... contact:ethanvuv Detailed Product Description:Working Pressure: 15MpaNominal Diameter: 4 mm....Medium: O2,N2,AIR,CO2Outlet Thread: G5/8 ... ....Inlet Thread : GB8335 PZ27.8,or 3/4-14NGTSafety Device: Standard. Safeguard :18-22.5Mpa We are ... valves for various gas cylinders. It mainly produces gas cylinder valves, gas pipe valves, industrial gas decompressors, civil liquid gas boosters, brass ball ...