The bi-metal cylinder liner is the most widely used and of the largest amount at fluid end of mud pumps. Bi-metal cylinder liner is composed with  a highly worn forged external liner which is made in high quality carbon steel through one-step hot press molding process, and a ware/corrosion-resisting high chromium-nickel internal liner which is made in high chromium cast iron through centrifugal casting process. The tension  strength of external liner is over 900000psi, while the hardness after heat treatment of internal liner is no less than HRC62 which can bear mud  pressure at 7000psi. The internal liner is with smooth surface with the inner-hole dimension tolerance strictly controlled, and its normal using life is over 800 hours. External liner: is forged in #45 steel, with tension strength σb>610MPa, yield strength σs>450MPa, percentage elongation §>17%, and hardness  HB180-200. Internal liner is made in high chromium cast iron through centrifugal casting process, with the annealing hardness HRC≤40m, and quenching hardness HRC60-67.

Zirconia liner 1.Liners combine the strength of a forged steel outer shell with the abrasion and corrosion reisistance of a high chromium iron inner sleeve. 2.Feature a centrifugally cast high chrome iron sleeve which is machined and heat treated to a minmum uniform bore hardness of HRC65 3. The surface of the liners with a mirror-like smooth finish and the inner holes' dimension tolerance is strictly controlled to ensure a long using life of more than 3000 hours. 4. Our liner made for superior performance under tough corrosive and abrasive conditions. We supply all common models of drilling rig mud pump liner in material zirconia ceramic and high chrome bimetal for Emsco, Gardner Denver, National, Oil well, Continental, Ideco, 3NB series mud pump and so on, ceramic liner inner sleeve material is 99.99% zirconia, high chrome bimetal liner is forgings , with chrome content 28%, HRC 65, next taking high-chrome liner for example.

Ceramic liner   1. Ceramic liner can be suitable for deeper oil reservoir, bad drilling geological structure environment, offshore oil and gas development. 2. The material of ceramic liners is the increased flexible zirconium ceramic.  3. It is wear resistance, high anti-corrosion, high temperature resistance, high pressure, high intensity and high hardness. The using time of liners is up to 6,000 hours. 4. Zirconium ceramic liners have better performance than alumina ceramic liners such as more toughness, longer service life, saving water lubrication, reducing wear of piston.

Ceramic liner   1. Ceramic liner can be suitable for deeper oil reservoir, bad drilling geological structure environment, offshore oil and gas development. 2. The material of ceramic liners is the increased flexible zirconium ceramic.  3. It is wear resistance, high anti-corrosion, high temperature resistance, high pressure, high intensity and high hardness. The using time of liners is up to 6,000 hours. 4. Zirconium ceramic liners have better performance than alumina ceramic liners such as more toughness, longer service life, saving water lubrication, reducing wear of piston.