Pneumatic Directional Control Valve (common model: M34BQK-E20L) serves as the core control component in Dump Truck hydraulic systems. Key specifications are as follows:

Core Function

Controls the lifting and lowering actions of the dump truck's hydraulic hopper, featuring a “slow descent” function (achieved through proportional regulation for controllable descent speed) to prevent excessive material spillage during unloading.

Application Scenarios

Primarily used in heavy-duty dump trucks/tippers such as Tianjin, Dali Shen, and Balong 507 models, serving as the directional control component for the hydraulic lifting circuit.

Key Parameters

Operating pressure typically around 20MPa. Valve spool directional control is achieved via pneumatic signals (air pressure drive), coordinating with hydraulic distribution valves to execute motion control.