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W A T L O W Note: Upward arrows are up toand not including specified watt
density. Downward arrows are
greater than or equal to specified
watt density. Barrel Heaters MI Band •Review Watt Density chart onpage 20 to ensure that the
application does not exceed the
maximum watt density at
operating temperature after
applying derating factors.•Locate clamping guideline for unitdiameter, width and watt density.•Description of guideline lettersare below.• Applications andTechnical Data MI Barrel Clamping Matrix Application Guide Dia.Width 8> 10 10> 12 12> 14 14> 16 16> 18 18> 20 20> 22 22> 24 24> 26 26> 28 > Injection moulding 1 1 1 > 1 4 > 1 1 4 > 1 1 4 > 1 1 4 > 1 1 4 > 1 1 4 > 1 1 4 > 1 1 1 1 1 2 in. 4 > 2 in. 2 in. 2 in. 1 > 2 in. 2 in. 1 > 2 in. 2 in. 1 > 2 in. 4 > 1 2 in. 2 1 > 2 in. 2 in. 1 > 2 in. 2 in. 1 > 2 in. 2 in. 1 > 2 in. 4 > 2 in. 1 > 2 in. 4 > 2 in. to 4 > in. to 7 > in. to 4 > in. to 7 > in. to 4 > in. to 7 > in. to 4 > in. to 7 > in. to 4 > in. to 7 > in. to 4 > in. to 7 > in. to 4 > in. to 7 > in. to 4 > in. to 7 > in. to 4 > in. to 7 > in. to 4 > in. to 7 > in. Barrel Heaters 807570656055504540353025201510 > 2 B Above Recommended Watt DensitiesConsult Engineering1 B B B B > Watt Density–W/in B D D D D A D D D D D D D D D D A A A A A C C C C C C C C C C C C C C > A=Standard clamping, expandable or one piece construction WidthClamp Points at Each Gap B=Spring clamps manufacturers, expandable or one piece construction * 127 mm (5 in.)3C=Spring clamps, at one gap, welded barrel nuts at other gap * 76.2 mm (3 in.)2D=Spring clamps, spring clamps at both gaps <76.2 mm (3 in.)1 MI Installation Procedures - For Standard Product 1.Install heaters over a cleansurface.2.After installing the unit, begin totighten the clamp screw. The
standard clamping screw is 6.35 mm-508 x 31.75 mm (0.25 in.-20 x 1.25 in.), nickel
plated allen head cap screw.
Begin tightening the clamp bars. If the clamp bars appear not to
have seated, tap the clamp bars
with a small industrial hammer to insure the
bars are well seated in the angle
formed by the 60 degree bent tab
and the heater.
3.If the bar has multiple screws,alternately tighten the screws at10 lb-in. as you would the lug nutson a car wheel to insure evenloading.4.Torque all screws toapproximately 80 lb-in. (9-N-M).5.When installing terminal lugs,torque the top nuts to 15-20 lb-in.or 2.26 N meters. 21
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