BackUp Rings

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If you need to prevent extrusion in Rubber O-Ring sealing systems, a PTFE Back-Up ring is the right solution.

Rubber O-Rings are generally used in dynamic and static hydraulic and pneumatic applications but tend to wear when subject to increasing temperatures and pressures.

The current fluid system technology combines moreand more high pressures with high temperatures.
A combination, which is a strong burden to Rubber O-Rings' physical and mechanical properties.
This explains why a PTFE Back-Up Ring is so important in preventing the O-Ring extrusion.

The PTFE Back-Up Ring improving solution
To put more emphasis on the role of PTFE Back-Up Rings, IPM offers a wide range of Virgin PTFE grade Back-Up Standard list (material according to standard AS8791A).
   PTFE Back-Up Ring Configurations
There are basic types of Back-Up Rings in use:
-Cut - MS28774
-Solid - MS27595

PTFE Back-Up Rings standard sizes

BackUp Ring
  
OD mm
ID mm
T mm
W mm

SOLID
  
 
CUT
 
 
6,00
3,80*
1,00
1,10
 
8,00
5,80*
1,00
1,10
 
10,00
7,80*
1,00
1,10
 
22,00
19,00*
1,40
1,50
 
22,00
19,40*
1,40
1,30
 
25,00
22,00*
1,40
1,50
 
25,00
22,40*
1,40
1,30
 
40,00
35,40*
1,40
2,30
 
40,00
36,00*
1,40
2,00
 
42,00
37,40*
1,40
2,30
 
42,00
38,00*
1,40
2,00
 
45,00
40,40*
1,40
2,30
 
45,00
41,00*
1,40
2,00
   

* static internal sealing
SOLID
  
 
CUT
 
6,20**
4,00
1,40
1,10
 
6,60**
4,00
1,40
1,30
 
7,20**
5,00
1,40
1,10
 
7,60**
5,00
1,40
1,30
 
8,20**
6,00
1,40
1,10
 
8,60**
6,00
1,40
1,30
 
10,60**
8,00
1,40
1,30
 
11,00**
8,00
1,40
1,50
 
12,60**
10,00
1,40
1,30
 
13,00**
10,00
1,40
1,50
 
14,60**
12,00
1,40
1,30
 
15,00**
12,00
1,40
1,50
 
16,60**
14,00
1,40
1,30
 
17,00**
14,00
1,40
1,50
 
17,60**
15,00
1,40
1,30
 
18,00**
15,00
1,40
1,50
 
18,60**
16,00
1,40
1,30
 
19,00**
16,00
1,40
1,50
 
20,60**
18,00
1,40
1,30
 
21,00**
18,00
1,40
1,50
 
22,60**
20,00
1,40
1,30
 
23,00**
20,00
1,40
1,50
 
26,00**
22,00
1,40
2,00
 
26,60**
22,00
1,40
2,30
 
29,00**
25,00
1,40
2,00
 
29,60**
25,00
1,40
2,30
 
32,00**
28,00
1,40
2,00
 
32,60**
28,00
1,40
2,30
 
34,00**
30,00
1,40
2,00
 
34,60**
30,00
1,40
2,30
 
36,00**
32,00
1,40
2,00
 
36,60**
32,00
1,40
2,30
 
39,00**
35,00
1,40
2,00
 
39,60**
35,00
1,40
2,30
 
40,00**
36,00
1,40
2,00
 
40,60**
36,00
1,40
2,30
 
45,40**
40,00
1,40
2,70
 
46,20**
40,00
1,70
3,10
 
47,40**
42,00
1,40
2,70
 
48,20**
42,00
1,70
3,10
 
50,40**
45,00
1,40
2,70
 
51,20**
45,00
1,70
3,10
 
53,40**
48,00
1,40
2,70
 
54,20**
48,00
1,70
3,10
 
55,40**
50,00
1,40
2,70
 
56,20**
50,00
1,70
3,10
 
57,40**
52,00
1,40
2,70
 
58,20**
52,00
1,70
3,10
 
60,40**
55,00
1,40
2,70
 
61,20**
55,00
1,70
3,10
 
61,40**
56,00
1,40
2,70
 
62,20**
56,00
1,70
3,10
   

** static external sealing
     
alt

*any other size not included in these lists can be custom made on demand.
 
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