Hydraulic Proportional – Asymmetrical Spools

Asymmetric spools like E1-, W1-, V1-
– 2:1 flow area (4 notches vs. 2 notches)
– For differential area cylinders

Balances ?p across each flow path, due to unequal flows to/from cylinder
– Can prevent cylinder cavitation
– May improve cycle time
Better deceleration
Shorter reversal time

This is more important with larger flow valves


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