Advertisement
Quick Links
Class A Double Block and Pressure
V4750B/V8750B
APPLICATION
The V4730B/V8730B, V4750B/V8750B Class A Double Block
Pressure Regulating Valves are used for pre-mix burner
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.
® U.S. Registered Trademark
© 2004 Honeywell International Inc.
All Rights Reserved
V4730B/V8730B, V4750B/V8750B
Regulating Safety Shutoff Valves
V4730B/V8730B
FEATURES
• Class A double block safety shutoff valves for control
of pre-mix gaseous fuels in gas consuming appliances
in accordance with international standards.
• Provides safety shutoff and pressure regulation
control of main gas flow.
• Main body with two single-seat shutoff valves.
• Provides for mounting optional flanged pressure
switches.
• Closing time: < 1 second.
• Coils suitable for permanent energization.
• 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, pre-wired with
36 in. (914 mm) leads, included.
• Adjustable maximum flow rate limiter (all models).
• Adjustable step opening pressure and opening timing
(V4750B/V8750B 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.
Application ........................................................................
Features ...........................................................................
Specifications ...................................................................
Ordering Information .........................................................
Installation ........................................................................
Adjustments and Final Checkout ......................................
Operation ..........................................................................
Troubleshooting ................................................................ 10
Service Information .......................................................... 10
PRODUCT DATA
Contents
1
1
2
2
4
7
9
65-0275—2
Advertisement
Related Manuals for Honeywell V4730B
Summary of Contents for Honeywell V4730B
- Page 1 APPLICATION 36 in. (914 mm) leads, included. • Adjustable maximum flow rate limiter (all models). The V4730B/V8730B, V4750B/V8750B Class A Double Block • Adjustable step opening pressure and opening timing Pressure Regulating Valves are used for pre-mix burner (V4750B/V8750B only).
- Page 2 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...
- Page 3 V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES Valve Position Indicator Lamps: Table 2. Flange Kits. Inboard (closest to the valve body)—V1. Part No. Size NPT in inches Outboard—V2. 32006652-001 NOTE: If the inboard lamp is lighted, V1 is open; if both 32006652-002 lamps are lighted, the valve is completely open.
- Page 4 V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES Capacity 7-1/4 (185) Fig. 5 through 8 illustrate the capacity for the four valve sizes. 5-1/4 (133) INSTALLATION 4-7/32 (107) 1-27/32 (48) When Installing this Product… 1. Read these instructions carefully. Failure to follow them...
- Page 5 V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES PRESSURE DROP INCHES W.C. 1000 5000 10000 CFH NATURAL GAS M20705A Fig. 5. Capacity of V4730B/V8730B; V4750B/V8750B 1/2 in. valves. PRESSURE DROP INCHES W.C. 1000 5000 10000 CFH NATURAL GAS M20706A Fig.
- Page 6 V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES PRESSURE DROP INCHES W.C. 1000 5000 10000 CFH NATURAL GAS M20707A Fig. 7. Capacity of V4730B/V8730B; V4750B/V8750B 1-in. valves. PRESSURE DROP INCHES W.C. 1000 5000 10000 CFH NATURAL GAS M20708A Fig.
- Page 7 V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES Pressure Tap Points (Fig. 11) Wiring 1. Use 14, 16 or 18 AWG copper conductor, 600 volt The V4730B/V8730B, V4750B/V8750B, have a number of insulation, moisture-resistant wire for line voltage connection points (1/8 in.
- Page 8 V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES Second Valve, Slow Opening To adjust the step pressure (FIg. 12 and 14): (V4750B/V8750B) 1. Remove the cap from the top of the coil by loosening both screws.
- Page 9 V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES 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...
- Page 10 V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES 19. Remove the leak test tap from the valve body. 1. Check for line voltage at the valve leadwires or terminal 20. Using a small amount of pipe sealant on the 1/8 in.
- Page 11 V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES 9. Install O-rings into O-ring grooves provided on valve 11. Apply power. body (one O-ring per groove). 12. Turn on the main gas supply. 10. Mount the gas valve between the flanges, using the 13.
- Page 12 Automation and Control Solutions Honeywell International Honeywell Europe S.A. Honeywell Latin American Region Honeywell International Inc. Honeywell Limited-Honeywell Limitée Control Products 3 Avenue du Bourget 1985 Douglas Drive North 35 Dynamic Drive Honeywell Building 1140 Brussels 480 Sawgrass Corporate Parkway...