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303.02.0086 4-circuit protection valve, Brake System
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303.02.0086 Compatible 4-Circuit Protection Valve

303.02.0086

Summary

This 4-circuit protection valve is designed for heavy commercial vehicle brake systems. It features M22x1.5 and M16x1.5 port configurations, with opening pressures ranging from 6.8 BAR to 7 BAR, ensuring reliable pneumatic circuit separation and safety. Equivalent to OE Knorr-Bremse AE4463.

Product identifiers
EAN Code8683457009455
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Compatible OEM Codes

  • KNORR-BREMSE
    • AE 4463

Description

What does a protection valve do?

This protection valve plays a critical role in the pneumatic braking system of heavy commercial vehicles by managing air pressure distribution across multiple circuits. By isolating different brake circuits, it prevents a single leak from causing a total loss of braking force, ensuring maximum safety for the vehicle and its cargo.

System compatibility and pressure specs

This component is compatible with Knorr-Bremse systems and is engineered to meet strict industrial standards for durability. It features specific pressure thresholds, including an opening pressure of 7 BAR for port 23 and 6.8 BAR for others, ensuring precise modulation of air supply.

Installation and maintenance guidance

For installation, technicians should verify that all ports—including the M22x1.5 and M16x1.5 connections—are properly seated to prevent pressure drops. Regular inspection of the valve during routine brake system maintenance is recommended to ensure optimal circuit separation and response times.

Safety and reliability

Check the compatibility list.

OE cross-reference

303.02.0086 (4-circuit protection valve) is the equivalent of the Knorr-Bremse OE number. This part directly replaces Knorr-Bremse OE number AE4463.

Technical Specifications

Technical Specifications
Port 1M22x1,5
Port 21M16x1,5
Port 22M16x1,5
Port 23M16x1,5
Port 24M16x1,5
Opening Pressure 216,8 BAR
Opening Pressure 226,8 BAR
Opening Pressure 237 BAR
Opening Pressure 246,8 BAR
Closing Pressure 216,6 BAR
Closing Pressure 226,6 BAR
Closing Pressure 236,8 BAR
Closing Pressure 246,6 BAR

Other OEMs

KNORR-BREMSE

  • AE4463
  • AE 4463

Related Products

Repair Kits

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
KNORR-BREMSE

FAQ

What is the primary function of this 4-circuit protection valve?
It manages the air pressure in multiple pneumatic circuits, isolating them to ensure that a leak in one circuit does not compromise the entire braking system.
What are the port specifications for this component?
The valve is equipped with one M22x1.5 port and multiple M16x1.5 ports to accommodate standard heavy commercial vehicle pneumatic lines.
How do the pressure thresholds work?
The valve operates with specific opening pressures, such as 7 BAR for port 23 and 6.8 BAR for other ports, to maintain stable pneumatic pressure across circuits.
Which systems is this valve compatible with?
This component is designed to be compatible with Knorr-Bremse systems used in heavy commercial vehicles.
What are the OE reference numbers of this part?
303.02.0086 directly replaces Knorr-Bremse OE number AE4463.