Proportional direction valve structure

Servo valve of the main valve and directional control valve is the valve structure, usually of the reversing valve core not only by electromagnet push, but by output liquid pressure to push the prestage valve, this point and electro-hydraulic directional control valve is similar, only the electro-hydraulic directional control valve prestage valve is electromagnetic directional valve, and the dynamic characteristics of servo valve prestage valve is better nozzle flapper valve or jet pipe valves.

 

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The above:The piston pump factory carries on the detailed analysis to its safe operation instruction