Tag Archives: pressure safety valve

PSV Types Selection

Mention three types of Pressure Safety Relief Valve (PSV) and explain how to select the right type for specific application? Three types of Pressure Safety Relief Valve (PSV) are conventional, balanced bellows and pilot operated. Conventional safety relief valves can … Read More

Instrument Engineer | |

COEFFICIENT OF DISCHARGE (Kd)

The ratio of the mass flow rate in an actual pressure safety valve to that of an ideal nozzle. It is used in calculation for determining the flow through a pressure relief device or size of the selected orifice. Coeffient … Read More

Glossary C | |

Chattering (Chatter)

Unstable operation of pressure relief valve due to excessive built-up back pressure which might occur in oversized pressure safety valve. In this condition the pressure relief valve disc moves reciprocally and contacts with the seat during cycling in which condition … Read More

Glossary C | |

Back Pressure

Back pressure term is usually defined as the pressure that exists at downstream of instrument (e.g. at discharge line of pressure safety valve). With regard to pressure safety valve application, back pressure may consist of built-up back pressure and superimposed … Read More

Glossary B | |