4/3, 4/2 and 3/2 directional valve with wet-pin AC or DC solenoid, type WE10...L5X

Function and configuration

WE10-L5X directional valves are solenoid operated directional spool valves. They control the start, stop and direction of flow with the additional option of adjusting the spool switching time.

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

In 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 valves without spring "O").

If the wet-pin electronic solenoid (2) is energized, the control spool (3) moves out of its rest position into the required end position. In this way, the required direction of flow according to the selected symbol is released. After the electronic solenoid (2) has been switched off, the control spool (3) is pushed back into its central position or into its initial position (except for valves with "OF" detent and valves without type "O" spring). A manual override (6) allows for the manual switching of the valve without solenoid energization.

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

Adjustable spool switching time (only with DC solenoids)

The optional installation of a throttle screw (7) or orifice (8) -see below- offers the possibility of increasing the switching time to 100ms or more for WE10-L5X series of 5-chamber directional valves. The switching time is influenced by factors such as pressure, flow rate and oil viscosity, depending on the situation of installation. When the main spool (3) is in the neutral or initial position, the spring chambers at both sides are filled with oil when reversing the spool, the oil in the spring chamber flows through the connecting channel (9) to move the spool forward. The adjustment time can be adjusted according to actual needs by limiting the connection channel (9) (such as screwing in the throttle screw or installing the orifice to reduce the overcurrent area).

Function and configuration

Type WE10.L5X/O...

(only possible with symbols A, C and D)

This version is a directional valve with 2 switched positions and 2 solenoids without detent. There is no defined spool position in the de-energized condition.

Type WE10.L5X/OF...(Impulse spool)

(only possible with symbols A, C and D)

This version is a directional valve with 2 detented switched positions and 2 solenoids. Thus, the spool is held in the last switched position, permanent energization of the solenoid is not required.

Throttle insert

(Type 4WE10.L5X/.../B...)

The use of a throttle insert is required, due to the operating conditions. Flows can occur during the switching process which are larger than the performance limits of the valve allow.

The orifice is to be inserted into the P channel of the directional valve.

Ordering code

Symbol

Technical data

Electrical data

When connecting the electrics, the protective conductor ( PE ⏚ ) must be connected according to the relevant regulations.

Note:

The solenoid coils must not be painted. Actuation of the manual override is only possible up to a tank pressure of approx. 50 bar [725 psi]. The simultaneous actuation of 2 solenoids of one valve must be ruled out!

Characteristic curves (Measured with HLP46, ϑoil=40℃±5℃ [104±9℉])

Performance limits (Measured with HLP46, ϑoil=40℃±5℃ [104±9℉])

Due to the flow forces acting within the valves, the admissible performance limits may be considerably lower with only one direction of flow (e.g. from P to A while port B is blocked)!

In such cases of application, please consult us! The switching performance limit was established while the solenoids were at operating temperature, at 15% undervoltage and without tank preloading.

Unit dimensions