ZL 68D Mechanical Seals use hard materials such as silicon carbide (SiC) and graphite as sealing surface materials to improve wear resistance and corrosion resistance. At the same time, auxiliary sealing elements may use elastic materials such as NBR, EPDM, Viton, etc.
| PUMP ref | d(mm) | D1 | D3 | L1 | L2 |
| SR1 | 20 | 30 | 32.4 | 20 | 10.7 |
| SR2 | 30 | 41.3 | 44 | 21.4 | 10.9 |
| SR3 | 35 | 47 | 50.8 | 22 | 12.2 |
| SR4 | 45 | 58.3 | 62.4 | 22.9 | 11.6 |
| SR5 | 55 | 69.6 | 76 | 29.3 | 13 |
| SR6 | 75 | 92.2 | 99.2 | 31.1 | 14.5 |
