Strip & Ring Heaters
Components
Modifications
Lengthwise Bending
Lengthwise Bending for clamping around pipes
or cylindrical vessels. Terminals may be located
inside or outside of curvature for all types listed.
3" Min. Inside Radius — Type S, SE, OT PT,
TH, NH, SNH, SN and ST.
6" Min. Inside Radius — Type SSE, SSEM,
SSNH and SSNHM.
4-3/4" Min. Inside Radius — Type WS.
Lengthwise Bending
Cross-Section Curving
Cross-Section Curving — Type SE only, for
clamping strips to 2, 2-1/2, 3, 4, 6, 8 and 12"
pipes. For larger size pipe, use flat strips. Radii
available 1-3/16, 1-7/16, 1-3/4, 2-1/4, 3-5/16,
4-5/16 and 6-5/16" and 8-3/4”. Terminals
outside only.
Cross-Section Curving
Dual Contact Surface — Type SE only. 53-7/8"
maximum A dimension. Flush-top construction
gives good contact for all surfaces of the strip
heater. Ideal for use in machined slots and
installing between two smooth metal surfaces.
Without Mounting Tabs
Without Mounting Tabs — All types. Permits
installing more heat in a given confined space.
Specify “without mounting tabs” when
ordering this feature.
Extra Strong Mounting Tabs — All types ex-
cept WS. Recommended when strips are bent
lengthwise and tabs are used for bolting.
®
Monel
Sheath — Type S, SE, OT, PT, HSP
and WS.
Stainless Steel Sheath — All types.
Cover for Seamless Strips, Factory
Welded
Cover for Seamless Strips with Threaded
Opening for Conduit — Cover is welded to
heater. Specify position of threaded opening
either on top of cover, or as shown. Type SSE,
SSEM and SSNHM.
Special Length Terminals — All types. Where a
shorter or longer terminal bolt than standard shown
in drawing is needed, indicate length needed.
Rubber-Molded Terminals
Rubber-Molded Terminals — Type NS only.
Used generally in low temperature applications where moisture, condensation and high
humidity are considerations. Available in neoprene-rubber (to 190°F). Longer cold end or
lower wattage is required to assure temperature limit of molding material is not exceeded.
End opposite terminal is welded closed.
1
1-1/2
1/2
9/16
Special Lead Wire Terminal
Construction
Special Lead Wire Terminal Construction
— All types. Specified most often when clear-
ance is unavailable for standard terminals and
when lead wires are more suitable for wiring
to nearby components.
Special Lengths — Type PT, SE, SN and SNH
only. Special lengths are made-to-order for
instances in which the amount of heat applied
to a surface is critical and standard lengths are
not suitable.
Special Voltage and Wattage — All types.
Certain highly specialized applications may
require special ratings. However, most can be
handled with standard heaters or standard ratings applied on an alternate voltage. Contact
your Local Chromalox Sales office.
Special Wattage Distribution — All types except TH. When even temperatures are required
and end losses may cause an unsatisfactory
temperature drop near the edges, additional
wattage can be provided at each end of the
strip to make up for losses.
A-58
Fahnestock® Terminals
Fahnestock® Terminals — Type S only. For
quick temporary connections where ambient
temperatures do not exceed 150°C. Maximum
recommended amperage is 7.5 Amps.
Secondary Insulation Bushing
Secondary Insulation Bushings — All Types
except NS. Must be used when strips are
mounted for air heating only or when connected in series on line voltages 480V or
above. Note — To accommodate bushings,
a 17/32 x 11/16" diameter mounting hole in
tabs should be specified for heaters. To Order
— Specify PCN 255716 (includes bushing and
hardware for one strip) and quantity.