About this product: Structure: Air compressor pressure valve with 1/4 outlet safety valve with 2 gauges. With on/off switch. The gasket of piston adopts V-type oil seal, good sealing, wear-resistant and stable Advantage: piston structure, the flow rate is 30% higher than that of the traditional diaphragm type Operation: the body structure of the valve has an overflow port, for rapid pressure reduction Performance: the air compressor pressure valve switch provides high precision and fast response Feature: the air compressor pressure valve switch is air is small in size, light in weight and easy to install.Product Air Compressor Control Valve Regulator with Gauges for Quick Pressure Reduction The main function of this valve is to regulate the closing pressure and air compressor start-up Features: Helps you to save electric power of the air compressor. High precision voltage regulation and sensitive reaction. With on/off lever. Users can adjust according to their actual situation. Easy to install and use. Specifications: Materials: metal + plastic. Maximum voltage: 240 V. Maximum current: 20 A. Pressure switch control range: 90 to 120 psi. Connector: G1/4 Gauge diameter: G1/8. Applicable pressure range: 0.5-0.8 MPA. Maximum flow: 3000L/min Contents: 1 air compressor pressure switch.