Cost-efficient valve design

Metso has strengthened its product offering with the addition of a valve design derived from their traditional V-port segment valve series. The two-way-tight, single-seat design is suitable for a wide range of applications and is available for R-series valves. The optional two-way-tight feature covers the size range from DN25 up to DN700 (1” up to 28”) in all available pressure classes. With our V-port segment valve series, we are able to improve process performance and reduce variability in control applications. However, there are a lot of applications where two-way-tight, on-off type performance is required. The customer benefit of the new V-port segment valve design is that it offers the possibility of combining control and on/off performance in a single valve assembly. The standard bi-directional shut-off classifications of the V-port segment valves are according to 10x ISO Rate D / FCI 70.2 Class IV; optional improved tightness classes are ISO Rate D / FCI 70.2 Class V @ dp 20 bar. One of Metso’s paper mill customers installed a DN 600 RE flanged, V-port segment valve in a steam discharge application. In this particular case, low-pressure, superheated steam flows through the two-way-tight valve at 200 deg C. A traditional valve solution for this application would have been a two-way-tight ball valve. However, by selecting the new two-way-tight, V-port segment valve, the customer was able to save 50% on his capital costs. In pulp mills there are many applications where two-way tightness is required. For example, there are many such valves next to batch– and continuous digesters. In the bleaching department, the on-off valve after the chemical mixer is typically quite large and can require the two-way tightness feature. The two-way-tight option is available for both RA and RE valve series for all standard pressure classes and flange drillings. It is also available in all standard body materials.