Proportional Directional Valve 4WRZE25W8-220-7X/6EG24N9ETK31/F1D3M - Bosch Rexroth R900746375

Four channels in the plate is often all there is. The 4WRZE25W8-220-7X/6EG24N9ETK31/F1D3M therefore works with internal pilot oil supply and internal pilot return, releases 220 l/min rated flow and is driven by a 4 to 20 mA current command.

Benefits

• Pilot oil arrives internally, leaves internally, so the subplate only needs P, A, B, T.
• 220 l/min rated flow at 350 bar, while size 25 carries up to 870 l/min maximum flow.
• Current command 4 to 20 mA at the on-board electronics makes a broken signal wire detectable.
• Spool symbol W8, 3 switching positions, 4 ports, pilot stage with pressure reducing valve, concealed auxiliary actuation.
• Mounting pattern ISO 4401-08-08-0-05, NBR seals, HL fluid, 24 V DC on the 7-pole connector (6 + PE), 20.74 kg.

Applications

This layout pays off when retrofitting older blocks whose plate carries only the four main channels. It assumes a tank line without noticeable back pressure, because the pilot stage shares it. For plants with strongly varying return pressure the version with external pilot return is the better answer.

Manufacturer

Bosch Rexroth, material number R900746375. In the type code 4WRZE25W8-220-7X/6EG24N9ETK31/F1D3M the T marks the internal pilot return, ahead of it stand size 25, symbol W8, 220 l/min. Data sheet RE 29115 with overview RE 07600-B give curves plus accessories.