JASC Water Cooled Liquid Fuel Check Valve Description
This state-of-the-art application is a modified version of the JASC Liquid Fuel Check Valve that incorporates active cooling of the check valve’s external housing. Because the unit is a drop-in replacement for the liquid fuel check valve, no changes to the fuel lines are necessary. 

Design Features & Benefits
The cooling medium of water helps to maintain an internal check valve temperature that is below the coking threshold of diesel fuel (approx. 250 °F) while operating in an ambient environment in excess of 500 °F. Successful laboratory tests have been conducted with water temperatures up to 150 °F, water pressure at 40 psig, and as little flow as 1/4 GPM flow rate, while still maintaining an internal check valve temperature below the coking threshold.

JASC has found from engine tests that raising the cooling water flow to 1.0 GPM also enhances cooling of the check valve's liquid fuel inlet and exit line when operating the engine on gaseous fuels for extended periods of time.

Product Specifications

Inlet Pressure: 0-1225 PSIG (800 PSIG Typical)
Inlet Temperature: 60 °F to 250 °F
Flow Range: 0.5-15.0 GPM
Check Pressure: 300 PSIG
Maximum Ambient Temperature: 400 °F
Maximum Pressure Drop: 170 PSID
Pressure Drop Tolerance: 155-170 PSID
Operating Flow: 15.00 GPM
Crack Pressure: 114-126 PSID
Cooling Flow: 1.0 GPM at 20 PSI drop from water inlet to water outlet
Leakage in Check/Flow Direction: ANSI Class 6 or better Soakback Temperature: 700 °F
Contamination Level: 75 microns absolute, 98.6% 39 micron or less, 4 mg/100ml

Construction Materials

Stainless Steel
Vespel