SZ series water ring vacuum pump is used for vacuum, extraction of large volume process.SZ series water ring vacuum pump is mainly used to extraction of air and other non-corrosive, non-soluble in water, containing a small amount of solid particles of gas in order to form a vacuum sealed container. The absorption of gas mixed with a small amount of liquids allowed. SZ series water ring vacuum pump is widely used in machinery, pharmaceutical, food, petroleum and chemical industries.