Description Size 10, 16, 25, 32 Component series 7X Maximum operating pressure 350 bar Maximum flow 1600 l/min Features Pilot-operated 2-stage proportional directional valve without integrated electronics (OBE) Control of the direction and magnitude of a flow Operation by means of proportional solenoids with central thread and detachable coil For subplate mounting: Porting pattern according to ISO 4401 Optional auxiliary operating device Spring-centered control spool Product description Pilot-operated proportional directional valves type 4WRZ(E)… and 5WRZ(E).52… Valves of type 4WRZ(E)... are pilot-operated 4-directional valves that are actuated by means of proportional solenoids. Their function is to control the flow direction and size. Valves of type 5WRZ(E)... are equipped with an additional port "R" (only NG52). Set-up: The valve basically consists of: Pilot control valve (9) with proportional solenoids (5 and 6) Main valve (10) with main control spool (11) and centering spring (12) Function: With de-energized solenoids (5, 6), the main control spool (11) is held in the central position by means of the centering spring (12) The main control spool (11) is controlled by the pilot control valve (9); the main control spool is proportionally moved, e.g. by actuating solenoid "b" (6) → The control spool (2) is moved to the right, pilot oil enters the pressure chamber (13) via the pilot control valve (9) and deflects the main control spool (11) proportionally to the electric input signal → Connection from P to A and B to T via orifice-type cross-sections with progressive flow characteristics Pilot oil supply to the pilot control valve internally via port P or externally via port X Switching off the solenoid (6) → The control spool (2) and main control spool (11) are moved back into the central position Depending on the spool position, flow occurs from P to A and B to T or P to B and A to T (R) An optional manual override (14 and 15) can be used to move the control spool (2) without solenoid energization. Notice: Accidental activation of the manual override may lead to uncontrolled machine movements! Notice: Due to the design principle, internal leakage which may increase over the life cycle is inherent to the valves. Type code 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 4 WRZ ‒ 7X / 6E G24 * 01 4 main ports 4 02 Proportional directional valve with electro-hydraulic operation and external electronics WRZ 03 Size 10 10 Size 16 16 Size 25 25 Size 32 32 Size 52 52 04 Symbols; for the possible version, see "Symbols/Circuit diagrams" E; E1-; E3-; W6-; W8-; W9-; EA; W6A Rated flow NG10 05 25 l/min 25 50 l/min 50 90 l/min 85 Rated flow NG16 05 100 l/min 100 125 l/min 125 150 l/min 150 180 l/min 180 Rated flow NG25 05 220 l/min 220 325 l/min 325 Rated flow NG32 05 360 l/min 360 520 l/min 520 Rated flow NG52 05 1000 l/min 1000 06 Component series 70 ... 79 (70 ... 79: unchanged installation and connection dimensions) 7X 07 For subplate mounting no code For
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