303.02.0092 4-circuit protection valve
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303.02.0092 4-circuit protection valve — KNORR-BREMSE

303.02.0092

Summary

●Port 1: M22x1,5 ●Port 21: M16x1,5 ●Port 22: M16x1,5 ●Port 23: M16x1,5 ●Port 24: M16x1,5 ●Opening Pressure 21: 7 BAR ●Opening Pressure 22: 7 BAR ●Opening Pressure 23: 7 BAR ●Opening Pressure 24: 7 BAR ●Closing Pressure 21: 4,5 BAR ●Closing Pressure 22: 4,5 BAR ●Closing Pressure 23: 4,5 BAR ●Closing Pressure 24: 4,5 BAR

EAN Code8683457009615
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Compatible OEM Codes

  • KNORR-BREMSE AE 4412

Description

The heavy duty grade materials used in this component ensure consistent pneumatic performance within the braking system. This part functions as a critical protection valve, managing air pressure distribution across multiple circuits to maintain safety and system integrity during heavy commercial vehicle operation.

303.02.0092 is the OE equivalent of the KNORR-BREMSE AE 4412 4-circuit protection valve used in the brake system. This component is designed for high-reliability applications where precise pressure thresholds are required for safety-critical pneumatic operations.

Technical specifications include a primary Port 1 size of M22x1,5 and four auxiliary ports (Port 21 through Port 24) sized at M16x1,5. The device is engineered with a standardized opening pressure of 7 BAR and a closing pressure of 4,5 BAR across all four circuits to ensure stable circuit isolation during pressure drops.

Workshop technicians should ensure all connections are secure and compatible with the specified M-series thread profiles to prevent leaks. Regular inspection of the valve's opening and closing thresholds is recommended to maintain optimal pneumatic circuit-protection standards in heavy commercial vehicle fleets.

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 214,5 BAR
Closing Pressure 224,5 BAR
Closing Pressure 234,5 BAR
Closing Pressure 244,5 BAR

Other OEMs

KNORR-BREMSE

  • AE4412
  • AE 4412

Vehicles Used

BrandModelEngine
KNORR-BREMSE

FAQ

What are the compatible OEM codes for this part?
This product is a direct replacement for the KNORR-BREMSE AE 4412 model.
What are the thread sizes for the ports?
The main port (Port 1) is M22x1,5 and the four auxiliary ports (Ports 21-24) are M16x1,5.
What is the opening pressure for each circuit?
All four circuits (Port 21, 22, 23, and 24) have a standardized opening pressure of 7 BAR.
What is the closing pressure threshold?
The valve maintains a closing pressure of 4,5 BAR for all four output ports.
Is this part suitable for heavy commercial vehicles?
Yes, this is a professional-grade component designed specifically for heavy commercial vehicle brake systems.