This series of reaction vessels is a new single-layer glass reaction vessel developed by our company according to the actual needs and specified standards of customers. It absorbs the advantages of similar products at home and abroad, and boldly innovates. It is not only easy to use (can be easily moved, operated, cleaned, installed, and disassembled by one person), but also has a novel and practical structure with a beautiful and elegant appearance; Chengcheng is an ideal equipment for testing and production in modern chemistry, fine chemicals, biopharmaceuticals, and new material synthesis. The working principle of the reaction kettle is: the glass reaction kettle is filled with reaction materials and can be evacuated for stirring reaction; The external water (oil) bath can be heated with water or oil for heating reaction; And it can control the evaporation and reflux of the reaction solution, constant pressure feeding, and other functions. (Optional configuration of cold components, combined with a cooling source for low-temperature reactions)