N.K. Engineering Co. Offers Aluminium Structure Sealing Machine with Acrylic Cabinet. N.K. Engineering Co. Is the manufacturer and exporter of machinery for the pharmaceutical industry. Aluminium Structure Sealing Machine with Acrylic Cabinet is made out of stainless steel. These machines are available with single motor synchronizes conveyor, star wheels and platform turret. A special clutch device is incorporated on the in-feed worm and star wheel system for stoppage of machine in the event; vial is over turned or over diameter.