Vibration eliminator
Also known as: vibration absorber, flexible connector
Short definitionA flexible section fitted between the compressor and the fixed pipework. Its stainless steel bellows absorbs the shaking, so the copper line does not fatigue and crack and no refrigerant leaks.
A compressor sitting on mounts shifts a few millimetres at every start and stop, while the pipe fixed to the frame does not move. The strain between them loads the brazed joints and produces a hairline crack within months. The flexible section takes that movement itself. Its build is simple: a thin stainless bellows, wire braid outside, copper stubs at the ends. On small hermetics a loop in the pipe is used instead of a separate part.
The diameter matches the line, and the pressure rating is chosen by refrigerant; R410A and CO₂ need the high-pressure type. It belongs right next to the compressor and must lie in line with the crankshaft, because the bellows can only flex sideways. A part fitted stretched or twisted becomes the first place to crack. It is wrapped in a wet cloth during brazing. On a sub-zero suction line it is insulated so water cannot get into the bellows and freeze.