Working Principle Overview
The pressure holding valve maintains the pressure stability in the system by controlling the flow of the fluid. When the system pressure decreases, the pressure holding valve will automatically increase the flow to supplement the pressure; when the system pressure is too high, it will reduce the flow to reduce the pressure. This adjustment is dynamic and can be automatically adjusted as the system working conditions change.
Flow Adjustment Mechanism
Pressure Monitoring and Feedback:
The pressure holding valve is usually equipped with a pressure sensor or a structure that uses fluid pressure to directly act on the valve core to monitor the pressure value in the system in real time.
When the monitored pressure deviates from the preset set value, the pressure holding valve will trigger the flow adjustment mechanism.
Valve Core Position Adjustment:
The valve core of the pressure holding valve is the key component of its flow adjustment. The position of the valve core determines the flow area of the fluid, thereby affecting the flow rate.
When the system pressure is lower than the set value, the pressure holding valve will adjust the valve core position to increase the flow area and allow more fluid to enter the system to increase the flow and increase the pressure.
On the contrary, when the system pressure is higher than the set value, the pressure-maintaining valve will adjust the valve core position, reduce the flow area, limit the inflow of fluid, and thus reduce the flow and pressure.
Relationship between flow and pressure:
In the pressure-maintaining valve, there is a certain relationship between flow and pressure. Usually, when the pressure decreases, the flow needs to be increased in order to maintain the pressure stable; when the pressure increases, the flow needs to be reduced.
This relationship is achieved through the pressure feedback mechanism inside the pressure-maintaining valve and the adjustment of the valve core position.