Introduction to the principle and structure of gas pressure reducing valve
Classification:
Release Time：2017-12-11
1. The medium pressure at the front of the valve enters the body cavity from the opening gap between the valve disc and the sealing ring of the valve body so that the medium pressure flows into the combination box of the bellows. The bellows and the spring are compressed by the medium pressure. The valve disc moves with the valve stem, and the valve disc closes the sealing ring of the valve body, cutting off the medium before the valve without supplementing the medium pressure after the valve. When the pressure of the medium after the valve is reduced, the bellows is deformed by the radial force of the adjusting spring, and the valve stem opens the disc. Make the medium through the valve body seal ring to supplement the valve after the pressure drop. 2. The gas pressure reducing valve is composed of valve body, valve cover, valve clack, valve body sealing ring, valve stem, bellows,
1. The medium pressure at the front of the valve enters the body cavity from the opening gap between the valve disc and the sealing ring of the valve body so that the medium pressure flows into the combination box of the bellows. The bellows and the spring are compressed by the medium pressure. The valve disc moves with the valve stem, and the valve disc closes the sealing ring of the valve body, cutting off the medium before the valve without supplementing the medium pressure after the valve. When the pressure of the medium after the valve is reduced, the bellows is deformed by the radial force of the adjusting spring, and the valve stem opens the disc. Make the medium through the valve body seal ring to supplement the valve after the pressure drop.
2. The gas pressure reducing valve is composed of valve body, valve cover, valve flap, valve body sealing ring, valve stem, bellows, adjusting spring and other parts. The inlet of body cavity is assembled with valve flap, valve body sealing ring and auxiliary spring. The auxiliary spring is to keep the valve flap and valve body sealing ring automatically sealed. The outlet body cavity is assembled with elastic sealing elements (bellows) to ensure the leakage of medium pressure behind the valve and compensate for overcoming pressure unevenness. The screw is to adjust the working performance of the spring loaded pressure reducing valve.
Input pressure change of gas pressure reducing valve:
The characteristic of output pressure fluctuation caused by input pressure fluctuation when the flow rate g is constant. The smaller the output pressure fluctuation, the better the characteristics of the pressure reducing valve. The output pressure must be lower than the input pressure-the fixed value is basically unchanged with the input pressure.
The opening of the opening and closing parts in the control valve body is used to adjust the flow of the medium to reduce the pressure of the medium. At the same time, the opening of the opening and closing parts is adjusted by the action of the pressure behind the valve to keep the pressure behind the valve within a certain range. Cooling water is sprayed into the valve or after the valve to reduce the temperature of the medium. This valve is called a decompression and temperature reduction valve.
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