The PTFE expansion bellows is a layer of PTFE material added to the inside of the ordinary bellows to protect the internal corrugated structure and prevent corrosion damage to the bellows through the medium.
1,High pressure resistance
2,High temperature resistance
3,Acid and alkali resistance
4,Oil resistance
5,Wear resistance
6,Corrosion resistance
1,Protect the corrugation from being damaged by the medium with high corrosion concentration.
2,The medium conveyed by PTFE bellows is strong acid, strong alkali, high salt and alkali.
![](http://sc04.alicdn.com/kf/H36fae9efba784804baa744e3f092abe8p/273335395/H36fae9efba784804baa744e3f092abe8p.jpg)
Connection datas of bellow expansion joints
|
||||||||
Nominal diameter (mm)
|
Quantity of ripple
|
Pressure level
|
Effective area of corrugated tube(cm2)
|
Maximum
external diameter (mm) |
||||
0.25
|
0.6
|
1.0
|
1.6
|
2.5
|
||||
Axial compensation
(mm) |
Stiffness
(N/mm) |
Axial compensation
(mm) |
Length(mm)
|
Toughness
(N/mm) |
||||
32
|
8
|
25/21
|
22/26
|
20/26
|
18/63
|
16
|
225
|
|
32
|
16
|
50/11
|
46/14
|
41/14
|
36/32
|
16
|
225
|
|
40
|
8
|
25/28
|
22/44
|
20/44
|
18/89
|
15/98
|
23
|
244
|
40
|
16
|
50/14
|
46/22
|
41/22
|
36/45
|
31/47
|
23
|
244
|
50
|
8
|
25/30
|
22/51
|
20/70
|
18/70
|
15/106
|
37
|
259
|
50
|
16
|
50/16
|
46/26
|
41/35
|
36/35
|
31/55
|
37
|
259
|
65
|
8
|
33/28
|
30/35
|
26/44
|
22/55
|
15/138
|
55
|
270
|
65
|
12
|
42/16
|
38/22
|
38/32
|
34/40
|
31/70
|
55
|
270
|
80
|
8
|
40/20
|
36/26
|
34/33
|
28/41
|
19/68
|
81
|
284
|
80
|
10
|
53/14
|
49/17
|
49/21
|
43/26
|
29/50
|
81
|
284
|
100
|
6
|
45/47
|
45/60
|
40/75
|
35/93
|
25/54
|
121
|
304
|
100
|
10
|
76/26
|
74/32
|
64/40
|
57/50
|
38/33
|
121
|
304
|
125
|
5
|
48/38
|
42/47
|
38/59
|
34/74
|
29/117
|
180
|
334
|
125
|
9
|
85/23
|
77/29
|
66/36
|
58/45
|
49/63
|
180
|
334
|
150
|
5
|
49/42
|
44/50
|
40/62
|
34/78
|
29/92
|
257
|
364
|
150
|
8
|
79/34
|
71/43
|
64/51
|
54/59
|
50/56
|
257
|
364
|
200
|
4
|
52/49
|
46/55
|
42/68
|
38/78
|
29/97
|
479
|
442
|
200
|
6
|
73/31
|
65/44
|
59/52
|
53/58
|
46/65
|
479
|
442
|
250
|
4
|
72/30
|
65/34
|
59/42
|
52/45
|
34/111
|
769
|
507
|
250
|
6
|
108/16
|
97/21
|
87/35
|
79/39
|
48/78
|
769
|
507
|
300
|
4
|
72/51
|
65/55
|
59/59
|
52/65
|
47/55
|
1105
|
562
|
300
|
6
|
108/32
|
97/35
|
87/37
|
79/41
|
71/47
|
1105
|
562
|
350
|
4
|
72/58
|
65/62
|
59/67
|
52/74
|
47/71
|
1307
|
622
|
350
|
6
|
108/38
|
87/41
|
87/44
|
79/48
|
71/45
|
1307
|
622
|
400
|
4
|
72/54
|
65/68
|
59/62
|
52/68
|
47/81
|
1611
|
700
|
400
|
6
|
108/36
|
97/39
|
87/43
|
79/47
|
71/47
|
1611
|
700
|
450
|
4
|
108/32
|
97/35
|
87/37
|
79/41
|
47/75
|
1972
|
760
|
450
|
6
|
162/20
|
145/22
|
131/23
|
118/25
|
71/52
|
1972
|
760
|
500
|
4
|
108/59
|
97/64
|
87/68
|
79/75
|
71/45
|
2445
|
835
|
500
|
6
|
162/34
|
145/37
|
131/39
|
118/43
|
106/28
|
2445
|
835
|
600
|
4
|
108/74
|
97/80
|
87/85
|
79/94
|
71/82
|
3534
|
980
|
600
|
6
|
162/42
|
145/45
|
131/49
|
118/53
|
106/48
|
3534
|
980
|
700
|
4
|
108/67
|
97/72
|
87/77
|
79/85
|
71/103
|
4717
|
1110
|
700
|
6
|
162/42
|
145/45
|
131/49
|
118/53
|
106/60
|
4717
|
1110
|
800
|
4
|
120/88
|
108/95
|
102/102
|
94/112
|
71/95
|
5822
|
1265
|
800
|
6
|
183/67
|
164/72
|
156/77
|
144/85
|
106/60
|
5822
|
1265
|
900
|
4
|
120/84
|
108/90
|
102/97
|
94/107
|
82/123
|
7620
|
1186
|
900
|
6
|
183/60
|
164/65
|
156/69
|
144/76
|
125/93
|
7620
|
1186
|
1000
|
4
|
120/91
|
108/98
|
102/105
|
94/116
|
82/117
|
9043
|
1286
|
1000
|
6
|
183/59
|
164/65
|
156/71
|
144/81
|
125/84
|
9043
|
1286
|