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At 325 l/min the pressure in a shared return line with cooler and filter rises noticeably. The 4WRZ25W8-325-7X/6EG24N9EK4/M therefore drains its pilot oil externally while the supply stays internal. Spool symbol W8, 19.78 kg.
Proportional Directional Valve 4WRZ25W8-325-7X/6EG24N9EK4/M - Bosch Rexroth R900975643
BOSCH REXROTH
Original product
Net price (excl. VAT)
€4,056.53
Item
BRR-R900975643
Manufacturer no.
R900975643
Personal expert advice
Brand new
Specialist dealer since 2009
Original product
Worldwide shipping
Product data
Manufacturer no.R900975643
Country of originGermany
ConditionNew
Artikel
BRR-R900975643
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Large flows build back pressure in a return line carrying a cooler and a return filter, and that affects pilot control. The 4WRZ25W8-325-7X/6EG24N9EK4/M therefore drains pilot oil through a dedicated Y line and controls 325 l/min nominal flow.
Benefits
- External pilot drain, cooler and return filter do not affect pilot control.
- Internal supply from the main circuit, a separate X line is dropped.
- 325 l/min nominal flow, flow up to 870 l/min, spool symbol W8.
- 19.78 kg weight in size 25, 350 bar maximum operating pressure, NBR seals.
- Concealed auxiliary actuation and control at 24 VDC through an external amplifier.
Technical data
| Connection diagram | ISO 4401-08-08-0-05 |
| Max. flow | 870 l/min |
| Product family | 4WRZ(E) |
| Type of connection | Subplate mounting |
| Nominal flow | 325 l/min |
| Supply voltage | 24 VDC |
| Number of switching positions | 3 |
| Hydraulic fluid | HL |
| Number of ports | 4 |
| Electrical connection description | Connector, 7-pole (6 + PE) according to EN 175201-804 |
| Spool symbol | Symbol W8 |
| Operating pressure, max. | 350 bar |
| Size | 25 |
| Seals | NBR |
| Electrical connector | Connector, 3-pole (2 + PE) |
| Type of actuation | Electrical with external electronics |
| Weight | 19.78 kg |
Applications
Typical plants are presses and power units with return cooling where rapid traverse loads the return path. The separate Y line carries pilot oil into the tank without pressure. Control behaviour then stays the same across the whole cycle.
Manufacturer
Bosch Rexroth, material number R900975643. Permitted back pressure in the Y line is given in data sheet RE 29115, and the range is described in RE 07600-B.
| Hersteller-Nr | R900975643 |
|---|---|
| Manufacturer | Bosch Rexroth |
| Country of Manufacture | Germany |
| Weight | 19.780000 |
| GPSR Herstellerdaten | Bosch Rexroth AG, Zum Eisengießer 1, DE-97816 Lohr am Main, www.boschrexroth.com |
| Artikel-Authentizität | Original product |
| Artikelzustand | New |
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