Double Block And Bleed Ball Valves
DBB forged steel ball valve adopts double cutoff relief design to ensure safe isolation and pressure relief, conforms to API 6D/6A standard, and passes API 607/6FA fireproof certification. Suitable for high pressure, high temperature and dangerous media, widely used in petroleum, chemical and other fields.
- Size Range
- API 6D： NPS 1/2”~30” , API6A： NPS 1/2~12”
- Temperature Range
- Soft seal：-46~200℃ , Hard seal：-46~425℃
- Pressure Rating
- API 6D：CLASS150~2500, API 6A：2000PSI~10000PSI
- Operation Type
- Manual, electric, pneumatic
- Applications
- Water, oil, natural gas, etc.
Design specification:
| Design standard | API 6D, API 608, ASME B16.34, ISO 17292, API6A |
| Flange Application Range Connection Standard | ASME B16.5、ASME B16.47、MSS SP-44、EN1092.1、GOST33259、JIS B2220、API 6A |
| Butt-welding Connection Standard | ASME B16.25 |
| Socket-welding Connection Standard | ASME B16.11 |
| Threaded Connection Standard | ASME B1.20.1, ISO 228 |
| Fire Protection Requirements | API 607, API 6FA |
| Pressure Inspection and Testing | API 598, API 6D, ISO 5208, EN 12266, API 6A |
| Pressure and Temperature Ratings | ASME 16.34 |
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