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The WABCO ABS Modulator Valve controls brake pressure during anti-lock braking events by regulating air delivery to each wheel circuit. When wheel slip is detected, the valve rapidly adjusts pressure to prevent lockup while maintaining braking force. This modulation happens in quick cycles as vehicle speed changes, helping maintain directional control. Electrical input triggers internal valve movement, while air pressure flows through designated ports. Rated for 12 V operation and capable of managing up to 11.0 bar, the WABCO 4725002250 manages brake pressure variation during ABS activation.
| Port thread 2.1 | 1/2 - 14 DRYSEAL NPTF |
| Voltage | 12 V |
| Max. operating pressure | 11.0 bar |
| Size | 320 x 170 x 174 |
| Temperature Range | -40°C to +80°C |
| Electrical connection | DIN 72585-A1-3.1-Sn/K1, DIN 72585-A1-2.1-Sn/K1 |
| Port thread 3 | Exhaust |
| Port thread 2 | 3/8 - 18 DRYSEAL NPTF |
| System | 4S/4M + (1M) 6S/4M |
| Response Pressure | 0.38 bar |
| Port thread 1 | 1/2 - 14 DRYSEAL NPTF |
| Protection class | IP66, IP69K |
| Weight | 3.9683 |
| Port thread 4 | 1/4" - 18 DRYSEAL NPTF |
| Calculated Volume (dm³) | 9.4656 |
| Brand | Part Number |
|---|---|
| FREIGHTLINER | TDAS4725002250, TDA-S472-500-225-0 |
| KENWORTH | S4725002250 |
| MACK | 8235-S4725002250, 6300-4725002250 |
| MERITOR | S4725002250 |
| NAVISTAR | S4725002250 |
| PETERBILT | S4725002250 |
| VOLVO | S4725002250, WAB4725002250 |
| WABCO | S4725002250 |
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Whether it’s for cars, buses, trucks, or trailers, WABCO® is at the frontline at developing and providing products and systems to make vehicles safer and easier to control. Founded in 1869, WABCO is a major supplier of braking, stability, suspension and transmissions in the Americas and beyond. The company is recognized as introducing the modern air brake system in 1869, and continues to lead the industry in air brake design and production for the heavy duty and commercial vehicle sectors. Today, WABCO operates as a division of the German auto parts maker ZF and employs 16,000 employees in facilities in 36 countries worldwide.
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