" About this product: Structure: Air compressor pressure valve with 1/4" outlet safety valve with 2 gauges. With on/off switch. The piston seal adopts V-type 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 valve body structure has an overflow port, for rapid pressure reduction. Performance: the switch of air compressor pressure valve provides high accuracy and quick response. Feature: The air compressor pressure valve switch is small in size, light in weight and easy to install. Product Description Regulator Air Compressor Control Valve Assembly with Gauges for Quick Pressure Reduction The main function of this valve is to regulate the shut-off and start-up pressure of the air compressor. Features: Helps you save electric power from 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. Features: 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: 0.5-0.8MPA. Maximum flow: 3000L/min Contents: 1 air compressor pressure switch. "