LF12 Three-Phase Air Pressure Switch

PRODUCT FEATURES

Suitable for air compressors and water pumps driven by three-phase electricity;automatically regulates pressure and enables cyclic operation between preset upper and lower limits.
Built-in relief valve to prevent overload starting of the motor.
Equipped with a manual switch knob for manual shutdown of equipment operation.
Four-way connector design simplifies the installation of accessories such as pressure gauges and safety valves.
Integrated overload protection thermal relay,which automatically cuts off power to prevent motor burnout when the motor is overloaded.
Multiple specifications of threaded interfaces and optional pressure regulation ranges available to adapt to different application scenarios.

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Description

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Description

The LF12 series three-phase pressure switch is designed for air compressors or water pumps driven by three-phase electricity. It regulates the air pressure in the air compressor tank or the water pressure in the water pump system, enabling the equipment to operate in an automatic cycle between two preset upper and lower pressure limits.

Equipped with an unloading valve, the switch prevents the air compressor motor from overload starting. The manual switch knob can be used to manually shut down the operation of the air compressor or water pump. The four-way connection base simplifies the installation of air compressor accessories such as pressure gauges and safety valves.

In addition, the switch is integrated with an overload protection thermal relay. When the motor runs under overload conditions, the thermal relay will trip immediately to cut off the motor power supply and avoid motor burnout.

Specification

Product Selection

encoding	Interface form internal thread Interface form internal thread	unloading valve type	unloading valve inner diameter	Handle form	thermal relay	thermal relay specification
1	A without BG1/2+3G1/4+4G1/4	C No relief valve	DNo unloading valve	E not have	F not have	G 2.5-4A
2	Four-way G3/8 + 3G1/4 + 4G1/4	Vertical (brass) metal quick connector	φ6.0	knob	have	4-6.3A
3	NPT1/2+3NPT1/4+4G1/	4 Level (Zinc Alloy)	φ6.4			6.3-10A
4	R1/2+3R1/4+4G1/4	Vertical (zinc alloy)	φ6.5			10-16A
5						16-20A

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