The jacketed valve is classified into full jacket and partial jacket (half jacket).
A full jacket can heat the entire valve body including the flange root, and a partial jacket (half jacket) can heat the entire valve body except the flange root of the valve body to prevent the fluid in the valve from condensing due to temperature drop, resulting in condensation or viscosity increase, and to keep the fluid temperature in the valve, so as to ensure that the medium in the valve can work normally.