IPSWICH,
MA -
Watt-Flex® Split-Sheath Cartridge Heaters by Dalton Electric
can be manufactured with a groove along the outside of the sheath
to accommodate a needle-type thermocouple. This design provides
more accurate sensing and control than those of conventional heaters
for temperature-critical processing applications, such as molding
heat-sensitive resins.
Unlike those
in conventional internal-thermocouple heaters, the Watt-Flex thermocouple
can be replaced independently
of the heater. And while the thermocouples in conventional heaters
are fixed and measure the temperature at either the middle or
tip of the cartridge, the Watt-Flex thermocouple is movable, allowing
temperature measurement at any point along the heater sheath.
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Due
to their unique split-sheath design, Watt-Flex heaters run more
efficiently, last longer, and are more easily replaced than conventional
heaters, dramatically reducing the overall cost of process heating.
Split-sheath construction allows each half of the heater to expand
independently when energized for exceptional metal-to-metal contact
with the surrounding bore. This in turn maximizes heat transfer
even in oversized bores. 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. Because of their continuous-coil design,
Watt-Flex heaters have no cold spots between sections and thus
produce a uniform temperature profile along the heater sheath.
With no sections to burn out, the entire heater is either on or
off. The continuous coil also allows a hot tip option. When the
heater is de-energized, the split sheath contracts uniformly for
easy removal. In fact, Watt-Flex heaters are warranted removable
from bores and sleeves.
Watt-Flex Heaters
are available in standard diameters of 1/4, 3/8, 1/2, 5/8, 11/16,
3/4, and 1 inch, as well as 8, 10, 12, 12.5, 15, 16, and 20 mm;
in lengths
from 11/4 to 72 inches; and with operating temperatures to 1700°F. Heaters
are available in custom lengths and electrical ratings, with hot
and cool tips. Customers
also have a choice of leads, including flexible stainless-steel hose or braid
to protect against frequent flexing and abrasion, straight or right-angle headers,
threaded post terminals, extra-long leads, high-temperature leads, fiberglass
or silicon-rubber sleeving, an internal ground wire, and a Quick Disconnect
lead with a convenient male plug. Mounting variations include a
stainless steel flange,
a mounting bracket, an NPT fitting, and a puller end plug.
For more information,
contact: Eli Whitney, Dalton Electric Heating Co., Inc., 28 Hayward
Street, Ipswich, MA 01938, TEL: (978) 356-9844, FAX: (978) 356-9846,
e-mail: sales@daltonelectric.com, www.daltonelectric.com.
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