The high pressure chamber of the oxygen valve is connected to the cylinder, and the low pressure chamber is a gas outlet and leads to the use system. The indication of the high pressure gauge is the pressure of the stored gas in the cylinder. The outlet pressure of the low pressure gauge can be controlled by an adjustment screw. When the oxygen valve is used, first open the main switch, then turn the low pressure gauge pressure adjusting screw clockwise to compress the main spring and drive the film, the spring block and the ejector to open the valve. The imported high-pressure gas is depressurized by the high-pressure chamber and then enters the low-pressure chamber and leads to the working system through the outlet. Turn the adjusting screw to change the height at which the valve opens, thereby adjusting the throughput of the high pressure gas and achieving the desired pressure value.
The oxygen valve is fitted with a safety valve. It is a device that protects the pressure reducing valve and makes it safe to use, and it is also a signal device for the failure of the pressure reducing valve. If the outlet pressure rises by itself and exceeds a certain permissible value due to damage to the valve mat, valve or other reasons, the safety valve will automatically open the exhaust. This type of valve should generally be installed horizontally in the pipeline.
How to use the oxygen valve:
(1) Oxygen pressure reducing valves are available in many sizes depending on the requirements of use. The highest import pressure is mostly, the minimum import pressure is not less than 2.5 times the export pressure. There are many export pressure specifications, generally, the highest outlet pressure is;
(2) When installing the pressure reducing valve, make sure that the connection specifications are consistent with the cylinder and the joint of the system. The pressure reducing valve is connected to the cylinder by a hemispherical surface, and the nut is fully fitted by a tightening nut. Therefore, the two hemispheres should be kept clean during use to ensure a good airtight effect. High pressure gas can be used to blow off dust before installation. If necessary, a material such as polytetrafluoroethylene may be used as the gasket;
(3) Oxygen valves should be strictly prohibited from contact with grease to avoid fire accidents;
(4) When stopping the work, the residual gas in the pressure reducing valve should be drained, and then the adjusting screw should be loosened to prevent the elastic component from being deformed by pressure for a long time;
(5) The oxygen valve should avoid impact vibration and should not be in contact with corrosive substances.
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