WABCO Anti-Compound Relay Valve 4730170010 Dual Function Air Brake Valve for Bus Air Brake System

The WABCO WABCO Anti-Compound Relay Valve (part number 4730170010) 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 Max Working Pressure 10 bar, temperature range -40°C ~ +80°C, Regulating Ratio 1 1, predominance pressure 1.0 bar.

By preventing the service brake and the parking brake from acting at the same time, the valve protects the brake mechanism from compound overload. It also supplies compressed air to the brake chambers quickly for a short response time, and its robust body keeps output stable in constant vibration.

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.

• Max Working pressure:10 Bar: Temperature range -40°C ~ +80°C.
• All Ports Thread M22*1.5: Mounting by 4 pcs M8 bolts.
• Regulating Ratio 1:1: Predominance pressure 1.0 bar.
• It Prevents Service Brake and Parking Brake: From acting at the same time (anti-compound function).
• Quickly Supplies Compressed Air to Brake Chambers: Fast brake response.
• OE Original Quality: Stable performance under vibration.

The valve is used on the air-brake systems of buses and heavy-duty trucks, including city buses and coaches. It is chosen to protect the brake mechanism from compound overload and to deliver compressed air to the brake chambers with a fast, stable response.

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.