Since designing and mapping in accordance with the German patented products B/F413F rotary valve structure, our company has designed and produced more than STEYR、B/F413F、FL912/812D、6T23、CW200 for the Hangzhou Engine Factory, Weiyang Diesel Factory, North of China Diesel Factory, Anqing Ship Diesel Factory, Shanxi Diesel Factory, and Guangzhou Diesel Factory, as well as the upper or lower forced valve rotator of various types for more than 30 types of autos of the Daihatsu of Japan. At present, our factory own not only higher design level and capabilities of the valve rotators, but also advanced methods of its  production, precise detecting and testing equipments for the performance , as well as the solid production capacity of three million sets annually. And the quality has been very stable and the performances are reliable.

The products are used to replace the traditional valve spring lower seats to support valve springs, and can drive the valves to revolve forcefully, so as to remove the carbon laydown on the valve cones. So the valves are heated uniformly, and the valve group can be improved in terms of the lubrication conditions, as well as the valve life will be longer and pitting corrosion resistance ability is promoted. The products are environmental- friendly ones, which can improve the working efficiency of the engine at a certain extent.