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Pressure Regulators

Fitters Notes Series: Pressure Regulators

10 September 2008
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.

Useful practical tips for the everyday work of fitters is provided in the “Fitters Notes” series. The “Fitters Notes” series is based on the handbook of the same name produced by Danfoss, which discusses the basic principles of commercial refrigeration systems and the associated basic components.
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