303.02.0044 4-circuit protection valve
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303.02.0044 KNORR-BREMSE 4-circuit protection valve

303.02.0044

Summary

The 303.02.0044 is a heavy-duty 4-circuit protection valve designed for critical brake system functions. It features a Port 1 of M22x1,5 and four M16x1,5 ports (21, 22, 23, 24) with specific opening and closing pressure thresholds to ensure optimal pneumatic stability in heavy commercial vehicles.

EAN Code8683457005235
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Description

The 303.02.0044 is a precision-engineered component designed to manage pneumatic pressure distribution within heavy commercial vehicle brake systems. This 4-circuit protection valve ensures that even during pressure fluctuations, the primary braking circuits remain stable and responsive, providing high-strength performance under demanding operating conditions.

303.02.0044 is the OE-equivalent of the KNORR-BREMSE AE 4616 4-circuit protection valve used in KNORR-BREMSE systems. This component is engineered to meet rigorous standards for reliability, ensuring full compatibility with the specified technical requirements of the braking architecture. It maintains an operating pressure of up to 12 BAR and supports a maximum pressure of 20 BAR.

Workshop technicians should note the specific port configurations: Port 1 utilizes an M22x1,5 thread, while Ports 21, 22, 23, and 24 use M16x1,5 threads. The device features precise opening pressures (6.8 BAR for ports 21, 22, and 24; 7 BAR for port 23) and consistent closing pressures of 5.5 BAR across all secondary circuits to ensure safe pneumatic transitions during service or maintenance.

Technical Specifications

Port 1M22x1,5
Port 21M16x1,5
Port 22M16x1,5
Port 23M16x1,5
Port 24M16x1,5
Operating Pressure12 BAR
Opening Pressure 216,8 BAR
Opening Pressure 226,8 BAR
Opening Pressure 237 BAR
Opening Pressure 246,8 BAR
Closing Pressure 215,5 BAR
Closing Pressure 225,5 BAR
Closing Pressure 235,5 BAR
Closing Pressure 245,5 BAR
PressureMAX 20 BAR

Other OEMs

KNORR-BREMSE

  • AE 4616
  • II36150
  • AE4616

Related Products

Repair Kits

Vehicles Used

BrandModelEngine
KNORR-BREMSE

FAQ

What are the compatible OEM numbers for this part?
This product is compatible with KNORR-BREMSE systems and serves as an OE equivalent for AE 4616 and II36150.
What is the thread size for the main port?
The main port (Port 1) features an M22x1,5 thread specification for secure installation.
Can this part be used in heavy commercial vehicles?
Yes, this is a professional-grade component designed specifically for heavy commercial vehicle brake systems.
What are the opening pressure settings for the ports?
Ports 21, 22, and 24 have an opening pressure of 6.8 BAR, while Port 23 is set at 7 BAR.
What is the maximum operating pressure?
The component is designed for an operating pressure of up to 12 BAR and can handle a maximum pressure of up to 20 BAR.