Rising stem ball valves (RSBV) were created to address the needs for tight sealing and the resistance to abrasive particles over a wide temperature range. From Hot Oil Applications, Hydrogen, Sour Gas Service, and Molecular Sieve switching, the range of applications is expanding – but so is the competition.
For Robert McIlvaine of the McIlvaine Company’s full article: http://www.valve-world-americas.com/pdf/201706_22-23.pdf