Changsha Zhengsheng Special Piston Ring Co.Ltd

Changsha Zhengsheng Special Piston Ring Co.Ltd-ZSPR, One of the Top Manufacturers of marine diesel Piston Ring, compressors Piston Ring ,engineering machinery piston ring and all type of piston ring casting in China with a history of more than 60 years.It introduced into advanced technologies from German Goetz Company and British AE Company.And ZSPR has set down product quality regulations according to QS-9000 and ISO-9001. 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.ZSPR can be the supplier for Engine Makers (OEM), and can design and process products according to customers requirements(drawing or sample). 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 ZSPR 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.       gray cast iron       Alloy cast iron       Ductile cast iron       Vermicular graphite cast iron       Malleable,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