Pressure Switch is a simple pressure control device. When the measured pressure reaches the rated value, the pressure switch can send out an alarm or control signal.
Pressure switch types
Pressure switches can be divided into coil spring tube pressure switches, diaphragm pressure switches, bellows pressure switches and bellows pressure switches according to the sensing elements.
Pressure switches can be divided into mechanical and electronic smart pressure switches according to their nature.
According to the setting value, the pressure switch can be divided into: adjustable pressure switch and non-adjustable pressure switch.
Pressure switches can be divided into general pressure switches, small pressure switches, smart pressure switches, explosion-proof pressure switches, marine pressure switches, differential pressure switches, etc. according to applications.
You can learn more about pressure switches by wikipedia.
How does a pressure switch work?
The working principle of the pressure switch:
When the pressure in the system is higher or lower than the rated safety pressure, the disc in the sensor moves instantaneously. Push the switch connector on or off through the connecting guide rod.
When the pressure drops to or rises to the rated recovery value, the disc is instantly reset and the switch automatically resets. Or simply when the measured pressure exceeds the rated value, the free end of the elastic element is displaced. Push the switch after connecting or comparing Element. Change the on-off state of the switch element to achieve the purpose of controlling the measured pressure.
The elastic elements used in the pressure switch include a single-turn spring tube, diaphragm, bellows and bellows. Switching elements include magnetic switches, mercury switches, micro switches, etc.
What is a pressure switch used for?
Pressure switches used in industrial machinery and systems must be robust, reliable, accurate, and have a long service life.
Pressure switches are usually used in paper machines, air compressors or pump sets.
In this type of equipment, we rely on pressure switches to act as safety devices, alarms or control elements in the system.
Pressure switch air compressor
An ordinary air compressor consists of three main parts: electric motor, V-shaped air pump and air storage tank.
There is also a pressure switch in the air compressor, which can adjust the start and stop of the motor. By adjusting the pressure in the oil tank, the air compressor can rest.
The air compressor factory can set a certain starting and stopping pressure according to the requirements of different customers during the commissioning process.
For example, when the compressor starts, air is pumped into the interior. When the pressure reaches the set value, the pressure switch will contact the contact to stop the motor. When the pressure is lower than the set value, the air compressor will start again to keep the pressure in the oil tank within the pressure range.
How do you test a pressure switch?
Calibration method of pressure switch:
- Find out the action setting value of the tested instrument according to the specification.
- Select an appropriate pressure signal source to pressurize the test meter. A standard pressure gauge with an appropriate range detects the signal pressure. Use a multimeter to measure the on and off states of the contacts.
- For the high report switch, slowly increase the pressure from low to high, and observe the multimeter. When the multimeter indicates a sudden change, the evaluation of the standard pressure gauge is the high reported value.
Then slowly lower the pressure. When the multimeter indicates a sudden change again, the evaluation of the standard pressure gauge is the reset value.
- For the under-report switch, the test pressure should be increased above the set value first, and then slowly decreased.
When the multimeter indicates a sudden change, the evaluation of the standard pressure gauge is a low value.
Press again slowly, and when the multimeter indicates a sudden change again, the indication value of the standard pressure gauge is the reset value.
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Sino-Inst offers over 50 Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.
It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.
A wide variety of Pressure Switches options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of Pressure Switch instrumentation, located in China.
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Pressure Switches for Sale|Mechanical-Electronic|Gas-Liquid
Pressure Switch is a simple pressure control device. When the measured pressure reaches the rated value, the pressure switch can send out an alarm or control
Product SKU: Pressure Switches
Product Brand: Sino-Inst
Product Currency: USD
Product Price: 30
Price Valid Until: 2059-09-30
Product In-Stock: InStock