Barrel Heaters - Hasmak.com.tr

W A T L O W<strong>Barrel</strong> <strong>Heaters</strong>MI BandApplications andTechnical Data• Review Watt Density chart onpage 20 to ensure that theapplication does not exceed themaximum watt density atoperating temperature afterapplying derating factors.• Locate clamping guideline for unitdiameter, width and watt density.• Description of guideline lettersare below.• Note: Upward arrows are up toand not including specified wattdensity. Downward arrows aregreater than or equal to specifiedwatt density.MI <strong>Barrel</strong> Clamping Matrix Application GuideDia.8 > 10 10 > 12 12 > 14 14 > 16 16 > 18 18 > 20 20 > 22 22 > 24 24 > 26 26 > 28Watt Density–W/in 28075706560555045403530252015100Width1 1 2 in. 4 1 2 in.to 4in.BAto 7in.BA1 1 2 in.to 4in.BA4 1 2 in.to 7in.BA1 1 2 in.to 4in.BA4 1 2 in.to 7in.BA1 1 2 in.to 4in.DC4 1 2 in.to 7in.DC1 1 2 in. 4 11 2 in. 1 1 2 in. 4 1 2 in.to 4in.DCto 7in.to 4in.to 7in.1 1 2 in.to 4in.4 1 2 in.to 7in.1 1 2 in.to 4in.4 1 2 in.to 7in.Above Re<strong>com</strong>mended Watt DensitiesConsult EngineeringA = Standard clamping, expandable or one piece construction Width Clamp Points at Each GapB = Spring clamps, 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.) 1DCDCDCDCDCDCDC1 1 2 in.to 4in.DC4 1 2 in.to 7in.DC1 1 2 in.to 4in.DC4 1 2 in.to 7in.DCInjection Molding<strong>Barrel</strong> <strong>Heaters</strong>MI Installation Procedures - For Standard Product1.Install heaters over a cleansurface.2.After installing the unit, begin totighten the clamp screw. Thestandard clamping screw is6.35 mm-508 x 31.75 mm(0.25 in.-20 x 1.25 in.), nickelplated allen head cap screw.Begin tightening the clamp bars.If the clamp bars appear not tohave seated, tap the clamp barswith a small hammer to insure thebars are well seated in the angleformed by the 60 degree bent taband 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