EDG-DO...B1 - EDG-DO...R1

The inlet section can be configured for either a fixed displacement pump or load-sense variable displacement pump. When simultaneous machine functions are actuated, the pre-compensators will automatically adjust to the highest load pressure via a shuttle arrangement, making the system circuit independent of variations in loads and pump pressures.

- EDG-DO with Cross Piloted Counterbalance (B1)

incorporates one or two Cross Piloted Counterbalance valves which allow free flow toward the A and B outlet ports, and lock in a leak free mode the flow returning from the actuator. Pilot pressure in the opposite line reduces the pressure setting of the counterbalance valve in proportion to the pilot ratio (4:1) until opening and allowing the flow return from the actuator. The pressure setting should be at least 1,3 times the highest expected load. Depending on the version selected, the counterbalance function can be double-acting or single-acting (only A ,only B or both A and B ports).

- EDG-DO with Cross Piloted Check Valve (R1) incorporates one or two Cross Piloted Check Valves which allow free flow toward the A and B outlet ports, and lock in a leak free mode the flow returning from the actuator, until sufficient pilot pressure is built up in the opposite line and the check valve is opened.

Size 6

Series 1

Maximum operating pressure:

350 bar (5000 psi) on pump side

350 bar (5000 psi) on consumer side

Maximum flow at 6 bar (87 psi) 40 l/min (10.6 gpm)

Ports connections G 3/8 - G 1/2 - SAE6 - SAE8

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

Main Field of Application

Truck mounted applications

Forestry machinery

Forklifts and Telehandler

Municipal vehicles

Cranes

Construction machines

Aerial working platforms

Heavy duty vehicles

Agricultural machines

New Series 1 features:

• Pole tube and coil (emproved corrosion resistance duration up to 500h)
• Label
• Flange with drain line for VMGLS and combination for EDG Electrohydraulic actuation
• Body valve zinc plating treatment for higher corrosion resistence protection up to 500h

Table 1

Table 2

Table 3 Counterbalance valve configuration setting

Table 4 R1 secondary valve types

The EDG direct acting On-Off solenoid sectional valves with pressure compensation control the oil flow to actuators. These elements consist of a stackable housing (1) with a control spool (2), two solenoids (4), two return springs (3). Each solenoid (4), energized, displaces the control spool from its neutral-central position. When the spool is shifted, flow delivery starts and is controlled by a 2 way pressure compensator (7) (P > A; P > B).

When the solenoid is de-energized, the return spring pushes the spool back in its neutral-central position. Each coil (4) is fastened to the solenoid tube by the ring nut (5). A push-pin manual override is included to actuate the valve without electrical power as needed.

Load pressure compensation

The pressure compensator (7) keeps the pressure differential on the main spool (2). The fl ow to the consumers remains constant, despite varying loads. The highest load pressure on the pump is signaled via the LS line and the integrated shuttle valve (6).

Port relief valves with anti-cavitation function on A and B (9) protect the system against pressure peaks and cavitation. LS relief valves (8), for each consumer port, can be adjusted according to specific application requirements.