Proportional directional valve, direct operated, with electrical position feedback and integrated electronics (OBE) 4WREE-3X

Description

• Size 6
• Component series 3X
• Maximum operating pressure 350 bar
• Maximum flow 80 l/min
• Nominal flow (Δp = 10 bar) 4 … 32 l/min

Features

• 4/2 or 4/3 directional design
• For subplate mounting
• Porting pattern according to ISO 4401-03-02-0-05
• Control of flow direction and size
• Actuation by proportional solenoids with central thread
• Spring-centered control spool
• Integrated control electronics (OBE) with voltage or current input ("A1" or "F1")

Product description

The type 4WREE valve is a direct operated proportional directional valve with electrical position feedback and integrated electronics (OBE).

Set-up

The valve basically consists of:

• Housing (1) with connection surface

• Control spool (2) with compression springs (3 and 4) and spring plate (5 and 6)

• Solenoids (7 and 8) with central thread

• Position transducer (9)

• Integrated electronics (13)

• Electric zero point adjustment (12) accessible via the rubber plug

Function

• With de-energized solenoids (7 and 8), central position of the control spool (2) by compression springs (3 and 4) between spring plates (5 and 6)

• Direct operation of the control spool (2) by controlling a proportional solenoid, e.g. solenoid "b" (8)
  • Displacement of the control spool (2) to the left proportional to the electric input signal
  • This opens the connection from P to A and B to T via orifice-type cross-sections with progressive flow characteristic

In the de-energized condition, the control spool (2) is held in a mechanical central position by the return springs of the solenoids. With control spool symbol "V", this position does not correspond to the hydraulic central position! When the electric valve control loop is closed, the control spool is positioned in the hydraulic central position.

Valve with 2 spool positions (version "4WREE…A…")

The function of this valve version basically corresponds to the valve with three spool positions. The 2 spool position valves are, however, only equipped with solenoid "a" (7). Instead of the 2nd proportional solenoid, there is a plug screw (10).

Pressure compensation element in the OBE "-967"

To prevent condensate formation in the housing of the integrated electronics (OBE), an electronics protection membrane (11) can be used.

Recommended for use outside industry-standard conditions with high ambient air humidity and significant cyclic temperature changes (e. g. outdoors).

Notes:

• Due to the design principle, internal leakage is inherent to the valves, which may increase over the life cycle.

• The tank line must not be allowed to run empty. With corresponding installation conditions, a preload valve (preload pressure approx. 2 bar) must be installed.

• The PG fitting (14) must not be opened.

Type code

Technical data

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

general

hydraulic

Notice:

The specified technical data were measured with HLP46 and ϑÖl = 40 ±5 °C.

static / dynamic

electrical, integrated electronics (OBE)

Diagrams/characteristic curves

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

Pressure/signal characteristic curve (symbol V), ps = 100 bar

Leakage flow with central control spool position

Version "V32"

Rated flow 4 l/min

(P → A; B → T or P → B; A → T)

Rated flow 8 l/min

(P → A; B → T or P → B; A → T)

Rated flow 16 l/min

(P → A; B → T or P → B; A → T)

Rated flow 32 l/min

(P → A; B → T or P → B; A → T)

Notices:

• Flow values in the maximum command value range (see tolerance field of the flow/signal function)

• ∆p = pP – pL – pT

• ∆p valve pressure differential
  pP inlet pressur
  pL load pressure
  pT return flow pressure

Transition function with stepped electric input signals (4/3 directional design)

Frequency response characteristic curves

Flow / load function with maximum valve opening

(P → A; B → T or P → B; A → T)

Notice:

If the valve is operated outside the specified power limits for more than 10 seconds, the solenoid current is reduced by a ramp in order to avoid overload.

Symbols/Circuit diagrams

Notice:

Representation according to ISO 1219-1. Hydraulic interim positions are shown by dashes.

Electrical connection

Block diagram / pin assignment

Notice:

Electrical signals provided via control electronics (e.g. actual value) must not be used to switch off safety-relevant machine functions.

Connector pin assignment

	Command value	Positive command value (0 … 10 V or 12 … 20 mA) at D and reference potential at E cause flow from P → A and B → T.
		Negative command value (0 … –10 V or 12 … 4 mA) at D and reference potential at E cause flow from P → B and A → T.
		With valves with solenoid on side a (symbols EA and WA), a positive command value 0 ... +10 V or 4 ... 20 mA at D and reference potential at E result in flow from P → B and A → T.
	Actual value	Actual value (0 … 10 V or 12 … 20 mA) at F and reference potential at C cause flow from P → B and A → T.
		With valves with one solenoid, a positive actual value from 0 ... +10 V or 4 ... 20 mA at F and reference potential at C cause flow from P → B and A → T.
	Connection cable (recommendation)	Up to 20 m cable length type LiYCY 7 x 0.75 mm2
		Up to 50 m cable length type LiYCY 7 x 1.0 mm2
		Apply screening on supply side

Notice:

Mating connectors, separate order, see "Accessories" and datasheet 08006.

Dimensions

Dimensions in mm

Required surface quality of the valve contact surface

Notices:

The dimensions are nominal dimensions which are subject to tolerances.

Mating connectors, separate order, see "Accessories" and datasheet 08006.

Valve mounting screws (separate order)

Notice:

The tightening torque of the hexagon socket head cap screws refers to the maximum operating pressure.

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

Accessories

Mating connectors for valves with round connector, 6-pole + PE

7P Z31

Mating connectors for valves with round connector, 6-pole + PE

7P Z31

• For valves with round connector according to EN 175201-804, 6-pole + PE as well as 6-pole, compatible with VG 95328

• Data sheet

• Spare parts and repair

Mating connectors for valves with round connector, 6-pole + PE, shielded, with assembled connection line

7P Z31 +

Mating connectors for valves with round connector, 6-pole + PE, shielded, with assembled connection line

7P Z31 +

• For valves with round connector according to EN 175201-804, 6-pole + PE as well as 6-pole, compatible with VG 95328

• Data sheet

• Spare parts and repair

Analog command value module

VT-SWMA-1-1X

Analog command value module

VT-SWMA-1-1X

• Component series 1X
• Analog, Modular design
• Suitable for controlling valves with integrated electronics

• Data sheet

• Configurator / CAD

• Spare parts and repair

Command value module

VT-SWMAK-1-1X

Command value module

VT-SWMAK-1-1X

• Component series 1X
• Analog, Modular design
• For controlling valves with integrated or external electronics

• Data sheet

• Configurator / CAD

• Spare parts and repair

Digital command value and controller card

VT-HACD-1-1X

Digital command value and controller card

VT-HACD-1-1X

• Component series 1X
• For controlling up to 2 control circuits
• Use as command value card for generating, linking and normalizing signals
• Use as controller card for control loops with PIDT1 controller and optional state feedback

• Data sheet

• Operating instructions

• Commissioning instruction

• Information notes on the change-over

• Commissioning instructions PROFIBUS DP interface

• Commissioning instructions CANopen interface

• Commissioning instructions DeviceNet interface

• Technical information

• Environmental compatibility statement

• Spare parts and repair

Subplates

Subplates

Ordering codes

Downloads

	Declaration on environmental compatibility for EMC, climate and mechanical load Data Sheet | RE29061-U | 2003-07-01 | English | PDF | 145k Product Groups: Direct operated 4WREE 6-2X, 4WREE10-2X
	Proportional-Wegeventile, direktgesteuert, mit elektrischer Wegrückführung und integrierter Elektronik (OBE) Data Sheet | RD29105 | 2018-12-01 | German | PDF | 605k Product Groups: Direct operated Typ 4WREE