The first Indian company which has been awarded the patent rights having unique design of PVDF lining over Polypropylene (PP) base material which has given the advantage of PVDF at the cost of PP. These valves have been replaced by costly solid PVDF valves not only in India but also worldwide. These valves have been well accepted in Europe, South East Asia and West Asia. Another feature of ‘Sando’ valves are metal insert injection moulding to avoid distortion bending of valve flanges during pipeline tightening.