Steam pressure reducing valveIt adjusts the flow rate of the medium by controlling the opening of the opening and closing components inside the valve body, reducing the pressure of the medium. At the same time, the opening of the opening and closing components is adjusted by the pressure behind the valve, keeping the pressure behind the valve within a certain range. In the case of continuous changes in inlet pressure, the outlet pressure is maintained within the set range to protect the subsequent living and production equipment.The operation of the steam pressure reducing valve is controlled by the pressure behind the valve. When the pressure sensor detects an increase in valve pressure indication, the opening of the pressure reducing valve decreases; When the pressure decreases after detecting the pressure reducing valve, the opening of the pressure reducing valve increases to meet the control requirements.
The working principle of steam pressure reducing valve is as follows:
The working principle of a pressure reducing valve is that a steam pressure reducing valve reduces the inlet pressure to a desired outlet pressure by throttling the opening and closing components, and maintains a stable outlet pressure. When the steam pressure reducing valve leaves the factory, the regulating spring is in an uncompressed state. At this time, the main valve disc and the auxiliary valve disc are in a closed state. When in use, rotate the regulating screw clockwise to compress the regulating spring, causing the diaphragm disc to move and open the auxiliary valve disc. The medium enters the upper side of the piston from hole a through the auxiliary valve seat to hole b. Under the pressure of the medium, the piston moves downward to push the main valve disc away from the main valve seat, allowing the medium to flow behind the valve. At the same time, it enters the lower part of the diaphragm through hole C. When the pressure behind the valve exceeds the set pressure, the diaphragm is pushed upward to compress the regulating spring, and the auxiliary valve disc moves in the closing direction, reducing the medium flowing into the upper part of the piston and the pressure. At this time, the main valve disc moves up and down under the force of the main valve disc spring, reducing the gap between the main valve disc and the main valve seat, and reducing the medium flow rate, causing the pressure behind the valve to drop to a new equilibrium. Conversely, when the pressure behind the valve is lower than the set pressure, the gap between the main valve disc and the main valve seat increases, and the medium flow rate also increases, causing the pressure behind the valve to increase and reach a new equilibrium.
Steam pressure reducing valves should generally be installed horizontally in pipelines. The steam pressure reducing valve is a component of the pneumatic control valve, mainly used to regulate the gas sourceReduce the pressure and stabilize it to a constant value, so that the regulating valve can obtain stable air source power for regulating control.