Construction: Air compressor pressure valve with 1/4 outlet safety relief valve with 2 pressure gauges. With on/off switch. The piston seal is V-shaped, well sealed, wear-resistant and stable. Advantage: Piston structure, the flow rate is 30% higher than traditional diaphragm type. Operation: The valve body structure has an overflow port for quick pressure reduction. Performance: The air compressor pressure valve switch features high precision and fast response. Feature: The air compressor pressure valve switch is small in size, light in weight and easy to install. Product Description Air Compressor Control Valve Regulator with Gauges for Quick 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 electric energy of the air compressor. High-precision voltage regulation and sensitive feedback. With on/off lever. Users can adapt to their actual situation. Easy to install and use. Specifications: Material: Metal + Plastic. Maximum Voltage: 240V. Maximum Current: 20A. Pressure Switch Control Range: 90-120PSI. Connection: G1/4 Gauge Diameter: G1/8. Applicable Pressure Range: 0.5-0.8MPA. Maximum flow rate: 3000 l/min Contents: 1 pressure switch for air compressor.