Pigment Manufacturer Solves Problem With Spherical Dome Valve
These solid materials are often used in the manufacturing process as fine powders. After their addition to the processing vessel, powerful high-speed dispersers are used to disperse the pigments into the vehicle. Obviously, the solids entry port must be closed securely or there would be splashing, and volatile materials could exit into the room. With multiple processing vessels this would not only create a hazardous situation, but also an unpleasant and dirty working environment that could lead to cross contamination.
Lockwood Greene was the engineer for a Degussa Huls America plant in Cincinnati, Ohio. The plant manufactures color-tinting concentrates. Lockwood Greene selected Roto-Disc® valves for this application. The simple internals allow for easy cleaning between batches. There is virtually no place for material to hide from the spray ball cleaning performed from below.