Fonti industriali verificate
- Scheda tecnica per valvole industriali: API 608 covers flanged, threaded and welding-end metal ball valves.
- Scheda tecnica per valvole industriali: ISO 17292 applies to metal ball valves for petroleum, petrochemical, natural-gas and related industries.
- Scheda tecnica per valvole industriali: The supplier data sheet must confirm the available floating-ball sizes, pressure classes, seat materials and operating torque.