Bosch Rexroth | H-4WEH25W6X6EG24N9K4
H-4WEH25W6X/6EG24N9K4
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The H-4WEH25W6X/6EG24N9K4 valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth for hydraulic automation circuits. It has a nominal size of NG25, and its four-way configuration with three spool positions allows bidirectional cylinder control. The spool carries the W symbol, and in the neutral position the available cross-section is 14 mm². When supplied with oil at 350 bar, the valve can pass 650 l/min, matching the rated maximum operating pressure of 350 bar for the body. System fluid must stay within ISO 4406 cleanliness class 20/18/15 to protect internal lands and sealing edges.
Coil actuation is powered by 24 V DC and connects through the DIN EN 175301-803 K4 plug, while a concealed manual override (code N9) lets maintenance personnel shift the spool without power. Pilot oil enters externally at port X and exits externally at port Y, isolating pilot flow from the main channels. The pilot stage withstands pressures up to 250 bar, needs at least 13 bar to engage, and permits a return pressure of 210 bar during dynamic cycles. These features complete the control package and maintain predictable response in modular hydraulic systems.
Technical Specifications
Cleanliness Class (iso 4406)
20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (350 Bar, W)
650 l/min
Max Operating Pressure
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (x External)
13 bar
Nominal Size
NG25 (W.H 25)
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Pilot Return Max Pressure (dc)
210 bar
Spool Positions
3
Spool Symbol
W
Supply Voltage
24 V DC
Way Configuration
4-Way
Zero-position Cross-section (w, A–t/b–t)
14 mm²
1620 Old Apex Road
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