Weijin Mechanical Seals Factory is specialized in production all types of pump kit machinery sealing elements and sealing auxiliary materials,such as pump mechanical seals,auto cooling pump seals,industrial pump mechanical seals and ceramic face seal,etc.The products are widely applied to machinery,chemical industry,pharmacy,auto industry and food,etc.
Features of elastomer bellow shaft seals john crane
1.Model: 21
2.Stationary ring: ceramic/SIC/TC
3.Rotary ring: carbon/SIC/TC
4.Secondary seal: NBR/EPDM/VITON
5.Spring&Metal Parts: steel
Working conditions of elastomer bellow shaft seals john crane
1.Pressure: ≤0.8Mpa
2.Speed: ≤10m/s
3.Temperature: -20ºC~150ºC
Drawing of elastomer bellow shaft seals john crane
Size of elastomer bellow shaft seals john crane
| Model | d | D | D1 | L1 | L2 |
| WJ21-1/2 " | 12.7 | 23.88 | 25.4 | 7.92 | 20.82 |
| WJ21-5/8 " | 15.875 | 26.7 | 31.75 | 10.29 | 22.43 |
| WJ21-3/4 " | 19.05 | 31.09 | 34.93 | 10.29 | 22.43 |
| WJ21-7/8 " | 22.225 | 33.4 | 38.1 | 10.29 | 24 |
| WJ21-1 " | 25.4 | 43.18 | 41.28 | 11.1 | 25.6 |
| WJ21-1 1/8 " | 28.575 | 46.28 | 44.45 | 11.1 | 27.17 |
| WJ21-1 1/4 " | 31.75 | 49.4 | 47.63 | 11.1 | 27.17 |
| WJ21-1 3/8 " | 34.925 | 52.58 | 50.8 | 11.1 | 28.78 |
| WJ21-1 1/2 " | 38.1 | 55.8 | 53.98 | 11.1 | 28.78 |
| WJ21-1 5/8 " | 41.275 | 62.2 | 60.33 | 12.7 | 35.13 |
| WJ21-1 3/4 " | 44.45 | 66 | 63.5 | 12.7 | 35.13 |
| WJ21-1 7/8 " | 47.625 | 66.6 | 66.68 | 12.7 | 38.3 |
| WJ21-2 " | 50.8 | 73 | 69.85 | 12.7 | 38.3 |
| WJ21-2 1/8 " | 53.9 | 73.3 | 76.2 | 14.27 | 43.05 |
| WJ21-2 1/4 " | 57.1 | 78.41 | 79.38 | 14.27 | 43.05 |
| WJ21-2 3/8 " | 60.3 | 82 | 82.55 | 14.27 | 46.25 |
| WJ21-2 1/2 " | 63.5 | 84.87 | 85.73 | 14.27 | 46.25 |
| WJ21-2 5/8 " | 66.6 | 88.4 | 85.73 | 15.9 | 49.4 |
| WJ21-2 3/4 " | 69.8 | 92.58 | 88.9 | 15.9 | 49.4 |
| WJ21-2 7/8 " | 73 | 94.85 | 95.25 | 15.9 | 52.57 |
| WJ21-3 " | 76.2 | 101.9 | 98.43 | 15.9 | 52.57 |
elastomer bellow shaft seals john crane
