SK series water ring vacuum pumps and. compressors are used to pump or compress air and other noncorrosive and water- insoluble gas not containing solid particles, so as to form up vacuum and pressure within closed container.But the gas sucked in allows a little mixture of liquid. SK water ring vacuum pumps and compressors are widely used in the fields of machinery, petrochemical, pharmaceuticals, foodstuff, sugar production and electronics. As in the process of operation, the compression of gas is isothermal, there is hardly any risk upon compressing and pumping explosive gas, making them more widely accepted.