Which pressure does the UV type PSV operate above its set point?

The UV type Pressure Safety Valve (PSV) is designed to operate at a specified pressure set point, and it typically opens to relieve pressure when the system pressure exceeds this set point. The specific characteristic of the UV type PSV is that it generally operates above its set point by a certain percentage to ensure a safe and effective release of pressure.

Choosing 10% indicates a balance between providing enough pressure relief while also minimizing the risk of premature opening. This is a common standard for many types of PSVs to ensure that they do not open unnecessarily due to minor fluctuations in pressure, which could lead to varying performance and safety issues.

Therefore, a 10% operation above the set point is intended to provide a controlled and reliable mechanism to protect against overpressure scenarios without compromising the system's efficiency. Understanding the appropriate percentage is crucial for ensuring that the PSV performs as required to safeguard equipment and maintain safe operational conditions.