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Specification
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Item Name
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Finned Tubular Heater
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Item No.
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PM-FTH
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Voltage
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6-600 V
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Wattage
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Customized
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Max. wattage density
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50w /sq cm
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Tube diameter
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3 mm to 30 mm (customized)
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Fins diameter
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15-45 mm
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Fins thickness
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2-6 mm
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Shape
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U shape, W shape, Coil shape, double W shape, straight, etc
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Max. operating temp:
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1000°C (depending on material)
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Diameter tolerance
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+/- 0.1mm
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Length tolerance
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+/- 3% (depending on different shapes)
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Wattage tolerance
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+/- 5%
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Voltage tolerance
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+/- 5%
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Certificates
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CE, RoHs
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Packaging
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Carton box / fumigation free wooden case
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Material
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Core
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Cr20Ni80, high quality Swedish resistance wire is avalible
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Insulation
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High purity compacted magnesium Oxide
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Sheath material
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SS304 / SS316L / Incoloy 800 / Copper / SS201 with or w/o Teflon coating
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Fins
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SS304 / SS316L / Copper / SS201 / Iron
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Accessories Information
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Threads
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Customized (such as M10, M12 etc) |
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Wire
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High temperature resistance wire available
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Description
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Introductions of Finned Tubular Heater
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In applications where Finned Tubular Electric Heaters are exposed to forced convection, placing fins around tubular heaters increases their surface area and thus improves their heat transferring capacity. Finned tubular heaters, compared to regular tubular heaters, run at lower surface temperatures for the same watt densities when placed in identical air streams. Graph 1 compares watt density, outlet air temperature, and the speed of air flow for regular and finned tubular heaters respectively. Despite their advantages, finned tubular heaters are not recommended for applications where outlet air temperatures exceed 600°F.
The physical characteristics of Finned Tubular Electric Heaters play a major role in the effectiveness of its heat transfer. The table below specifies the outside diameter of fins, their thickness, the spacing between consecutive fins, as well as the element sheath and fin material.
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The feature of Finned Tubular Heater
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1. Easy to install, control and maintain.
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2. Wide applications ( any tanks, drums or vessels with liquid or gases)
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3. Heating fast and efficiently
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4. Health and Safety
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5. Could be used in very high temperature, strong corrosive medium
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The applications of Finned Tubular Heater
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1. Duct Heater
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2. Load Bank
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3. Air condition systems
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4. Ovens
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5. Burn Ovens
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6. Forced air duct heating
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RFQ
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1. Diameter of heating tube and diameter of the finnes
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2. Length or width
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3. Shapes or drawings
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4. Voltage & wattage
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5. Quantity
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Reference information may help for your choice
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Tab1 : list various sheath materials, maximum allowable temperatures and mediums within which they are recommended to operate.
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Tab2 : list recommended maximum watt densities and medium for different materials.
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Tab1
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Sheath Material
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Maximum Sheath Temperature
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Applications
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Copper
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350 °F (170 °C)
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Immersion into water ,non corrosive low viscosity liquids
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Steel
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750 °F (400 °C)
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Oil, wax, asphalt, cast in aluminum or iron
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Stainless Steel 304-316
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1200 °F (600 °C)
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Corrosive liquids, food industry, sterilizers
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Incoloy
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1500 °F (815 °C)
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Air, corrosive liquids, clamped to surfaces
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Tab2
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Sheath Material
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Maximum Watts/cm2
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Medium
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Copper
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7 W/cm2
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Water, weak acid liquid
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Copper
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2.5 W/cm2
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Food oil, lubricating oil, hydraulic oil
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Stainless Steel 304-316
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11 W/cm2
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Water, weak acid liquid
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Stainless Steel 304-316
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2.5 W/cm2
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Food oil, lubricating oil, hydraulic oil
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Stainless Steel 304-316
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5 W/cm2
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Still air
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Stainless Steel 304-316
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5.5 W/cm2
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Flow rate is not low 6m/s air
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Stainless Steel 304-316
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13 W/cm2
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cast in aluminum or iron
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Incoloy
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10 W/cm2
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Still air
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Incoloy
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11 W/cm2
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Flow rate is not low 6m/s air
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By from -
