Proportional Directional Valve 4WRZE16E180-7X/6EG24N9K31/A1D3M - Bosch Rexroth R901421642

Some machines run their main pump nearly unloaded for part of the cycle, yet the pilot valve still needs pilot pressure. That is why this size 16 valve has both pilot oil supply and pilot oil return routed externally, at 180 l/min nominal flow with a ±10 V command value.

Key benefits

• External pilot oil supply allows a separate control circuit at constant pressure, independent of the main pump.
• External pilot oil return keeps back pressure from the main gallery away from the pilot stage.
• 180 l/min nominal flow, 460 l/min maximum, 350 bar operating pressure.
• Spool symbol E with three switching positions and four ports, driven by an analog ±10 V signal.
• 12.56 kg, NBR seals, HL hydraulic fluid, ISO 4401-07-07-0-05 connection pattern.

Applications

This version makes sense on power units with a fixed pump for the control circuit and a variable pump for the working movement. It also keeps the pilot stage supplied in accumulator systems where system pressure swings widely. Both control ports must be connected during installation or the valve will not shift.

Manufacturer

Bosch Rexroth, material number R901421642, product family 4WRZ(E). The required pilot pressure range is stated in data sheet RE 29115, RE 07600-B lists the related series.