Kaifeng Dongjing Air Separation plant Co., Ltd (KFDJ) specialize in desiging and manufacturing air separation plant and related service , KFDJ has two large DCS controlled vacuum brazing furnaces (6500 * 1500 * 1500mm), one medium-sized DCS controlled vacuum brazing furnace (3300 * 1200 * 1200mm), three large plate rolling machines, two CNC cutting machines, one 16000 edge planer, 32 punching machines and eight pipe winding machines.Through many years of experimental research, 6200 x 1250 x 1200 mm plate heat exchanger has been successfully brazed.At present, the maximum weight of brazing workpiece is 6.5 tons, and the maximum working pressure is 10.0MPa.Widely used in air separation equipment and petrochemical fields.