Jiande Huayun Chemical Equipment Co., Ltd was founded in 1993. Huayun had been engaging in the development, research, consultation, design, manufacturing and adjustment of chemical anticorrosive projects and industrial waste gas treatment equipment since 1983. Up to now, we have had over 30 years'' experiences in these fields, and successfully developed over 20 kinds of products, including PP heat exchanger, falling film absorber, film-type evaporator, horizontal type vacuum unit, constant temperature vacuum unit, industrial waste gas treatment equipment and high efficient water-jet vacuum pump, etc. Huayun has experienced great development, because we start from a small factory of PP board and equipment in semi-mechanical way and now became a large enterprise, with an annual output o..