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Langfang Blue Water
International

Applications
The double flapper check valve with lock-out sleeve is used for specific needs under special processes in coiled tubing, and drop ball when required to perform as a downhole safety barrier.
Features
- The double-disc check valve is in a forced open state during the running-into-well process.
- When activation is required, a ball is dropped through the wellhead, and activation is achieved after pressure buildup.
- In the deactivated state, the valve disc is located in the sealed cavity and will not suffer any damage.
Sizes Availability
| Model Number | Tool OD (mm) | Tool ID (mm) | Thread Type |
| 305-380 | 38 | 10 | 1 AMMT B*P |
| 305-430 | 43 | 12 | 1 AMMT B*P |
| 305-450 | 45 | 12 | 1 AMMT B*P |
| 305-508 | 50.8 | 12 | 1-1/2 AMMT B*P |
| 305-540 | 54 | 18 | 1-1/2 AMMT B*P |
| 305-603 | 60.3 | 18 | 1-1/2 AMMT B*P |
| 305-635 | 63.5 | 18 | 1-1/2 AMMT B*P |
| 305-730 | 73 | 25 | 2-3/8 PAC B*P |
| 305-790 | 79 | 25 | 2-3/8 PAC B*P |