PRODUCT DATA
® U.S. Registered Trademark
© 2004 Honeywell International Inc.
All Rights Reserved 65-0270—3
V4730A/V8730A, V4750A/V8750A
Double Block
Safety Shutoff Valves
APPLICATION
The V4730A/V8730A, V4750A/V8750A Double Block Valves
are used for control of gaseous fuels in gas-fired power
burners, atmospheric gas boilers, ovens, furnaces,
incinerators, roof-top units, makeup air units and other gas
consuming appliances.
FEATURES
• Double block safety shutoff valves for control of
gaseous fuels in gas consuming appliances in
accordance with international standards.
• Main body with two single-seat shutoff valves.
• Provides for mounting optional flanged pressure
switches.
• Closing time: < 1 second.
• Coils suitable for permanent energization.
• Fine mesh screen (strainer) between inlet flange and
main body.
• Various pressure tap points at main body available,
when no additional valves or pressure switches are
used.
• Plug connector according to DIN 43650, included.
• Adjustable maximum flow rate limiter (all models).
• Adjustable step opening pressure (V4750A/V8750A
only).
• Replaceable pipe flange adapters included.
• First and second internal shutoffs can be
independently energized for intermittent pilot
applications.
• Position indication lamp for each valve stage.
V4730A/V8730A
V4750A/V8750A
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ........................................................ 2
Installation ........................................................................ 4
Adjustments and Final Checkout ...................................... 5
Operation .......................................................................... 7
Troubleshooting ................................................................ 10
Service Information .......................................................... 10
V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES
65-0270—3 2
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
SPECIFICATIONS
The specifications in this section are related to the main valve.
The valve must be used in combination with a burner control.
Models: See Table 1.
Table 1. Model Number and Specifications.
Maximum Operating Pressure (UL):
2.9 psi (200 mBar), except for 1-1/4 in. size, which has
maximum operating pressure of 1.45 psi (100 mBar)—120V
model and 1 psi (70 mbar)—24V model
NOTE: CSA Certification to 1/2 psi.
Maximum Operating Pressure (CSA):
All valves are rated for 1/2 psi (35 mbar).
Connections:
1/8 in. (3 mm) pressure taps at inlet and outlet flanges. Eight
flange connections are provided at the main body to mount
either a pressure switch (low or high) or a Valve Proving
System (VPS).
Torsion and Bending Stress: Pipe connections meet
EN161, Group 2, requirements.
Electrical Equipment: Dc coils with combined rectifier inside
the cover.
Electrical Connection: Standard DIN plug connector with 36
in. (914 mm) leadwires, included.
Valve Position Indicator Lamps:
Inboard (closest to the valve body)—V1.
Outboard—V2.
Ambient Temperature Range: 5°F to 140°F (-15°C to
+60°C).
Model Number
Pipe Size (in.
NPT, Nominal)
Voltage Rating
(Vac, 50/60 Hz)
Current Rating in Amperes (A)
Capacity (cfh), Natural Gas (1 in.
w.c., delta P)
V1 V2 V1 + V2 With Screen Without Screen
V4730A1000 1/2 120 0.16 0.16 0.32 221 225
V4730A1018 3/4 359 362
V4730A1026 1 0.25 0.25 0.50 546 567
V4730A1034 1-1/4 582 634
V8730A1001 1/2 24 0.78 0.78 1.56 221 225
V8730A1019 3/4 359 362
V8730A1027 1 0.86 0.86 1.72 546 567
V8730A1035 1-1/4 582 634
V4750A1005 1/2 120 0.16 0.16 0.32 221 225
V4750A1013 3/4 359 362
V4750A1021 1 0.25 0.25 0.50 546 567
V4750A1039 1-1/4 582 634
V8750A1006 1/2 24 0.78 0.78 1.56 221 225
V8750A1014 3/4 359 362
V8750A1022 1 0.86 0.86 1.72 546 567
V8750A1030 1-1/4 582 634
V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES
3 65-0270—3
Coil Insulation Solenoid Valves: Class H insulation system.
Enclosure: IP 54 (NEMA 2).
Body Material: Aluminum alloy, die cast.
Strainer: Fine mesh screen (.0135 in. [0.34 mm] diameter),
AISI 303 steel, serviceable after removing inlet flange screws.
Meets EN 161 requirements for strainers.
Seals and Gaskets: Hydrocarbon resistant NBR and Viton
rubber types.
Flange Kit: Consists of one flange with sealing plug, 1 O-ring
and four screws.
Opening Time:
Dead time maximum: 1 second.
First valve opening: < 1 second.
Second valve opening: < 1 second.
Maximum Allowable Leakage:
Outerwall: 3 cu. in./hr (50 cm3/h) at test pressure of 0.087 psi
(6 mbar) and 7.83 psi (540 mbar).
First valve: 2.4 cu. in./hr, (40 cm3/h) at test pressure of 0.087
psi (6 mbar) and 7.83 psi (540 mbar).
Second valve: 2.4 cu. in./hr (40 cm3/h) at test pressure of
0.087 psi (6 mbar) and 7.83 psi (540 mbar).
High Pressure Test: In the Off condition, the valve will
withstand 21.75 psi (1.5 bar) inlet pressure without
damage.
NOTE: Attempts to operate the valve while in this condition
will not cause damage.
Closing Time: Less than 1 second for all valves.
Maximum Working Frequency: One cycle per minute.
Duty Cycle: Coil suitable for permanent energization in
cooperation with ignition controller.
Operational Voltage Range: The combination gas valve will
function satisfactorily between 85% and 110% of the rated
voltage.
Design Life: 500,000 cycles.
Dimensions: See Fig. 1-4.
Approvals:
Gas Appliance Directive 90.396/EEC.
PIN: 0063AT1198.
Low Voltage Directive: 73/23/EEC.
Electro Magnetic Compatibility Directive: 89/336/EEC.
CSA: File: Certificate Number: 158158-1227192.
Underwriters Laboratories, Inc. (UL): MH18476.
Accessories:
32006652-001 Flange for 1/2 in. valve.
32006652-002 Flange for 3/4 in. valve.
32006652-003 Flange for 1 in. valve.
32006652-004 Flange for 1-1/4 in. valve.
Fig. 1. Approximate dimensions of V4730A/V8730A
(1/2 in. and 3/4 in. pipe size) in in. (mm).
Fig. 2. Approximate dimensions of V4730A/V8730A
(1 in. and 1-1/4 in. pipe size) in in. (mm).
M21009C
7-7/32 (185)
1-27/32
(48)
4-7/32
(107)
5-1/4 (133)
6-1/2
(166)
2 (51)
2-1/32
(52)
3-7/8 (98)
1-11/16
(43)
PRESSURE
SWITCH
OPTIONAL
M21008C
7-7/32 (185)
1-27/32
(48)
4-7/32
(107)
5-1/4 (133)
7-5/16
(240)
2 (51)
2-1/32
(52)
3-7/8 (98)
1-11/16
(43)
PRESSURE
SWITCH
OPTIONAL
V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES
65-0270—3 4
Fig. 3. Approximate dimensions of V4750A/V8750A
(1/2 in. and 3/4 in. pipe size) in in. (mm).
Fig. 4. Approximate dimensions of V4750A/V8750A
(1 in. and 1-1/4 in. pipe size) in in. (mm).
INSTALLATION
When Installing this Product…
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. The installer must be a trained, experienced flame
safeguard technician.
4. After installation is complete, check out product
operation as provided in these instructions.
WARNING
Fire or Explosion Hazard.
Can cause serious injury, death or property
damage.
1. Turn off the gas supply before beginning installation.
2. Disconnect power supply to the valve actuator
before beginning installation to prevent electrical
shock and damage to the equipment.
3. Do not remove the seal over the valve inlet and
outlet until ready to connect piping.
4. The valve must be installed so that the arrow on the
valve points in the direction of the gas flow, so that
gas pressure helps to close the valve.
Mounting Position
The gas valve can be mounted plus or minus 90 degrees from
the vertical.
Mounting locations
The distance between the gas valve and the wall/ground must
be a minimum of 11-5/16 in. (30 cm).
Main Gas Connection
1. Take care that dirt does not enter the gas valve during
handling.
2. Remove the flanges from the valves.
3. Use new, properly reamed, pipe, free from chips.
4. Apply a moderate amount of good quality pipe dope,
resistant to the action of liquid propane (LP) gas only on
the pipe threads.
5. Screw the flanges onto the pipes.
6. Do not thread pipe too far into flange. Valve distortion or
malfunction can result from excess pipe in the flange.
7. Make sure O-ring sealing surfaces are clean.
8. Make sure that the inlet and out flanges are in line and
separated from each other enough to allow the valve to
be mounted between the flanges without damaging the
O-ring.
9. Using general purpose lithium grease, grease the
O-ring.
10. Install the O-ring in the O-ring grooves provided on the
valve bodies (one O-ring per groove).
11. Mount the gas valve between the flanges, using the
screws removed earlier.
12. Complete the electrical connections as instructed in the
Electrical Connection section.
M20581A
7-1/4 (185)
1-27/32
(48)
4-7/32
(107)
5-1/4 (133)
8-21/32
(220)
2 (51)
2-1/32
(52)
1-11/16 (43)
6-1/2
(166)
M20582A
7-1/4 (185)
1-27/32
(48)
4-7/32
(107)
5-1/4 (133)
9-7/16
(240)
2 (51)
2-1/32
(52)
1-11/16 (43)
7-5/16
(186)
V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES
5 65-0270—3
WARNING
Fire or Explosion Hazard.
Can cause property damage, severe injury or
death.
Perform a soap and water solution leak test any time
work is done on a gas system.
Electrical Connections
WARNING
Electrical Shock Hazard.
Can cause serious injury or death.
Disconnect the power supply before beginning wiring to
prevent electrical shock.
Wiring
1. Use 14, 16 or 18 AWG copper conductor, 600 volt
insulation, moisture-resistant wire for line voltage
connections. Recommended part numbers are
TTW60C, THW75C or THHN90C.
2. Follow the instructions supplied by the appliance
manufacturer. See Fig. 5 and 6 for reference.
Fig. 5. Four-pin electrical plug connector.
Fig. 6. Electrical connection diagram.
ADJUSTMENTS AND FINAL
CHECKOUT
The following procedures are related to the adjustments on
the main gas valve. For adjustment of the other devices (i.e.,
pressure switches), refer to the instructions supplied with the
applicable device.
WARNING
Fire or Explosion Hazard.
Can cause serious injury, death or property
damage.
Only fully qualified, experienced flame safeguard
technicians should make adjustments on the valve.
Pressure Tap Points (Fig. 7)
The V4730A/V8730A, V4750A/V8750A, have a number of
connection points for measuring pressure and/or mounting a
pressure switch.
The following pressures can be measured:
1. Inlet pressure—tap on inlet flange and on side of valve
body (1,2).
2. Interim pressure—pressure between the two shutoff
valves (3).
3. Outlet pressure—tap from flange (4).
The corresponding numbers (2, 3) can be found on the side of
the valve.
NOTE: To mount the C6097 Pressure Switch, refer to
instructions in form 65-0237, furnished with the
switch.
Fig. 7. Pressure tap points.
Second Valve, Fast Opening
(V4730A/V8730A)
To adjust the flow rate:
1. Remove the flat, round cap from the cover.
2. Using a 3 mm (7/64 in.) hex wrench, turn the adjustment
screw counterclockwise to increase or
clockwise to decrease the flow rate.
3. Snap the cap back on the cover.
V1
(BLACK) 21
3
L2
M20583
(YELLOW)
(GREEN)
V2
(BLUE)
1
1FOR CONNECTION TO 1/2 INCH FLEXIBLE ELECTRICAL
CONDUIT ONLY. MAXIMUM TORQUE 65 INCH-POUNDS.
V1
1
3
V2
M20584
2
BLACK BLUE
YELLOW
4
1
23
3
2
M17985C
OPTIONAL
C6097
PRESSURE
SWITCH
P
P
V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES
65-0270—3 6
Second Valve, Slow Opening
(V4750A/V8750A)
Both the flow rate and the step pressure can be adjusted.
IMPORTANT
To ensure a satisfactory setting of the valve, the
pressure drop over the valve should be at least 10%
of the supply pressure or 1 in. w.c. (2.5 mBar),
whichever is greater.
To adjust the flow rate (Fig. 8 and 9):
1. Remove the cap from the top of the coil by loosening
both screws.
2. Place a wrench on the adjustment nut.
3. Turn the wrench counterclockwise to increase or
clockwise to decrease the flow rate.
Fig. 8. Removing the cap.
Fig. 9. Turning the adjustment nut.
To adjust the step pressure (FIg. 8 and 10):
1. Remove the cap from the top of the coil by loosening
both screws.
2. Place a screwdriver in the slot of the adjustment screw,
located in the center of the top of the valve.
3. Turn the screwdriver counterclockwise to
increase or clockwise to decrease step
pressure.
4. Replace the cap on top of the coil.
Fig. 10. Turning the step pressure adjustment screw.
Opening Speed Adjustment
Opening speed can be adjusted between one second
minimum and 90 second maximum (Fig. 11 and 12).
Fig. 11. Opening speed adjustment screw.
Fig. 12. Characterized opening.
M17979
A
M17980A
M17981
A
M17982B
SLOWER
OPENING
FASTER
OPENING
FLOW REGULATION
OPENING SPEED REGULATION
TIME M17983C
100% FLOW
0% FLOW
V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES
7 65-0270—3
Final Checkout of the Installation
Set the system in operation after any adjustment is completed
and observe several complete cycles to ensure that all burner
components function correctly.
OPERATION
The V4730A/V8730A, V4750A/V8750A are normally closed
valves. The valves open when energized and close when the
power is removed.
WARNING
Explosion Hazard and Electrical Shock Hazard.
Can cause explosion, serious injury or death.
1. Do not put the system into service until you have
satisfactorily completed the Valve Leak Test, all
applicable tests described in the Checkout section
of the instructions for the flame safeguard control
and any other tests required by the burner
manufacturer.
2. All test must be performed by a trained, experienced
flame safeguard technician.
3. Close all manual fuel shutoff valves immediately if
trouble occurs.
After the installation is complete, cycle the valve several times
with the manual fuel shutoff cock closed. Make sure the valve
functions properly. Also, perform the Valve Leak Test before
putting the valve into service.
Fig. 13 through 16 show the capacity of the valves with inlet
screens in place.
Fig. 13. Capacity of V4730A/V8730A; V4750A/V8750A 1/2 in. valves, with inlet screen.
100
CFH NATURAL GAS
PRESSURE
DROP
INCHES
W.C.
M19528
10 50 1000500 100005000
0.1
1
10
100
V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES
65-0270—3 8
Fig. 14. Capacity of V4730A/V8730A; V4750A/V8750A 3/4 in. valves, with inlet screen.
Fig. 15. Capacity of V473A0/V873A0; V4750A/V8750A 1 in. valves, with inlet screen.
100
CFH NATURAL GAS
PRESSURE
DROP
INCHES
W.C.
M19529
10 50 1000500 100005000
0.1
1
10
100
100
CFH NATURAL GAS
PRESSURE
DROP
INCHES
W.C.
M19530
10 50 1000500 100005000
0.1
1
10
100
V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES
9 65-0270—3
Fig. 16. Capacity of V4730A/V8730A; V4750A/V8750A 1-1/4 in. valves, with inlet screen.
Valve Leak Test (Fig. 17)
This is a test for checking the closure tightness of the gas
shutoff valve. It should be performed only by trained,
experienced flame safeguard technicians during the initial
startup of the burner system or whenever the valve is
replaced. It is recommended that this test also be included in
the scheduled inspection and maintenance procedures. For a
periodic inspection test, follow steps 1, 3, 4, 5, 8, 9, 10, 12, 13,
16 and 17.
1. De-energize the control system to make sure no power
goes to the valve (C, Fig. 10).
2. Close the upstream manual gas cock (A).
3. Make sure the manual test petcock (F) is closed in the
leak test tap assembly (D).
4. Remove the leak test tap plug and connect the test
apparatus to the leak test tap (D).
5. Close the downstream manual gas cock (E).
6. Open the upstream manual gas cock (A).
7. Run the valve to its open position (through the safety
system); then immediately de-energize the system to
close the valve.
8. Immerse an 1/4 in. (6 mm) tube vertically 1/2 in. (13
mm) into a jar of water.
9. Slowly open the manual test petcock (F).
10. When the rate of bubbles coming through the water
stabilizes, count the number of bubbles appearing
during a ten-second period. Each bubble appearing
during a 10 second period represents a flow rate of
0.001 cfh (28 cch).
11. Close the upstream manual gas cock (A).
12. Remove the leak test tap from the valve body.
13. Using a small amount of pipe sealant on the 1/8 in.
(3 mm) NPT plug, reinstall the plug in pressure tap
point P.
14. To test the second SSOV, remove the 1/8 in. (3mm)
NPT plug from the flange pressure tap point 4.
15. Install the leak test tap into pressure tap point 4.
16. Close the downstream manual gas cock E.
17. Immerse the 1/4 in. (6 mm) tube vertically 1/2 in.
(13 mm) into a jar of water.
18. Slowly open the manual test petcock (F).
19. When the rate of bubbles coming through the water
stabilizes, count the number of bubbles appearing
during a ten-second period. Each bubble appearing
represents a flow rate of 0.001 cfh (28 cch). See
Table 3.
20. Remove the leak test tap from the valve body.
21. Using a small amount of pipe sealant on the 1/8 in.
(3 mm) NPT plug, reinstall the plug in pressure tap
point 4.
Table 2. Maximum Bubbles per Pipe Size.
100
CFH NATURAL GAS
PRESSURE
DROP
INCHES
W.C.
M19531
10 50 1000500 100005000
0.1
1
10
100
Pipe Size (in.
NPT)
Maximum Seat
Leakage (UL)
Maximum Number
of Bubbles in 10
seconds
1/2 - 3/4 235 cch 6
1 275 cch 7
1-1/4 340 cch 8
V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES
65-0270—3 10
Fig. 17. Valve leak test.
After the Test
1. Close the upstream manual gas cock (A).
2. Close the manual test petcock (F), remove the test
apparatus, and close the leak test tap (D).
3. Make sure the downstream manual gas cock (E) is
closed.
4. Open the upstream manual gas cock (A) and energize
the valve through the safety system.
5. Test with rich soap and water solution to make sure
there is no leak at the test tap (D) or any pipe adapter/
valve mating surfaces.
6. De-energize the valve (C).
7. Open the downstream manual gas cock (E).
8. Restore the system to normal operation.
TROUBLESHOOTING
WARNING
Electrical Shock Hazard.
Can cause serious injury or death.
Use extreme caution while troubleshooting; line
voltage is present.
IMPORTANT
Do not replace the valve until all other sources of
trouble are eliminated.
Troubleshooting Procedure
If the valve does not open when the thermostat or controller
calls for heat:
1. Check for line voltage at the valve leadwires or terminal
block.
2. If there is no voltage at the valve leadwires or terminal
block, make sure:
a. line voltage power is connected to the master
switch.
b. master switch is closed and overload protection
(circuit breaker, fuse or similar device) has not
opened the power line.
3. If there is still no voltage at the valve leadwires or
terminal block, make sure all appropriate contacts in the
thermostat or controller, limits and flame safeguard
controls are closed. If one or more are open, determine
the cause(s); correct the trouble and proceed.
4. If there is proper voltage at the valve but the valve still
does not open, check for normal gas pressure.
5. If the valve still does not open, replace the valve.
If the valve does not close when one or more of the
appropriate contacts in the thermostat, controller, limits or
flame safeguard control is open:
1. Make sure the valve is wired in the correct circuit.
2. Open the master switch to remove power from the
valve.
3. If the valve closes now, check the wiring for the valve
and correct the wiring as necessary.
4. Check for a short in the electrical circuit and repair it as
necessary.
SERVICE INFORMATION
WARNING
Explosion Hazard and Electrical Shock Hazard.
Can cause explosion, serious injury or death.
Turn off gas supply and disconnect all electrical power
to the valve before servicing.
IMPORTANT
Only trained, experienced flame safeguard control
technicians should attempt to service or repair flame
safeguard controls and burner assemblies.
Scheduled Inspection and Maintenance
Set up and follow a schedule for periodic inspection and
maintenance, including the burner, all other controls and the
valves. It is recommended that the valve leak test in the
Checkout section be included in this schedule. Refer to the
instructions for the primary safety control(s) for more
inspection and maintenance information.
M9547F
GAS
SUPPLY
UPSTREAM
MANUAL
GAS COCK
DOWNSTREAM
MANUAL
GAS COCK
BURNER
DABC E
F
PRV
MANUAL
TEST
PETCOCK
SSOV
1/4 IN. (6 MM)
FLEXIBLE
TUBING
1/4 IN. (6 MM)
ALUMINUM OR
COPPER PILOT
TUBING JAR OR GLASS
WITH WATER
CUT AT
45 DEGREE
ANGLE
CAN ALSO BE A PERMANENT PETCOCK.
PRV = PRESSURE REGULATING VALVE.
SSOV = SAFETY SHUTOFF VALVE.
USE THE DOWNSTREAM TAP ON THE SS0V.
1
2
3
4
4
2 3
1
1
2(13 MM)
LEAK
TEST
TAP
11 65-0270—3
65-0270—3 G.R. Rev. 11-04 www.honeywell.com
Automation and Control Solutions Honeywell International Honeywell Europe S.A. Honeywell Latin American
Honeywell International Inc. Honeywell Limited-Honeywell Limitée Control Products 3 Avenue du Bourget Region
1985 Douglas Drive North 35 Dynamic Drive Honeywell Building 1140 Brussels 480 Sawgrass Corporate Parkway
Golden Valley, MN 55422 Scarborough, Ontario 17 Changi Business Park Central 1 Belgium Suite 200
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