Chromalox Strip & Ring Heaters Modifications

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.
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