Hydraulic Proportional – Nominal Flow Rating of Proportionals

“Nominal Flow” for proportional spools is rated at ?p = 10 bar (145 psi) total, 5 bar per land

Example 4WRA “Nominal Flow” is 7 to 60 LPM rated @ ?p =10 bar (145 psi )

Only 145 psi pressure drop across valve!
– This is a not typical for applications
– Avoid to common mistake:
Supersizing spool = poor resolution

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