Excavator construction machinery accessories 439559 9101532 solenoid valve

      Hydraulic proportional valve is the proportional electromagnet input voltage signal in the valve to produce corresponding action, so that the working valve spool displacement, valve port size change and complete the pressure and flow output components proportional to the input voltage. Spool displacement can also be fed back mechanically, hydraulically or electrically. Electro-hydraulic proportional valve has a variety of forms, easy to use electrical and computer control of various electro-hydraulic systems, high control accuracy, flexible installation and use, and strong anti-pollution ability, and other advantages, the application field is expanding. In recent years, the development and production of plug-in proportional valves and proportional multiway valves fully consider the characteristics of construction machinery, with pilot control, load sensing and pressure compensation functions. It is of great significance to improve the overall technical level of mobile hydraulic machinery. In particular, electronic control pilot operation, wireless remote control and wired remote control operation have shown good application prospects.

     The screw cartridge proportional valve is a threaded electromagnetic proportional cartridge component fixed on the oil circuit assembly block. The screw cartridge valve has the characteristics of flexible application, pipe saving and low cost, and has been used more and more widely in construction machinery in recent years. Commonly used spiral cartridge proportional valve has two, three, four and multi-pass forms, two-way proportional valve main proportional throttle valve, it often it components together to form a composite valve, on
Flow and pressure control; The three-way proportional valve is the main proportional pressure reducing valve, which is also the most used proportional valve in the mobile mechanical hydraulic system. It mainly operates the hydraulic multiway valve pilot oil circuit. The three-way proportional pressure reducing valve can replace the traditional manual pressure reducing pilot valve, which has more flexibility and higher control accuracy than the manual pilot valve. It can be made into a proportional servo control manual multi-way valve as shown in Figure 1. With different input signals, the pressure reducing valve makes the output piston have different pressure or flow rate to achieve proportional control of the displacement of the multi-way valve spool. Four-way or multi-way screw cartridge proportional valves can be individually controlled for the working device