5 Popular Applications of Metal Bellow Seals

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5 Popular Applications of Metal Bellow Seals
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There are two types of metal bellow which is
formed and welded. Each of the types has their
own features and specialties. Let us see now look
at the different application bellows are used in.
. . . .
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• Valve Sealing

Metal Bellow Seals are used between the housing
and the rising stem to seal the inside part from
the outside world. In Europe, it is made to be
compulsory in order to prohibit any leakage.
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• Vacuum Interrupters

The transformers look huge and the amount of
electricity voltage it has is insane. So, for
switching of very high voltages sparks get
affected and thus, as a precautionary measure
oxygen has to be removed in the area where the
sparks occur. So, this is the time you need Metal
Bellow Seals to seal the spark area completely.
Bellows are used to seal such confined volumes,
so that the inside part of the bellow is
evacuated or filled with an inert gas as well
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• Mechanical Seals

In the mechanical industry, Bellow Seals are used
to close the inside of a pump from the outside
world to prevent leakage. There has to be a
sealing element consisting of a stationary and a
rotating ring while the pump shaft is turning.
Thus, the seal is mounted on the pump shaft. A
spring is also fitted to enforce sufficient
pressure on the two rings. The spring can also
have the form of a diaphragm (welded) bellow.
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• Load Cells

A load cell deforms when it is loaded with the
form of a pressure or a strain imposed on it.
This deformation is detected by a strain gauge
through which a low voltage direct current is
flowing. The fluctuation in voltage is detected
and made visible on a control panel. That is when
the bellow is mounted over the gauge to protect
it from outside influences.
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• Exhaust Bellows

In railways and many other industries, the engine
run constantly and causes self vibration. Thus,
to compensate for those movements and temperature
differences resulting in thermal expansion,
bellows are used to connect the exhaust gas pipes
to the funnel.
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