... valve,switch,Valve position transmitter,Emergency action equipments,hand wheel and so on.Air connection Rc 1/4",G1/4",G3 ... , ANSI,JIS,DIN Note:working pressure,work temperature,Nominal diameter, and so on. Can changed according to your requirements.Materials for ... :hard chromium plating,surfacingNI60,Hard alloy spray welding,Spray welding tungsten carbide;lFilling materials: PTFE, flexible graphite.