Silicone leads for temperatures
to 390°F (200°C) are most often supplied, but many other types are
available. The leads are attached to the element within the transition
area and covered with a 1" x 1" (typical) patch of the
same material as the sheath.
The entire lead transition assembly
is then vulcanized to the heater sheath. Leads can be arranged to
exit at about any point on the element sheath, corner, or from an
external tab. Neoprene, silicone and Teflon leads along with HPN
cord and plug sets can be supplied.
Pressure Sensitive Adhesive (PSA)
is a factory applied material for bonding Flexible Heaters to a
flat, smooth surface. A peel-away protective backing allows simple
field installation. The maximum element temperature for PSA use
is 300°F (150°C) continuous, 455°F (235°C) intermittent, at no more
than 5 watts per square inch. Heaters with PSA should be stored
no more than 6 months before installation.
Factory Vulcanizing provides excellent heat transfer from the heater
element to the customer part. Strong, free of air gaps and with
the longest possible heater life are advantages of Factory Vulcanizing.
Maximum sheath temperature is 455°F (235°C). For field applied adhesives, an RTV Room Temperature Vulcanizing
Adhesive or Contact Cement are available.
Also available for Flexible Heaters are several mechanical field
mounting devices such as hooks and laces, grommets and laces, spring
loaded latches, snaps or velcro.
THERMOSTATS AND SENSORS
Many other thermostat temperature
ranges and ratings are available than what is shown. A minimum order
quantity may apply. Thermostats separate from heater and ambient
sensing thermostats in several temperature ranges are also available.
Thermocouples, RTD's, thermistors and thermal fuses are normally
mounted under a silicone rubber cap which is vulcanized to the heater
sheath. The position can be anywhere on the heater surface.
Thermostats are typically integral to the heater, encapsulated
in silicone rubber and mounted in a heated area. The position is
determined based upon application considerations, prototyping and
Thermostats rated at 125V/15A, 250V/10A. Thermostat can be wired separately when rating is exceeded. Typically, the differential between the on and off position is 30°F. Tolerance: ± 5°F open ± 8°F closed