About this product: Structure: Air compressor pressure valve 1/4 outlet safety valve with 2 pressure gauges. With on/off switch. The piston seal adopts V-seal, good sealing, wear-resistant and stable. Advantage: Piston structure, the flow rate is 30% higher than the traditional diaphragm type. How it works: The structure of the valve body adopts an overflow port for rapid pressure reduction. Performance: The air compressor pressure valve switch has high precision and quick response. Feature: The air compressor pressure valve switch is small, light and easy to install. Product Description Air compressor control valve regulator with pressure 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 electrical energy of the air compressor. High precision voltage control and sensitive feedback. With on/off lever. Users can adjust according to their actual situation. Easy to install