machine accessory

Product Description

The material of Valve Seat made of high chrome molybdenum cast iron alloy is the advanced technology introduced from UnitedKidom Institute of internal-combustion engine and the latest formula developed by Shanghai internal-combustion engine institute under the actual situation of China . The Valve Guide is of high attrition endurance,high temperature endurance and high erosion endurance. Furthermore, this material is of better resistance to wear .and still make the engine work under worse conditional. Our products pass the destructive test for **0hrs which show our products� quality gain the best effect. Under normal conditional, this product can use **0~**0 thousand Kilometre which is higher than the valve guide made by .powder metallurgy ..