Excavator solenoid valve 25-220994 hydraulic pump proportional solenoid valve

    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 valve bit according to the output signal of the same size as the flow here
To achieve precise control requirements.

Type of proportional valve

   The classification according to the proportional valve control mode refers to the classification according to the electrical and mechanical conversion mode in the pilot control valve of the proportional valve, and the electrical control part has a variety of forms such as proportional electromagnet, torque motor, DC servo motor, etc.
(1) Electromagnetic type

(2) Electric type

(3) electrohydraulic