Cylinder liner

A replaceable cylindrical insert mounted in the block of water-cooled reciprocating heat engines. Cylinder Liners are made of cast iron and are used in cylinder blocks to reduce the wear on friction surfaces and to facilitate repair. The Cylinder Liner determines the displacement of the cylinder in which the piston is housed. The bore surface of a Cylinder Liner is carefully honed, and the water space of the liner is cooled with coolant, which circulates in the water jacket of the engine block. Cylinder Liners of Ø90-Ø250mm is GKNZ's main products, and the annual output can achieve 4million pieces, which mainly applied in heavy-duty and high-powered engines of petrochemical and clean fuels.

Scraper Ring

It is a cylindrical component that is inserted in the upper part of a Cylinder Liner (in the position of a top dead center above the top land of the piston) which is inside the engine. It is also called Protection Ring, Fire Ring, or Anti-polishing Ring. GKNZ can produce scraper ring diameters ranging from Ø90-Ø250mm, using the same material and centrifugal casting process as our cylinder liners. The thermal expansion and heat conduction are the same as those of the cylinder liner, and the wear resistance is similar to or better than that of the cylinder liner. The annual output can reach 2.1 million pieces.

Casting Parts

GKNZ can achieve centrifugal casting of materials such as gray cast iron, ductile iron, ductile iron, steel, etc; Customization is available upon request.

Precision Machining Services

GKNZ can provide precision machining methods such as turning, grinding, and milling to meet the precision machining needs of workpieces made of cast iron, steel, and other materials.

Heat Treatment Services

GKNZ has heat treatment capabilities such as quenching strengthening, stress relief annealing, and quenching and tempering treatment; Capable of surface treatment such as manganese phosphorus co-infiltration, gas nitriding, and rolling strengthening.