Collection: Pressure switch

Find our selection of pressure switches for cold rooms

The pressure switch detects the excess of a predetermined value of the pressure of a fluid. Widely used in cold room systems to avoid abnormal drops in pressure or an excessive increase in pressure in the refrigeration circuit, the pressure switch is an important part of your device.

Information can be transmitted electrically, pneumatically, hydraulically, and electronically.

Our store offers several brands of components including the Danfoss Pressure Switch catalog, as well as Johnson Controls pressure switches. At the bottom of this page you will find advice explaining the role and key points of the pressure switch.

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What is the role of a pressure switch in a refrigeration system?

In the case of a cold room, the compressor is in action to start the production of the refrigeration process. This phenomenon is produced by the pressurization of the refrigerant fluid. The role of the pressure switch is to control the pressure level of the latter and if necessary acts as a circuit breaker. You can find LP (low pressure) or HP (high pressure) pressure switches. It is therefore an important part of refrigeration devices and cold rooms, which makes it possible to secure equipment and avoid damage due to poor pressure adjustment. It is also called pressure switch or pressure switch. If it detects that the gas threshold is insufficient or exceeded, it will cut off the electrical circuit. The high pressure switch will protect the equipment of your cold room refrigeration system if the pressure is too high (for example in the case of condenser clogging or ventilation failure). The cut-off threshold varies depending on the type of condenser, the refrigerant used, etc. In general the setting is between 8 and 32 bars.

Concerning the low pressure switch which is fixed at the compressor level, at the suction level. It aims in particular to secure the system in the event of humidity in the air or a drop in pressure, by stopping the compressor, generally at a pressure between 5° and 10°C.