john crane rubber bellow mechanical seal in pumps
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
john crane rubber bellow mechanical seal in pumps
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
john crane rubber bellow mechanical seal in pumps
1. Pressure: ≤0.8Mpa
2. Speed: ≤10m/s
3. Temperature: -20ºC~150ºC
Drawing of
john crane rubber bellow mechanical seal in pumps
Size of
john crane rubber bellow mechanical seal in pumps
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 |
john crane rubber bellow mechanical seal in pumps