303.02.0034 4-circuit protection valve
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303.02.0034 4-circuit protection valve — WABCO

303.02.0034

Summary

The 303.02.0034 is a high-strength 4-circuit protection valve designed for heavy commercial vehicle brake systems. It features specific port configurations including Port 1 (M22x1,5) and multiple M16x1,5 ports, ensuring precise pressure regulation for DAF, VOLVO, and WABCO systems.

EAN Code8699031096315
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Description

This high-strength component serves as a critical element within the pneumatic brake system, specifically designed to manage and protect air circuits in heavy commercial vehicles. The valve ensures the stability of air pressure across multiple circuits, providing essential safety and reliability during operation in demanding environments.

303.02.0034 is the OE-equivalent 4-circuit protection valve used in DAF and VOLVO heavy commercial vehicles, and it is also compatible with WABCO systems such as 934 714 140 0 and 934 714 740 0. This part meets the technical requirements for vehicle makes including PACCAR and provides seamless integration with existing braking hardware.

The technical specifications include a primary Port 1 of M22x1,5 and secondary ports (12, 21, 22, 11, 23, 24) utilizing M16x1,5 threads. The device operates with specific opening pressures of 6,3 BAR for ports 21 and 22, and 5,8 BAR for ports 23 and 24, with a maximum pressure capability of up to 13 BAR.

Workshop technicians should ensure precise assembly to maintain optimal pneumatic performance. Regular inspection of the port connections and pressure thresholds is recommended during routine service intervals to prevent system leaks or pressure drops in the heavy commercial vehicle braking network.

Technical Specifications

Port 1M22x1,5
Port 12M16x1,5
Port 21M16x1,5
Port 22M16x1,5
Port 11M16x1,5
Port 23M16x1,5
Port 24M16x1,5
Opening Pressure 216,3 BAR
Opening Pressure 226,3 BAR
Opening Pressure 235,8 BAR
Opening Pressure 245,8 BAR
Closing Pressure 234 BAR
Closing Pressure 244,5 BAR
PressureMAX 13 BAR

Other OEMs

DAF

  • 1528375

VOLVO

  • 20382309
  • 20452151
  • 20716313
  • 20755195
  • 21225479

WABCO

  • 934 714 140 0
  • 934 714 740 0
  • 934.714.740.0
  • 9347141400
  • 9347147400

Related Products

Repair Kits

Vehicles Used

BrandModelEngine
DAF
PACCAR
VOLVO
WABCO

FAQ

What are the compatible OEM numbers for this protection valve?
This part is compatible with DAF (1528375), VOLVO (20382309, 20452151, 20716313, 20755195, 21225479), and WABCO (934 714 140 0, 934 714 740 0).
Which vehicle makes does this part fit?
The component is designed for heavy commercial vehicles from DAF, VOLVO, and PACCAR, as well as WABCO braking systems.
What are the thread sizes for the ports?
The main port (Port 1) uses M22x1,5 threading, while the auxiliary ports (Port 12, 21, 22, 11, 23, and 24) use M16x1,5 threading.
What are the operating pressure thresholds?
The valve features opening pressures of 6,3 BAR (Ports 21/22) and 5,8 BAR (Ports 23/24), supporting a maximum pressure of up to 13 BAR.
Is this part suitable for heavy commercial vehicle brake systems?
Yes, it is a high-strength component specifically engineered for the pneumatic circuits of heavy trucks and buses.