Rexroth Directional spool valves, direct operated, with solenoid actuation WE 6 …E..XE SERIES

• 4/3-, 4/2- or 3/2-way version
• For intended use in potentially explosive atmospher
  – Area of application in accordance with the Explosion Protection Directive 2014/34/EU: II 2G
  – Type of protection of the valve solenoids: Ex eb mb IIC T4 Gb according to EN 60079-7 / EN 60079-18
• Porting pattern according to ISO 4401-03-02-0-05
• wet-pin DC or AC solenoids
• Electrical connection with individual connection and cable gland
• With manual override, optional

Product description：

Directional valves of type WE are solenoid-actuated directional spool valves. They control the start, stop and direction of a flow.

The directional valves basically consist of the housing (1), one or two solenoids (2), the control spool (3), and one or two return springs (4).

In the de-energized condition, the control spool (3) is held in the central position or in the initial position by the return springs (4) (except for impulse spools). The control spool (3) is actuated by wet-pin solenoids (2).

To ensure proper functioning, make sure that the pressure chamber of the solenoid is filled with oil.

The force of the solenoid (2) acts via the plunger (5) on the control spool (3) and pushes the latter from its rest position to the required end position. This enables the necessary direction of flow from P → A and B → T or P → B and A → T.

After de-excitation of the solenoid (2), the return spring (4) pushes the control spool (3) back to its rest position.

An optional manual override (6) allows control spool (3) to be moved without solenoid energization.

 

Without spring return “O” (only possible with symbols A, C and D)

This version is a directional valve with two spool positions and two solenoids without detent.

In the de-energized condition, there is no defined spool position.

 

With spring return “OF”(impulse spool, only possible with symbols A, C and D)

This version is a directional valve with two spool positions, two solenoids and one detent. It alternately locks the two spool positions and the solenoid therefore does not need to be permanently energized.

Notice:

Pressure peaks in the tank line to two or several valves can result in unintended movements of the control spool in the case of valves with detent! We therefore recommend that separate return lines be provided or a check valve installed in the tank line.

For design reasons, internal leakage is inherent to the valves, which may increase over the life cycle.

Throttle insert “…B”

The use of a throttle insert is required when, due to prevailing operating conditions, flows occur during the switching processes, which exceed the performance limit of the valve.