Kelly Cock Valve
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The Kelly cock valve is installed in drilling rigs in order to prevent damage to the swivel, mud pump and other drill rig components from pressure buildups. Kelly cocks are to be installed at the upper and lower end of the Kelly.
Specifications| Upper Kelly Cock | ||||
| Type | O.D.(mm) | Thread connection (LH) | I.D.(mm) | Max.sealing pressure (Mpa) |
| CS 146 | 146 | 4 1/2 REG | 50 | 68.6 |
| CS 200 | 200 | 6 5/8 REG | 76.2 | 68.6 |
| Lower Kelly Cock | ||||
| Type | O.D.(mm) | Thread connection | I.D.(mm) | Max.sealing pressure (Mpa) |
| XS105 | 105 | NC31 | 41.3 | 68.6 |
| XS121 | 121 | NC38 | 50 | 68.6 |
| XS127 | 127 | NC38 | 50 | 68.6 |
| XS165 | 165 | NC46 | 61 | 68.6 |
| XS178 | 178 | NC50, 5 1/2FH | 71.4 | 68.6 |
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