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Pressure regulators

Tuesday, 1 March 2011

Pressure regulators are necessary to regulate the pressure of certain components of the system. For example, an evaporating pressure regulator defines a certain minimum pressure in an evaporator, while a condensing pressure regulator does the same thing for a condenser. A crankcase pressure regulator prevents the system from exceeding a defined setpoint pressure, and a capacity regulator, which is also called a hot-gas bypass regulator, mixes in hot gas if the pressure on the low-pressure side drops below the setpoint pressure level. The purpose of a receiver pressure regulator is to initially bypass the condenser during system start-up in cold weather, after which it closes the bypass when a stable operating state is achieved.