Hydraulic Proportional – Can Valve Pressure Drop Be Too High?

Yes, valve ?p over 50% system pressure is high

Avoid over-flowing valve! curve 5

High flow forces try to center spool on direct operated proportional valves

High ?p in a proportional valve creates a high rotational force

Anti-Rotation design prevents spinning spools, but limit time at extreme conditions to avoid problems

Sleeve and Spool valves do not have rotational forces

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