EDB-P

Description

Valve element with direct proportional control of spool.

Control spools operated by solenoids with removable coils.

In the de-energized condition, the control spool is held in the central position by return springs.

Wet pin proportional tubes for DC coils, with push rod for mechanical override; nickel plated surface.

Manual override (push-button or screw type) available as option.

Size 4

Series 00

Maximum operating pressure 310 bar (4500 psi)

Maximum flow 17 l/min (4.5 gpm)

Port connections G 3/8 SAE6 - Μ16x1.5

1) With Δp (P > T) 10 bar (145 psi), corresponding approx. to Δp P>A,B 5 bar (73 psi).

2) For connectors ordering code see data sheet RE 18325-90.

Description

The sandwich plate design directional valve elements B8080... are compact direct operated proportional solenoid valves which control the start, the stop, the direction and the quantity of the oil flow. These elements basically consist of a stackable housing (1) with a control spool (2), one or two solenoids (5), and one or two return springs (4).

Energized by an electronic feed regulator, each solenoid (5) displaces the control spool (2) from its neutral-central position "0" proportionally to the current received, in open loop mode; a regulated oil flow Ρ to A , or Ρ to B, is achieved. Once the solenoid is de-energized, the return spring (4) pushes the spool thrust washer (3) back against the housing and the spool (2) returns in its neutral-central position "0".

Each coil is fastened to the solenoid tube (5) by a ring nut (6). A pin (7) allows to push the spool (2) in emergency conditions, when the solenoid cannot be energized, like in case of voltage shortage.