SK type direct coupling water ring vacuum pump is used to suck air and other non corrosive, insoluble in water, does not contain solid particles in order to obtain a high vacuum in the airtight container. It is widely used in food, textile, chemical industry, medicine, metallurgy and electronic industry, vacuum evaporation, vacuum concentration, vacuum resurgence, vacuum impregnation, vacuum drying and vacuum smelting. It is widely used in food, textile, chemical industry, medicine, metallurgy and electronic industry, vacuum evaporation, vacuum concentration, vacuum resurgence, vacuum impregnation, vacuum drying and vacuum smelting.