303.02.0049 4-circuit protection valve
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303.02.0049 4-circuit protection valve — KNORR-BREMSE

303.02.0049

Summary

●Port 1: M22x1,5 ●Port 21: M16x1,5 ●Port 22: M16x1,5 ●Port 23: M16x1,5 ●Port 24: M16x1,5 ●Operating Pressure: 13 BAR ●Opening Pressure 21/22/23/24: 7 BAR ●Closing Pressure 21/22/23/24: 5 BAR ●Max Pressure: 20 BAR. High-strength component for heavy commercial vehicle brake systems.

EAN Code8683457005280
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Description

The technical function of this 4-circuit protection valve is to manage and isolate air pressure within the pneumatic brake system, ensuring safety and stability in heavy commercial vehicles. Designed with high-strength components, this part provides reliable pressure regulation across four distinct circuits, maintaining optimal performance under demanding conditions.

303.02.0049 is the OE-equivalent of the KNORR-BREMSE AE 4643 4-circuit protection valve used in heavy commercial vehicle braking systems. This component is specifically engineered to meet the precise technical requirements of the KNORR-BREMSE hardware architecture, ensuring seamless integration and functional reliability.

The assembly features a specific port configuration: Port 1 utilizes M22x1,5 while Ports 21, 22, 23, and 24 utilize M16x1,5 threads. For workshop technicians, it is essential to verify that the operating pressure does not exceed the maximum limit of 20 BAR and that the opening pressure for all four circuits is set at exactly 7 BAR to maintain system integrity during maintenance and service intervals.

Technical Specifications

Port 1M22x1,5
Port 21M16x1,5
Port 22M16x1,5
Port 23M16x1,5
Port 24M16x1,5
Operating Pressure13 BAR
Opening Pressure 217 BAR
Opening Pressure 227 BAR
Opening Pressure 237 BAR
Opening Pressure 247 BAR
Closing Pressure 215 BAR
Closing Pressure 225 BAR
Closing Pressure 235 BAR
Closing Pressure 245 BAR
PressureMAX 20 BAR

Other OEMs

KNORR-BREMSE

  • AE 4643
  • AE4643

Related Products

Repair Kits

Vehicles Used

BrandModelEngine
KNORR-BREMSE

FAQ

What are the technical specifications for the ports on this part?
The component features Port 1 with M22x1,5 and Ports 21, 22, 23, and 24 with M16x1,5 thread sizes.
Which OEM numbers is this part compatible with?
This product is a direct replacement for the KNORR-BREMSE AE 4643 model.
What is the operating pressure for the four circuits?
The opening pressure for all four circuits (21, 22, 23, and 24) is set at 7 BAR.
What is the maximum pressure capacity of the valve?
The part is designed to handle a maximum pressure of up to 20 BAR within the braking system.
Is this part suitable for heavy commercial vehicles?
Yes, it is specifically designed for heavy commercial vehicle brake systems requiring high-strength components.