WABCO Retarder Proportional Valve 4722600200 Retarder Braking Control Valve for Heavy Duty Truck Hydraulic Retarder

The WABCO WABCO Retarder Proportional Valve (part number 4722600200) is a replacement component for the air brake and air suspension systems of heavy-duty trucks, buses and semi-trailers. It is built to original equipment specification from quality materials, so it installs on the original mounting points and performs reliably throughout the service life of the vehicle. Key ratings include Rated Voltage 24V, Max Working Pressure 12 bar, temperature range -40°C ~ +80°C, Protection Class IP6K9K.

Responding to the electronic command from the vehicle control unit, the valve varies air pressure smoothly to adjust retarder braking torque, giving stepless control on long descents. Sealed to IP6K9K with an automotive connector, it performs reliably in the heat, dust and vibration of heavy-duty operation.

Every unit is manufactured to original equipment specification and inspected before it leaves the factory, so it matches the fit, function and durability of the original part. Sealed, vibration-tested construction keeps performance stable in the heat, dust, road salt and constant vibration found on commercial vehicles, and standard interfaces make installation and maintenance straightforward. Spare parts, technical data and fitting advice are available on request.

• Rated voltage:24V: Max working pressure:12 bar, temperature range -40°C ~ +80°C.
• Protection Class IP6K9K: Electrical connector DIN‑bayonet.
• Receives Electric Control Signal From Vehicle ECU: Precisely regulates air pressure to control retarder braking torque.
• Realizes Stepless Adjustment of Retarder Braking Force: Matches Voith and FASIT hydraulic retarders.
• OE Original Quality: Stable performance under heavy vibration.

The valve is used on heavy trucks fitted with hydraulic retarders such as Voith and FASIT systems, including long-haul tractor units that work hilly routes. It provides the stepless, accurate control of retarder braking torque that protects service brakes and improves downhill safety.

Every unit is packed in a neutral export carton with foam protection so that ports, connectors and levers arrive free from damage. OEM cartons and private labels are available on request, and each carton is labelled with the part number for simple warehouse handling. All units are produced to original equipment specification and inspected before shipment; a twelve-month quality warranty and full technical support are provided, and mixed containers can be supplied for distributors and repair workshops. Please contact us for samples, volume discount pricing and confirmed lead times.