Three-piece Hard Seal Ball Valve
Performance Specification
| Pressure | Testing pressure at constant temperature (MPa) | Applicable temperature | Applicable medium
|
|||
| The shell t |
High-pressure seal | Low-pressure seal | ||||
| Nominal rating pr |
-29~121℃ |
Natural gas,liquefied gas,coal gas,oil,water, requirement |
||||
| Pressure classes(Class) | ||||||
Technical Specification
| Design reference | GB | API | ASME | |
| Design standard | GB/T12237 | API6D | ASME B16.34 | |
| Structural length | Flanged ends | GB/T12221 | API6D | ASME B16.10 |
| Welded connection | GB/T12221 | |||
| Flanged ends | GB/T9113JB/T79 | ASME B16.5 | ||
| Butt-welding ends | GB/T12224 | ASME B16.25 | ||
| Test &inspection | GB/T13927 JB/T9092 | API6D | API598 | |
Note:The sizes of valve connecting flange and butt-welding terminas can be designed according to customer's requirement.
Major Parts Material Form (hard Seal)
| No. | Accessory name | Material | |
| GB | ASTM | ||
| 1 | Body | WCB | A216-WCB |
| 2 | Packing | Graphite | Graphite |
| 3 | Seat | 0Cr19Ni10Ti+STL | A182-F304+STL |
| 4 | Ball | 0Cr19Ni10Ni9Ti+N | A182-F304+N |
| 5 | Stud | 35CrMoA | A193-B7 |
| 6 | Nut | 45 | A194-2H |
| 7 | Spring yoke | 06C19Ni10 | A182-F304 |
| 8 | Spring | InconelX-750 | Inconel X-750 |
| 9 | Bonnet | WCB | A216-WCB |
| 10 | Gasket | Graphite+1Cr18Ni9Ti | Graphite+304 |
| 11 | Gasket | 06C19Ni10 | A182-F304 |
| 12 | Packing | Graphite+1Cr18Ni9Ti | Graphite+304 |
| 13 | Stem | 06C 19N110 | A182-F304 |
| 14 | Packing gland | WCB | A216-WCB |
| 15 | Locating piece | Q235A | A36 |
| 16 | Wrench | WCB | A216-WCB |
| 17 | Ring | 65Mn | AISI1566 |
| 18 | Screw nail | 35CrMoA | A193-B7 |
Note: Major parts of the valve series and materials of sealing surface differ according to actual working condition and customer's special requirement.
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