Suzhou Doctor Pump Co., Ltd is based in China and lists vacuum pumps on Global Trade Plaza. The pumps use water as a sealant and can handle air, steam, gas with high moisture content, and powder gas without granules. The pump casing is made of cast iron, the impeller of alloy copper, and the seal is a fluororubber mechanical seal. The interior of the pump casing and pump cover receives a Teflon coating. The equipment is described for low or rough vacuum degree and large capacity applications such as vacuum drying, concentration, evaporation, degassing, and distillation across medical, pharmaceutical, chemical, textile, power, food, metallurgical, and paper making industries.