Oxygen Valve, QF-2 1. With safety 2. Working pressure: 15 Mpa 3. Good quality and with cheaper price 4. Medium:O2, N2, Air Oxygen Valve, QF-21. Medium:O2,Air,N22. Working Pressure:15Mpa3. Nominal Diameter:DH4mm4. Outlet thread: G5/8"-RH-EXT5. Inlet thread: PZ27.806. Safty device pressure: 21±1.5MpaQuality certificate:SQC certificate for quality management system,has complied with the requirements ...