CHECK VALVE TYPE: NON RETURN; NOMINAL DIAMETER: 1/4; BODY MATERIAL: BRASS; PLUG MATERIAL: BRASS; SEAT MATERIAL: BRASS; SEALING: KALREZ; BODY STANDARD/CLASS: 3000 PSIG; RETURN TYPE: SPRING; MOUNTING TYPE: LINE; END: THREADED; THREAD: NPT 1/4. X 18 WIRES/INCH; FACE TO FACE: 57.15 MM; FLUID: OXYGEN; WORKING TEMPERATURE: MAXIMUM 288 DEGREES CELSIUS; WORKING PRESSURE: 3000 PSIG; OPENING PRESSURE: 0.1 PSIG TO 25 PSIG; MANUFACTURER / REFERENCE CIRCLE SEAL CONTROLS: 265B-2PP