Suitable for bulldozer CAT 826G proportional solenoid valve Rotary solenoid valve 147-5399

 Proportional solenoid valve is a special control solenoid valve, its control principle is to control the opening of the valve through the external input command signal, so that the control flow and pressure always maintain the same proportion as the command signal. It uses a "position feedback" technology, which can accurately adjust the position of the valve according to the flow control signal, so as to achieve accurate control requirements, so it is widely used in accurate hydraulic system control.
 

  The main principle of the proportional solenoid valve is that the flow control signal and control force are used as the energy source of the electromagnetic coil, so that the electromagnet controls the opening of the valve, so the opening of the valve is roughly proportional to the size of the flow control signal. According to the different flow, each control position has a different flow value, which is fed back to the flow controller, the flow controller can adjust the position of the valve according to the output signal of the same size as the flow here, so as to achieve precise control requirements.

Application of excavator solenoid valve

The electromagnetic valve of the excavator is an automatic basic component used to control the excavator fluid, which belongs to the actuator, and is not limited to hydraulic and pneumatic. Used in industrial control systems to adjust the direction of media, flow, speed and other parameters. 2, the solenoid valve can be combined with different circuits to achieve the desired control, and the accuracy and flexibility of the control can be guaranteed. There are many kinds of solenoid valves, different solenoid valves play a role in different positions of the control system, the most commonly used are check valves, safety valves, direction control valves, speed regulating valves and so on.

DC electromagnet voltage is generally 24 volts. Its advantages are reliable work, not because the spore is stuck and burned out, long life, small size, but the starting power is smaller than the AC electromagnet, and in the absence of DC power supply, the need for rectification equipment. In order to improve the working reliability and life of the electromagnetic reversing valve, in recent years, wet electromagnet is increasingly widely used at home and abroad, this electromagnet and the slide valve push rod do not need to be sealed, eliminating the friction at the O-shaped sealing ring, its electromagnetic coil outside directly sealed with engineering plastic, not another metal shell, which ensures insulation, but also conducive to heat dissipation, so reliable work, Low impact, long life.
So far, the solenoid valve at home and abroad is divided into three categories in principle (namely: direct acting type, step child pilot type), and from the difference in valve disc structure and material and principle difference is divided into six sub-categories (direct acting diaphragm structure, step double plate structure, pilot film structure, direct acting piston structure, step direct acting piston structure, pilot piston structure).
Direct acting solenoid valve:
Principle: When energized, the electromagnetic force generated by the electromagnetic coil lifts the closing part from the seat, and the valve opens; When the power is off, the electromagnetic force disappears, the spring presses the closing part on the seat, and the valve is closed.
Features: It can work normally under vacuum, negative pressure and zero pressure, but the diameter is generally not more than 25mm.