| Technical Specifications | Product Scope |
|---|---|
| Size | DN50–DN1400 / NPS 2–56 |
| Pressure Class | Class 150–2500 |
| Design Standards | API 6D; API 594; ASME B16.34 |
| Structure | Swing disc / hinge-pin and rocker assembly |
| Operation | Automatic |
| Ends | Flanged / butt-weld / clamp |
| Body Materials | Carbon steel / alloy steel / stainless steel / nickel-based alloys / copper alloys |
The disc opens with forward flow and returns toward the seat as flow reverses; a body stop limits rocker travel.
Optional non-penetrating pin construction reduces potential external leakage points.
Cobalt-alloy hardfacing supports resistance to wear, corrosion and scuffing.
Graphite, spiral-wound, metal-ring and pressure-seal arrangements provide alternative sealing constructions within the family.
Reverse-flow prevention in gas and liquid line duties.
Automatic non-return protection in process piping.
Check-valve scope in packaged equipment and plant piping systems.
Material verification, shell-pressure testing and seat-leakage checks support the inspection scope.
Valve drawings, datasheets, material records and inspection reports support technical coordination.
