Barrel Heaters - Hasmak.com.tr

Die andFormer <strong>Heaters</strong>Tubular12002Milled Groove Sheath Watt Density and Groove FitSheath Watt Density—W/cm 24 6 8 10 12 14 16Die and Former HeaterFeatures and Benefits• Precise conformity to customerspecifications ensures easyinstallation—bending tolerancesas low as ± 0.002 inch.• Common element diametersinclude: 6.6, 8, 8.5, 9.5 and 10.9 mm(0.260, 0.315, 0.335, 0.375 and0.430 in.).• Incoloy ® sheath material for hightemperatures, 304 stainless steelfor smaller radius bends.• Superior resistance coil designproduces even heating.• Threaded stud or lead wiretermination as required.Use 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 which 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.Delta Temperature—°F11001000900800700600500400300200100Delta Temperature is Difference BetweenSheath and Steel Block Temperatures10 20 30 40 50 60 70 80 90 100 110 120Sheath Watt Density—W/in 2• Re<strong>com</strong>mended maximum watt density = 6.2 to 10.9 W/cm 2 (40 to 70 W/in 2 )• Re<strong>com</strong>mended groove = 1.65 mm (0.065 in.) larger in diameter than sheath diameter,and use heat transfer cement• Re<strong>com</strong>mended heater sheath diameter = 8 mm (0.315 in.)• Re<strong>com</strong>mended maximum Delta T = 205°C (400°F)• Maximum sheath temperature = 540°C (1000°F)• Re<strong>com</strong>mended sheath material = Incoloy ®How to OrderAll milled groove heaters are madeto-order.Due to precision formingrequirements, please provide adetailed drawing or electronic file.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• Quantity1.65 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 HTC600500400300200100Heat Transfer Cement (HTC)Heat transfer cement can maximizeheater performance and life byincreasing thermal conductivitybetween the sheath and manifold.The maximum exposure temperatureis 675°C (1250°F). Available in onequart cans. To order, specify codenumber 148-15-2-1.CautionHeat transfer cement conductselectricity. Avoid contact withterminations, wiring and othersources of electric current.0Delta Temperature—°C236