Excavator hydraulic pump solenoid valve proportional solenoid valve TM82002

   The technological progress of electro-hydraulic proportional valves and other special components of engineering machinery makes the electrical control of various systems such as gear, steering, braking and working devices of engineering vehicles become a reality. For the mechanism that generally requires displacement output, the proportional servo control manual multiway valve driver similar to Figure 1 can be used to complete. Electrical operation has the advantages of fast response, flexible wiring, integrated control and easy interface with the computer, so modern construction machinery hydraulic valves have been more and more the use of electrically controlled pilot controlled electro-hydraulic proportional valves (or electro-hydraulic switch valves) instead of manual direct operation or hydraulic pilot controlled multi-way valves. Another significant advantage of using electro-hydraulic proportional valves (or electro-hydraulic on-off valves) is that the number of operating handles can be greatly reduced on engineering vehicles, which not only makes the cab layout simple, but also effectively reduces the complexity of operation, which has important practical significance for improving the quality and efficiency of work. Figure 2 is the TECNORD JMF control lever (joystick), using a joystick can effectively control the multi-piece electro-hydraulic proportional valve and on-off valve in Figure 2. The rocker can realize proportional control or switch control in both X and Y axis directions, and the application is very convenient.