Back pressure valves Long life diaphragm with range of 0-150 PSIG. Air release, optional gauge port and available in PVC, CPVC, PVDF, Teflon, Polypropylene, stainless, alloy 20 and hastelloy C. & sizes are available from 1/4" to 2' NPT. Our color coded handles indate size, and they are also available for higher pressures and temperatures.
