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Heavy Duty. Dirt-Resistant. Tough.
Valves open when inlet pressure exceeds outlet pressure (1 psid [.07 bar] minimum), thereby lifting the piston/seat assembly and allowing flow through the valve.
When inlet pressure and outlet pressure are equalized, the weight of the piston/seat assembly causes the valve to close.
The HCK1 piston-type check valve prevents reverse flow of refrigerant in liquid, discharge, suction, and hot gas lines. It is an ideal valve where constant pulsating of gas or liquid is present, or where a manual opening of the valve is desirable. This valve is suitable for ammonia, R22, R134a, CO2 and other common refrigerants.
This normally closed valve requires very little pressure drop to operate. Valve sizes ¾˝ thru 1¼˝ have spring-assisted closing. Valve sizes 1½˝ thru 6˝ have a special, spool-type, dirt-resistant piston/seat. A manual opening stem allows positive opening during servicing or troubleshooting the system.
