Proportional Directional Valve 4WRZE10W8-25-7X/6EG24N9ETK31/A1M - Bosch Rexroth R900787912

A micro feed on a grinding machine lives on fine resolution rather than flow. The 4WRZE10W8-25-7X/6EG24N9ETK31/A1M therefore limits itself to 25 l/min nominal flow through spool symbol W8, places pilot oil supply and return inside the valve and follows an analog ±10 V command value.

Benefits

• Nominal flow 25 l/min through spool symbol W8 for sensitive feed motion.
• Internal pilot oil supply and internal return, only four ports need piping.
• Version without pressure reducing valve, concealed auxiliary actuation on the pilot valve.
• Operating pressure up to 315 bar, maximum flow 170 l/min, size 10.
• Analog ±10 V command value, 24 VDC supply, weight 8 kg.

Applications

Grinding and honing machines, dressing axes and fine infeed drives need very small flows. Because the electronics sit in the valve, the control loop stays short. The subplate mounting follows connection diagram ISO 4401-05-05-0-05 of size 10.

Manufacturer

The manufacturer Bosch Rexroth uses material number R900787912. Datasheet RE 29115 lists characteristic curves, leakage figures and mounting dimensions of 4WRZE10W8-25-7X/6EG24N9ETK31/A1M, RE 07600-B the requirements on the fluid.