Proportional Directional Valve 4WRZ32W8-520-7X/6EG24N9EK4/D3M - Bosch Rexroth R900747493

When several hundred litres per minute flow back, the tank gallery builds noticeable counter pressure. The 4WRZ32W8-520-7X/6EG24N9EK4/D3M separates the pilot oil return from it and meters a 520 l/min nominal flow.

Advantages

• External pilot oil return through Y, independent of counter pressure in the return line.
• Internal pilot oil supply from P, no additional pressure line needed.
• Nominal flow of 520 l/min, up to 1600 l/min total, operating pressure up to 350 bar.
• Pressure reducing valve in the pilot stage for constant pilot pressure.
• Spool symbol W8, three switching positions, ISO 4401-10-09-0-05, concealed manual override.
• Weight of 43.7 kg, NBR seals, external amplifier electronics on 24 VDC.

Technical data

Applications

The valve is intended for large axes with high return volume, for instance on drawing presses and metallurgical plants. A separate return stabilises the pilot stage when filters and coolers sit in the return. Port Y has to be provided on the manifold.

Manufacturer

Bosch Rexroth, material number R900747493. Product family 4WRZ(E). Further details are given in data sheet RE 29115 on the pilot-operated proportional directional valve and in the overview RE 07600-B.