Watt-Flex® split-sheath cartridge heaters are available with a choice of mounting variations to accommodate a variety of process heating applications. Options include a stainless steel flange, mounting bracket, NPT fitting and puller end plug. Split-sheath construction allows each half of the heater to expand independently when energized for exceptional metal-to-metal contact with the surrounding bore, which maximizes heat transfer. Greater compaction of magnesium oxide around the coil provides superior heat conduction to the outer sheath, resulting in more responsive sheath temperatures, higher operating temperatures with cooler internal operation and up to five times longer life. Watt-Flex heaters are available in a range of standard diameters up to 1 inch, lengths from 1.25-72 inches and with operating temperatures up to 1700°F. Watt-Flex heaters, because of their continuous-coil design, have no cold spots between sections and produce a uniform temperature profile along the heater sheath.