Type DW: Distributed Wattage
Cartridge heaters can be designed to vary the wattage along the length of the heater. Specify the number of zones and the required watts and length per zone starting from the disk end. Leads can be connected externally or internally. The picture shows a heater with Type N externally connected leads. Heaters with other terminations may require a longer cold section at the lead end.
Type 3PH: Three Phase
In order to minimize the gauge of the wiring on high wattage cartridge heaters, 3-phase elements can be designed.
Type DV: Dual Voltage
3/8″ and 1/2″ diameter heaters may require a larger diameter transition area at the lead end. Cartridge heaters can be designed using 3-wire series/parallel circuits for dual voltage applications. Whether the heater is run on a high or low voltage, the wattage will be the same. DV1 120/240 volts DV2 240/480 volts
Type DWV: Dual Circuits
Independent resistance elements can be designed in a single cartridge heater for added versatility
Type MHZ: Multiple Heat Zones
3/8″ and 1/2″ diameter heaters may require a larger diameter transition area at the lead end. Multiple independently operated sections of the heater with a common wiring connection can be designed for increased flexibility.
Type GJ: Grounded Element Winding
For DC applications where the electrical circuit is negative grounded, the cartridge heater can be designed with one side of the element winding grounded to the sheath and a single lead wire exiting the cartridge heater.
Type GL: Ground Lead/Sheath
For those applications requiring a separate ground lead attached to the cartridge heater sheath. Standard ground lead wire is a 10″ long insulated stranded conductor. Optional insulated and color-coded leads are available.
Type LLC: Low Leakage Current
Low leakage current construction is available for those applications such as medical products that require strict conformity to the requirements of regulatory agencies.