Type W-O-VI  Constant heating / cooling refrigeratory circulating system is designed for the jacketed-glass reactor to heat / cool / refrigerate.  It is integrated heating, cooling, refrigerating and circulating into one system; heating or cooling swiftly; controllable constant temperature and circulating.  It is an electrical energized equipment, operating easily.  It is the convenient source of the constant heating / cooling / refrigerating for the jacketed-glass reactor.  It is also suitable to use in the places which need the controllable constant heating / cooling circulating equipment.