REXROTH 4WREE 6 Series 4/2 And 4/3 Proportional Directional Valves

REXROTH 4WREE 6 Series 4/2 and 4/3 proportional directional valves

Features – Direct operated proportional directional valve with electrical position feedback and integrated electronics (OBE) with type 4WREE – Control of flow direction and size – Operation by means of proportional solenoids with central thread and detachable coil – For subplate mounting: Porting pattern according to ISO 4401 – Spring-centered control spool – Control electronics • Type 4WREE: integrated electronics (OBE) with voltage or current input (A1 and/or F1) • Type 4WRE (4/3 version), separate order: - digital and analog amplifier in Euro-card format - analog amplifier in modular design • Type 4WRE…A (4/2 version), separate order: - analog amplifier in modular design

Without integrated electronics (OBE) = no code With integrated electronics (OBE) = E

Seal material V = FKM seals 1) Electronic interface A1 = Command value ±10 V F1 = Command value 4 to 20 mA no code = Type 4WRE Electrical connection Type 4WRE: K4 = Without mating connector, with connector according to DIN EN 175301-803 Mating connector (solenoid, position transducer), separate order, see page 8 Type 4WREE: K31 = Without mating connector, with connector according to DIN EN 175201-804 Mating connector – separate order, see page 9 Supply voltage G24 = Direct voltage 24 V 2X = 20 to 29 (20 to 29: unchanged installation and connection dimensions) Rated flow at valve pressure differential Δp = 10 bar Size 6 04 = 4 l/min 08 = 8 l/min 16 = 16 l/min 32 = 32 l/min Size 10 25 = 25 l/min 50 = 50 l/min 75 = 75 l/min

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 → Connection from P to A and B to T via orifice-type cross-sections with progressive flow characteristic – Switching off of the solenoid (8) → The compression spring (3) brings the control spool (2) back into the central position In the de-energized condition, the control spool (2) is held in a mechanical central position by the return springs. 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.

The 4/2 and 4/3 proportional directional valves are designed as direct operated devices in plate design. Operation is effected by proportional solenoids with central thread and detachable coil. The solenoids are controlled by the internal electronics

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 → Connection from P to A and B to T via orifice-type crosssections with progressive flow characteristic – Switching off of the solenoid (8) → The compression spring (3) brings the control spool (2) back into the central position In the de-energized condition, the control spool (2) is held in a mechanical central position by the return springs. 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

 

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