303.02.0086 4-circuit protection valve
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303.02.0086 KNORR-BREMSE 4-circuit protection valve

303.02.0086

Summary

●Port 1: M22x1,5 ●Port 21: M16x1,5 ●Port 22: M16x1,5 ●Port 23: M16x1,5 ●Port 24: M16x1,5 ●Opening Pressure 21: 6,8 BAR ●Opening Pressure 22: 6,8 BAR ●Opening Pressure 23: 7 BAR ●Opening Pressure 24: 6,8 BAR ●Closing Pressure 21: 6,6 BAR ●Closing Pressure 22: 6,6 BAR ●Closing Pressure 23: 6,8 BAR ●Closing Pressure 24: 6,6 BAR

EAN Code8683457009455
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Description

The heavy duty protection valve is a critical component within the pneumatic brake system of heavy commercial vehicles, ensuring stable pressure distribution across multiple circuits. This part is engineered with high-strength components to maintain precise pressure regulation and reliability under demanding operational conditions.

303.02.0086 is the OE-equivalent of the KNORR-BREMSE AE 4463 4-circuit protection valve used in KNORR-BREMSE systems. This component is designed to meet strict technical requirements for heavy commercial vehicle brake systems, providing essential circuit isolation and pressure management.

For workshop technicians, this valve features specific port dimensions including a primary Port 1 of M22x1,5 and secondary ports (21 through even) of M16x1,5. Proper installation requires verifying the opening and closing pressure thresholds—specifically the 7 BAR threshold for circuit 23—to ensure optimal system safety and performance during routine maintenance.

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

  • AE 4463
  • AE4463

Related Products

Repair Kits

Vehicles Used

BrandModelEngine
KNORR-BREMSE

FAQ

What are the specific port sizes for this protection valve?
The unit features one M22x1,5 port (Port 1) and four M16x1,5 ports (Ports 21, 22, 23, and 24) for precise connectivity.
Which OEM part numbers is this component compatible with?
This product is a direct replacement for the KNORR-BREMSE AE 4463 model.
What is the opening pressure for circuit 23?
While most circuits operate at 6,8 BAR, circuit 23 has a specific opening pressure of 7 BAR.
Is this part suitable for heavy commercial vehicle brake systems?
Yes, it is designed specifically for heavy commercial vehicle pneumatic brake systems requiring high-strength components.
What are the closing pressure specifications for the ports?
The closing pressure for ports 21, 22, and 24 is typically 6,6 BAR, while port 23 is rated at 6,8 BAR.