Welded bellows are metal bellows manufactured by connecting thin metal plates on precision discs while alternately welding the inner and outer diameters.
The bellows can be displaced axially, perpendicularly and angularly, with the internal and external pressures separated by welding.
We have a lineup of single bellows and welded bellows with conflat flanges on both ends.
All of them can be used under the following pressure, temperature, and specified life conditions.
Pressure Condition |
(Internal) Vacuum (External) Atmospheric pressure |
---|---|
Temperature Conditions | Normal temperature (max 250℃ during baking) |
Operating Conditions | Axial displacement only |
Amount Of Leak | 1×10-9 Pa・m3/s or less |
Material |
(Bellows) Equivalent to SUS316L/AM350 (Bellows single item only) (Flange) SUS304L |
Specified Life |
(Single bellows) 1, 10, 1,000,000 times (With conflat flange) 10,000 times |
* Only SUS316L is available for the 10,000 times single bellows specification.
If you have a specific request such as, please let us know the details of your specifications.
Please feel free to contact us as we will propose the optimal design for various uses.
Bellows materials are selected according to the environment in which they will be used, taking into consideration corrosion resistance, magnetism, and heat resistance.If there are no specific conditions to consider, we will consider materials that are more compact and less expensive within the specifications.
Contact between the bellows and the shaft prevents it from performing as it should.Normally a clearance of 2 mm per side is sufficient, but if the length is long enough to buckle, a large clearance is required.Regardless of the shaft inside, if there is concern about interference with structures around the bellows, please contact us for the appropriate clearance to take this into account.
Contact Bellows can be prematurely damaged by foreign bodies.Note that the horizontal position is significantly affected. Welded bellows have partial contact between the bellows folds, so dust emission is not zero, but does not affect service life.Formed bellows are more effective when the required displacement is small, as there are fewer parts in contact.
Please take a look at the technical information on bellows.
For document requests and inquiries,
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