We make many small assemblies consisting of out manufactured parts, welded parts, hardware, “O” rings, oil seals, etc. For one of our customers from the Electrical switch gear sector they had a unique requirement that parts should be assembled in a dust free environment. For thisvery reason we have built a clean room which is completely sealed and has a double door entry with an air curtain between the doors. Parts entering the room are first cleaned in anultra-sonic cleaning machine and then are allowed into the room through a different sealed gate. The procedure for cleaning via the ultra-sonic cleaning machine is well mentioned and the people working there are well trained.