... plug,Valve seat: stainless steelValve clack: alloy and fluororubberValve port: stainless steelDiaphragm: nitrile rubberExecutive StandardRefer to CJ274-2008 «Town gas pressure regulator»Character1 ... types of valves, gas pressure regulators, integrating development and production together. Our main products include pressure regulator, steel flange, Stop Valve, ball valve, Filter, insulating ...