Compact Directional Valves - Pre-compensated - Directional elements EDG series

EDG-OBE

4/3 Proportional directional valve elements EDG-OBE with LS - On Board Electronics

Overview


General specifications

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. Thanks to modularity concept, it's possible to combine stacks of flexible sections across the entire EDG family. The new On Board Electronics (OBE) module ensures the maximum efficiency in all working conditions, thanks to a control loop that allows an integration and communication between sensors and hydraulic components.

  • Size 6
  • Maximum operating pressure: 350 bar (5000 psi) on pump side, 350 bar (5000 psi) on consumer side
  • Maximum flow at 8 bar bias spring (116 psi): 60 l/min (15.8 gpm)
  • Ports connections G 3/8 - G 1/2 - SAE8
  • C-Samples available starting from January 2024

Main Field of Application

  • Truck mounted applications
  • Forestry machinery
  • Forklifts and Telehandler
  • Municipal vehicles
  • Cranes
  • Construction machines
  • Mobile elevating working platforms
  • Heavy duty vehicles
  • Agricultural machines
RE18301-35_Order_2025-01-30 RE18301-35_Order2_2025-01-30 RE18301-35_Order3_2025-01-30

General hydraulic layout

RE18301-35_sym_2025-01-30

Secondary valve types

RE18301-35_fig2_2025-01-30
RE18301-35_fig3_2025-01-30

The EDG OBE pilot operated proportional sectional valves with pressure compensation controls the oil flow to actuators with a close loop.

These elements consist of a stackable housing (1) with a control spool (2), an On Board Electronics (OBE) module (4), one return spring (3). The OBE module (4) displaces the control spool from its neutral-central position “0” proportionally to the current received, with a control in close loop. When the spool is shifted and the metering notch is open, flow delivery starts and is controlled by a 2 way pressure compensator (5) (P > A; P > B).

Load pressure compensation

The pressure compensator (5) keeps the pressure differential on the main spool (2). The flow to the consumers remains constant, despite varying loads. Port relief valves with anti-cavitation function on A and B (7) protect the system against pressure peaks and cavitation. LS relief valves (6), for each consumer port, can be adjusted according to specific application requirements.

1 Identification label.

2 Flange specifications. For tie rod and tightening torque information see data sheet RE 18301-92.

RE18301-35_dim_2025-01-30
RE18301-35_fig4_2025-01-30