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303.02.0093 4-circuit protection valve, Brake System

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303.02.0093 Compatible 4-Circuit Protection Valve

303.02.0093

Summary

This 4-circuit protection valve is designed for heavy commercial vehicle brake systems. It features M22x1,5 and M16x1,5 port sizes with opening pressures of 7 BAR and closing pressures of 5 BAR. Compatible with Knorr-Bremse systems. Equivalent to OE Knorr-Bremse AE4416.

Product identifiers
EAN Code8683457009516
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Compatible OEM Codes

  • KNORR-BREMSE
    • AE 4416

Description

What does a 4-circuit protection valve do?

This 4-circuit protection valve plays a critical role in the pneumatic brake system of heavy commercial vehicles. It ensures the proper distribution of compressed air across multiple circuits, maintaining system pressure even if a single line experiences a leak. Built with high-strength components, this valve provides reliable performance under constant pressure fluctuations.

Vehicle and system compatibility

This component is designed for use in heavy commercial vehicle braking architectures. It is compatible with Knorr-Bremse systems and ensures precise air distribution throughout the pneumatic network. The valve operates with an opening pressure of 7 BAR and a closing pressure of 5 BAR for all secondary ports.

Installation and maintenance

For professional installation, technicians should verify all connection points. The primary port utilizes an M22x1,5 thread, while the four secondary ports feature M16x1,5 threads. Regular inspection of the seals and connection integrity is recommended to maintain optimal braking performance and system safety.

Troubleshooting and selection

When replacing an old unit, ensure the new valve meets the exact pressure requirements of the existing braking circuit to prevent premature system depressurization.

OE cross-reference

303.02.0093 (4-circuit protection valve) is the equivalent of the Knorr-Bremse OE number. This part directly replaces Knorr-Bremse OE number AE4416.

Technical Specifications

Technical Specifications
Port 1M22x1,5
Port 21M16x1,5
Port 22M16x1,5
Port 23M16x1,5
Port 24M16x1,5
Opening Pressure 217 BAR
Opening Pressure 227 BAR
Opening Pressure 237 BAR
Opening Pressure 247 BAR
Closing Pressure 215 BAR
Closing Pressure 225 BAR
Closing Pressure 235 BAR
Closing Pressure 245 BAR

Other OEMs

KNORR-BREMSE

  • AE4416
  • AE 4416

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
KNORR-BREMSE

FAQ

What is the function of a 4-circuit protection valve?
It divides the air supply into four separate circuits, ensuring that a leak in one circuit does not lead to a total loss of braking capability for the entire vehicle.
What are the port specifications for this valve?
The main inlet port uses an M22x1,5 thread, while the four output ports are equipped with M16x1,5 threads.
What are the operating pressure settings?
The valve is designed with an opening pressure of 7 BAR and a closing pressure of 5 BAR across its secondary ports.
Which brands is this component compatible with?
This component is compatible with Knorr-Bremse systems used in heavy commercial vehicle braking architectures.
What are the OE reference numbers of this part?
303.02.0093 directly replaces Knorr-Bremse OE number AE4416.