Fonti industriali verificate
- Scheda tecnica per valvole industriali: API 609 covers butterfly valves in multiple end configurations and categories.
- Scheda tecnica per valvole industriali: The supplier's design documents must confirm the triple-offset geometry, metal-seat construction and performance.
- Scheda tecnica per valvole industriali: High-temperature or severe isolation service requires confirmation of leakage class, fire-safety requirements and bidirectional differential pressure.