Proportional Control Valves With PTO Switch Dump Truck Tipper Hydraulic System Slow Down Air Operated Truck Support Dropshipping and Wholesaling. If you need, please contact me. Product Description:1. It is installed in the cab and remotely controlled.2. The valve has four working positions: lifting, intermediate stop, descending and slow lowering.3. The valve has beautiful appearance, self-locking of middle stop position, clear transposition and simple operation.4. It can realize the fast and slow control of descending action by cooperating with the slow descending pneumatic directional valve.Product advantages:The quality is stable and the consistency between products is good.The product is widely used in the hydraulic system of dump truck with good versatility.The product is easy to install and maintain.Colour: BlackMaterial: Metal+ABSPackage Contents:1 x Proportional Control ValvesOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.