Bosch Rexroth | 4WRZ25W6-325-7X6EG24N9ETK4D3M
4WRZ25W6-325-7X/6EG24N9ETK4/D3M
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The 4WRZ25W6-325-7X/6EG24N9ETK4/D3M is a valve produced by Bosch Rexroth within the WRZ Proportional Directional Valves series, intended to meter flow to hydraulic cylinders or motors in automated machinery. Valve size 25 establishes the mounting envelope and matches large manifold cavities. The W6 spool form shapes the flow paths so that proportional commands translate into predictable actuator movement. A nominal flow capability of 325 l/min at a 10 bar differential allows the unit to supply high-demand circuits, while a maximum operating pressure of 350 bar supports high-pressure systems without derating. Internal pilot supply and drain simplify plumbing because no external pilot lines are required. Electrical actuation relies on a 24 V DC supply, and the coil may draw up to 1.5 A, parameters that fit standard industrial power stages. The single plug conforming to DIN EN 175301-803 style K4 streamlines wiring, and an IP65 housing rating prevents dust ingress and water jets during routine wash-downs.
Pilot functions are tuned by a pressure-reducing insert D3 (type ZDR 6 DP0-4X/40YM-W80), and the pilot stage consumes only 7 l/min when driven from zero to full command, limiting load on the auxiliary circuit. Mineral oils of the HL or HLP classes defined in DIN 51524 are the approved mediums, provided their cleanliness stays at ISO 4406 code 20/18/15; this cleanliness helps maintain spool accuracy and long service life. A concealed manual override identified as N9 lets technicians shift the spool during commissioning without energizing the coil. The porting pattern follows ISO 4401-08-07-0-94, guaranteeing interchangeability with common subplates. Dynamic seals are made of NBR, so the valve suits petroleum-based fluids and standard temperature ranges. Together these attributes give the 4WRZ25W6-325-7X/6EG24N9ETK4/D3M reliable pilot control, straightforward service access, and compatibility with existing ISO manifolds.
Technical Specifications
Electrical Connection
DIN EN 175301-803 (K4)
Fluid Cleanliness Class
ISO 4406 20/18/15 (Main)
Hydraulic Fluid
Mineral Oil (HL, HLP) DIN 51524
Manual Override
Concealed (N9)
Max Coil Current
1.5 A
Max Operating Pressure (main)
350 bar
Nominal Flow (Δp=10 Bar)
325 l/min
Pilot Oil Flow (step 0–100%)
7 l/min
Pilot Pressure Reducing Valve
D3 (ZDR 6 DP0-4X/40YM-W80)
Pilot Supply/drain
Internal/Internal (ET)
Porting Pattern
ISO 4401-08-07-0-94
Seal Material
NBR (M)
Spool Type
W6
Supply Voltage
24 V DC
Type Of Protection
IP65
Valve Size
25
1620 Old Apex Road
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