Proportional Directional Valve 4WRZE32W8-520-7X/6EG24EK31/A1D3M - Bosch Rexroth R901041993

A separate pilot pressure supply means an extra pump, its own filter and more pipework in the power unit. The 4WRZE32W8-520-7X/6EG24EK31/A1D3M draws pilot pressure internally from the main circuit instead and needs only the drain externally, while providing 520 l/min nominal flow at 350 bar.

Key benefits

• Internal pilot supply - no dedicated pilot pressure source is needed because the main circuit feeds the pilot stage.
• External pilot drain - the pilot return goes to tank without pressure and stays free of main circuit return pressure.
• 520 l/min nominal flow, up to 1600 l/min by valve size - covers large piston areas.
• Command value ±10 V on a 24 VDC supply - on-board electronics wired through a 7-pole connector (6 + PE) to EN 175201-804.
• Spool symbol W8 on ISO 4401-10-09-0-05 - the standard hole pattern of size 32.
• 43.8 kg with NBR seals - hydraulic fluid HL, conformity UKCA SI2016/1091.

Applications

This version is the pragmatic choice for power units without a separate pilot circuit, for example on forming presses, hoists and test rigs. Keep in mind that the pilot stage only works once the main circuit carries pressure. The valve is pilot-operated and built as a spool valve with 4 ports and 3 switching positions.

Manufacturer

Made by Bosch Rexroth, material number R901041993. Minimum pilot pressure, curves and installation dimensions are stated in data sheet RE 29115, supplemented by RE 07600-B.