ED4-PT1

Valve element with direct proportional control of spool. Proportional, non pressure compensated, valve element for partial or total unloading to Tank of P flow.

Control spool operated by solenoids with removable coils.

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

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

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

Size 6

Series 00

Maximum operating pressure 310 bar (4500 psi)

Maximum flow 35 l/min (9.2 gpm)

NEW spool position sensor available for this valve. See RE18300-30

The sandwich plate design valve elements L808103P… are compact direct operated proportional solenoid valves which divert totally or partially the inlet P flow to Tank.

These elements basically consist of a stackable housing (1) with a control spool (2), one solenoid (3), and one return spring (4).

With the solenoid de-energized, the return spring (4) keeps the spool (2) in its rest position “0” and all the inlet P flow passes through the valve and is unloaded to Tank. When energized by the electronic feed regulator, the solenoid (3) displaces the control spool (2) from its rest position proportionally to the current received and proportionally restricts the flow area to Tank. A regulated, non pressure compensated, oil flow is diverted from P to T and the remaining amount of inlet flow in the P line remains available for the downstream operators.

The coil (3) is fastened to the solenoid tube by a ring nut (5).

A pin (6) allows to push the spool (2) in emergency conditions, when the solenoid cannot be energized, like in case of voltage shortage.

Supply: yellow LED, lit up with power ON.

Off Set: minimum current adjustment. Adjust solenoid current so that the desired minimum value is obtained. Clockwise rotation increases current.

Ramp up: Ramping up time adjustment.

Ramp down: Ramping down time adjustment.

For longer ramping times, turn potentiometers clockwise; for shorter ramping times, turn the potentiometers counter-clockwise.

Full load current: Maximum current adjustment. Adjust solenoid current so that the desired maximum value is obtained (up to 2A). Clockwise rotation increases current.

Frequency adjustment: it is possible to set the PWM frequency obtaining the desired control sensitivity. After removing the external plastic cover, turn the adjusting screw; clockwise rotation increases frequency from 100 to 500 Hz.