Welded bellows are metal bellows manufactured by joining thin metal plates on precision disks while alternately welding their inner and outer diameters.
Bellows can be displaced in the axial direction, the axis perpendicular direction, and the angular direction with the pressure inside and outside cut off by welding.
Features
- IRIE KOKEN’s welded bellows are compact and offer superior expansion/contraction, and long lifetime designs are also available.
- Expansion/contraction properties and spring characteristics can be set by changing the inner/outer diameter dimensions and plate thickness.
- Users can weld Y-type end fittings.
- These bellows are highly pressure-resistant.
Technical information
What are bellows?
About bellows materials --- Explanation of AM350 equivalent and other representative materials used for welded bellows
How to use bellows (1・2)
--- Design precautions and handling precautions
Glossary of bellows terms
Standard welded bellows
Our lineup includes discrete bellows and welded bellows with a conflat flange at both ends.
All can be used under the following pressure, temperature, and specific life conditions..
Standard welded bellows selection procedures
Standard product estimate request form
<Standard specifications>
Pressure conditions |
(Internal) vacuum (External) atmospheric pressure |
Temperature conditions |
Ordinary temperature (baking temp. max. 250°C) |
Operating conditions |
Axial displacement only |
Leak rate |
1×10-9 Pa・m3/s or less |
Materials |
(Bellows) SUS316L or AM350 equivalent (discrete bellows only) (Flange) SUS304L |
Specific life conditions |
(Discrete bellows) 10,000, 100,000, or 1,000,000 repetitions (with conflat flanges) 10,000 repetitions |
* Bellows having 10,000 repetitions spec: SUS316L only
- Bellows
- These specifications apply to welded
bellows only, which can be used:
- - When fittings are welded by the user, or
- - When user-supplied fittings are welded by us.
- Product details
- Bellows with conflat flanges
- These welded bellows include a CF
- flange at both ends.
- The CF flange type can be selected.
- Fixation at both ends or fixation-rotation.
- Product details
Customized products
Even when standard products do not meet your specifications, we will make considerations on an individual basis. Please let us know your detailed specifications, when you have specific needs such as:
- A more compact design is desired,
- Allowance for displacements in other directions than the axial direction is desired, or
- use for pressurization is also desired.
We will make recommendations adopting optimum designs for various applications. Please feel free to consult us.
User specification product estimate request form