Proportional Directional Valve 4WRZE25W9-220-7X/6EG24N9ETK31/A1D3V - Bosch Rexroth R900774064

Building a control block without separate X and Y lines calls for a pilot-operated valve that routes its own pilot oil. The 4WRZE25W9-220 draws pilot supply internally and returns it internally, and controls 220 l/min nominal flow proportionally to a plus/minus 10 V command value.

Benefits

• Internal pilot oil supply and internal pilot oil return, no extra lines at the mounting block.
• 220 l/min nominal flow in size 25, up to 870 l/min maximum.
• Command value plus/minus 10 V into on-board electronics, 7-pole connector to EN 175201-804.
• 350 bar operating pressure with FKM seals, rated for hydraulic fluid HL.
• Pressure reducing valve in the pilot stage, plus concealed auxiliary actuation for commissioning.
• Connection diagram ISO 4401-08-08-0-05 at 20.76 kg.

Applications

The valve suits presses, injection moulding machines and test benches where a double-acting cylinder runs under speed or position control. Four ports and three switching positions cover the standard case. Internal pilot routing shortens the piping as long as the circuit keeps enough pressure available.

Manufacturer

Bosch Rexroth, material number R900774064, product family 4WRZ(E). Technical basis are data sheet RE 29115 for the pilot-operated proportional directional valve and RE 07600-B.