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Internal pilot oil supply saves a line, while external return keeps pilot control free of back pressure. That is how this 4WRZE25W8-220 is built, at 220 l/min nominal flow, 350 bar operating pressure and an analog ±10 V command.
Proportional Directional Valve 4WRZE25W8-220-7X/6EG24EK31/A1D3M - Bosch Rexroth R901068690
BOSCH REXROTH
Original product
Net price (excl. VAT)
€4,498.82
Item
BRR-R901068690
Manufacturer no.
R901068690
Personal expert advice
Brand new
Specialist dealer since 2009
Original product
Worldwide shipping
Product data
Manufacturer no.R901068690
Country of originGermany
ConditionNew
Artikel
BRR-R901068690
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Return filters and oil coolers create back pressure that slows the pilot stage of a directional valve. The 4WRZE25W8-220-7X/6EG24EK31/A1D3M therefore drains pilot oil separately while still drawing it internally, at 220 l/min nominal flow and 350 bar.
Benefits
- External pilot oil return drains without back pressure and keeps switching time repeatable.
- Internal pilot oil supply removes the need for a separate feed line.
- The integrated pressure reducing valve limits pilot pressure at system pressure up to 350 bar.
- 220 l/min nominal flow, 870 l/min maximum, spool symbol W8.
- Analog ±10 V command processed by the on-board electronics, mass 20.66 kg.
Technical data
| Conformity description | UKCA - Electromagnetic compatibility (EMC) SI2016/1091 |
| Connection diagram | ISO 4401-08-08-0-05 |
| Max. flow | 870 l/min |
| Product family | 4WRZ(E) |
| Type of connection | Subplate mounting |
| Nominal flow | 220 l/min |
| Conformity | UKCA |
| Supply voltage | 24 VDC |
| Connectivity | Analog, command value ±10 V |
| 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, 7-pole (6 + PE) |
| Type of actuation | Electrical with on-board electronics |
| Weight | 20.66 kg |
Applications
Sensible in systems with a shared return, long tank lines or return filters of high resistance. Pilot control then stays independent of the pressure conditions in the working return. Mounting pattern ISO 4401-08-08-0-05, UKCA conformity.
Manufacturer
Bosch Rexroth, material number R901068690. Two documents are on file, and the data sheet gives characteristic curves, limit values and a filtration recommendation.
| Hersteller-Nr | R901068690 |
|---|---|
| Manufacturer | Bosch Rexroth |
| Country of Manufacture | Germany |
| Weight | 3.580000 |
| GPSR Herstellerdaten | A1-ESD equipment GmbH. Keldersstr. 15, DE-42697 Solingen, www.esd.equipment |
| Artikel-Authentizität | Original product |
| Artikelzustand | New |
| Position sensing | No |
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