Suitable for excavator PC200-6 hydraulic relief valve 702-75-01200

    Electro-hydraulic proportional valve is the proportional solenoid in the valve according to the input voltage signal to produce a corresponding action, so that the working valve spool displacement, valve port size change and complete the pressure and flow output proportional to the input voltage components, valve spool displacement can also be in the form of mechanical, hydraulic or electrical feedback. Because the electro-hydraulic proportional valve has various forms, easy to form a variety of electrical and computer-controlled electro-hydraulic systems, high control accuracy, flexible installation and use, and strong anti-pollution ability, the application field is widening. In recent years, the plug-in proportional valve and proportional multiway valve developed and produced fully consider the use characteristics of construction machinery. It has the functions of pilot control, load sensing and pressure compensation, and its appearance is of great significance to the improvement of the overall technical level of mobile hydraulic machinery, especially in the electronic pilot operation, wireless remote control and wired remote control operation.

     When the existing proportional electro-hydraulic valve manual pressure relief device is in use, the manual pressure relief device generally moves with the spool all the time, and there is friction resistance of the seal, which affects the precision of the spool action. At the same time, the existing proportional electro-hydraulic valve manual pressure relief device is difficult to operate.