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303.02.0004 Multi-circuit Protection Valve, Brake System

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303.02.0004 Multi-circuit Protection Valve for DAF

303.02.0004

Summary

This multi-circuit protection valve is engineered for heavy commercial vehicle braking systems. It features M22x1.5 and M12x1.5 port configurations, ensuring precise pressure regulation with opening pressures of 7.5 BAR and 9 BAR to maintain braking safety across various circuits. Equivalent to OE Alexander Dennis ABA0034316206S, DAF 1519210S and Mercedes-Benz 0034316206S.

Product identifiers
EAN Code8699031084268
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Compatible OEM Codes

  • WABCO
    • 934 705 005 0 S
    • 934 705 003 0 S
  • VDL
    • 20266299 S
  • MERCEDES BENZ
    • 003 431 62 06 S
  • DAF
    • 1519210 S
  • ALEXANDER DENNIS
    • ABA0034316206 S

Description

What does a multi-circuit protection valve do?

This multi-circuit protection valve serves as a critical component within the pneumatic brake system, designed to isolate different braking circuits in the event of a leak. By managing pressure distribution, it ensures that a failure in one circuit does not compromise the entire vehicle's stopping capability. The component is manufactured using high-strength components to withstand the rigorous demands of heavy commercial vehicle operation.

Vehicle and system compatibility

This part is compatible with DAF, Mercedes-Benz, VDL, and Alexander Dennis vehicles. It is specifically engineered to meet the requirements of heavy commercial vehicle braking architectures, ensuring reliable performance in various driving conditions. The design allows for precise control over pneumatic distribution across the vehicle's chassis.

Installation and technical specifications

For proper installation, technicians should verify all port connections, including the M22x1.5 and M12x1.5 threads. It is essential to check that the opening pressures—specifically 7.5 BAR for ports 23/24 and 9 BAR for ports 21/22—align with the specific vehicle system requirements to ensure optimal braking performance and safety.

Maintenance and troubleshooting

Regular inspection of the valve seals and pressure regulation accuracy can prevent system failures. Maintaining this component helps ensure stable braking pressure throughout the service life of the vehicle's pneumatic system.

OE cross-reference

303.02.0004 (Multi-circuit Protection Valve) is the equivalent of the Alexander Dennis, DAF, Mercedes-Benz, VDL and WABCO OE numbers. This part directly replaces Alexander Dennis OE number ABA0034316206S. It also replaces DAF OE number 1519210S, Mercedes-Benz OE number 0034316206S, VDL OE number 20266299S and WABCO OE numbers 9347050030S, 9347050050S.

Technical Specifications

Technical Specifications
Port 1M22x1,5
Port 21M22x1,5
Port 22M22x1,5
Port 23M22x1,5
Port 24M22x1,5
Port 25M22x1,5
Port 26M22x1,5
Port 27M12x1,5
Port 28M12x1,5
Opening Pressure 23/247,5 BAR
Closing Pressure 21/227 BAR
Closing Pressure 23/244,5 BAR
Opening Pressure 21/229 BAR

Other OEMs

ALEXANDER DENNIS

  • ABA0034316206 S

DAF

  • 1519210 S

MERCEDES BENZ

  • A0034316206S
  • A0034316206 S
  • A00034316206S
  • 003 431 62 06 S

VDL

  • 20266299 S

WABCO

  • 9347050050S
  • 9347050030S
  • 934 705 005 0 S
  • 934 705 003 0 S

Related Products

Repair Kits

Used In

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
ALEXANDER DENNIS
DAF
MERCEDES BENZ
VDL
WABCO

FAQ

What is the function of a multi-circuit protection valve?
It isolates individual braking circuits during a pressure loss, ensuring that the remaining circuits continue to provide sufficient braking force for the vehicle.
Which vehicles are compatible with this part?
This component is designed for heavy commercial vehicles from makers such as DAF, Mercedes-Benz, VDL, and Alexander Dennis.
What are the technical port specifications?
The valve features multiple ports including M22x1.5 and M12x1.5 threading to accommodate standard pneumatic brake line connections.
How can I identify if a replacement is needed?
Technicians should look for symptoms of pressure loss in specific circuits or irregular braking behavior that suggests a failure in circuit isolation.
What are the OE reference numbers of this part?
303.02.0004 directly replaces Alexander Dennis OE number ABA0034316206S. It also replaces DAF OE number 1519210S, Mercedes-Benz OE number 0034316206S, VDL OE number 20266299S and WABCO OE numbers 9347050030S, 9347050050S.