Star A-1 User manual

Dry Pipe Valve
Model A-1, 6 Inch (DN150)
FlangexGroove
GENERAL DESCRIPTION
The Star 6 inch (DN150), Model A-1 Dry Pipe Valve is a
differential valve used to automatically control the flow of
water into a dry pipe fire protection sprinkler system upon
operation of one or more automatic sprinklers.The Model
A-1 Dry Pipe Valve also provides for actuation of fire
alarms upon system operation.
Dry pipe sprinkler systems are typically used in unheated
warehouses, parking garages, store windows, attic
spaces, loading docks, and other areas exposed to freez-
ing temperatures where water filled pipe cannot be util-
ized.When set for service, the dry pipe sprinkler system
is pressurized with air (nitrogen), and the loss of air pres-
sure through an operated automatic sprinkler, in re-
sponse to heat from a fire, permits the Model A-1 Dry
Pipe Valve to open and allow a flow of water into the sprin-
kler system piping.
The differential design of the Model A-1 Dry Pipe Valve is
such that the minimum air pressure in the piping is calcu-
lated to be approximately 1/5 of the static water supply
pressure plus an added safety factor that helps prevent a
false operation that might otherwise occur due to water
supply pressure fluctuations.
WARNING
The Model A-1 Dry Pipe Valve described herein must be
installed and maintained in compliance with this docu-
ment, as well as with the applicable standards of the Na-
tional Fire Protection Association, in addition to the stand-
ards of any other authorities having jurisdiction. Failure to
do so may impair the integrity of this device.
The owner is responsible for maintaining his fire protec-
tion system and devices in proper operating condition.
The installing contractor or sprinkler manufacturer should
be contacted relative to any questions.
TECHNICAL DATA
Approvals
UL and ULC Listed.FM and LPC Approved.
Working Water Pressure
20 to 175 psi (1.4 to 12.1 bar).
Friction Loss
Refer to Figure 3.
System Air Pressure Requirements
Refer to Table A.
Physical Characteristics
Body components illustrated in Figure 1 are constructed
of cast iron.The seat ring is copper, and the clapper is
ductile iron.The clapper facing is Buna-N.
OPERATION
The Model A-1 Dry Pipe Valves are differential type
valves that utilize a substantially lower system (air) pres-
sure than the supply (water) pressure, to maintain the set
position shown in Figure 2-A.The differential nature of
the Model A-1 Dry Pipe Valve is based on the area differ-
ence between the air seat and the water seat.The differ-
ence is such that 1 psi (0.07 bar) of system air pressure
can hold approximately 5 psi (0.34 bar) of water supply
pressure.
The minimum system air pressure (Ref. Table A) is, there-
fore, calculated to be approximately 1/5 of the static water
supply pressure, plus a safety factor, to help prevent a
false operation that might otherwise occur due to water
supply pressure fluctuations.
Priming water within the body of the Model A-1 Dry Pipe
Valve, as shown in Figure 2-A, helps to maintain a tight
air seal at the air seat.Between the air and water seats,
an intermediate chamber is formed, and the intermediate
chamber is normally open to atmosphere through the
alarm port and piping to the Automatic Drain Valve
(5 - Fig. 4).
Having the intermediate chamber open to atmosphere is
critical to the Model A-1 Dry Pipe Valve remaining set,
otherwise the full resulting pressure of the system air
pressure on top of the Clapper Assembly cannot be real-
ized.For example, if the system air pressure is 40 psi
(2.7 bar) and there was 25 psi (1.7 bar) pressure
trapped in the intermediate chamber, the resulting pres-
sure across the top of the Clapper would be only 15 psi
(1.0 bar), which would be insufficient to hold the Clapper
Assembly closed against a water supply pressure of 100
psi (6.9 bar).It is for this reason that the plunger of the
Automatic Drain Valve needs to be depressed several
times during resetting of the Model A-1 Dry Pipe Valve,
414-570-5000 • 800-558-5236 • FAX [phone]
2-2.1.41
STAR SPRINKLER INC.
www.starsprinkler.com
#1098 Valve
#1210 Trim
OBSOLETE

as well as during inspections, to make certain that the
Automatic Drain Valve is open.
When one or more automatic sprinklers operate in re-
sponse to a fire, air pressure within the system piping is
relieved.When the air pressure becomes sufficiently re-
duced, the water pressure overcomes the differential hold-
ing the Clapper Assembly closed and the Clapper Assem-
bly swings clear of the water seat to permit waterflow into
the system piping and subsequently to be discharged
from any open sprinklers.
Under full flow conditions, the Clapper Assembly will
open as shown in Figure 2-B. Also, with the Clapper As-
sembly open, the intermediate chamber is pressurized
and water flows through the alarm port at the rear of the
Model A-1 Dry Pipe Valve to actuate system waterflow
alarms. The flow from the alarm port is also sufficient to
close the otherwise normally open Automatic Drain Valve
(5 - Fig. 4).
As an option, the Model A-1 Dry Pipe Valve may be
equipped with a Model S430 Dry Pipe Valve Accelerator
to reduce the time for the Dry Pipe Valve to open follow-
ing the operation of one or more automatic sprinklers,
and in some cases may be required to meet the require-
ments of NFPA 13 for systems having a capacity greater
than 500 gallons (1890 litres).Refer to Figure 7 and Prod-
uct Data Sheet 2-5.4.10.
DESIGN CRITERIA
The Model A-1 Dry Pipe Valve must be installed vertically
as shown in Figure 6, and it must be installed in a readily
visible and accessible location, where the valve and asso-
ciated trim must be maintained at a minimum tempera-
ture of 40°F/4°C. NOTE
Heat tracing of the Model A-1 Valve or its associated trim
is not permitted. Heat tracing can result in the formation
of hardened mineral deposits which are capable of pre-
venting proper operation.
In planning the installation, consideration must also be
given to the disposal of the large quantities of water
which may be associated with draining the system, per-
forming a flow test, or performing a system trip test.
Installation configuration and clearance dimensions are
given in Figure 6.The flanged inlet connection is faced
and drilled per ANSI Standard B16.1, unless otherwise
specified when ordered.
Review the requirements of NFPA 13 with respect to the
requirements for quick opening devices (Model S430 Dry
Pipe Valve Accelerator), air compressor sizing, waterflow
alarms, and low pressure alarm switches.
STAR SPRINKLER INC.
Page 2 2-2.1.41
FIGURE 1
6 INCH (DN150) MODEL A-1
DRYPIPEVALVE
ASSEMBLY
154
CLAPPER
ASSEMBLY
9
8
719
18
16
17
11
10
12
13 15
14
32 6
NO. DESCRIPTION....QTY. PART
1 Body .......... 1 NR
2 WaterSeatRing.... 1 NR
3 AirSeatRing...... 1 NR
4 Handhole Cover .... 1 600-02-000
5 Handhole Cover Gasket 1 600-04-000
6 Handhole Cover Bolt,
3/4-10UNCx2" .... 8 600-03-000
7 Clapper ......... 1 600-182-00
8 Clapper Facing ..... 1 600-180-00
9 Clapper Facing
Retainer ........ 1 600-181-00
10 Clapper Facing
RetainerBolts ..... 6 600-80-000
11 Clapper Latch ..... 1 300-10-000
12 Clapper Latch Spring . 1 300-21-000
13 Clapper Latch
HingePin........ 1 300-23-000
14 Clapper Latch
Hinge Pin
RetainingRing..... 2 300-22-000
15 Clapper Latch
Hinge Pin Bushing . . . 2 818-08-000
16 Clapper Hinge Pin . . . 1 8010-10-10
17 Body
Bushing......... 2 600-187-00
18 Clapper Hinge Pin
Plug,1/2"NPT..... 2 8010-12-00
19 Clapper Hinge Pin
Clapper Bushing .... 2 8010-08-00
— Clapper Assembly . . . 1 600-186-00
NR — Not Replaceable
OBSOLETE

INSTALLATION
The Model A-1 Dry Pipe Valve must be installed in accord-
ance with the following instructions.
NOTES
Proper operation of the Model A-1 Dry Pipe Valve de-
pends upon its trim being installed in accordance with the
instructions given in this Technical Data Sheet. Failure to
follow the appropriate trim diagram may prevent the
Model A-1 Dry Pipe Valve from functioning properly, as
well as void listings, approvals, and the manufacturer’s
warranties.
1. All nipples, fittings, and devices must be clean and free
of scale and burrs before installation. Use pipe thread
sealant sparingly on male pipe threads only.
2. The Model A-1 Dry Pipe Valve must be trimmed in ac-
cordance with Figures 4 and 5.
3. Care must be taken to make sure that check valves,
strainers, globe valves, etc. are installed with the flow ar-
rows in the proper direction.
4. Drainage to the drip funnel must be installed so as to not
restrict flow.
5. Suitable provision must be made for disposal of drain
water. Drainage water must be directed such that it will
not cause accidental damage to property or danger to
persons.
6. The Pressure Relief Valve must be set to relieve at a
STAR SPRINKLER INC.
2-2.1.41 Page 3
FIGURE 2
MODEL A-1 DRY PIPE VALVE
OPERATION
(FULLY
VALVE IN OPERATED POSITION
VALVE IN DRAIN POSITION
WATER SUPPLY SHUT OFF
LATCH
MAIN
2" NPT
POSITION
PORT
DRAIN
(AFTER MAIN CONTROL
VALVE IS CLOSED)
1/2" NPT
WATER
SUPPLY
PORT
PRESSURE
FIRST
LATCH
SECOND
POSITION
DRAIN FROM SYSTEM
FROM WATER SUPPLY
(LATCHED)
CLAPPER
ASSEMBLY
TO ALARM)
LATCH
CLAPPER
WATERFLOW
ALARM PORT
(WATERFLOW
OPEN)
UP
AIR PRESSURE TO SYSTEM
AIR SUPPLY
PRIMING
3/4" NPT
PORT
SEAT
AIR
FILL PORT
SEAT
WATER
LIFTING
LUGS
VALVE IN SET POSITION
WATERFLOW TO SYSTEM
FROM WATER SUPPLY
3/4" NPT
3/4" NPT
ATMOSPHERE)
ASSEMBLY
CLAPPER
(OPEN TO
ALARM PORT
INTERMEDIATE
CHAMBER
LEVEL
PRIMING
2A
2B
2C
FIGURE 3
MODEL A-1 DRY PIPE VALVE
6 INCH (DN150) FRICTION LOSS
2000 3000600 1000200 400
20001000 4000 10000
FLOW RATE IN GALLONS PER MINUTE (GPM)
NOMINAL PRESSURE DROP IN BAR
(1 PSI = 0.06895 BAR)
FLOW RATE IN LITRES PER MINUTE (LPM)
(1 GPM = 3.785 LPM)
0.008
0.010
0.020
0.080
0.040
0.060
0.100
0.200
0.400
0.600
0.1
NOMINAL PRESSURE DROP IN POUNDS PER SQUARE INCH (PSI)
4.0
0.2
0.6
0.4
1.0
0.8
2.0
6.0
10.0
8.0
OBSOLETE

STAR SPRINKLER INC.
Page 4 2-2.1.41
36 28
8
34 41
12
40
18
31
42
16
4
17
27
38
29
15
37
26
39
37
25
37
11
37
26
10
7
14
29
3
1
13 21
31
31
6
29
4
32
21
5
13
35
33
20
24
39
9
14 19
31
18
22 37
30
23
38
38
2
3
13
24
39
31
37
11
FIGURE 4 — 6 INCH (DN150) MODEL A-1 DRY PIPE VALVE TRIM (#1210)
NO. DESCRIPTION....QTY. PART
1 250 lb. Air Pressure
Gauge ......... 1 #923001005
2 300 lb. Water Pressure
Gauge ......... 1 #923001003
3 1/4" Gauge Test Valve . 2 #460051002
4 1/4"GlobeValve.... 2 #460471002
5 1/2" Automatic Drain
Valve,S410 ...... 1 #923001004
6 1/2"BallValve..... 1 #923001002
7 1/2" Pressure Relief
Valve.......... 1 2283
8 1/2" Swing Check Valve 1 #460491004
9 3/4"BallValve..... 1 #923001007
10 3/4"GlobeValve.... 1 #460471005
NO. DESCRIPTION .....QTY. PART
11 3/4" Swing Check Valve 2 #460491005
12 2"AngleValve .....1 #460481009
13 1/4"Plug ........3 CH
14 1/2"Plug ........2 CH
15 1"Plug..........1 CH
16 3/4" x 1/4" Bushing . . . 1 CH
17 1/4"StreetElbow....1 CH
NO. DESCRIPTION . . . .QTY. PART
18 1/2"90°Elbow.....2 CH
19 1/2"Tee ........ 1 CH
20 1/2" x 1/4" x 1/2" Tee . 1 CH
21 1/2" x 1/2" x 1/4" Tee . 2 CH
22 3/4"Union ....... 1 CH
23 3/4"90°Elbow.....1 CH
24 3/4" x 1/2" x 3/4" Tee . 2 CH
25 3/4" x 3/4" x 1/4" Tee . 1 CH
26 3/4" x 3/4" x 1/2" Tee . 2 CH
27 3/4" x 3/4" x 1" Tee . . 1 CH
28 2" x 2" x 1/2" Tee . . . 1 CH
29 1/4" x close Nipple . . . 3 CH
30 1/4"x14"Nipple....1 CH
31 1/2" x close Nipple . . . 5 CH
32 1/2" x 1-1/2" Nipple . . 1 CH
33 1/2"x2"Nipple.....1 CH
34 1/2"x5"Nipple.....1 CH
35 1/2" x 5-1/2" Nipple . . 1 CH
36 1/2"x6"Nipple.....1 CH
37 3/4" x close Nipple . . 6 CH
38 3/4" x 2-1/2" Nipple . . 3 CH
39 3/4"x5"Nipple.....3 CH
40 2" x 2-1/2" Nipple . . . 1 CH
41 2" x 6-1/2" Nipple . . . 1 CH
42 Drip Funnel ....... 1 2360
CH: Common Hardware
OBSOLETE

pressure which is in accordance with the requirements
of the Authority Having Jurisdiction — usually 5 psi
(0.34 bar) higher than the required system air pressure.
7. Installation of an Air Maintenance Device, which pro-
vides a restricted air inlet for the automatic air supply, is
recommended.
8. An Inspector’s Test Connection as required by NFPA 13
must be provided on the system piping at the most re-
mote location from the Model A-1 Dry Pipe Valve.
9. Conduit and electrical connections are to be made in ac-
cordance with the requirements of the authority having
jurisdiction and/or the National Electric Code.
10. Before hydrostatic tests are performed in accordance
with NFPA 13 system acceptance test requirements, the
Clapper Assembly is to be manually latched open (Ref.
Figure 2-C); the Automatic Drain Valve (5 -Fig. 4) is to
be temporarily replaced with a 1/2 inch NPT pipe plug;
and the Handhole Cover Bolts are to be tightened using
a cross-draw sequence. Also, if a Model S430 Accelera-
tor is being utilized, the Accelerator control Valve must
be closed.
STAR SPRINKLER INC.
2-2.1.41 Page 5
FIGURE 5
6 INCH (DN150) MODEL A-1 DRY PIPE VALVE TRIM
SUB-ASSEMBLIES (#1210)
PRESSURE
GAUGE
WATER SUPPLY
SYSTEM
TO ALARMS
CONNECTION
3/4 INCH NPT
TEST VALVE
ALARM
(NORMALLY
CLOSED)
AIR SUPPLY
CONTROL VALVE
(NORMALLY
OPEN)
3/4 INCH NPT
CONNECTION
FOR SYSTEM
AIR SUPPLY
PRESSURE
GAUGE
AIR SUPPLY
SYSTEM
AUTOMATIC
DRAIN VALVE
CONNECTION
PRIMING
1 INCH NPT
CLOSED)
(NORMALLY
DRAIN VALVE
MAIN
2 INCH NPT
CONNECTION
CLOSED)
(NORMALLY
TEST VALVE
PRIMING
TO DRAIN
ASSEMBLY
ORIENTED WITH
DRIP FUNNEL
POSITIONED
UNDER AUTOMATIC
DRAIN VALVE
2
1
14
4
3
FUNNEL
DRIP
15
6
5
11
CONTROL
(NORMALLY
OPEN)
ALARM
VALVE
DRAIN VALVE
ALARM LINE
(NORMALLY
CLOSED) 7
9
10
8
13
NOTE:
INSTALL TRIM ASSEMBLIES
IN NUMERICAL ORDER
NIPPLE
3/4" x 5"
NIPPLE
3/4" x 5"
NIPPLE
3/4" x 2-1/2"
12
OBSOLETE

STAR SPRINKLER INC.
Page 6 2-2.1.41
FIGURE 7
OPTIONAL MODEL S430 DRY PIPE VALVE ACCELERATOR
(Refer to Product Data Sheet 2-5.4.10 for complete information)
FIGURE 6
6 INCH (DN150) MODEL A-1 DRY PIPE VALVE AND TRIM INSTALLATION DIMENSIONS
TO SYSTEM PIPING
1/2" NPT CONNECTION
ACCELERATOR
CONTROL VALVE
REAR VIEWRIGHT SIDE VIEW
RESET
VENT
PLUG
KNOB
(381.0 mm)
15" ACCELERATOR MODEL S430
(749.3 mm)
29-1/2"
(355.6 mm)
14"
(NORMALLY OPEN)
1/2" NPT ACCELERATOR TRIM
CONNECTION TO DRY PIPE VALVE
INTERMEDIATE CHAMBER
20"
(508.0 mm)
9-5/8"
(244.5 mm)
24-1/2"
(622.3 mm)
6-1/2"
(165.1 mm)
21-1/4"
(539.8 mm)
15"
(381.0 mm) 9-7/8" (250.8 mm)
OBSOLETE

SETTING PROCEDURE
Steps 1 through 14 are to be performed when initially set-
ting the Model A-1 Dry Pipe Valve; after an operational
test of the fire protection system;or, after system opera-
tion due to a fire (Ref. Figure 5).
1. Close the Main Control Valve, close the Air Supply Con-
trol Valve, and close the Accelerator Control Valve, if ap-
plicable.
2. Open the Main Drain Valve, Alarm Line Drain Valve,
and all auxiliary drains in the system. Close the Alarm
Line Drain Valve and auxiliary drain valves after water
ceases to discharge. Leave the Main Drain Valve open.
3. Depress the plunger of the Automatic Drain Valve to ver-
ify that it is open and that the Model A-1 Dry Pipe Valve
is completely drained.
4. Open the Alarm Control Valve, if it was closed to silence
local alarms.
It is recommended that the Alarm Control Valve be wire
sealed in the open position.
5. As necessary, replace all sprinklers that have operated.
Replacement sprinklers must be of the same type and
temperature rating as those which have operated.
NOTE
In order to prevent the possibility of a subsequent operation
of an overheated solder type sprinkler, any solder type sprin-
klers which were possibly exposed to a temperature greater
than their maximum rated ambient must be replaced.
6. Remove the Handhole Cover and then clean all interior
parts of the Model A-1 Dry Pipe Valve. Use a clean cloth
to wipe the Air and Water Seat Rings, as well as the
Clapper Facing. Inspect the Clapper Facing, as well as
the Air and Water Seat Rings for damage and check the
Clapper Assembly and Clapper Latch for freedom of
movement.
Worn or damaged parts must be replaced and the
Model A-1 Dry Pipe Valve must be reassembled in ac-
cordance with Figure 1.
7. Reseat the Clapper Assembly.
NOTE
When the ClapperAssembly is properly seated, the Clapper
Latch should swivel freely.
8. Replace the Handhole Cover and Handhole Cover Gas-
ket. Uniformly tighten the Cover Bolts using a cross-
draw sequence.
9. Open the 1 inch NPT Priming Connection, and prime
the Model A-1 Dry Pipe Valve by slowly pouring water
into the 1 inch NPT Priming Connection until the water
does not continue to flow into the valve. Approximately 4
gallons (15 litres) of prime water will be required.
Open the Priming Test Valve. After water stops discharg-
ing from the Priming Test Valve, close the Priming Valve
and the 1 inch NPT Priming Connection.
Minor drippage of water form the Automatic Drain Valve
is normal, until system air pressure is ultimately estab-
lished in Step 11 and 12.
10. Pressurize the system with air (nitrogen) to 10 psi (0.7
bar), and then individually open all auxiliary drain valves
in the system piping to drain any remaining water in
trapped sections. Close each drain valve as soon as
water ceases to discharge.
11. Refer to Table A and then restore the system to the nor-
mal system air pressure necessary to hold the Model
A-1 Dry Pipe Valve closed.
12. Depress the plunger on the Automatic Drain Valve to en-
sure it is open and that there is no water or air discharg-
ing.
If water and/or air is discharging, refer to the Care and
Maintenance section under Automatic Drain Valve In-
spection to determine/correct the cause of the leakage
problem.
13. If applicable, reset the Model S430 Dry Pipe Valve Ac-
celerator following the instructions provided in 2-5.4.10.
14. Partially open the Main Control Valve. Close the Main
Drain Valve as soon as water discharges from the drain
connection.
Depress the plunger on the Automatic Drain Valve to
make sure that it is open and that there is no water dis-
charging. The absence of water discharging is an indica-
tion of a properly set water seat within the Model A-1
Dry Pipe Valve. If water is discharging, refer to the Care
and Maintenance section under the Automatic Drain
Valve Inspection to determine/correct the cause of the
leakage problem.
If there are no leaks, the Model A-1 Dry Pipe Valve is
readytobeplacedinserviceandtheMainControl
Valve must then be fully opened.
NOTE
After setting a fire protection system, notify the proper
authorities and advise those responsible for monitoring
proprietary and/or central station alarms.
MAINTENANCE AND SERVICE
The following procedures and inspections should be per-
formed as indicated, in addition to any specific require-
ments of the NFPA. Any impairment must be immedi-
ately corrected. It is also recommended that fire
protection systems be inspected by a qualified Inspection
Service. NOTES
The operational test procedure and waterflow pressure
alarm test procedure, result in operation of the associ-
ated alarms. Consequently, notification must first be
given to the owner and the fire department, central sta-
tion, or other signal station to which the alarms are con-
nected.
Before closing a fire protection system main control valve
for maintenance work on the fire protection system which
it controls, permission to shut down the effected fire pro-
tection systems must first be obtained from the proper
authorities and all personnel who may be affected by this
decision must be notified.
Annual Operation Test Procedure
Proper operation of the Model A-1 Dry Pipe Valve (i.e.,
tripping of the Model A-1 Dry Pipe Valve as during a fire
STAR SPRINKLER INC.
2-2.1.41 Page 7
System Water System Air Pressure, psi
Pressure, psi Minimum Maximum
50 15 25
75 25 35
100 35 45
125 40 50
150 40 50
175 40 50
TABLE A
RECOMMENDED SYSTEM AIR PRESSURE
OBSOLETE

condition) should be verified at least once a year as fol-
lows:
1. If water must be prevented from flowing beyond the
riser, perform the following steps.
a. Close the Main Control Valve.
b. Open the Main Drain Valve.
c. Open the Main Control Valve one turn beyond the
position atwhichwaterjustbeginstoflowfromthe Main
Drain Valve.
d. Close the Main Drain Valve.
2. Open the system’s Inspector’s Test Connection.
3. Verify that the Model A-1 Dry Pipe Valve has operated,
as indicated by the flow of water into the system and
that all waterflow alarms operated properly.
4. Close the system’s Main Control Valve.
5. Reset the Model A-1 Dry Pipe Valve in accordance with
the Valve Setting Procedure.
Quarterly Waterflow Alarm Test Procedure
Testing of the system waterflow alarms should be per-
formed quarterly. To test the waterflow alarm, open the
Alarm Test Valve, which will allow a flow of water to the
Waterflow Pressure Alarm Switch and/or Water Motor
Alarm. Upon satisfactory completion of the test, close the
Alarm Test Valve.After the test is completed, open the
Alarm Line Drain Valve and then close the Alarm Line
Drain Valve after water ceases to drain.
Water Pressure Inspection
The Water Pressure Gauge is to be inspected each week
to ensure that normal system water pressure is being
maintained.
Air Pressure Inspection
The Air Pressure Gauge is to be inspected each week to
ensure that normal system air pressure is being main-
tained.
Automatic Drain Valve Inspection
The Automatic Drain Valve should be inspected each
week by depressing the plunger and checking to ensure
that the Automatic Drain Valve is not discharging water
and/or air. Discharging of water and/or air is an indication
that the air and/or water seats are leaking, which could
subsequently cause a false operation should the interme-
diate chamber become inadvertently pressurized.
If leakage is present, take the Model A-1 Dry Pipe Valve
out of service (i.e., close the main control valve, open the
main drain valve, close the air supply control valve, close
the Accelerator Control Valve, as applicable, and open
the Inspector’s Test Connection to relieve the system air
pressure to 0 psig as indicated on the System Air Pres-
sure Gauge).After removing the Handhole Cover, check
the following items:
A. Clapper Facing: Make sure that the Clapper Facing
does not show signs of compression set, damage, etc.
Replace the Clapper Facing if there are any signs of
wear.
B. Alarm Test Valve: Make certain that the Alarm Test
Valve is completely closed. Replace the Alarm Test
Valve if necessary.
C. Air and Water Seat Rings: Inspect the Air and Water
Seat Rings for nicks. If there are signs of wear and the
replacement of the Clapper Facing does not stop leak-
age from the Automatic Drain Valve, the Dry Pipe Valve
must be replaced, since the Air and Water Seat Rings
are not field replaceable.
Priming Water Inspection
The priming level is to be inspected quarterly. Partially
open the Priming Test Valve, and then close the Priming
Test Valve when the priming level has been correctly es-
tablished (i.e., when water stops discharging from the
Priming Test Valve).
If no water discharges, close the Priming Test Valve and
replenish the Priming Level by performing Steps 1, 2, 3,
9, 11, 12, and 14 in the Valve Setting Procedure section.
ORDERING PROCEDURE
Please Specify:
1. 6 Inch (DN150) Model A-1 Dry Pipe Valve
Flange x Groove (#1098)
2. Model A-1 Dry Pipe Valve Trim
For 4 and 6 Inch Model A-1 Dry Pipe Valves (#1210)
Separately Ordered Items:
1. Waterflow Pressure Alarm Switch
2. Air Maintenance Device:
Model S460 Pressure Reducing Type (#1612), or
Model S465 Compressor Control Type (#1613)
Optional:
1. Model S430 Dry Pipe Valve Accelerator (#1306)
2. Model S430 Dry Pipe Valve Accelerator Trim
For 4 and 6 Inch Model A-1 Dry Pipe Valves (#1306-01)
3. Model S450 Water Motor Alarm (#5405)
4. Low Pressure Alarm Switch
Refer to Price List for for complete listing of Part
Numbers with respect to trim finish, replacement parts,
etc.
AVAILABILITY AND SERVICE
Star Sprinkler Inc. products and devices are available
worldwide through a network of independent distributors.
Please contact Star Sprinkler Inc.for information and the
name and address of the Star distributor in your area.
LIMITED WARRANTY
Seller warrants for a period of one year from date of ship-
ment (warranty period) that the products furnished here-
under will be free of defects in material and workmanship.
For further details on Warranty, contact Star Sprinkler Inc.
STAR SPRINKLER INC.
Page 8 2-2.1.41
7071 S. 13th Street • Suite 103
Oak Creek, WI 53154
414-570-5000 • 800-558-5236 PRINTED IN U.S.A. 2-00
OBSOLETE