Fonti industriali verificate
- Scheda tecnica per valvole industriali: API 608 and ISO 17292 cover industrial metal ball valves.
- Scheda tecnica per valvole industriali: Metal seating does not automatically mean zero leakage; the permitted leakage class must be stated in the procurement specification.
- Scheda tecnica per valvole industriali: Coating, hardfacing, hardness differential, particle size and maximum differential pressure affect service life and operating torque.