The difference between the initial pressure which opens a valve and the pressure required to keep it open is called?

The term that describes the difference between the initial pressure that opens a valve and the pressure required to keep it open is known as operating pressure. This concept is crucial in understanding valve operation within hydraulic and pneumatic systems.

Operating pressure refers specifically to the functional pressures involved in maintaining a valve’s open position after it has been initially actuated. It encompasses the necessary pressure to overcome any resistance in the system and ensures the valve remains in its desired state, whether open or closed. Correctly determining the operating pressure is vital for ensuring efficient operation and preventing system failures.

In contrast, pressure rating typically refers to the maximum pressure that a valve can withstand under normal operating conditions, while pressure override is not commonly recognized in valve terminology and does not specifically relate to the mechanics of valve operation. Pressure compensation, though it describes adjustments made to maintain stability in pressure systems, does not align with the definition of the difference between opening and maintaining a valve's state.