April 2016

Rotating Equipment

Design a pressure safety valve at the centrifugal pump discharge

In most process plants, it is unusual to install a pressure safety valve (PSV) to centrifugal pump and compressor discharge, but some PSVs are needed and are installed to protect the system against miscellaneous scenarios that could create overpressure in the system.

Kadam, N., Daelim Industrial Co. Ltd.

In most process plants, it is unusual to install a pressure safety valve (PSV) to centrifugal pump and compressor discharge, but some PSVs are needed and are installed to protect the system against miscellaneous scenarios that could create overpressure in the system.1 An external PSV is often installed at reciprocating pumps and the reciprocating compressor discharge to protect the machine and downstream system against block discharge. For the reciprocating pumps, an internal PSV is often provided to protect the casing. Installing a PSV at the centrifugal pump and compressor discharge is not a general practice, since the pump and compressor circuits are usually designed for the pump shutoff

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