Butterfly valves are characterised by a disc which can rotate on its own axis to cause closing and opening. They are cast iron, spherical-shaped components with epoxy varnish and stainless steel lens. They are mainly used in flanged connections and are ideal to be used in overheated water, wastewater or moderately aggressive liquids. The range of butterfly valves offered by Fitting Service includes LUG butterfly valves with pierced threaded valve.