zhongqing news
qinhuangdao metallurgical valve co., ltd. zhongqing hot air valve is eligible for seven national invention patents
qinhuangdao metallurgical valve co., ltd. zhongqing hot air valve through the introduction of german production technology, digestion and absorption, and constantly improve, develop metallurgical valve co., ltd. qinhuangdao youth ninth hot air valve. the valve has a simple structure, low production cost, water, energy, security, longevity and other characteristics. it is the blast furnace with hot air valve replacement products. there has been a utility model hot air valve body, valve plate, seal spigot, seven national hot valve body, valve stem seals agencies patents.