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Langfang Blue Water
International

Applications
The dart type check valve is a standard coiled tubing string component. It provides a means that prevent the back flow of well fluids into the coiled tubing.
Features
- Dual dart sealing system adopted to provide a reliable sealing performance.
- Conical metal sealing provides a better gas sealing performance.
- The sealing dart has a guiding system which ensures to reset the spring.
Sizes Availability
| Model Number | Tool OD (mm) | Tool ID (mm) | Thread Type |
| 303-380 | 38 | / | 1 AMMT B*P |
| 303-430 | 43 | / | 1 AMMT B*P |
| 303-450 | 45 | / | 1 AMMT B*P |
| 303-508 | 50.8 | / | 1-1/2 AMMT B*P |
| 303-540 | 54 | / | 1-1/2 AMMT B*P |
| 303-603 | 60.3 | / | 1-1/2 AMMT B*P |
| 303-635 | 63.5 | / | 1-1/2 AMMT B*P |
| 303-730 | 73 | / | 2-3/8 PAC B*P |
| 303-790 | 79 | / | 2-3/8 PAC B*P |