Pressure switch for air compressors with a 0.5-0.8 MPA switching range, featuring a European-style assembly, normally closed contact method, and a 12MM connector, suitable for 220V or 380V systems with a working pressure of 5-8 KG.
Pressure switch for air compressors with a 0.5-0.8 MPA switching range, featuring a European-style assembly, normally closed contact method, and a 12MM connector, suitable for 220V or 380V systems with a working pressure of 5-8 KG.
Air Compressor Pressure Switch: A 0.5-0.8 MPA Regulating Valve for 220V or 380V Systems
This pressure regulating valve, or pressure switch, is a key component for managing the operation of an air compressor. Its primary function is to monitor system pressure and automatically switch the compressor motor on or off to maintain pressure within a preset band. This specific model offers a switching range of 0.5 to 0.8 Megapascals (equivalent to 5-8 BAR or 90-120 PSI), providing a adjustable cut-in and cut-out point. It is offered in two distinct electrical configurations: one rated for 220V systems and another for 380V systems, allowing you to select the correct variant for your workshop or industrial setup. The switch is presented in a European-style assembly, comes with a normally closed contact method, and is designed for integration into a system using standard fittings.
Features and Construction
This pressure switch is built around its core function of reliable pressure sensing and electrical switching. The construction centres on the pressure sensing mechanism and the electrical contacts rated for the high current draw of a compressor motor.
Material and Build
The switch housing contains the pressure-sensing diaphragm and the electrical switching mechanism. It features a normally closed (NC) contact configuration, meaning the circuit is complete when the system is at rest and opens when the target pressure is reached to stop the motor. The unit is marked with its maximum ratings: a maximum voltage of 240V, a maximum current of 20 Amps, a maximum pressure of 12 BAR, and a maximum PSI of 175. These ratings define the operational limits of the component. The stated lifespan of the switching mechanism is 80,000 cycles, indicating its design for repeated use.
Size and Practical Fit
The pressure switch itself is a compact unit designed for mounting on or near the compressor tank. For connection to your air system, it is equipped with a 12MM connector, which is also specified as a 1/4 inch thread, a common size for compressor accessories. It also includes a 6MM exhaust port, likely for an unloader valve or bleed function, and a separate pressure relief port with a 9.5MM outer diameter. The product is supplied in a small cardboard box measuring 185mm in length, 100mm in width, and 110mm in height. The net weight of the switch assembly is 635 grams, with the total packaged weight coming to 720 grams.
Uses and Placement
This component is integral to the automatic and safe operation of piston-type air compressors commonly found in garages, workshops, and light industrial settings.
Event or Professional Use
In professional environments like automotive repair shops, carpentry workshops, or manufacturing cells, consistent air pressure is crucial for powering tools like impact wrenches, nail guns, and spray painters. This pressure switch maintains the air receiver tank within the set 5-8 KG/cm² (0.5-0.8 MPA) range, ensuring tools receive adequate pressure without causing the compressor to run continuously. The 20A maximum current rating and choice of 220V or 380V variants allow it to be matched to the electrical supply of industrial-grade compressors.
Everyday Home Use
For the home DIY enthusiast with a workshop compressor, this switch performs the same vital function. It automates the compressor, filling the tank to the upper set pressure and then shutting off, only restarting when pressure falls to the lower threshold. This protects the compressor motor from overheating due to constant running and manages energy use. The clear pressure range settings allow users to tailor the system for tasks like inflating tyres, operating a brad nailer, or cleaning with a blower gun.
Benefits and Buying Value
The value of this pressure switch lies in its role as a replacement or upgrade part that restores or enhances the automatic functionality of an air compressor system.
Reuse and Low Maintenance
As a replacement part, this switch can extend the usable life of an existing compressor whose original pressure switch has failed. Its straightforward specification—choosing between 220V and 380V—simplifies the selection process. Once installed and correctly set, the switch requires minimal ongoing maintenance beyond occasional checks for air leaks at its connections. The 80,000-cycle lifespan suggests a robust design suited for long-term use in intermittent duty cycles typical of many compressor applications.
Why Choose This Product
This pressure switch offers a clearly defined specification set. The dual voltage option (220V/380V) covers a wide range of common compressor models. The inclusion of specific connector sizes (12MM/1/4", 6MM exhaust) and the stated pressure relief port dimension (9.5MM OD) provides the necessary details to assess compatibility with your existing pipework. The defined switching range of 0.5-0.8 MPA is a standard band for many workshop compressors, making it a practical choice for a common repair or build scenario where precise pressure control is needed.
