Davis-Standard’s patented heater/cooler barrel shroud increases the energy efficiency of single-screw extruders’ temperature control system by up to 50 percent, company officials say. This is especially beneficial for higher temperature applications, such as extrusion coating, cast film and tubing processes. The company has sold several barrel shrouds on new extruders, and many customers have requested retrofits. Unless the extruder has to be disassembled, the retrofit time is minimal. The shroud is broken up into parts that fit over each barrel zone, joined together with a stainless steel adjustable fastener. Shroud cutouts accommodate barrel wiring, and top or side venting options support maximum cooling efficiency depending on the process. Company officials say the added insulation reduces the energy required to maintain the barrel set point, resulting in significant cost savings.