Description Size 6 Component series 2X Maximum operating pressure 315 bar Maximum flow 80 l/min Features Direct operated proportional directional valve with electrical position feedback and external electronics 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 Product description Type 4WRE...-2X/... The 4/2 and 4/3 proportional directional valves are designed as direct operated devices in plate design. Operation by means of proportional solenoids with central thread and detachable coil. The solenoids are controlled by external electronics. Set-up: The valve basically consists of: Housing (1) with connection surface Control spool (2) with compression springs (3 and 4) and spring plates (5 and 6) Solenoids (7 and 8) with central thread Position transducer (9) With de-energized solenoids (7 and 8), central position of the control spool (2) due to compression springs (3 and 4) between the spring plates (5 and 6) Direct actuation of the control spool (2) by the control of one proportional solenoid, e. g. solenoid "b" (8) Control spool (2) is moved to the left in proportion to the electrical input signal Connection from P to A and B to T via orifice-type cross-sections with progressive flow characteristics Switching off of the solenoid (8) Control spool (2) is returned to the central position by the compression spring (3) Function: In the de-energized state, the control spool (2) is held in a mechanical central position by the return spring 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. Important notice: The PG fitting (11) must not be opened. Mechanical adjustment of the adjustment nut located below is prohibited and damages the valve! Valve with two spool positions: (Type 4WRE…A...) The function of this valve version basically corresponds to the valve with three spool positions. The 2 spool position valve is, however, only equipped with solenoid “a” (7). Instead of the 2nd proportional solenoid, a plug screw (10) is installed. Notice: Due to the design principle, internal leakage which may increase over the life cycle is inherent to the valves. Notice: 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. Type code 01 02 03 04 05 06 07 08 09 10 4 WRE ‒ 2X / G24 K4 / * 01 4 main ports 4 02 Proportional directional valve with electrical position feedback WRE 03 Size 6 6 Size 10 10 04 Symbols; for the possible version, see "Symbols/Circuit diagrams" E; E1-; V; V1-; W; W1-; EA; WA Rated flow NG6 05 4 l/min 4 8 l/min 8 16 l/min 16 32 l/min 32 Rated flow NG10 05 25 l/min 25 50 l/min 50 75 l/min 75 06 Component s
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