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 air compressor pressure valve switch provides high precision and fast response.< /li> 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 Rapid Pressure Reduction The main function of this valve is to regulate the closing and starting pressure of the air compressor. Features:< br> Helps you save electric energy of air compressor. High precision voltage regulation and sensitive reaction. With on/off lever. Users can adjust according to their situation Easy to install and use.