Industrial Furnace Heaters - Bundle Rod Heater Tempsens Catalog

Bundle Rod Heater consists of circular ceramic beads that hold the heating elements. They are designed for long life and maintenance-free operation. Designed & manufactured in low voltages for faster heating in order to achieve temperatures quickly, these heaters can be mounted horizontally or vertically. The element can be provided in ferritic alloys up to 1250° C and Ni Cr alloy up to 1100°C materials.

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Construction

1. Direct heating element wire

2. Ceramic Disc: for hold the heating element & insulation

3. Fiber Disc: for holds the terminal rod and prevent heat loss

4. Center Rod: for alignment & take the weight of heater bundle

Advantages

Carbon Dioxide emissions are reduced to avoid the corrosion of furnace gas to the heating element or avoid the contact of burning outcome.
Convenient to control temperature, assemble and maintenance and easy to seal.
Can be Horizontal or vertical mounted
Better technical properties and longer working life
Higher resistivity & surface load
Free from oxide debris
Cost-effective with High watt density output.

Heating element

Ferritic alloy powder metallurgical element, Mara FeCrAl, NiCr 80/20
Watt Density

1/10 W/cm²
Max. Temperature

Up to 1250°C
Cold resistance tolerance

≤3%
Power

1 kW to 75 kW

Physical and Mechanical Properties of Ferritic alloys & Nichrome element

Heating Element Grade		Mara FeCrAl -Super	Mara FeCrAl-60	Mara FeCrAl-55	Mara FeCrAl-48	Mara Nichrome-80/20
Standard chemical composition ％	Al	6	6	5.5	4.8	Ni-80
	Cr	23	23	23	23	20
	Fe	Balance	Balance	Balance	Balance	0
Max continuous operating temperature	℃	1420	1400	1300	1200	1200
Melting point	℃	1500	1500	1500	1500	1400
Electric resistivity at 20℃	μΩ-m	1.45±5%	1.45±5%	1.40±5%	1.42±5%	1.08±5%
Density	g/cm³	7.1	7.1	7.2	7.2	8.4
Thermal expansion factor 20℃〜1,000℃	℃^-1	14.8X10^-6	13.6X10^-6	13.6X10^-6	14.8X10^-6	17.6X10^-6
Tensile strength	N/mm²	650 〜900	650 〜900	650 〜900	630 〜850	700 〜900
Elongation	％	15 〜25	15 〜25	15 〜30	10 〜30	20 or more
Hardness	Hv	220〜240	220〜240	220〜240	220〜240	150 〜190
Repeat bending frequency	F/R	≥5	≥5	≥5	≥5
Continuous service time	Hours/℃	≥300/1300	≥300/1300	≥300/1300	≥100/1300	≥300/1200
Magnetic properties		Magnetic	Magnetic	Magnetic	Magnetic	Non-Magnetic

Bundle Rod Heater Accessories

Radiant Tube	Stainless steel SS grade, Incoloy, PMD, Cast alloys
Thickness of Tube	1.5 to 8mm
Length of Tube	300 to 5000mm (customize diameter & length)
Hangers	Mara FeCrAl, NiCr 80/20
Flange	MS, SS grade
Thermocouple Pocket	Alumina Tube(ceramic)
Control	Thermocouple, RTD’s, Thermostat

Application Areas

For melting furnace and aluminium holding
In steel industries, for galvanizing furnace
In automotive industries, heat treatment furnace
Annealing furnace
Carburizing furnace