- Body joint
- Define bonnet thread or flange, bolt pattern, gasket profile and mating-body drawing.
- Stem passage
- Specify packing bore, stem clearance, guide geometry, datums and required alignment.
- Seal surfaces
- Provide flatness, finish, engagement and machining allowance requirements.
- Material and duty
- Identify the approved alloy and condition, design pressure/temperature and inspection criteria.
- Release records
- Define first-article approval, traceability, drawing-change control and responsibility for assembled-valve qualification.