Air compressor pressure valve with 1/4 " outlet safety valve with 2 gauges. With on / off switch. The piston seal adopts V-type seal. Piston structure, the flow rate is 30% higher than that of traditional diaphragm type. The structure of the valve body has an overflow port, for rapid pressure reduction. Air compressor pressure valve switch provides high precision and quick response. The air compressor pressure valve switch is small in size, lightweight. Air compressor control valve regulator with gauges for rapid pressure reduction The main function of this valve is to regulate the closing and starting pressure of the air compressor. Helps you save the electrical energy of the air compressor. High precision voltage regulation and sensitive feedback. With on / off lever. Users can adjust according to their actual situation. 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 rate: 3000L / min 1 pressure switch for air compressor.