and
Seat Ring for damage.
Caution: Never use compounds or abrasives on the
clapper facing or seat ring. Use bare fingers or cloth
to remove grit deposits. Do not scar the seat ring
surfaces.
10. Release the Clapper Stop and lower the Clapper to
the Seat Ring.
Caution: Never use grease or other sealing material
on the seat rings.
11. Holding the Clapper down, bring the Clapper latch up
into position by opening the Ball Valve to pressurize
the Diaphragm Actuator. The Clapper should now be
held in the closed position.
12 Replace the Handhold Cover and Gasket, tightening
the Cover Bolts (Cap Screws) evenly and securely.
13. Close the Auxiliary Drain Valve on the Air Check Valve
and open the Priming Cup Valve.
14. Prime the Air Check Valve by slowly opening the Priming Valve and allowing water to flow into the Priming
Cup. Shut the Priming Valve when water starts to fill
the cup.
Note: To add priming water to the valve, the system
piping must be open to atmosphere - for example,
through an opened sprinkler or low point drain.
15. Slowly open the Auxiliary Drain Valve on the Air Check
Valve to remove excess priming water. Close the valve
when the water leaves the Priming Cup. Then, close
the Priming Cup Valve.
16. Check the Ball Drip for leakage. If there is none, proceed with resetting the system.
22
Note: Priming water must be retained in the air
check valve before the system is returned to service.
If leakage is observed at the ball drip, the check
valve must be opened and cleaned. Replace the
clapper facing if it is worn.
17. Replace the sprinklers which have operated and make
sure all auxiliary low point drains are closed.
18. Open the Supervisory Air Supply Control Valve and
admit air to the system. The Air Pressure Gage will
register 24 ounces per square inch (if the pressure
regulator is properly adjusted).
19. Again, check the Ball Drip for leakage. If there is none,
proceed with resetting the system.
Note: If the clapper is tight on the seat ring of the air
check valve, the valve will be holding its priming
water and no leakage will be found. If leakage is
observed, the check valve must be reopened and
reinspected.
20. Slowly open the System Control Valve. When water
starts to discharge from the main drain pipe, slowly
close the Main Drain Valve.
21. Turn the system Control Valve to its full open position.
22. Open the Alarm Control Valve - if it has been closed to
silence alarms.
23. Conduct a Main Drain Test to make sure the water
supply is satisfactory (see Flow Test at Main Drain
Valve).
24. Conduct a test of the alarm devices (see Testing
Waterflow Alarm Devices).
25. 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.
CAUTION: If alarms connect to a central station
or fire department, notify the signal receiving
station that the system has been returned to
service.
SVL500
System Pressure Test Records
System Water Pressure
Pressure
Date
Diaphragm Actuator
Operating Pressure
Pressure
Date
Initial
Periodic
SVL500
23
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.
3/02 Printed in USA (SLV500.PMD)
"Automatic" Sprinkler
150 Gordon Drive • Exton, PA 19341 USA
Tel: (610) 363-1400 • 800-626-2682
Fax: (610) 524-9073 • 800-858-6857
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