The Edwards DP, DPS and EDP series pumps offer a clean and robust pumping solution for the chemical and pharmaceutical industries. Using a unique, patented non contacting reverse claw mechanism, the DP, DPS EDP series pumps create an oil free vacuum, preventing contamination of the process stream. These pumps are highly tolerant to liquids and particles in the gas stream and can operate from atmosphere to ultimate pressure. In addition, an indirect cooling system prevents chemical reactions within the pump.