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If neither port P nor the tank offers usable pilot pressure, the pilot oil is routed externally in both directions. The 4WRZ25W8-220-7X/6EG24N9K4/D3M works that way, meters 220 l/min to symbol W8 and weighs 20.88 kg.
Proportional Directional Valve 4WRZ25W8-220-7X/6EG24N9K4/D3M - Bosch Rexroth R900978826
BOSCH REXROTH
Original product
Net price (excl. VAT)
€4,287.35
Item
BRR-R900978826
Manufacturer no.
R900978826
Personal expert advice
Brand new
Specialist dealer since 2009
Original product
Worldwide shipping
Product data
Manufacturer no.R900978826
Country of originGermany
ConditionNew
Artikel
BRR-R900978826
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The 4WRZ25W8-220-7X/6EG24N9K4/D3M is a pilot-operated proportional directional valve in size 25 with symbol W8. Pilot oil is fed in externally and discharged externally, and nominal flow is 220 l/min.
Benefits
- External pilot oil supply and external return, independent of pressure and back pressure in the main circuit.
- Nominal flow 220 l/min, maximum 870 l/min at 350 bar operating pressure.
- Spool symbol W8 with 3 switching positions and 4 ports.
- Integrated pressure reducing valve in the pilot stage, plus a concealed auxiliary actuation.
- 20.88 kg, NBR seals, external electronics, connection diagram ISO 4401-08-08-0-05.
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 | 220 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 | 20.88 kg |
Applications
This pilot routing makes sense on plants with their own pilot circuit or with back pressure in the tank channel. Both paths then stay decoupled from the main circuit. Symbol W8 defines the control edges and the centre position, and the amplifier electronics sit outside the valve.
Manufacturer
The manufacturer is Bosch Rexroth, material number R900978826, product family 4WRZ(E). Characteristic curves, step responses and installation dimensions are in data sheet RE 29115, RE 07600-B gives the range overview.
| Hersteller-Nr | R900978826 |
|---|---|
| Manufacturer | Bosch Rexroth |
| Country of Manufacture | Germany |
| Weight | 20.871000 |
| 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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