How Screw Pumps Handle Harsh Gases in Chemical and Pharmaceutical Industries
Vacuum technology is crucial in chemical and pharmaceutical industries, enhancing the safety, speed, and cost-effectiveness of various processes. Vacuum is indispensable in operations like conveying, distillation, drying, and concentration. For decades, liquid ring vacuum pumps and steam ejectors dominated these processes. However, these pumps have a major drawback: they rely on working fluids that come into contact with process gases, leading to contamination and operational inefficiencies. In contrast, dry screw vacuum pumps have become the preferred choice due to their ability to operate without any working fluid. Principle of Operation Dry screw vacuum pumps operate using two screw-shaped rotors that rotate in opposite directions. As the process gas is drawn in, it is sealed between the pump housing and the screws, then transported to the discharge port. During this process, the screws do not touch each other or the pump casing, thanks to precise manufacturing that maintains minima...