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Cartridge Heaters
- All applications must consider fit tolerance, the correct
watt density and appropriate terminal connections.
Call
ASB Heating Elements Limited for Technical Assistance: 1-800-265-9699
Cartridge
Heaters
Cartridge Heaters are uniquely
designed to fit into metal blocks, dies, platens, molds etc.
Features Include:
- precisely concentrate the
heat where it is needed
- ideally suited to digital
temperature control systems
- low capital cost
- wide selection of:
- diameters and lengths,
up to 60" long
- wattages and watt densities
- terminations
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Crimped-On
Leads
A high temperature double crimp connects the MGT (450ºC)
leads to solid nickel pins. This construction is recommended
for applications with elevated temperatures. Due to the
rigid nickel pins,. this construction is not recommended
in applications where movement or flexing is encountered,
or if sharp bends are required adjacent to the heater exit.
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Swaged-In
Leads
High temperature MGT (450ºC) wire is internally connected
and swaged in place. This construction is recommended for
applications in which the leads must be bent at the exit
point from the heater and where mild lexing may be found.
For applications with continuous or more severe movement,
we would recommend metal braid or armor cable.
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Stainless
Steel Braid
High temperature MGT (450ºC) wire is internally connected
and swaged in place. This construction offers protection
against abrasion and sharp edges. This is a very strong
construction which offers full length flexibility. this
construction is recommended in applications with flexing
and where the leads must pass through metal openings or
routed along metal components.
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Stainless
Steel Hose (Armor Cable)
High temperature MGT (450ºC) wire is internally connected
and swaged in place. This construction is recommended for
applications in which the leads are subjected to abrasion
or run the risk of being pinched. this is the strongest
lead protection available and works well in moving or flexing
applications.
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Right
Angle Fiberglass Leads
High temperature MGT (450ºC) leads exiting at right
angle to the sheath. This construction offers a compact
design where space is limited. This construction is not
recommended where abrasion or flexing is present.
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Right
Angle Stainless Steel Braid
Stainless steel braid over high temperature MGT (450ºC)
wire exiting at right angle to the sheath. This construction
is recommended in applications with flexing and where the
leads must pass through metal openings or routed along metal
components. This construction is desirable when space is
limited and it is not feasible to bend standard leads.
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Right
Angle Stainless Steel Hose
(Armor Cable)
Stainless steel hose over high temperature MGT (450ºC)
wire exiting at right angle to sheath. This is the strongest
lead protection for use in applications where severe abrasion
is present. These l;eads offer good flexibility and are
good for moving or flexing applications.
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Heater
Diameter
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Minimum
Unheated Length
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1/8"
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Not Available
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1/4"
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1"
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5/16"
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1 1/2"
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3/8"
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1 1/2"
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1/2"
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1 1/2"
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5/8"
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1 9/16"
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3/4"
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1 7/8"
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15/16"
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1 7/8"
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1"
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1 7/8"
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Single
or Double Threaded Fittings
Single or double threded fittings attached to sheath to
allow for installation into threded holes.
Fitting Materials
- Brass, Steel and Stainless Steel
Leadwires
- Fiberglass for high temperature applications
- Teflon for moisture protection
- Stainless Braid or Hose for flexing applications
and
abrsion protection.
Terminal Boxes
- General purpose and moisture resistant housing
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Heater
Diameter
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NPT
Size
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X
Dimension
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Y
Dimension
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Y1
Dimension
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1/4"
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1/8 -
27
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3/8"
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3/16"
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1/4"
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3/8"
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1/4 -
18
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1/2"
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3/16"
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1/4"
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1/2"
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3/8 -
18
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9/16"
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1/4"
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1/4"
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5/8"
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1/2 -
14
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5/8"
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1/4"
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5/16"
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3/4"
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3/4 -
14
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3/4"
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1/4"
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3/8"
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7/8"
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1 - 11
1/2
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3/4"
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1/4"
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3/8"
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1"
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1 - 11
1/2
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3/4"
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1/4"
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3/8"
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1 1/4"
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1 1/4
- 11 1/2
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7/8"
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5/16"
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1/2"
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Mounting
Flanges
Mounting
flanges are recommended for applications where vibration
or movement may cause the heater to be disloged from its
hole. Stainless steel flanges are available in a variety
of sizes and configurations. The standard flange is round
and is supplied with two mounting holes. For heaters 5/8"
diameter and under, the flange would be 1 1/2" in diameter.
For larger diameter heaters the standard flange would be
2.00" in diameter.
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Internal Thermocouples
Internal thermocouples are built into the heater assembly to monitor
the internal or sheath temperatures. These are useful as high
limit devices or in applications where space is at a premium.
The power and sensor leads exit the sheath together and can be
ordered with a variety of lead protections. Not all thermocouple
configurations are available on smaller diameter heaters. Type
J and K calibrations are standard for the shown constructions.
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Grounded
at Disc End
The thermocouple junction is grounded to the disc end of
the heater. This construction is commonly used in hot runner
applications. The disc end can be filled with silver solder
and ground flat. This will ensure good contact when inserted
into a flat end blind hole.
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Ungrounded
at Disc End
The thermocouple junction is ungrounded and is located just
behind the disc end. This will give a reference temperature
of the part being heated.
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Grounded
at Center
The thermocouple junction is grounded to the sheath along
the length of the heater. The standard location is at the
center of the heater, but can be located anywhere along
the lenght of the sheath. This construction will provide
a quick response.
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Ungrounded
at Center
The thermocouple junction is ungrounded and is centered
in the diameter of the sheath. The standard location is
at the center of the heater, but can be located anywhere
along the length of the sheath. Typically used as a high
limit in air or vaccum applications
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