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Positioning a large differential cylinder usually fails on valve dynamics rather than on pump capacity. This size 25 4WRTE meters 350 l/min nominal flow at 350 bar and follows a ±10 V command value through on-board electronics with internal spool position feedback.
Proportional Directional Valve 4WRTE25W8-350L-4X/6EG24K31/A1M - Bosch Rexroth R900979380
BOSCH REXROTH
Original product
Net price (excl. VAT)
€6,767.36
Item
BRR-R900979380
Manufacturer no.
R900979380
Personal expert advice
Brand new
Specialist dealer since 2009
Original product
Worldwide shipping
Product data
Manufacturer no.R900979380
Country of originGermany
ConditionNew
Artikel
BRR-R900979380
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Driving a large differential cylinder to a target position needs flow and fast feedback of the spool position. This pilot-operated proportional directional valve in size 25 supplies 350 l/min nominal flow at 350 bar and runs on external pilot oil supply with external pilot oil return.
Benefits
- 350 l/min nominal flow at 350 bar operating pressure, size 25 admits peaks up to 870 l/min.
- Internal spool position feedback and on-board electronics remove the need for a separate amplifier card in the cabinet.
- ±10 V command value connects straight to common analog outputs of a controller or a closed-loop card.
- External pilot oil supply with external pilot oil return keeps the pilot stage clear of back pressure in the main circuit.
- Spool symbol W8, 3 switching positions across four ports, connection diagram ISO 4401-08-08-0-05.
- NBR seals for HL fluid, 17.96 kg installed weight.
Technical data
| Connection diagram | ISO 4401-08-08-0-05 |
| Maximum flow | 870 l/min |
| Product family | 4WRTE |
| Type of connection | Subplate mounting |
| Nominal flow | 350 l/min |
| Supply voltage | 24 V DC |
| Connectivity | Analog, command value ±10 V |
| Number of switching positions | 3 |
| Hydraulic fluid | HL |
| Number of ports | 4 |
| Electrical connection | 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 | 17.96 kg |
Applications
Used in forging and drawing presses, in large test cylinders and in extrusion presses where high flow has to be positioned accurately. The separate pilot supply suits plants with their own pilot circuit or with a strongly varying tank pressure. Mounting is on a subplate to ISO 4401-08-08-0-05.
Manufacturer
Bosch Rexroth, material number R900979380. Genuine series part from the manufacturer, not a replica. All values are taken from the manufacturer BMEcat.
| Weight | 17.960000 |
|---|---|
| Manufacturer | Bosch Rexroth |
| Hersteller-Nr | R900979380 |
| GPSR Herstellerdaten | Bosch Rexroth AG, Zum Eisengießer 1, DE-97816 Lohr am Main, www.boschrexroth.com |
| Artikelzustand | New |
| Artikel-Authentizität | Original product |
| Country of Manufacture | Germany |
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