About Us
Hubei Longst Trading Co., Ltd is located in Botou, the "hometown of casting" in China. It is a professional production company dedicated to valve research and development, production, sales, technical consultation, and after-sales service. The company covers an area of over 50000 square meters, with over 300 employees and 15 engineering and technical personnel. It produces approximately 20000 tons of castings and 200000 sets of finished valve products annually. The main products include more than ten series, including water supply and drainage valve series, HVAC valve series, fire valve series, industrial valve series, and more than 1000 specifications. The products are produced using advanced domestic and international standards such as national standards, British standards, German standards, American standards, and Korean standards. We have over 100 sales outlets in China, with a comprehensive sales and after-sales network. Our products have been sold to multiple countries and regions around the world.Hubei Longst Trading Co., Ltd Industries has established its own casting branch in order to become the most excellent and professional valve manufacturer. We now have three advanced molding lines at home and abroad: the Japanese Tojo fully automatic horizontal molding line, with a sandbox inner diameter size of 580mm * 610mm; Weifang Kailong fully automatic static pressure horizontal line, sandbox inner diameter size 950mm * 1000mm; The Shanghai Hongque resin sand molding production line has a sand box inner diameter size of 2500mm * 3000mm and a material testing laboratory, which can test the tensile strength, metallography, and chemical composition of castings. The weight of a single piece produced can range from a few kilograms to a few hundred kilograms, with a maximum of several tons. While meeting the requirements of self sold products, it can also undertake precision castings with different requirements externally.Hubei Longst Trading Co., Ltd has an organic processing workshop: all adopt advanced specialized equipment such as valve dedicated CNC lathes and CNC drilling machines. Spraying workshop: Three fully automatic spraying assembly lines are adopted. Rubber workshop: Fully automatic flat vulcanization machine and automatic rubber pressing machine are used, and imported EPDM raw rubber is used for rubber. Assembly workshop: There are over twenty valve pressure test benches, each valve has undergone strict pressure testing, and a new valve flow detection line has been built. The company has hired well-known domestic technical consultants and established a scientific quality assurance system, providing reliable guarantees for every product produced,
