Ang upuan na may dalawang PTFE gasket na disenyo na may L-shape na profile. Maaari itong ilagay sa Multiple-spring balanced seal. Materyal: V1.Q1.Q2
| d (pulgada) | D1 | D6 | D7 |
| 0.750 | 21.6 | 34.8 | 44.5 |
| 0.875 | 24.8 | 38 | 47.7 |
| 1.000 | 28 | 41.2 | 50.8 |
| 1.125 | 31.1 | 44.3 | 54 |
| 1.187 | 32.7 | 45.9 | 55.6 |
| 1.250 | 34.3 | 47.5 | 57.2 |
| 1.375 | 37.5 | 50.7 | 60.3 |
| 1.500 | 40.7 | 57 | 66.7 |
| 1.625 | 43.8 | 60.2 | 69.9 |
| 1.750 | 47 | 63.4 | 76.2 |
| 1.875 | 50.2 | 66.5 | 79.4 |
| 2.000 | 53.4 | 69.7 | 82.6 |
| 2.125 | 56.5 | 72.9 | 88.9 |
| 2.250 | 59.7 | 76.1 | 92.1 |
| 2.375 | 62.9 | 79.2 | 95.3 |
| 2.500 | 66 | 82.4 | 101.5 |
| 2.625 | 69.2 | 85.6 | 104.8 |
| 3.000 | 78 | 93.5 | 121 |
Nakaraan: Nakatigil na Upuan – 25 Susunod: T59B PTFE Wedge Mechanical Seal
