Metal Bellows Expansion Joint is not a Vibration Isolator.
In applications where the possibility of vibrations – originating from rotary machines such as Pumps, blowers etc., Metal Expansion Joint shall be used with proper evaluation.
Metal Bellows can be used in applications where the Vibration is of low amplitude and high frequency.
The higher flow velocity results in turbulence and flow induced vibration; a properly designed internal sleeve to be used.
Metal Bellows will fail in cases, imposed with vibration of higher amplitude and low frequency such as originating from Reciprocating Machines.
It is important to furnish the Vibration Data such as amplitude and frequency of the system to the Bellows designer.
It should be ensured that frequency of system vibration do not coincide with Bellows Natural frequency.