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Adjustable pressure switch for water pump

Description

How do pressure switches work?

An electro-mechanical pressure switch works by applying pressure to either a diaphragm, bellow or a piston to exert motion. The motion can create electrical contact in a microswitch launching an alarm or creating an action, for example switching off a compressor. An electronic pressure switch generally uses a piezo-electric crystal; when deformed a piezo crystal emits an electric current.

How do I select a pressure switch?

Choosing the right switch will depend on the pressure requirements of the air compressing unit you’re using, as well as the following considerations:

• Operating pressure range
• Switching pressure difference
• Repeatability
• Medium – for example air, hydraulic or ‘allfluid’
• Environment for operation – for example ATEX requirement, temperature etc
• Switching current – for example, gold contacts allow lower currents
• Outputs required

Feature

• Q series single pressure controls can be not only used in fluorinated refrigerant, but also in the air and liquid(allowed liquid temp. -20 to 120°C)
• Adjustable range and differential settings
• Renovated SPDT micro-switch ensures the reliable switch function
• Flexible mounting bracket suits various kids of application
• Upper lid is optional (IP44)
• Various connections are available on request
• Automatic and manual reset version
• The material of bellows is copper and pressure interface is brass
• Several models available in drip-proof enclosure for marine applications or in explosion-proof enclosure for special applications
• CE approval

Technical Data

Note:

Calibration unit on scale plate with “bar” & “psig”, could be revised into “Mpa”& “kgf/cm2” if required by customers. Connections could have selections as British Flare (E), solder (C) and capillary (S).

Dimensions (mm)

Electric Rating

Electric wiring

Nanjing Qiyuan Controls & Equipment Co., Ltd. was found in 1998.

In 2005, the number of the employees increased to more than 100.

In 2006, its manufacturing base was moved to Huai An Industrial Development Zone.

Keram Controls has obtained the investment from Keram Group in 2009.

In 2014, business expands to electrical components and appliance, and changed its name to Keram (Nanjing) Electrical Equipment Co., Ltd.