Type (channel position): direct-acting type
Connection: flange
Nominal diameter: 6 mm
Driving mode: electromagnetic
Parts and accessories: valve body
Seal form:soft seal type
Flow direction: unidirectional
Application:Directional
Pressure environment: high pressure
Working temperature:High temperature
Characteristics:Pilot type

Proportional Valves with Integrated Amplifier

First, the proportional valve must have a matching amplifier that accepts control signals from a computer, or PLC, or potentiometer (slide rheostat) and amplifies the weak 0-20 mA signal to 0-800 mA. The computer's signal is too weak.
Then, the amplifier to amplify the signal sent to the solenoid valve degree, the solenoid valve based on the size of the incoming signal, to overcome the spring force, adjust the stroke of the actuator, the output flow rate of about 1 liters / min, the pressure varies with the signal of the control oil.
Then, the control oil reaches the two ends of the main spool, based on different pressures, push the spool to move the corresponding stroke, because the spool itself has a taper step, and the valve body combination, different strokes to get a different flow area, and then the inlet pressure stabilization, to get a different flow rate. Finally realize the proportional function.
Proportional valve is by the computer (or other), amplifier, proportional solenoid, taper step spool, inlet pressure compensation valve (single can not), shuttle valve, built-in unloading valve (excess flow back to the tank) and other components of a body right system. To truly realize the proportional function.