MB Terminations

Online Industrial Process Equipment

High Quality Products - Long-Term Reliability

BAND HEATER TERMINATIONS Leads:
	Fig. 1: Usual design for nozzle heating applications. 12" leads are standard.	Fig. 6: Flexible armor cable is the best solution to lead abrasion problems. 12" armor with 14" overall length leads are standard. Specify alternate position.
	Fig. 3: Single conductor metal braid over lead wire. Offers most practical solution to abrasion problem. 12" braid with 14" overall length leads are standard.	Fig. 7: Double conductor metal braid exiting from edge 180° from gap.
	Fig. 4: Standard lead wires exiting 180° from gap.	Fig. 16: 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. 5: Leads exit at right angle to sheath 5/8" from gap. 12" lead wire in 3" long sleeving is standard. Specify alternate position.

Screw Terminals:		Special Features:
	Fig. T1: Standard position under 2-1/2" wide.		Fig. 12: 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.
	Fig. T2: Standard position over 2-1/2"wide.		Fig. 14: Half Band-eases installation in difficult situations. Shown with T1 Terminals and Fig. 10 by-pass straps. Available with any termination or mounting arrangement
	Fig. T3: Standard with terminal box.		Fig. 15: 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.
	Fig. B1 (shown) B2, B3: 10-32 thread requires 1/2" clearance from cylinder.		Fig. 17: Splitcase-Allows heater to be opened one time for mounting. Available with any termination or mounting arrangement.

MOUNTING CONFIGURATIONS

Fig. 9 Strap-made from a low expansion alloy to tighten around the whole circumference of the heater.
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.

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

Fig. 19: Standard Profile Barrel Nut Assembly Welded to Sheath

Fig. 20: 1-1/4" Wide Barrel Assembly Welded to Sheath

Fig. 21 Quick Release Assembly with Spring Loaded Screw Assembly Welded to Sheath

TERMINAL PROTECTION

Terminal Box Cover: 2" H x1-1/2" W x 2" 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

Fig. 7P: Plug can be attached to any lead configuration.

EUROPEAN STYLE HIGH TEMPERATURE PLUG

Fig. 110: Dimensions-3-1/2" H x 1-5/16" L x 2-15/16" W
Fig. 115: Dimensions-1-3/8" H x 3-7/16" L x 1-7/8" W
Fig. GQ8: Receptacle (PC4396-3)

Additional Variations
· Three terminal or lead, dual voltage, three phase or ground
· Appliance pin terminals
· Full length fiberglass sleeving
· Rectangular or segment band heatersprovide drawing
· Outside diameter design for internally heating cylinder
· Stainless steel or Monel sheath for use in corrosive atmosphere
· Metric Sizes

SPECIFICATION DATA

Watt Density

Termination
Figure Mounting Figure Cold Area

Fig. 1 & 3 Fig. 9,10 or 20
Fig. 18,19 or 21 1"

Fig. 1 & 3 Fig. 8 or 11 1" if I.D.4"
& width3"
all other cases-3/4"

Fig. 5,6 & 16 all 1-3/8"

Fig. 4 & 7 all 1-3/4"

T1 Fig. 9 & 10 1-1/2"

T1 Fig. 8 1"

T2 Fig. 9 & 10 1-1/8"

T2 Fig. 8 1-3/8"

T3 Fig. 8,9 & 10 1"

I.D.

Standard Gap

>3/4" - 5" 1/4"

> 5" - 10" 1/2"

> 10" - 16" 3/4"

> 16" 1"

Physical Limitations of Mica Band Heaters
Full Band: 21-1/2" Maximum Diameter
Half Band: 43-1/2" Maximum Diameter

Termination Min. Dia. Min
Width

Figure Style Full Band Half Band

1 Leads 3/4" 1-3/4" 3/4"

T1 Screw
Terminals 1-1/2" 2" 1"

T2 1-1/2" 3" 2-1/2"

T3 1-1/2" 3" 1"

3 Braided Leads 3/4" 1-3/4" 3/4"

5 Leads 1-1/2" 3" 1"

6 Armor Leads 1-1/2" 3" 1"

7P Armor w/Plug 1-1/2" 3" 1"

8 Mounted Flange 3/4" 1-3/4" 3/4"

11 Wedge Mount 1" -- 3/4" (6" max.)

12 Hinged Half Band -- 1-3/4" 1-1/2"

16 Braided Leads 1-1/2" 3" 1"

17 T1 & T3 1-1/2" -- 1"

T2 1-1/2" -- 2-1/2"

Leads 1-1/2" -- 3/4"

110 EuroPlug 3-1/2" -- 1-1/8"

115 EuroPlug 4" -- 2"

Typical Thickness is 5/32"
It is not recommended to use Mica Band Heaters more than 3" wide. 1 - 3" wide heaters have shown to be more efficient and economical.

Recommended Maximum Watt Density

Steel Block Temp in ºF
With SCR or SSR control output, watt density can be increased up to 30%.

Ordering Information:
· Catalog number if available
· Inside Diameter and Width
· Wattage and Voltage (resistance tolerance +
· 10%, -5%). Cold resistance 6% lower than
· hot resistance.
· If Half Band, Wattage and Voltage each half
· Type of termination, location and length of
· leads, if applicable.
· Type of mounting
· Submit sketch or drawing if necessary

Maintenance and Trouble Shooting
1. Check Fit: The heater I.D. must be the same as the O.D. of the cylinder.
2. Secure Firmly: To compensate for normal expansion, retighten periodically. Cycling and normal metal expansion may cause the heaters to loosen.
3. Eliminate Contamination: Oil, plastic, dirt, etc., will carbonize and shorten heater life.
4. Maintain Proper Voltage: The heater should be rated for the highest voltage anticipated. Operation of a 220 Volt heater on 240 Volt will raise the wattage by approximately 18%, increasing watt density and reducing heater life.
5. Provide Proper Maintenance:
  1. Tighten screw terminals firmly, but avoid excessive pressure.
  2. Protect leads from abuse and abrasion,
  3. Maintain temperature controls and accessories in good working condition to avoid over-temperature operating conditions.
6. Do not open one piece band heaters or internal damage may result. If a Full Band Heater cannot be installed over the end of the cylinder, then use a Split Case or Half Band Heater for best results.
7. Trouble Shooting: Check wiring for poor connections or open control if heater fails to heat when initially energized. Sustained high operating temperature may reduce heater life. If terminals oxidize, tighten connections and check for proper wire size.

Back

Home

Important Notice: By purchasing products from this Site, you acknowledge and agree that you have read and accept the Terms and Conditions of this online store. For more information email us at: info@iprocessmart.com