Reversing valves for drill pipes
Function: to prevent shows of gas, oil, and water from the well through the drill pipe during drilling..
| Туре | Working pressure, MPa | Diameter (mm) | Height (mm) | Weight, kg |
| ƏКВ (КОБТ) - 80 | 15 | 80 | 240 | 7,0 |
| ƏКВ (КОБТ) - 89 | 15 | 89 | 260 | 7,4 |
| ƏКВ (КОБТ) - 95 | 15 | 95 | 260 | 8,5 |
| ƏКВ (КОБТ) - 108 | 15 | 108 | 280 | 12,0 |
| ƏКВ (КОБТ) - 120 | 15 | 120 | 290 | 12,5 |
| ƏКВ (КОБТ) - 133 | 15 | 133 | 310 | 16,8 |
