Directional Spool Valve 4WEH 16 W7X/6EG24N9ETK4/B12 - Bosch Rexroth R978901226

Size 16 to mounting pattern ISO 4401-07-07-0-05 is the starting point for the 4WEH 16 W7X/6EG24N9ETK4/B12. The pilot-operated spool valve carries up to 300 l/min at 280 bar maximum operating pressure and takes both pilot oil supply and pilot oil return internally, so no separate control line is needed. Spool symbol W occupies three switching positions across four ports, switched by a 24 VDC solenoid on a 3-pole connector (2 + PE) to EN 175301-803. With NBR seals the valve weighs 8.9 kg.

Benefits

• Size 16, mounting pattern ISO 4401-07-07-0-05, subplate mounting
• Flow up to 300 l/min at 280 bar maximum operating pressure
• Internal pilot supply, so no dedicated control oil line is required
• Spool symbol W with 3 switching positions across 4 ports
• 24 VDC solenoid, 3-pole connector (2 + PE) to EN 175301-803
• NBR seals, HL hydraulic fluid, weight 8.9 kg

Applications

Internal piloting draws the control oil from the main circuit, so that circuit has to hold enough pressure at all times for the pilot stage to switch reliably. The valve suits circuits in presses, hoists and machine tools running up to 300 l/min. Keep system pressure below 280 bar with pressure peaks during reversal counted in.

Manufacturer

The manufacturer is Bosch Rexroth, the material number is R978901226 from product family H-4W.H.. Two manufacturer documents are on file, switching times and performance limits are taken from the data sheet.