Structure: Air compressor pressure valve with 1 or 4 " outlet safety valve with 2 gauges. With on or off switch. The piston seal adopts V-type seal, good sealing, wear-resistant and stable. Advantage: piston structure, the flow rate is 30 percent higher than that of traditional diaphragm type. Operation: The structure of the valve body has an overflow port, for rapid pressure reduction. Performance: Air compressor pressure valve switch provides high precision and quick response. Feature: The air compressor pressure valve switch is small in size, lightweight and easy to install. Product 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. Features: Helps you save the electrical energy of the air compressor. High precision voltage regulation and sensitive feedback. With on or off lever. Users can adjust according to their actual situation. Easy to install and use. Features: Materials: metal and plastic. Maximum voltage: 240 V. Maximum current: 20 A. Pressure switch control range: 90 to 120 psi. Connector: G1 or 4 Gauge diameter: G1 or 8. Applicable pressure range: 0.5-0.8 MPA. Maximum flow rate: 3000L or min Content: 1 pressure switch for air compressor. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.