The Jacketed Ball Valve (Heating Jacket Ball Valve) with very well design to help the high temperature steam or oil flow over the valve ball & body parts to keep the media liquid. This applies especially to media like bitumen and liquid sulfur.Insulated valve jackets are reusable coverings that reduce heat loss and conserve energy in uninsulated valves. They also provide environmental, personnel, and passive fire protection. Insulated valve jackets are reusable coverings that reduce heat loss and conserve energy in uninsulated valves.