All check valves in this series are ductile iron for 300 psi working pressure with a steel piston, teflon seat disc, and forged steel companion flanges for iron pipe. Copper connectors are available for use with halo-carbon refrigerants. A seal cap is also provided for halocarbon use.
These valves are equipped with a spring to close for liquid and gas refrigerants. They are designed for outlet lines of dump traps, defrosting liquid return lines, liquid pump discharge, relief, pressure reducing, and for compressor discharge lines.