Sino-US joint venture Beijing Zehua Chemical Engineering Co., Ltd. (Zehua), which is affiliated with Tsinghua University, was established in 1995. As a member of FRI (Fractionation Research Inc), Zehua Company is a highly focused engineering company, devoting to solve all our customer's problems in separation process with services including but not limited to: Process simulation/optimization, control strategy/safety analysis, hydraulic calculation & analysis and field trouble shooting/services. We also serve as one of the main suppliers of mass transfer equipment in China with diverse array of column tray, structured packings, random packings and column internals, of which you'll find detailed information in this catalogue Our know-how technology and products have successfully applied to more than 60 units and around 2000 commercial columns as of 2009 all over the worlds, relating to oil & gas processing, petroleum refining, petrochemicals, fertilizer, coal chemical and environment industries.