TheHANTEMP Controls SCVis a refrigeration check valve for weld inline installation. Constructed of stainless steel, it is designed to prevent the reverse flow of refrigeration liquid or gas. All stainless steel seating is for lifetime use.FEATURES316L stainless steel construction requires no gasketsCan be welded directly in-lineRated for 2000 psig SWPAvailable for socket or butt-weld connectionsODS Connections to fit copper piping also available