Vacuum pumps are used to create negative air pressure in an atmosphere or a vessel. They are used in a vacuum degassing system to draw off impurities from a ladle or vessel of molten metal by creating a vacuum above the metal pool. The vacuum created draws dissolved gases such as hydrogen, oxygen and nitrogen out of the molten steel. Vacuum pumps are also used in vacuum arc remelting furnaces for the same purpose while reducing the concentration of other elements with high vapor pressure such as carbon, sulfur, and magnesium. Vacuum pumps are used in a wide variety of non-steel related applications such as dewatering, vacuum lifting systems, container filling and filtering. Contact Casey Equipment for a quote on used vacuum pumps for sale.