UK-based Oliver Twinsafe has developed the Semi solid and severe service valve (S4V) for polymer plants. The polymerisation process is abrasive by nature with media constantly solidifying and liquefying inside the valve which, in turn, is subject to a tremendous amount of wear on both the ball and the seats. The Oliver Twinsafe Semi and solid severe service valve builds on the company’s existing Hybrid Trunnion mounted ball valve design by incorporating tungsten carbide coated ball and seat sets capable of withstanding the abrasion and high pressures associated with the polymerisation process. In addition, the S4V also utilises cavity filters which prevent grit getting behind the ball and galling the seat. The advanced new valve is available in sizes ranging from 1in to 12in.
