Profile: G J Johnson & Sons Ltd. specializes in supplying valves, fittings and related products into the marine, process, manufacturing and water industries. The valves we supply include air operated valves, ball valves, boiler valves and check valves. Butterfly valves are widely used in water distribution and waste water processing. It can come in two body types, lugged or wafer. Wafer style valves are more common. They are typically installed between two flanges using bolts or studs and nuts. Lug style valves are also installed between two flanges but with a separate set of bolts for each flange. The lugged style setup makes it possible to remove one side of the piping while the other remains intact. Stainless steel wafer pattern valve features stainless steel body and disc with PTFE liner makes this valve an ideal solution for a wide variety of applications.