The pressure reducing valve is a valve that regulates the inlet pressure to a certain desired outlet pressure and relies on the energy of the medium to keep the outlet pressure automatically stable. From a fluid mechanics point of view, the pressure reducing valve is a throttling element whose local resistance can be changed. That is, by changing the throttle area, the flow velocity and the kinetic energy of the fluid are changed, resulting in different pressure losses, thereby achieving the purpose of decompression. Then, depending on the adjustment of the control and regulation system, the fluctuation of the pressure behind the valve is balanced with the spring force, so that the pressure behind the valve remains constant within a certain error range.

The high pressure relief valve uses the opening degree of the opening and closing element in the control valve body to regulate the flow of the medium and reduce the pressure of the medium. At the same time, the opening degree of the opening and closing piece is adjusted by the action of the valve pressure to keep the pressure behind the valve at a certain level. Within the scope, in the event of constant changes in import pressure, maintain the export pressure within the set range and protect the subsequent production equipment.

The high pressure relief valve is an essential part of the pneumatic control valve. Its main function is to depressurize and stabilize the pressure of the air source to a fixed value, so that the regulator valve can obtain a stable air source power for adjustment and control.

According to the structure can be divided into diaphragm type, spring film type, piston type, lever type and bellows type; according to the number of seats can be a single seat and two seat type; according to the position of the valve can be divided into positive action type And reaction type.

The operation of the high pressure relief valve is controlled by the pressure behind the valve. When the pressure sensor detects that the valve pressure indication increases, the valve opening of the pressure reducing valve decreases; when the pressure reducing valve is detected, the pressure decreases and the valve opening of the pressure reducing valve increases to meet the control requirements.

High Pressure Relief Valve - The valve's decompression ratio must be somewhat higher than the system value; it should be able to respond to positive or negative control signals even at maximum or minimum flow. These valves should be selected for the useful control range, ie 20% to 80% of the maximum flow. Normal is an equal ratio or has a comparable characteristic. These types of valves inherently have the optimal flow characteristics and flow rates required for proportional control.