... We have our own research and development team to research SF6 gas valves. We adopt advanced craft to design and manufacture small ... ISO9001 quality system.Parameters Pressure level,PN64Nominal diameter,DN20Seal property,gas leakage≤1×10-15 MPa·m3/sOperating temperature,-40° ... 2,M33×2 Accessories Metal protection caps(LY12-CZ),O-ring,Plastic protection caps,Meter connector,Inflatable valve gastight Self- ...