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ZSPR is the designated component supplier for China Railway Ministry and China National Marine Cooperation. And It is the main piston rings supplier for most of the high power diesel engine factories of China. It also can supply a wide range of piston ring ,like MAN B&W,MTU,MAK,DAIHASU,PIESTICK,SULZER,YANMAR,MWM.

The largest single application is for marine diesel engines .However, ZSPR also supply piston rings for many other applications including:

Ship diesel engines

Diesel engine generators

Diesel railway locomotives

Oil rigs

Air compressors

Pile driver

Products manufactured in our factory have a wide range of different types. These include: plain, barrel face, keystone, taper faced, torsion, under cut, coil expander, oil control and combined rings.

ZSPR also supply all type of piston ring casting, it has developed its own material series, ranging from low and medium grade to high grade with full specifications to meet different engine needs .

Cast (gray cast) iron

Alloy cast iron

Ductile cast iron

Vermicular graphite cast iron

Malleable iron, semi-malleable iron

steel ring

Metal ceramic

The following are different types of coatings which are commonly supplied by ZSPR:

Chrome plating

phosphate coating

copper plating

tin plating

ceramic chrome plating

plasma sprayed coating

ZSPR can be the supplier for Engine Makers (OEM), and can design and process products according to customers requirements(drawing or sample).

We control every production process to make sure supply the high quality to our customers.It keep being our aim to supply high quality with competitive price to our customer. If you interested in our products, pls feel free to inform us the details you. We are sincerely hope to cooperate with any company or person from any countries or regions. We assure you that any question or inquiry from you will receive our prompt attention.