YUANKY HW31 three-phase 400V vertical air pressure switch is a professional pressure control component specially designed for three-phase electric air compressors, providing stable and reliable pressure regulation for industrial pneumatic systems. As a core control device of air compressors, it can accurately keep the tank pressure within a preset range, ensuring the efficient and safe operation of the whole pneumatic system. This vertical-structured switch is compatible with three-phase 400V power supply, and can be matched with medium and large electric air compressors to meet the pressure control needs of heavy-duty industrial scenarios.

The HW31 series is equipped with a built-in unloader valve, which can effectively prevent the air compressor from starting under load, reduce mechanical loss and extend the service life of the equipment. It is also designed with a manual On-Off knob, allowing operators to manually cut off the compressor for daily maintenance, emergency shutdown and safety control, greatly improving the flexibility and safety of operation. In addition, YUANKY also provides HW18, HW19, HW20 and other series of pressure switches, which are suitable for small and medium-sized electric air compressors with different configurations to meet diverse application requirements.

The working principle of the HW31 air pressure switch is based on mechanical pressure sensing and electrical contact control. It is preset with upper and lower pressure thresholds. When the tank pressure drops below the lower limit, the internal pressure-sensing element acts to close the circuit and start the compressor to inflate. When the pressure rises to the upper limit, the sensing element triggers the circuit to disconnect, stopping the compressor. At the same time, the unloader valve releases the residual pressure in the compressor head to ensure no-load startup for the next operation, realizing automatic cycle pressure regulation.

This three-phase pressure switch is widely used in various electric air compressors, industrial manufacturing workshops, automobile maintenance shops, construction machinery and other pneumatic power equipment. With stable performance, compact structure, easy installation and strong durability, YUANKY HW31 series air pressure switches have become ideal matching components for air compressor manufacturers and industrial users around the world.