Mianyang Tianxuan Valve System Co., Ltd. is a professional manufacturer of valve rotators, valve seats, valve guides and valve spring retainers for gasoline diesel and CNG engines. The annual output for valve rotators reaches two million sets, ranking first in China., as well 30 million valve seats and 30 million valve guides yearly, taking the leading position in China.
We drafted the machinery standard of valve rotator - JB/T1418-2010

With a maturity analysis test center, we have passed TUV ISO/TS16949:2002 quality system certification. Our new generation powder metallurgy valve parts have passed the bench test of more than 30 engine manufacturers like SGMW from 300hr. to 500hr. and 30000km road testing as well as practical examination of 10000hr.

TIANXUAN is supplying valve parts for Dongfeng Motor, Brilliance Auto, Foton Auto, CHANA Auto, BYD Auto, Yuchai Machine and Weichai Power. We also offer matching services to G.M., Ford, Cummins, Caterpillar, Detroit, MAN Engine, Perkins, DEUTZ, Steyr, Mannheim and Wartsila. Our products are exported to Germany, the UK, Finland, France, Spain, the USA, Singapore and other countries and regions. We have won a high reputation among clients for high-quality products and excellent service.