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 quick pressure reduction. Performance: The air compressor pressure valve switch has high accuracy and quick response. Feature: The air compressor pressure valve switch 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 and starting pressure of the air compressor. Features: Helps you save the electric energy 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