These bellows are used in installation of glass equipment for following
purposes:
- to provide safe branching of pipelines from the main glass equipment.
- to accommodate odd degrees and variation in length.
Bellows are supplied along with required bellow flanges and
nut-bolts. Distance locking bolts are provided to avoid excessive
compression or contraction of the bellow. Gaskets are not required
where bellows are used. For drilling details, refer "Bellow
flanges".
Vacuum bellows
For pipelines of 80DN and above operating under vacuum, the bellows
are provided with an internal sleeve which supports the convolutions
without affecting the flexibility of the bellow. These can withstand
a temperature of 200°C under full vacuum.
For size up to 50DN, line bellows can be used for these applications.
| Cat. Ref. | DN | D | D1 | D2 | L | L1 | t |
| VB3* VB4* VB6* VB9* VB12 |
80 100 150 225 300 |
155 200 275 350 420 |
98 132 184 253 338 |
82 111 162 230 308 |
70 70 70 70 70 |
5 5 5 5 5 |
3.0 3.5 4.0 5.0 5.0 |
* marked items are available fast.
