Directional spool valves, direct operated, with solenoid actuation WE 6 …XM

Description

• Size 6
• Component series 5X
• Maximum operating pressure 210 bar
• Maximum flow 20 l/min
• Area of application in accordance with the Explosion Protection Directive 2014/34/EU: I M2
• Type of protection valve:
  Ex h I Mb according to EN 80079-38
• Type of protection valve solenoid:
  Ex ib I Mb according to EN 60079-0
• Valve solenoid certified according to IECEx

Features

• 4/3-, 4/2- or 3/2-way version
• For intended use in potentially explosive atmosphere
• Porting pattern according to ISO 4401-03-02-0-05
• Wet-pin DC solenoids
• Electrical connection optionally with:
  – Individual connection with cable gland
  – 2 m connection line
  – connector
• With manual override

Product description

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

For unobjectionable functioning, the hydraulic system has to be bled properly.

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.

A 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.

Notices:

• he valve must not be allowed to run empty. With corresponding installation conditions, a preload valve (preload pressure approx. 2 bar) must be installed. For design reasons, internal leakage is inherent to the valves, which may increase over the life cycle.

• Please observe possible pressure conversion in the event of a differential cylinder. If pressure is led to the chamber on the piston side and the outflow of hydraulic fluid is blocked from the chamber on the rod side, it might lead to a pressure intensification and inadmissible high pressure on the rod side. This may damage cylinders, supply lines and connected valves.

Type 4WE 6 E5X/.B.X.K20L/..

Throttle insert

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.

Type code

Notices:

• The manual override cannot be allocated a safety function and may only be used up to a tank pressure of 50 bar.

• For possible combinations for the ordering code "Solenoid", "Electrical connection" and "Explosion protection" see "Technical data".

Technical data

general

hydraulic

electrical

Information on explosion protection

Special application conditions for a safe application

• Connection lines must be passed in a strain-relieved way. The first mounting point must be within 150 mm of the valve solenoid.

• In case of valves with two solenoids, maximally one of the solenoids may be energized at a time.

• The maximum temperature of the surface of the valve jacket is 80 °C. This has to be considered when selecting the connection cable and/or contact of the connection cable with the surface of the jacket is to be prevented.

(For applications outside these values, please consult us!)

Diagrams/characteristic curves

(measured with HLP46, ϑOil = 40 ±5 °C)

Δp-qV characteristic curves

Performance limits

(measured with HLP46, ϑOil = 40 ±5 °C)

Notice:

The specified performance limits are valid for operation with two directions of flow (e.g. from P to A and simultaneous return flow from B to T).
Due to the flow forces acting within the valves, the possible performance limit may be considerably lower with only one direction of flow (e.g. from P to A while port B is blocked).
The performance limits were determined when the solenoids were at operating temperature, at 10% undervoltage and without tank preloading.

Symbols/Circuit diagrams

Notice:

Representation according to ISO 1219-1.

Hydraulic interim positions are shown by dashes.

Electrical connection

The type-examination tested valve solenoid is equipped with an electrical connection according to the following table. The electrical connection of the solenoid is polarity-independent.

Ordering code for electrical connection	Type of connection Description	Circuit diagram	Ordering code solenoid, availability
CKL	Electrical connection via non-exchangeable, two-core connection line, blue Operating display via light emitting diode (LED), red		G12–13 (130 mA) G12–19 (190 mA)
	Connection line, two-core
	Line cross-section	0.75 mm2 finely stranded
	Line diameter	approx. 5.6 mm
	Length	2 m
Z2	Electrical connection via 2-pole terminal in terminal box With cable gland Without operating display		G12–12 (120 mA)
	Cable gland
	Threaded connection	M20x1.5
	Line diameter	6.5 ... 9.5 mm
	Sealing	Outer sheath sealing
	Cable
	Temperature rating	≤-20 … ≥+80 °C
	Connection terminal solenoid
	Line cross-section	0.75 ... 1.5 mm2
K20L	Electrical connection via connector, 3-pole with pin contacts, type 845-11-1125-001, FCI/Souriau Operating display via light emitting diode (LED), red Suitable mating connector, type 845-11-8522-001 (FCI/Souriau, separate order)		G12–19 (190 mA)
	Cable
	Temperature rating	≤-20 … ≥+80 °C

Notice:

Only use finely stranded conductors if they have pressed-on wire end ferrules.

Dimensions

Version "K20L"

Dimensions in mm

Required surface quality of the valve contact surface

Version "CKL"

Dimensions in mm

Required surface quality of the valve contact surface

Version "Z2"

Dimensions in mm

Required surface quality of the valve contact surface

Valve mounting screws (separate order)

Notice:

Only use valve mounting screws with the listed thread diameters and strength properties. Observe the screw-in depth.

Subplates (separate order) with porting pattern according to ISO 4401-03-02-0-05, see data sheet 45100.

Notices:

• Subplates are no components in the sense of directive 2014/34/EU and can be used after the manufacturer of the overall system has conducted an assessment of the risk of ignition. The "G...J3" versions are free from aluminum and/or magnesium and galvanized.

• The dimensions are nominal dimensions which are subject to tolerances.

Installation conditions

(Dimensions in mm)

Dimensions in mm

Notice:

Please observe the "Special conditions for safe use".

Accessories

Subplates

Subplates

Ordering codes

Downloads

	Directional spool valves, direct operated, with solenoid actuation Data Sheet | RE23177-XH | 2021-05-01 | English | PDF | 652k Product Groups: Directional spool valves Type WE …XH and WE …XM
	Directional spool valves, direct operated, with solenoid actuation Manual | RE23177-XH-B | 2021-05-01 | English | PDF | 1.6MB Product Groups: Industrial Hydraulics I M2 (WE6..5X/...XM...) II 2G (WE6..5X/...XH...)
	Explosion-protected hydraulic products for industrial and mobile applications Brochure | R999000373 | 2017-03-01 | English | PDF | 5.8MB Product Groups: Pumps, CD - single rod cylinder, Proportional, high-response and servo valves, Axial piston pumps, Mobile controls Product overview