PTFE BELLOWS - GLASS TO GLASS

These bellows are used in installation of glass equipment for following purposes :
1. to provide safe branching of pipelines from the main glass equipment.
2. to accommodate odd degrees and variation in length.

Bellows are supplied alongwith 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".

Line bellows

These can withstand a temperature of 200 °C under normal atmospheric conditions.

Cat.Ref.
DN
D
D1
D2
L
 FBN1*
25
95
41
31
65
 FBN1.5*
40
105
56
43
65
 FBN2*
50
120
69
55
65
 FBN3*
80
155
98
82
65
 FBN4*
100
200
132
111
65
 FBN6*
150
275
184
162
65
 FBN9*
225
350
258
230
65
 FBN12
300
420
340
308
65
 
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 bellows can withstand a temperature of 200 °C under full vacum.

For size up to 50DN, line bellows can be used for these applications.

Cat.Ref.
DN
D
D1
D2
L
L1
t
 VB3*
80
155
98
82
70
5
3.0
 VB4*
100
200
132
111
70
5
3.5
 VB6*
150
275
184
162
70
5
4.0
 VB9*
225
350
253
230
70
5
4.5
 VB12
300
420
338
308
70
5
4.5

* marked items are available fast.