Trunnion Ball Valve (Top Entry)
● Top entry ball valve
Integral type valve body design, top entry pivot support. The ball is fitted into the valve body from the top, so repair, like replace of stem, ball, should be easy to finished in situ condition.
● Materials of parts
Parts No. | Parts Name | Materials | ||
Carbon Steel | Low Temp. Steel | Stainless Steel | ||
1 | Body | ASTM A216-WCB | ASTM A352-LCB/LCC | ASTM A351-CF8/CF8M |
2 | Bonnet | ASTM A216-WCB | ASTM A352-LCB/LCC | ASTM A351-CF8/CF8M |
3 | Nut | ASTM A194-2H/2HM | ASTM A194 4 | ASTM A194-2HM/8 |
4 | Bolt | ASTM A193-B7/B7M | ASTM A320 L7 | ASTM A193-B7M/B8 |
5 | Gasket | 304+PTFE | 304+PTFE | 304+PTFE |
6 | O-ring | VITON | VITON | VITON |
7 | Spring | INCONELX-750 | INCONELX-750 | INCONELX-750 |
8 | Seat ring | ASTM A105 | ASTM A182 F304/F316 | ASTM A182 F304/F316 |
9 | Seat insert | PTFE/PPL/PEEK/EPDM/VITON/DEVLON | ||
10 | Ball | ASTM A182-F6a | ASTM A182-F304 | ASTM A182 F304/F316 |
11 | Stem bearing | 304+PTFE | 304+PTFE | 304+PTFE |
● Main Standards:
Design standard | API 6D, BS 5351 |
Face to face | ASME B16.10 |
Flanged end | ASME B16.5, ANSI B 16.47 |
Butt-welded end | ASME B16.25 |
Anti-fire standard | API 607 |
Inspection standard | API 6D, API 598 |