Proportional Directional Valve 4WRZE25W8-325-7X/6EG24N9K31/A1M - Bosch Rexroth R900707649

If working pressure drops below the minimum pilot pressure during the cycle, a pilot-operated valve can no longer position its main spool reliably. This version therefore takes pilot oil from a separate source through X, releases it through Y and controls 325 l/min from a plus/minus 10 V command.

Benefits

• External supply secures pilot pressure even in phases when the working circuit is close to pressureless.
• External drain Y additionally keeps the pilot stage clear of back pressure in the tank line.
• Nominal flow 325 l/min with spool symbol W8 at an operating pressure of up to 350 bar.
• Plus/minus 10 V command into on-board electronics, 24 VDC supply, 7-pole connector (6 + PE).
• Mass 20.2 kg, interface pattern ISO 4401-08-08-0-05, concealed auxiliary actuation.

Technical data

Applications

The layout belongs in plants with strongly varying system pressure, for example presses running on accumulators and test rigs with changing load profiles. Size the control circuit to the pilot pressure range given in the data sheet. Hydraulic fluid HL is intended.

Manufacturer

Bosch Rexroth builds this valve under material number R900707649. Quote that number when ordering and keep it in the spare parts list of the machine. Characteristic curves, installation dimensions and connection diagrams are in data sheet RE 29115 and RE 07600-B.