Directional Spool Valve H-4WEH25D6X/6EG24NSK4/B10 - Bosch Rexroth R900618351

Very large oil volumes call for a correspondingly large spool cross section and a pilot circuit of their own. This size 25 valve switches up to 700 l/min across two positions to symbol D and draws its pilot oil externally.

Benefits

• Rated flow of 700 l/min through the subplate interface ISO 4401-08-08-0-05
• Operating pressure of up to 350 bar across all four ports
• External pilot oil supply and external pilot oil return, which keeps pilot pressure independent of the load pressure in the main channel
• Two switching positions to symbol D, pilot control on 24 VDC through a 3-pole connector to EN 175301-803
• NBR seals and a mass of 18.6 kg, so lifting gear has to be planned for installation

Applications

The valve controls large cylinders in presses, forging lines and hydraulic engineering. The external pilot circuit allows reliable switching even when main pressure varies strongly during the cycle. HL serves as the hydraulic fluid.

Manufacturer

The Bosch Rexroth H-4W.H.. series covers the large sizes. The Bosch Rexroth material number is R900618351. Characteristic curves and installation dimensions are given in data sheet RE 24751, with RE 07600-B as a supplement.