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303.01.0031 Relay Valve, Brake System
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303.01.0031 Compatible Relay Valve for DAF and Iveco

303.01.0031

Summary

This heavy-duty relay valve is designed for compressed air brake systems, featuring M22x1.5 port sizes and a maximum operating pressure of 8 BAR. It ensures reliable pneumatic control for DAF, Iveco, and Nissan Ud Truck heavy commercial vehicles. Equivalent to OE DAF 1519314, Iveco 222692 and Nissan Ud Truck 069029470.

Product identifiers
EAN Code8683457009134
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Compatible OEM Codes

  • WABCO
    • 973 001 030 0
  • NISSAN UD TRUCK
    • 069029470
  • IVECO
    • 222692
  • DAF
    • 1519314

Description

What does a relay valve do?

This relay valve serves as a critical pneumatic control unit within the compressed air brake system of heavy commercial vehicles. By receiving control signals and feeding air directly from the nearest reservoir to the brake chambers, it minimizes air lag and ensures rapid response times during braking maneuvers.

Vehicle and engine compatibility

This component is engineered for high-performance compatibility with DAF, Iveco, and Nissan Ud Truck vehicles. It functions effectively within the pneumatic circuits of these heavy-duty applications to maintain consistent pressure regulation. The valve is also compatible with WABCO systems.

Installation and maintenance

Installation requires careful attention to the M22x1.5 port connections to ensure a secure, leak-free seal. Technicians should verify that the system pressure does not exceed the 8 BAR limit during testing to maintain optimal component longevity and braking performance.

Troubleshooting guidance

Monitoring the valve for air leaks or slow release speeds is essential for maintaining vehicle safety. Check the compatibility list to ensure correct fitment for your specific heavy commercial vehicle application.

OE cross-reference

303.01.0031 (Relay Valve Relay Valves) is the equivalent of the DAF, Iveco, Nissan Ud Truck and WABCO OE numbers. This part directly replaces DAF OE number 1519314. It also replaces Iveco OE number 222692, Nissan Ud Truck OE number 069029470 and WABCO OE number 9730010300.

Technical Specifications

Technical Specifications
Port 1M22x1,5
Port 2M22x1,5
Port 4M22x1,5
PressureMAX 8 BAR

Other OEMs

DAF

  • 1519314

IVECO

  • 222692

NISSAN UD TRUCK

  • 069029470

WABCO

  • 9730010300
  • 973 001 030 0

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
DAF
IVECO
NISSAN UD TRUCK
WABCO

FAQ

What is the function of this relay valve?
It acts as a pneumatic control unit that receives signals from the brake pedal to feed air directly to brake chambers, reducing response lag.
What are the technical port specifications?
The unit features M22x1.5 ports (Port 1, Port 2, and Port 4) and is designed for a maximum operating pressure of 8 BAR.
Which vehicle makes are compatible?
This part is compatible with DAF, Iveco, and Nissan Ud Truck heavy commercial vehicles, as well as WABCO systems.
When should I replace the relay valve?
Replacement may be necessary if you notice slow brake release speeds, air leaks from the ports, or inconsistent braking response.
What are the OE reference numbers of this part?
303.01.0031 directly replaces DAF OE number 1519314. It also replaces Iveco OE number 222692, Nissan Ud Truck OE number 069029470 and WABCO OE number 9730010300.