Barrel Heaters - Hasmak.com.tr

<strong>Heaters</strong>TubularUse the Milled Groove Sheath WattDensity and Groove Fit chart to findthe re<strong>com</strong>mended watt density ortightest groove fit. Optimum groovefit, without heat transfer cement, canbe determined by plotting theintersect point between the requiredsheath watt density and the Deltatemperature (T). If the Delta T is notknown, simply subtract the moldtemperature from the maximum540°C (1000°F) sheath temperature.Any <strong>com</strong>bination of watt density andgroove fit that results in a Delta Tbelow the re<strong>com</strong>mended maximumwill maximize heater life. Conversely,if the Delta T is greater, less heaterlife can be expected.How to OrderAll milled groove heaters are madeto-order.Due to precision formingrequirements, please provide adetailed drawing or CAD disk.Consult your Watlow representativefor price and shipment details. Tohelp the ordering process, providethe following information:• Operating temperature• Volts/watts• Sheath diameter and material• No-heat section• Electrical terminations• Bend configurations anddimensions• Groove cross section dimensions• QuantityDelta Temperature—°F1200110010009008007006005004003002001002Milled Groove Sheath Watt Density and Groove FitSheath Watt Density—W/cm 24 6 8 10 12 14 16Delta Temperature is Difference BetweenSheath and Steel Block Temperatures1.65 mm (0.065 in.) Groove Fit Without HTC0.18 mm (0.007 in.) Groove Fit Without HTC1.65 mm (0.065 in.) Groove Fit With HTC10 20 30 40 50 60 70 80 90 100 110 120Sheath Watt Density—W/in 2Replacement <strong>Heaters</strong>To order a replacement for anexisting milled groove heater,specify original Watlow codenumber, or provide dimensions ofthe <strong>com</strong>petitive heater, or thegroove dimensions from themanifold.Heat Transfer Cement (HTC)Heat transfer cement can maximizeheater performance and life byincreasing thermal conductivitybetween the sheath and manifold.The maximum exposuretemperature is 675°C (1250F°).Available in one quart cans. Toorder, specify code number148-15-2-1.600500400300200100CautionHeat transfer cement conductselectricity. Avoid contact withterminations, wiring and othersources of electric current.0Delta Temperature—°C382