The first of its kind
It was clear that only a metal-seated valve could work in such conditions. However, no such designs had existed before. After two years of development, the Neles® R&D team came out with a Neldisc™ valve that immediately proved to be an exceptional success. The U-shaped metal seat and elliptic disc formed a unique triple offset valve design, which are used in many butterfly valve products today. At that time, however, this was a first. Furthermore, the first deliveries at the end of 1975 exceeded all expectations.
New applications discovered throughout the years
In 1982, based on the proven design, a low-temperature cryogenic, high-performance butterfly valve was developed to expand into liquefied natural gas applications. And from there, many other possibilities for this product were discovered. For instance, butterfly valves are excellent for control applications, as there is no seat friction in the control range and the valve’s rangeability is surprisingly high.
Further doors opened with the realization that butterfly valves close much faster than other valves, such as ball valves, offering excellent performance in ESD and other on-off applications.
Designs based on customers’ needs
Today’s Neldisc™ family members are numerous and available in all major end designs. Many options exist for demanding applications that require high-cycling resistance, steam jacketing, erosion resistance and much more. Thanks to the flexible basic design concept, the valve’s functionality can easily be extended to cover new applications.
Metso’s butterfly valve offering is currently the most comprehensive in the entire valve industry. And many new success cases have been created based on actually customer requests.