A three-piece tubing check valve with compression tube ends, supplied complete with nuts and ferrules and offers maximum flow with minimal pressure drop
.125 PSI springs are not recommended for installations with flow vertical down.
Seat materials other than “metal-to-metal” have a maximum pressure rating of 1500 PSI. “Metal-to-Metal” and PTFE seats are not resilient. See allowable leakage (New window will open).
Fitting o-rings are the same as the seat for standard seat materials. For “Metal-to-Metal” seated valves, end fittings o-rings are Buna-N for brass and carbon steel valves and Viton for stainless steel valves. For “KZ” and “AS” seated valves, end fitting o-rings are PTFE.