Proportional Directional Valve 4WRZE32W9-360-7X/6EG24N9TK31/A1D3M - Bosch Rexroth R900779406

What separates this unit from otherwise identical versions is the pilot oil routing: external supply, internal return. The pilot stage stays able to act even when axis working pressure drops below the minimum pilot pressure for part of the cycle. The valve is rated at 360 l/min nominal flow and 350 bar operating pressure.

Key benefits

• External pilot oil supply with internal pilot oil return, independent of axis working pressure
• 360 l/min nominal flow in size 32, flow ceiling 1600 l/min
• 350 bar maximum operating pressure, connection diagram ISO 4401-10-09-0-05
• Command value ±10 V at the on-board electronics, 24 VDC through a 7-pole connector (6 + PE) to EN 175201-804
• NBR seals for HL hydraulic fluid
• 44 kg weight, spool symbol W9 with 3 switching positions and 4 ports

Applications

The right pick wherever system pressure swings hard across the cycle, for example on presses with a rapid stroke and a pressing stroke, or on test rigs with changing load. A separate pilot pump or a branch upstream of the main pressure valve feeds the pilot stage. The pressure reducing valve in the pilot stage caps pilot pressure at the permitted level.

Manufacturer

Bosch Rexroth, material number R900779406, UKCA conformity to SI2016/1091 for electromagnetic compatibility. Further data is in data sheet RE 29115 for the pilot-operated proportional directional valve and in the overview RE 07600-B.