Pressure override is equal to:

Pressure override refers to the difference between the full flow pressure and the cracking pressure of a relief valve or similar device. Cracking pressure is the minimum pressure at which the valve begins to open. The full flow pressure is the maximum pressure that the system achieves when the valve is fully open.

When calculating pressure override, it is essential to understand that it indicates how much higher the full flow pressure is compared to the cracking pressure. By subtracting the cracking pressure from the full flow pressure, you determine the additional pressure available in the system beyond the point where the valve allows fluid to start passing through. This measurement is crucial for understanding system performance and ensuring safe operation.

Knowing this helps in various applications, such as maintaining system efficiency and avoiding potential failures or safety hazards associated with excessive pressure.