Hydraulic pump proportional solenoid valve 25223075 excavator

The electro-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
The port size is changed to complete the pressure, flow output element 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.
2 Types and forms of electro-hydraulic proportional valves for construction machinery Electro-hydraulic proportional valves include proportional flow valves, proportional pressure valves and proportional directional valves. Construction machinery hydraulic operation characteristics, divided into two types of electro-hydraulic proportional valve in the form of structure: one is the spiral cartridge type proportional valve, the other is the slide valve type proportional valve Spiral cartridge type proportional valve is threaded electromagnetic proportional cartridge parts fixed on the oil circuit integrated block components, spiral cartridge valve has the characteristics of flexible application, pipe saving and low cost, etc
More and more widely used. Commonly used spiral cartridge type proportional valve has two, three, four and multi-pass forms, two-way proportional valve main proportional throttle valve, it often its components together to form a composite valve, the flow, pressure control;