Zhejiang Hongsen Machinery Co., Ltd was founded in 1992, which devotes itself in the R&D and manufacture of various valves in refrigeration and air conditioning system. In the past tens years, Hongsen Machinery staffs persistently adhere to open up, keep forging ahead and never rest content with their achievements. They insist on new and high productivity and quality efficiency. There are over 300 staffs and workers including a specialty team of 20 technicians in Hongsen Machinery, Hongsen Machinery has a close cooperation with the professors and experts in Zhejiang University, Shanghai Jiao Tong University and Tianjin University, and several senior engineers of leading domestic OEMs are invited as the consultants of the company. A number of techincal talents are trained in production, development and quality control and grow up in the conmpany. At present, Hongsen Machinery in capable to manufacture multiple categories of refrigeration and A/C accessory parts such as solenoid valve series, ball valve series and shut off valve series. Hongsen Machinery becomes one company integration R&D, production and marketing into one. Under the purpose of "good faith-oriented and customer the highest", Hongsen Machinery has passed UL, CE, CQC, product certification and ISO 14000 certification as well as ISO 9001 quality system certification. Keep products with high quality. Hongsen Machinery Always lays stress on the brand development and product quality. Hongsen Machinery invests more in the technical upgrading and introduces advanced technology. Now Hongsen Machinery products enjoy good quality as similar as international leading level and the products sell well both at home and abroad including some leading OEMs. Hongsen Machinery becomes one of the best manufactures and suppliers of refrigeration and A/C valves and accessory parts.