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Practical Questions

Calculate PSV Lift Pressure

A safety device commonly installed on process vessels containing pressurized gases is a Pressure Safety Valve or PSV.

PSV Lift Pressure

In this example, a PSV protects a storage tank against rupture from excessive internal gas pressure, with the PSV set to open (“lift”) and vent the tank if the internal pressure exceeds 2 inches water column:

PSV lift pressure

Calculate the total upward force exerted on the circular roof of this cylindrical storage tank at the PSV lift pressure, expressed in the unit of tons. F = ______ tons.

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Credits: Tony R. Kuphaldt

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Calculate PSV Lift Pressure

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