Rotary seal of PTFE - RA external sealing
Selection
Diameter DH9
| Diameter ø D H9 | Groove root ø d h9 | Groove width E+0,2 | O-Ring Cord thickness ø D1 | number of grooves |
| 8 - 39,9 | ø D - 4,9 | 2,2 | ø 1,78 | 0 |
| 40 - 79,9 | ø D - 7,5 | 3,2 | ø 2,62 | 0 |
| 80 - 132,9 | ø D - 11,0 | 4,2 | ø 3,53 | 1 |
| 133 - 329,9 | ø D - 15,5 | 6,3 | ø 5,33 | 2 |
| 330 - 669,9 | ø D - 21,0 | 8,1 | ø 7,00 | 2 |
| 670 - 999,9 | ø D - 28,0 | 9,5 | ø 8,50 | 2 |
Gap dimension "s" / radius "R"
| Groove width E+0,2 | Gap "s" 10 MPa | Gap "s" 20 MPa | Radius R |
| 2,2 | 0,15 | 0,10 | 0,3 - 0,5 |
| 3,2 | 0,20 | 0,20 | 0,5 - 0,7 |
| 4,2 | 0,25 | 0,20 | 0,8 - 1,0 |
| 6,3 | 0,30 | 0,25 | 1,2 - 1,5 |
| 8,1 | 0,30 | 0,25 | 1,5 - 2,0 |
| 9,5 | 0,40 | 0,30 | 2,0 - 2,8 |
All rotary seals are supplied as standard with an O-ring of NBR, 70 Shore. O-rings of special materials such as Viton must be separately specified!
Rotary seals / Ordering example: | Material | |
| RA - 80 x 69,0 x 4,2 - K Rotary seal external for outside diameter of ø 80 / PTFE-Carbon / Standard design RA - 80 x 64,5 x 6,3 - BR Rotary seal external for outside diameter of ø 80 / PTFE-Bronze / Special dimension and material | PTFE - Carbon | C BR GF |
In standard design the rotary seals will be supplied in material PTFE-Carbon, special groove dimension (up to 10 MPa are recommended) see in the above-mentioned table.
Directives
All information and values stated concerning our product portfolio are based on the knowledge optained through a long experience of manufacturing and application.
These figures are for indicative purposes only and may vary (exceed or deceed) according to the particular circumstances. Unknown factors in the applications and practice can considerably change the conditions and reduce and change statements, which may cause the above information to be invalid.
No liability can be accepted for any mistakes or omissions, error and subject to change without prior notice.
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Rotary sealing
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external sealing action
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