303.02.0102 4-circuit protection valve
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303.02.0102 4-circuit protection valve — WABCO

303.02.0102

Summary

●Port 1: M22x1,5 ●Port 21: M16x1,5 ●Port 22: M16x1,5 ●Port 23: M16x1,5 ●Port 24: M16x1,5 ●Opening Pressure 21: 8 BAR ●Opening Pressure 22: 8 BAR ●Closing Pressure 21: 5 BAR ●Closing Pressure 22: 5 BAR ●Closing Pressure 23: 5 BAR ●Closing Pressure 24: 5 BAR ●Opening Pressure 23: 8,5 BAR ●Opening Pressure 24: 8 BAR

EAN Code8683457009608
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Description

This precision-engineered component serves as a critical element within the pneumatic brake system of heavy commercial vehicles. As a specialized 4-circuit protection valve, it ensures the stable distribution of air pressure across multiple circuits, maintaining system integrity during operation. Designed with heavy-duty grade materials, it provides reliable pressure regulation and protects the primary air supply from downstream fluctuations.

303.02.0102 is the OE-equivalent of the WABCO 934 714 126 0 4-circuit protection valve used in ALEXANDER DENNIS, DAF, and PACCAR systems. This part meets strict technical requirements to ensure seamless integration with compatible pneumatic hardware and maintains high-strength performance under demanding conditions.

For workshop technicians, this component features specific port configurations including a primary M22x1,5 inlet and four M16x1,5 outlets. The technical specifications include an opening pressure of 8 BAR for ports 21 and 22, and an opening pressure of 8.5 BAR for port 23. Regular inspection of the connection points and pressure thresholds is recommended during routine brake system maintenance to ensure optimal safety and performance.

Technical Specifications

Port 1M22x1,5
Port 21M16x1,5
Port 22M16x1,5
Port 23M16x1,5
Port 24M16x1,5
Opening Pressure 218 BAR
Opening Pressure 228 BAR
Closing Pressure 215 BAR
Closing Pressure 225 BAR
Closing Pressure 235 BAR
Closing Pressure 245 BAR
Opening Pressure 238,5 BAR
Opening Pressure 248 BAR

Other OEMs

ALEXANDER DENNIS

DAF

WABCO

Vehicles Used

BrandModelEngine
ALEXANDER DENNIS
DAF
PACCAR
WABCO

FAQ

Which vehicles is this protection valve compatible with?
This part is compatible with systems from ALEXANDER DENNIS, DAF, PACCAR, and WABCO (specifically code 934 714 126 0).
What are the technical port specifications for this unit?
The unit features one M22x1,5 port (Port 1) and four M16x1,5 ports (Ports 21, 22, 23, and 24).
What are the opening pressure thresholds for the circuits?
The opening pressures are set at 8 BAR for Port 21 and Port 22, and at 8.5 BAR for Port 23.
Can this part be used as an OE replacement for WABCO?
Yes, this product is a direct equivalent for WABCO code 934 714 126 0 and ALEXANDER DENNIS code 657367.
Is this component suitable for heavy commercial vehicle braking systems?
Yes, it is designed specifically for the pneumatic brake systems of heavy commercial vehicles such as trucks and buses.