Definition of low pressure side

1. that part of a piping system exposed to the pressure of a gas that has been reduced below cylinder pressure when passed through a pressure regulator. The low pressure side includes the outlet chamber and diaphragm of the pressure regulator as well as the delivery pressure gauge. The term "low pressure" in this instance does not imply a particular value of pressure. [SEMI Chemicals/Gases, Vol. 1, 1990 (no longer in print)]