Backer Hotwatt Band Heaters Special Features

SF1A: Flexible leads with spring protector. Standard lead length is 6″. Longer lengths are available.

SF1B: Construction (similar to SF1A above) employs one leadwire on each side of gap. Same spring dimensions apply.

SF12: Male dead front armored plug. May be supplied on units with leads and conduit. Ground wire (SF6) should be specified when using any three prong plug. Specify conduit length and plug required as follows:

SF14: Flexible conduit for straight leads.

SF15A: Flexible conduit for right angle leads in line with heater.

SF15B: Flexible conduit for right angle leads, at 90° to heater.

SF16A: Stainless steel, flexible braid for straight leads. Specify braid length. Leads are supplied 6″ longer than braid.

SF16B: Stainless steel, flexible braid for individual leads out from edge of heater.

SF29: Multiple heat; when a single unit with multiple wattages is necessary. Some uses of these units include: quick heat-up with a standby circuit for maintenance of low temperature; providing different wattages when there is a wide variation in thermal loads; and replacing more expensive rheostats or powerstats for wattage control.

SF37: Stainless steel sheath

XS79: 2 piece construction through 11 1/2″ I.D.

XS79-1: Two piece construction. Over 11 1/2″ I.D. to 22 1/2″ I.D.

XS79-2: Three piece construction. Over 22 1/2″ I.D. to 36″ I.D.

XS79-3: Four piece construction. Over 36″ I.D. to 48″ I.D.

Standard voltages are either 120V or 240V. Other voltages are available.

Inside diameters are based upon outside diameter of area being heated.

Width Dimensions:

±1/16″

Gap Dimensions:

1″ to 6″ dia. – 5/16″ nom.
6″ to 11 1/2″ dia. – 3/8″ nom.
11 1/2″ to 23″ dia. – 3/8″ nom.

Wattage tolerance is +5%, -10% at voltage specified.