Welded
Diaphragm Metal Bellows
Senior
Aerospace Metal Bellows is the largest manufacturer of edge welded
metal bellows, bellows assemblies and related bellows products in the
United States.
Welded
Metal Bellows Description
Two
contoured diaphragms – each constructed from thin stainless
steel – are welded at the inside diameter to form a
convolution. Capsules are formed when convolutions are stacked on a
horizontal arbor and welded at the outside diameter.
Welded
Metal Bellows Features
-
Wide
range of operating temperatures
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Constant
effective area with change in pressure
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Excellent
spring and pressure deflection characteristics
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Ability
to withstand high pressure
-
Long
stroke per unit length
-
Short
nestled length
-
Corrosion
resistance
-
Leak
tightness to less than 1×10-¹ºscc/sec He
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Welded
Metal Bellows Configurations |
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Nesting
Ripple
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Flat Plate
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Crescent/Single Sweep
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Good
stroke capability
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Compact
nested length
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Good
linearity
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Good
pressure capability
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HIPRES®
Proprietary
configuration used in Senior Aerospace HIPRES® maintenance free accumulators. This bellows configuration allows for
the very high differential pressure that the bellows will experience
in the nested condition. |
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Welded
Metal Bellows Materials
Welded
metal bellows materials include:
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374
stainless steel
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AM-350
stainless steel
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Inconel
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Titanium
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Haynes
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Hastelloy
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Welded
Metal Bellows Cycle Life
Depending
on the application requirements, the service life can range
anywhere between 5,000 cycles to infinity. Reduced stroke and
additional capsules increase bellows life. |
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Welded
Metal Bellows Applications
Welded
metal bellows are ideal for:
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High
vacuum seals
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Leak-free
motion feedthroughs
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Flexible
joints and seals
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Volume
compensators
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Maintenance
free accumulators
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Tanks
and Reservoirs
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Pneumatic
and hydraulic actuators
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Pressure
and temperature sensors
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Vacuum
Pumps and Compressors
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Various
bellows assemblies
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