We mainly supply pump mechanical seals,auto cooling pump seals,industrial pump seals,carbon face seal and ceramic face seal,etc.
Features of pump mechanical seal john crane
1.Model: type 21
2.Stationary Ring: ceramic/SIC/TC
3.Rotary Ring: carbon/SIC/TC
4.Secondary Seal: NBR/EPDM/VITON
5.Spring&Metal parts: steel
Drawing of pump mechanical seal john crane
Sizes of pump mechanical seal 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 |
pump mechanical seal john crane
