Hydraulic valves control direction, pressure and flow — directional, pressure-relief, throttle, proportional and servo valves. Bosch Rexroth, Parker Hannifin, HAWE Hydraulik, Eaton Vickers and Moog (servo valves) lead.
Hydraulic Valve
Hydraulic Valve
Hydraulic valves control direction, pressure and flow — directional, relief, throttle, proportional and servo. Bosch ...
Hydraulic valves control direction, pressure and flow — directional, relief, throttle, proportional and servo. Bosch Rexroth, Parker, HAWE and Eaton Vickers lead.
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FAQ
Q Directional valve port/position?
A
Position × ports. 4/3: 3 positions, 4 ports (center config P/T/A/B); 4/2: 2 positions, 4 ports. Machine tools and construction commonly use 4/3.
Q Proportional vs servo valve?
A
Proportional: cheap (EUR 500-2000), 30-100 ms, medium accuracy — injection molding, construction. Servo: highest accuracy (sub-second response), expensive (EUR 5000-30000), oil-cleanliness sensitive (NAS 6) — aerospace, test rigs, precision machine tools.
Q Cartridge valves?
A
Modular within manifold blocks — space-saving, maintainable, low pressure loss. Bosch Rexroth and HAWE are cartridge specialists — widely used in injection-mold hydraulic blocks.