Basic knowledge of gas pressure reducing valves / pressure regulators
Through the introduction of the working principle, installation and maintenance, and fault analysis and treatment of gas pressure reducing valve (hereinafter referred to as pressure reducing valve), this paper guides the users to use the gas pressure reducing valve correctly, improve safety awareness and prevent gas accidents. First, the working principle of the pressure reducing valve
The pressure reducing valve is an important gas equipment installed in the liquefied gas cylinder angle valve connecting the angle valve and the hose to reduce the output pressure and stabilize the output pressure. It has simple structure, stable pressure, light weight and adjustable installation. Convenience and other advantages. Mainly by the air inlet, air outlet, hand wheel, upper valve cover, lower valve cover, air inlet, breathing hole, upper air chamber, decompression chamber, valve pad, lever, rubber film, spring, adjusting screw and other components composition. Its structural composition is as shown in the schematic. Specializing in the sale of gas pressure reducing valves, welcome to buy! We know that when liquefied petroleum gas comes out of the cylinder, the high pressure gas first passes through the intake pipe to the decompression chamber. When the user turns off the switch of the gas appliance, the liquefaction enters the decompression chamber. As the petroleum gas increases, the pressure rises, and the rubber film pressed by the spring is pushed up, and part of the air existing in the upper air chamber is discharged from the valve body through the breathing hole. In this way, the lever is forced to move upward, and the valve port is closed by leverage, the passage of the liquefied petroleum gas inlet is cut off, and the pressure at the outlet of the pressure reducing valve is no longer raised. When the switch of the gas appliance is turned on, the liquefied petroleum gas flows out from the pressure reducing valve, the pressure in the decompression chamber is lowered, the rubber film is concave, the lever is moved downward, and the outside air enters the upper air chamber from the breathing hole, so that the valve cushion is oriented In the middle movement, the intake nozzle becomes larger, the intake air amount increases, and the pressure rises. This repeated adjustment process keeps the pressure in the decompression chamber constant, that is, regardless of whether the intake pressure is high or low, the outlet pressure is always stable, and thus until the buck and the voltage are stabilized.
Second, the installation and maintenance of the pressure reducing valve
When the user uses the gas appliance, the pressure reducing valve is often disassembled. When installing, the connection (installation) of the pressure reducing valve and the cylinder is correct and safe. It is essential for the safety of use. The specific installation and maintenance requirements are as follows:
1, the installation method
After changing the cylinder, when installing the pressure reducing valve, pay attention to the alignment and right thread, and then rotate the handwheel in the reverse direction (counterclockwise direction). When rotating, the force is not too strong, and the correct hand sensing is easy. Otherwise, the thread may be misaligned. Do not force it in at this time. Recalibrate before screwing in until it is tightened. If the installation is correct, gently shake the pressure reducing valve body by hand, it will not shake left or right or feel loose; if the installation is not good, even if the handle wheel is screwed, but the thread is not correct, so gently shake the pressure reducing valve body will also There is a sense of looseness.
2, leak detection method
In order to ensure safe use, after the pressure reducing valve is installed, the soapy water can be brushed at the interface for inspection to see if there is any air leakage. For example, the pressure reducing valve with pressure display can close the angle valve and smell if there is any leaking smell and observe whether the pointer changes. The rubber sealing ring at the end of the pressure reducing valve is an important part to prevent air leakage. Every time the liquefied petroleum gas cylinder is replaced, it should be checked whether the sealing ring is intact. If it is deformed or damaged, it must be replaced before it can be used. . According to the analysis of poisoning and explosion accidents in the past, more than 60% of them are caused by the failure of the pressure relief valve or the loss or damage of the rubber seal. Therefore, it is necessary to draw lessons and pay attention. Through the introduction of the working principle, installation and maintenance, and fault analysis and treatment of gas pressure reducing valve (hereinafter referred to as pressure reducing valve), this paper guides the users to use the gas pressure reducing valve correctly, improve safety awareness and prevent gas accidents.
In recent years, gas leakage accidents of residents have occurred, which seriously threatens the safety of people's lives and property. However, when we exclude the user's lack of knowledge about gas appliances, we analyze the truth of the accident. We also found that an important reason is that the correct use of the pressure relief valve has not yet received great attention. According to statistics, 80% of gas accidents are caused by the quality of the pressure reducing valve itself and improper use by users. Through the introduction of the working principle, installation and maintenance, and fault analysis and treatment of the gas pressure reducing valve, the author guides the users to use the gas pressure reducing valve correctly, improve safety awareness and prevent gas accidents.
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Jiangmen Duramp Electric Co., Ltd , https://www.durampled.com