200bar oxygen and strong oxidation gas cylinder valve sealing materials, liquefied petroleum cylinder valve handwheel must be used flame retardant materials. The main performance test items before delivery are air tightness test, safety device action test;
Metallic and non-metallic materials in contact with gases in the working environment shall be compatible with the medium contained in the cylinder, as specified in ISO 11114-1 and ISO 11114-2.
The mechanical properties of metal parts after forging, pressing and machining should meet the design strength requirements of the valve.
When brass is used for dissolving acetylene cylinder valves, the copper content should not exceed 65.0%.
Liquid ammonia cylinder valves should not be made of copper alloy.
Liquid chlorine bottle valves should be made of materials resistant to hydrochloric acid corrosion.
The valve body material
The valve body material should not be changed from plastic to brittle materials (such as copper alloy, austenitic stainless steel, aluminum alloy and nickel alloy, etc.), and should meet the design strength requirements of the valve body, the performance of the material should meet the corresponding national standards.
Cylinder valve refers to the valve installed on the cylinder to control gas on and off and flow rate. Also known as “bottle valve”.