3700-510 Series Low Pressure Fuel Gas Regulator – Cast Zinc

A general purpose fuel gas regulator designed for low inlet pressure and low delivery pressure applications with fuel gases with vapor pressures below 250 psig.
NOTE: Photo does not show the CGA 510 inlet connection.

Applications

• Control of constant fuel burner flame.
• Inert gas blanketing at low pressures.

Design Features

• Zinc body
• Rubber diaphragm
• Porous metal filter protects seat from contamination
• CGA 510 inlet connection
• 1/4” NPTM outlet connection with loose hose barb
• Pressure adjusting screw protected by “security cap”

Materials of Construction

• Gauges: Brass
• Body: Cast zinc
• Bonnet: Die cast zinc
• Diaphragm: Natural rubber
• Seat: Natural rubber
• Seals: Natural rubber

Specifications

• Maximum Inlet Pressure: 250 psig (1,725 kPa)
• Maximum Flow Rate (At 200 psig, N2):
Model 3701A-510: Less than 35 SLPM
Model 3702-510: 260 SCFH (123 SLPM)
Model 3703-510: 350 SCFH (165 SLPM)
• Flow Capacity (Cv): 0.8
• Operating Temperature: -40°F to 150°F (-40°C to 65°C)
• Porting (Regulator Body): 1/4” NPT Female
• Porting Configuration: 1 High, 1 Low
• Integral Relief Valve:
Model 3701A-510: 17″ wc to 3 psig above set point
Model 3702-510: 6-9 psig
Model 3703-510: None

Instructions