Utilizing the latest computer aided design systems and software Solent & Pratt enables special design requirements, dimensions and specifications to be accommodated. The TOSV™ series valves are of dedicated Triple Offset * geometry design. This particular feature eliminates the disc-to-seat rubbing condition, normally associated with ‘HPBV’ butterfly valves, which induces wear of varying degrees, even in metal seated versions. This is an ideal replacement valve for Ball, Plug or Gate types Standard TOSV design features include zero leakage with bi-directional shut off to API 598, a field replaceable seat and seal ring for reduced maintenance costs, non-galling design to enable a wide variety of material options, with options for live loaded packing and arduous duty bearing protectors.