The product is composed of needle valve and needle valve body. Products cover the diesel main varieties and models at home and abroad, it's widely used in automobile, engineering machinery, petroleum machinery, ship diesel engine power, etc. At present, the company has independent research and development DLLA156DM420, DLLA155SN521 etc. More than 500 models. Company successively introduced the function of a batch of advanced technology, perfect production, testing advanced equipment, has realized the new technical process, a new ideal combination of production technology and production and processing, product yield and quality improved, needle valve, needle valve seat surface roundness under 0.0006 mm, compared with domestic similar products reach the domestic leading level.