Bimetallic liner is a combination of hot forging high resistance to wear the coat and the advantages of high chromium cast iron wear-resistant corrosion inner sleeve, the outer sleeve is made of quality carbon steel hot-pressing time forming, sets of high chromium cast iron in centrifugal casting, the tensile strength of the outer sleeve more than 900000 psi, the inner sleeve after heat treatment, hardness greater than HRC62, can bear the pressure of 7000 psi, its surface smooth as a mirror, the inner hole size tolerance strictly, the normal service life of up to 800 hours
