General description The Three-hole four-hole pressure regulating valve assembly is designed for air compressor pressure control. It features a robust metal and plastic construction, ensuring durability and reliability. This assembly includes a safety valve with two gauges, an on/off switch, and a piston structure that enhances flow rate efficiency. Technical specifications Material: Metal + Plastic Maximum Voltage: 240V Maximum Current: 20A Pressure Switch Control Range: 90-120 PSI Connector: G1/4 Gauge Diameter: G1/8 Applicable Pressure Range: 0.5-0.8 MPA Maximum Flow: 3000 L/min Installation Easy to install with a compact design Includes an on/off lever for user convenience Usage Regulates the closing and starting pressure of the air compressor Helps save electric energy Allows users to adjust settings according to their needs Other information The piston seal uses a V-type sealing ring for improved sealing and wear resistance Features an overflow port for rapid pressure reduction