BTQ two-piece cast steel and STQ three-piece forged steel, side-entry trunnion configurations.
Sizes are organized from the company’s historical catalogues for preliminary selection. Current availability, pressure–temperature limits, materials and dimensions are subject to approved data sheets and drawings.
| Pressure class | Port designation | NPS (in) | Reference |
|---|---|---|---|
| BTQ / Class 150 | full | 2 · 3 · 4 · 6 · 8 · 10 · 12 · 14 · 16 · 18 · 20 · 22 · 24 | Catalogue pp. 21, 22 |
| BTQ / Class 300 | full | 2 · 3 · 4 · 6 · 8 · 10 · 12 · 14 · 16 · 18 · 20 · 22 · 24 | Catalogue pp. 21, 22 |
| BTQ / Class 600 | full | 2 · 3 · 4 · 6 · 8 · 10 · 12 · 14 · 16 · 18 · 20 · 24 | Catalogue pp. 23, 24 |
| BTQ / Class 900 | full | 2 · 3 · 4 · 6 · 8 · 10 · 12 · 14 · 16 · 18 · 20 · 24 | Catalogue pp. 23, 24 |
| STQ / Class 150 | full | 2 · 3 · 4 · 6 · 8 · 10 · 12 · 14 · 16 · 18 · 20 · 22 · 24 · 26 · 28 · 30 · 32 · 34 · 36 · 40 · 42 · 48 | Catalogue pp. 25, 26 |
| STQ / Class 300 | full | 2 · 3 · 4 · 6 · 8 · 10 · 12 · 14 · 16 · 18 · 20 · 22 · 24 · 26 · 28 · 30 · 32 · 34 · 36 · 40 · 42 · 48 | Catalogue pp. 27, 28 |
| STQ / Class 600 | full | 2 · 3 · 4 · 6 · 8 · 10 · 12 · 14 · 16 · 18 · 20 · 22 · 24 · 26 · 28 · 30 · 32 · 34 · 36 · 40 · 42 · 48 | Catalogue pp. 27, 28 |
| STQ / Class 1500 | full | 2 · 3 · 4 · 6 · 8 · 10 · 12 · 14 · 16 | Catalogue pp. 29, 30 |
Material options cannot be combined arbitrarily; review medium, temperature and sealing requirements together.
Include medium, design and operating pressures, temperature, quantity, ends and operation. Specify applicable acceptance criteria for fire testing, fugitive emissions or other special tests.
Drawings, dimensions, torque and inspection documents are reviewed for the selected construction. Design references in historical catalogues are not certification claims.
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