51 54122 0011 MAN TGS I Compressor Safety Valve

What does a compressor safety valve do?

This compressor safety valve acts as a critical protection component within the air brake system. It functions by using a calibrated spring mechanism to vent excess air, preventing over-pressurization of the compressor and the pneumatic circuit. Built with heavy-duty grade materials, it ensures reliable performance under high-pressure conditions.

Vehicle and engine compatibility

This component is specifically compatible with MAN TGS I trucks, including various models such as the 28.400, 33.390, and 41.440, as well as other configurations featuring the D2066 engine. It serves as a precise replacement for original components in these heavy commercial vehicle applications.

Installation and maintenance

The valve features an M26 port and is designed to operate effectively at 17 BAR. Technicians should ensure that the connection to the compressor housing is secure and that the seating surface is free of debris during installation to maintain an airtight seal.

System reliability

Regular inspection of the safety valve is recommended during routine air system maintenance to ensure the relief threshold remains within factory specifications.

OE cross-reference

7700 920 001 (Compressor Safety Valve) is the equivalent of the MAN OE number. This part directly replaces MAN OE number 51541220011.