Parker Hannifin VO40 manual Spool Function, Open-Center Directional Control Valve

Catalog HY17-8505/UK		Open-Center Directional Control Valve
Ordering Information – Work Sections		VO40
[60] – Spool Function
D
	Double-acting (4-way) spool. Work ports blocked in the
	neutral position.

EA Single-acting (3-way) spool. Port “A” blocked in neutral.

Port “A” is active and Port “B” is plugged.

EB Single-acting (3-way) spool. Port “B” blocked in neutral.

Port “B” is active and Port “A” is plugged.

M Double-acting (4-way) spool. Work ports open to tank in the neutral position. Note: A work section with this spool does not have a transition check (load check).

F Double-acting (4-way) spool with a 4th position in which both work ports are connected to tank (float position). Work ports are blocked in the neutral position.

DM Double-acting (4-way) spool. Work port pressure is bled to tank, when the spool is in the neutral position.

Bleed notch is designed for 1.9 LPM @ 69 bar.

(0.5 GPM @1000 PSI)

DA Double-acting (4-way) spool. Work port “A” pressure is bled to tank, when the spool is in the neutral position.

Bleed notch is designed for 0.5 GPM @1000 PSI.

(1.9 LPM @ 69 Bar)

DB Double-acting (4-way) spool. Work port “B” pressure is bled to tank, when the spool is in the neutral position.

Bleed notch is designed for 0.5 GPM @1000 PSI.

(1.9 LPM @ 69 Bar)

19 Parker Hannifin Corporation