Much has already been written on the durability of pressure gauges, especially when subjected to vibration.
Vibration
What happens to a pressure gauge during its lifetime? What happens, particularly when it is subjected to vibration? Typical wear, accelerated by vibration, consists of the following:
* Worn out bearings.
* Broken adjustment U.
* Worn out segment shaft.
* Bourdon tube cracked at the top near the socket.
What is the best solution? Some manufacturers offer damped movements. In these designs, either the pinion shaft or the toothed segment (rack) is encased in a pot containing a viscous fluid. This provides the necessary damping forces to prevent or reduce movement damage. However, while the pointer is free of oscillation, the bourdon tube and connecting link are still subjected to severe vibration. As a result, the undamped parts wear very quickly.
In WIKA’s experience, the best solution is to fill the gauges. Aside from the obvious benefit of damping the amplitude of the oscillation both of the bourdon tube and the pointer, the filling fluid also lubricates the movement gear and the bearings.
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