HUNAN ZHENGYUAN POWER PARTS CO., LTD which located in Changsha, Hunan, China since 1943.

We are professional Manufacturer for Piston Ring、seals and compressor rings up to 800 mm which cover the automotives rings, industrial rings and marine engines.

Especially for diesel engine,such as BENZ, MAN, CUMMINS, CATERPILLAR, PERKINS, MITSUBISHI, ISUZU, HINO, DEUTZ, DAEWOO...

We can also handle all kinds of new products' design and development.

We can afford you perfect quality and price, because we are the first manufacturer of piston rings in China and update our equipment and technology at the same time.

We have build up strong partnership with many famous domestic factories for OEM, like Shanghai Diesel Engine Co., Ltd. (SDEC), Guangxi Yulin Diesel Engine Co., Ltd. and YTO group Co., Ltd