2“ DIAPHRAGM CHECK VALVE, BASIC NAME OF THE VALVE MODIFIER NAME CONTROL DIAPHRAGM MATERIAL PVDF-POLYVINYLIDENE FLUORIDE PVDF BODY LINING FLANGE END STANDARD ASME B16.5 PRESSURE CLASS 150 DIAPHRAGM MATERIAL PTFE/EPDM ALL-OR-NOTHING CONTROL REDUCED FLOW PNEUMATIC ACTUATOR DIRECT ACTION (AIR TO CLOSE) FAILURE CONDITION NORMAL OPEN NOMINAL DIAMETER 2“ COMMERCIAL REFERENCE GEMU-R69050D3975522HDN