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Glossary

 

The terms and definitions included in this glossary were taken from "ASHRAE Terminology of Heating, Ventilation, Air Conditioning & Refrigeration".
To access the complete glossary please visit ASHRAE's Bookstore.


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Term Definition
pressure loss


change in total pressure due to friction and turbulence. Compare pressure drop
 
pressure regulator

device to maintain controlled downstream fluid pressure with varying upstream pressure.

 

 
pressure relief


designed automatic reduction of excessive pressure in a vessel 

 
pressure relief device

1. valve or rupture member designed to relieve excessive pressure automatically.

2. means for relieving internal pressure and preventing explosive shattering of the housing.

 
pressure relief vessel

container or tank which allows the relief into it of excessive pressure automatically.

 
pressure-imposing element


device for increasing the pressure on a fluid, e.g., refrigerant or other gases.

 
pressure-limiting device


pressure-responsive mechanism designed to stop automatically the operation of a pressure imposing element at a predetermined pressure.

 





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