303.02.0080 4-circuit protection valve
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303.02.0080 4-circuit protection valve — KNORR-BREMSE

303.02.0080

Summary

This 4-circuit protection valve features a high-strength design with Port 1: M22x1,5 and Ports 21-24: M16x1,5. It operates with an opening pressure of 7 BAR and a closing pressure of 4,5 BAR across all circuits, ensuring stable pneumatic control in heavy commercial vehicle brake systems.

EAN Code8683457009394
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Description

The pneumatic control of air brake systems requires precision and durability, which this 4-circuit protection valve provides through its heavy-duty grade materials and robust construction. It serves as a critical component in maintaining pressure distribution across multiple circuits within the braking system.

303.02.0080 is the OE-equivalent of the KNORR-BREMSE AE 4186 4-circuit protection valve used in heavy commercial vehicle brake systems. This part ensures precise pressure regulation, with an opening pressure of 7 BAR and a closing pressure of 4,5 BAR for all four circuits (Port 21, 22, 23, and 24).

For workshop technicians, this component features a standard Port 1 size of M22x1,5 and secondary ports of M16x1,5 to ensure seamless integration into existing pneumatic lines. Regular maintenance and inspection of the valve seals and pressure thresholds are recommended to maintain optimal braking performance and system safety.

This part is designed for professional installation in heavy commercial vehicle applications where reliable air circuit isolation is mandatory. The specific pressure thresholds are engineered to meet the demanding requirements of modern pneumatic braking architectures.

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

  • AE 4186
  • AE4186

Related Products

Repair Kits

Vehicles Used

BrandModelEngine
KNORR-BREMSE

FAQ

What are the specific pressure settings for this 4-circuit protection valve?
The valve features an opening pressure of 7 BAR and a closing pressure of 4,5 BAR for all four circuits (Ports 21, 22, 23, and 24).
Which OEM number is this part compatible with?
This product is a direct replacement/equivalent for the KNORR-BREMSE AE 4186 model.
What are the thread sizes for the ports?
The main port (Port 1) is M22x1,5, while the secondary ports (Port 21, 22, 23, and 24) are M16x1,5.
Is this part suitable for heavy commercial vehicles?
Yes, it is specifically designed for heavy commercial vehicle brake systems to ensure reliable pneumatic circuit protection.
Can this part be used in any braking system?
It is designed to be compatible with KNORR-BREMSE systems requiring the specific AE 4186 technical specifications.