RETENTION VALVE / , TYPE: ANTI RETURN / , NOMINAL DIAMETER: 2” / , MATERIAL BODY: BRASS / , SHUTTER MATERIAL: BRASS / , SEAT MATERIAL: BRASS / , FENCE: VITON / , STANDARD/BODY CLASS: 1500 LBS / , RETURN TYPE: SPRING / , TYPE OF ASSEMBLY: LINE / , END: THREADED / , THREAD: NPT / , FACE TO FACE: 102,00 MM / , FLUID: OXYGEN / , WORKING TEMPERATURE: ?20 TO 400 DEGREES CENTIGRADE / , WORKING PRESSURE: 1500 PSI / , OPENING PRESSURE: 0.5 TO 1 PSI /