electro-hydraulic proportional valve construction machinery

electro-hydraulic proportional valve construction machinery application examples
A certain type of truck crane hydraulic system schematic diagram drawn only with electro-hydraulic proportional valve related parts. The machine uses a three TECNORD TDV-4/3 LM-LS/PC type parher double connector proportional multi-way valve, load sensing circuit in the three shuttle valve will be three workloads maximum pressure regulator elected to a remote overflow valve remote control port, adjust the pressure relief valve overflow, the output pressure of the hydraulic pump needs to happen to meet system load, up to a certain energy projects. Pressure compensated flow valve oil so parher bsp thread fittings that each one is only related to the valve opening, which is subject to independent of the load, which bear the load of the valve plate does not matter, to any load can freely control the load speed projects.
A bulldozer dozer manual and electro-hydraulic proportional pilot control instance. When the two-way solenoid valve is not energized, the pilot pressure and manual vacuum type pilot valve connected, shuttle valve choose from a manual pilot valve pressure hydraulic valve control; parher hydraulic couplers when two way solenoid valve is energized, the pilot control Proportional pressure leading to three pressure oil type pilot valve, shuttle valve on the hydraulic valve control.