Gas Valve, Oxygen Valve, Cylinder Valve manufacturer / supplier in China, offering Manual Control with Simple Operation Logic Specialized for CNG Vehicle Conversion Systems High-Strength Brass Material Adapted to Gas Media, Toroidal Space-Saving Donut Design High-Strength Lightweight Aluminum Alloy Material Multi-Size Specification Compatibility, Easy-Inspect Light-Weight LPG Composite Gas Cylinder, Fire-Burn Safe Gas Vessel for RV Caravan, Marine Boat and Street Food Stall and so on.