Piston type pressure reducing valve

Product Introduction of Piston Pressure Reducing Valve

Purpose and main performancePiston type pressure reducing valve is suitable for water, steam, and air medium pipelines. By adjusting the inlet pressure to a certain required outlet pressure, when the inlet pressure and flow rate change, the outlet pressure is automatically maintained within a certain range by the energy of the medium itself. However, the difference between the inlet pressure and the outlet pressure must be ≥ 0.2MPA/CM

Working principle and structureWhen the 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 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 towards the back of 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 is pushed up and down by the spring force of the main valve disc, reducing the gap between the main valve disc and the main valve seat, reducing the medium flow rate, and causing the pressure behind the valve to decrease 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

Outline dimension diagram of piston pressure reducing valve

Main components of piston pressure reducing valve

Connection size of piston pressure reducing valve(Flange size according to JB/T79-94 standard)

Ordering Notice:
1、 ①Piston type pressure reducing valveProduct Name and Model ②Piston type pressure reducing valveCaliber ③Piston type pressure reducing valveDo you have any attachments so that we can make the correct selection for you.
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3、 When the usage situation is very important or the environment is complex, please provide design drawings and detailed parameters as much as possible, and our steel valve experts will review and control them for you.