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Elastomer Bellow Seals R18
Replacement for:
Features:
- John crane type 21
Features:
- Single-Spring
- SS316 metal available
- Oversize available
Operating Limits of Elastomer Bellow Seals R18
- Temperature: -20℃ to 150℃, dependent on the elastomer
- Pressure: Up to 8 bar
- Speed: Up to 10 m/s
- End play/axial float allowance ±0.1mm
Sizes of Elastomer Bellow Seals R18
1/2” to 3”Materials Combination of Elastomer Bellow Seals R18
- Face: Carbon, SiC, TC
- Seat: Ceramic, SiC, TC
- Bellow: NBR, EPDM, VITON etc.
- Spring: SS304, SS316
- Metal parts: SS304, SS316
Specification of Elastomer Bellow Seals R18
| Elastomer Bellow Seals By Size | d | D | D1 | L1 | L2 |
| R18-1/2" | 12.7 | 23.88 | 25.4 | 7.92 | 20.82 |
| R18-5/8" | 15.875 | 26.7 | 31.75 | 10.29 | 22.43 |
| R18-3/4" | 19.05 | 31.09 | 34.93 | 10.29 | 22.43 |
| R18-7/8" | 22.225 | 33.4 | 38.1 | 10.29 | 24 |
| R18-1" | 25.4 | 43.18 | 41.28 | 11.1 | 25.6 |
| R18-1 1/8" | 28.575 | 46.28 | 44.45 | 11.1 | 27.17 |
| R18-1 1/4" | 31.75 | 49.4 | 47.63 | 11.1 | 27.17 |
| R18-1 3/8" | 34.925 | 52.58 | 50.8 | 11.1 | 28.78 |
| R18-1 1/2" | 38.1 | 55.8 | 53.98 | 11.1 | 28.78 |
| R18-1 5/8" | 41.275 | 62.2 | 60.33 | 12.7 | 35.15 |
| R18-1 3/4" | 44.45 | 66 | 63.5 | 12.7 | 35.15 |
| R18-1 7/8" | 47.625 | 66.6 | 66.68 | 12.7 | 38.3 |
| R18-2" | 50.8 | 73 | 69.85 | 12.7 | 38.3 |
| R18-2 1/8" | 53.9 | 73.3 | 76.2 | 14.27 | 43.05 |
| R18-2 1/4" | 57.1 | 78.41 | 79.38 | 14.27 | 43.05 |
| R18-2 3/8" | 60.3 | 82 | 82.55 | 14.27 | 46.25 |
| R18-2 1/2" | 63.5 | 84.87 | 85.73 | 14.27 | 46.25 |
| R18-2 5/8" | 66.6 | 88.4 | 85.73 | 15.9 | 49.4 |
| R18-2 3/4" | 69.8 | 92.58 | 88.9 | 15.9 | 49.4 |
| R18-2 7/8" | 73 | 94.85 | 95.25 | 15.9 | 52.57 |
| R18-3" | 76.2 | 101.9 | 98.43 | 15.9 | 52.57 |
Design Drawing of Elastomer Bellow Mechanical Seals R18
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