Mica Band Heaters

A mica core produces a thin, efficient heater. Heat from the precisely wound Nichrome element is quickly transferred to the working surface for fast heat-up and response. Mica provides excellent dielectric strength and heat transfer capability for long heater life.

The mica core is encased in a continuous corrosion resistant sheath and formed. All full mica band heaters are designed with closed ends to protect against contamination. Maximum sheath temperature is 800°F.

Lead Configurations

	Fig. A: Usual design for nozzle heating applications. 12″ leads are standard.		Fig. C (with braid): Double conductor metal braid exiting from edge 180° from gap.
	Fig. D: Single conductor metal braid over lead wire. Offers most practical solution to abrasion problem. 12″ braid with 14″ overall length leads are standard.		Fig. E: Double conductor metal braid over lead wires at same position as Fig. 5. 12″ braid with 14″ overall length leads are standard. Specify alternate position.
	Fig. C: Standard lead wires exiting 180° from gap.		Fig. H: On either side of gap/both sides of gap.
	Fig. B: Leads exit at right angle to sheath 5/8″ from gap. 12″ lead wire in 3″ long sleeving is standard. Specify alternate position.		Fig. I: Both terminals side-by-side on same side of gap.
	Fig. F: Flexible armor cable is the best solution to lead abrasion problems. 12″ armor with 14″ overall length leads are standard. Specify alternate position.

Mounting Configurations

Fig. 9 Strap-made from a low expansion alloy to tighten around the whole circumference of the heater with 5/16 socket head bolt. Low Profile: H = 1/4″, 1/2″ wide (Supplied on 3″ I.D. and less). Standard Profile: H = 3/8″, 5/8″ wide (supplied on 3-1/8″ I.D. and larger). Also available with hose clamp or punch lock strap.	Fig. 10 By-Pass Strap-Supplied on less than 2″ wide with terminals or Figures 5, 6 or 16.
Fig. 8 Mounting Flange-a secondary means for mounting where a built-in method is preferred with with 5/16 socket head bolt.	Fig.11 Wedge Mount-for applications where an extremely low profile is required or where access is limited. Available with Figures 1, 3, 4, 5, 7 and 16 leads.
Fig. 18: Low Profile Barrel Nut Assembly Welded to Sheath with 6-32 screw.	Fig.19: Standard Profile Barrel Nut Assembly Welded to Sheath with 10-32 screw.
Fig. 20: 1-1/4″ Wide Barrel Assembly Welded to Sheath with 5/16 – 18 socket head screw.	Fig.21 Quick Release Assembly with Spring Loaded Screw Assembly Welded to Sheath with 1/4 – 20 screw.

Special Features

	Hinge: Hinged Half-Band- convenient where two piece heaters are required. Shown with Fig. 8 mounting flange and T2 screw terminals. Available with any termination or mounting arrangement.		Holes / Cut-outs: Probe holes and cut-outs-specify location in degrees from center of gap and size or provide drawing. Often a larger gap (standard gap is 1/4″ – 1″) will serve the same purpose.
	2 Piece Construction: Half Band-eases installation in difficult situations. Shown with T1 Terminals and Fig. 10 by-pass straps. Available with any termination or mounting arrangement		Expandable: Splitcase-Allows heater to be opened one time for mounting. Available with any termination or mounting arrangement.

Terminal Protection

Terminal Box Cover: 1-1/2″ H x1-1/2″ W x 3″ L. Also available in a 2-1/4″ H x 2-1/16″ W x 4-1/2″ L terminal box for larger clearance to terminals.Ceramic Terminal Cover: 7/8″ high x 3/4″ O.D. for 10-24 thread. (PC4379-2; PC4380-1) Plugs Plugs: Plug can be attached to any lead configuration. European Style High Temperature Plug Erge Plug in Straight Housing: Dimensions-3-1/2″ H x 1-5/16″ L x 2-15/16″ WErge Plug in 90 Degree Housing: Dimensions-1-3/8″ H x 3-7/16″ L x 1-7/8″ WFemale Erge Plug: Receptacle (PC4396-3)