Proportional Directional Valve 4WRZE32W8-520-7X/6EG24N9K31/A1M - Bosch Rexroth R901156185

A dedicated pilot circuit is the most dependable way to shift a large directional valve. This size 32 variant is fully externally connected for that purpose and passes 520 l/min nominal flow at up to 350 bar.

Key benefits

• External pilot oil supply and external pilot oil return, independent of the state of the working circuit
• 520 l/min nominal flow on mounting pattern ISO 4401-10-09-0-05 with 4 ports
• Command value ±10 V into the on-board electronics, 24 V DC through the 7-pole connector
• Operating pressure up to 350 bar, flow reserve up to 1600 l/min
• Spool symbol W8, 3 switching positions, concealed manual override, 43.34 kg

Applications

Common in steel plants, forges and large test rigs where a pilot pressure unit already exists. Both pilot lines have to be routed, in exchange the shifting behaviour stays independent of load pressure. On an emergency stop the valve only falls back once the pilot circuit is depressurised too.

Manufacturer

Bosch Rexroth lists this unit under material number R901156185. Characteristic curves and installation dimensions are given in datasheet RE 29115, the series overview in document RE 07600-B.