Proportional Control Valve 4 Hole Hand Operated Hydraulic Valve for Dump Truck Tipper with Slow Down Function Features： 1、Easy Control: The switch makes it easy for drivers to control power transmit, especially in environments where frequent start stop operations are needed. 2、Quick Response: The control valve runs smoothly and responds quickly to the driver's commands, ensuring the power system adjusts state rapidly and improves work efficiency. 3、High Efficiency: The proportional control valve switch significantly enhances the operational efficiency of dump trucks, reducing equipment wear and energy consumption. 4、Convenient Use: Control valve Installed in the cab, working with the cylinder to control the dump body's lowering movement through the handle's proportional motion. 5、Precise and Reliable: The switch has 4 working positions to facilitate automatic lifting, lowering, stopping, and slow lowering, providing precise and convenient operations for users. Specification： Item Type:?Proportional?Control?Valves Material: Aluminum + Plastic Maximum Pressure: 0.12MPA Minimal Pressure: 0.06MPA Minimal Temperature: -40°C? Maximum?Temperature: 80°C? Features: 1. Installed in the cab for remote control. 2. Valve has 4 working positions: automatic lift, automatic descent, automatic stop, automatic slow descent. 3. The valve is aesthetically pleasing, self locking in the center position, clear switching, easy operations. 4. Working together with the slow descent pneumatic directional valve, achieve fast and slow control of the descent action. 5. Air outlet at the bottom, comes with 4 quick connect air fittings. Application: Widely used in hydraulic systems of dump trucks, semi trailers, and mining trucks Package List： 1 x?Switch