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After a cold start the oil is thick and an axis without feedback responds noticeably later. This 4WRTE with spool symbol E1 controls spool position internally and therefore stays predictable, at 220 l/min nominal flow and 350 bar. Pilot oil comes and goes externally.
Proportional Directional Valve 4WRTE25E1-220L-4X/6EG24K31/F1M - Bosch Rexroth R900979855
BOSCH REXROTH
Original product
Net price (excl. VAT)
€6,086.93
Item
BRR-R900979855
Manufacturer no.
R900979855
Personal expert advice
Brand new
Specialist dealer since 2009
Original product
Worldwide shipping
Product data
Manufacturer no.R900979855
Country of originGermany
ConditionNew
Artikel
BRR-R900979855
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Total price
After a cold start the oil is thick and an axis without position feedback responds later than it does when warm. This 4WRTE controls spool position internally and therefore stays predictable across the whole temperature range, at 220 l/min nominal flow and 350 bar.
Benefits
- Internal position control keeps the response largely independent of oil viscosity.
- 220 l/min nominal flow at 350 bar, maximum flow 870 l/min.
- External pilot supply and external return keep the pilot stage steadily fed.
- Linear characteristic with a 4...20 mA command, insensitive to long cable runs.
- 18.02 kg, ISO 4401-08-08-0-05 connection diagram, 24 VDC supply.
Technical data
| Connection diagram | ISO 4401-08-08-0-05 |
| Max. flow | 870 l/min |
| Product family | 4WRTE |
| Type of connection | Subplate mounting |
| Nominal flow | 220 l/min |
| Supply voltage | 24 VDC |
| Connectivity | Analog, command value 4...20 mA |
| 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 E1 |
| 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 | 18.02 kg |
Applications
The valve is used on plants with frequent standstills and cold starts, such as workshop presses, test equipment in shift operation and special machines. The on-board electronics sit directly on the valve and need no slot in the control cabinet. HL hydraulic fluid with NBR seals is used.
Manufacturer
Genuine Bosch Rexroth part, material number R900979855.
| Hersteller-Nr | R900979855 |
|---|---|
| Manufacturer | Bosch Rexroth |
| Country of Manufacture | Germany |
| Weight | 18.020000 |
| 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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