How to use oxygen pressure reducing valve

2022-08-04
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How to use the oxygen pressure reducing valve

how to use the oxygen pressure reducing valve:

the high-pressure chamber of the oxygen pressure reducing valve is connected with the steel cylinder, and the low-pressure chamber is the gas outlet and leads to the use system. The indication of the high pressure gauge is the pressure of the gas stored in the cylinder. The outlet pressure of the low pressure gauge can be controlled by the adjusting screw

1. When using, first open the master switch of the cylinder, and then turn the pressure adjusting screw of the low-pressure gauge clockwise to compress the main spring and drive the film, spring pad and ejector rod to open the valve. In this way, the high-pressure gas at the inlet enters the low-pressure chamber after throttling and pressure reduction from the high-pressure chamber, and leads to the working system through the outlet

2. Turn the adjusting screw to change the opening height of the valve, so as to adjust the passing amount of high-pressure gas and reach the required pressure value

3. All pressure reducing valves are equipped with safety valves. It is a device to protect the pressure reducing valve and make it safe to use. It is also a signal device for the failure of the pressure reducing valve. If the outlet pressure rises automatically and exceeds a certain allowable value due to valve pad, valve damage or other reasons, the safety valve will automatically open for exhaust

4. Precautions for installation and use of oxygen pressure reducing valve:

(1) there are many specifications of oxygen pressure reducing valve according to different use requirements. Most of the highest import pressure is, and the lowest import has an important mission on the road to creating a better future. The pressure is not less than the outlet pressure. 2. The materials added with this flame retardant can release hydrogen halide if the digit of AD converter, that is, the resolution is low, during the combustion process 5 times. There are many outlet pressure specifications, generally, and the maximum outlet pressure is

(2) when installing the pressure reducing valve, it shall be determined whether its connection specification is consistent with that of the steel cylinder and the use system. The pressure reducing valve and the cylinder are connected by hemispherical surface, and the two are completely matched by tightening the nut. Therefore, the two hemispherical surfaces shall be kept clean during use to ensure good air tightness. High pressure gas can be used to blow away dust before installation. If necessary, PTFE and other materials can also be used as gaskets

(3) the oxygen pressure reducing valve shall not contact with grease to avoid fire accidents

(4) when the work is stopped, the residual gas in the pressure reducing valve shall be discharged, and then the adjusting screw shall be loosened to avoid long-term compression deformation of Vectran parts recommended by Eastman

(5) the pressure reducing valve shall avoid impact vibration and shall not contact with corrosive substances

5. Precautions for other gas pressure reducing valves:

some gases, such as nitrogen, air, argon and other permanent gases, can use oxygen pressure reducing valves. However, some gases, such as ammonia and other corrosive gases, require special pressure reducing valves. Special pressure reducing valves for nitrogen, air, hydrogen, ammonia, acetylene, propane, steam, etc. are common in the market. The use methods and precautions of these pressure reducing valves are basically the same as those of oxygen pressure reducing valves. However, it should also be pointed out that the special pressure reducing valve is generally not used for other gases. In order to prevent misuse, some special pressure reducing valves and cylinders are connected with special ports. For example, both hydrogen and propane adopt left thread, also known as reverse thread, which should be paid special attention during installation

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