Matrusree Electro Heats
Hyderabad, Telangana
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Tubular Air Heaters

Creating a niche of Tubular Air Heaters such as Single-Pass Tubular Heater, Finned Tubular Heaters, Custom Built Heaters, Two-Pass Construction Tubular Heaters, Air Duct Heaters, Tubular Heating Elements and many more items at its best, with utmost quality.


Single-Pass Tubular Heater

Single-Pass Tubular Heater
Single-Pass Tubular Heater

Single-pass Tubular Heater offered come with maximum sheath temperature of 620°c and maximum watt density of up to 25 w/in². With choice of moisture resistant terminal enclosure option, these tubular heaters come casted in aluminum metal which makes these provide for broad surface coverage as well as meet the demands of uniform heating. We can also offer these in customized construction options in terms of recommended watt densities, corrosion guide, sheath temperature limitations and other parameters. Some of the applications these are used in include in Plastic industries, for high vacuum applications, for baking, for curing of plants enamels. These can also be factory formed even to small bends of one element tube diameter.

 

Features:

  • Maximum Sheath Temperature: 620°C.
  • Watt density : Max up to 25 w/in²
  • Heating element in Copper (nickel plated), SS304, SS316, SS316L, Incoloy, and Lead/Teflon Coated Sheath Materials.
  • Moisture resistant/explosion resistant terminal enclosure option.
  • Tubular heaters can be factory formed to practically any shape, sometimes to bends as small as one element tube diameter.
  • Magnesium Oxide, MATRUSREE uses only 96% pure MgO, the highest grade available for electric heating elements.
  • Tubular Heating elements may be Bracket Mounted, clamped, Thread Nipple fitted, Flanged, casted into metals, Fitted with terminal box or spaced away from the work as radiant heaters. Elements can also be positioned in ducts or vessels for heating air or other gases.
  • Tubular Heaters can be Finned. see Finned tubular heaters.
  • Available in 0.318" (8.1mm), 0.430" (11mm), 0.551" (14mm), 0.625" (15.8mm), 0.669" (17mm), 0.748" (19mm) element diameter.
  • Several wattage and voltage combinations are available.
  • Easy to install.
  • Excellent internal electrical insulation and heat conduction.
  • Electrically isolated sheath.

Construction:

The cutaway view of a typical MATRUSREE’s tubular Heating element shows its basic construction. A coil of the highest-grade resistance Wire (80% nickel, 20% chromium) is precisely centered in a heavy gauge metal tube while the tube is filled with granular magnesium oxide powder. Terminal pins are Screwed / welded or silver soldered to the resistance coil at each end to provide an unheated length near the terminals and to secure the coil in the magnesium oxide. Through Swaging, the diameter of this assembly is reduced and the magnesium oxide compacted, insuring rapid heat transfer from the coil to the sheath, as well as high dielectric strength. After compaction, the element is processed in one of three Ways:

  • Straight length elements are sealed and appropriate terminals applied.
  • Formed elements are annealed and bent before they are Sealed and terminated.
  • Finned elements are wound with a helical fin before they are sealed and terminated.

Application:

  • In Plastic industries, domestic applications, high vacuum applications
  • Suitable for efficient baking.
  • Curing of plants enamels, lacquers and adhesives.
  • Tubular heaters are cast into aluminum for broad surface coverage and uniform heating application requirements
  • Please refer to general application guidelines, recommended watt densities, sheath temperature limitations, corrosion guide, and other engineering data to assist you with product selection.

Finned Tubular Heaters

Finned Tubular Heaters
Finned Tubular Heaters

Finned tubular heating elements are of the type where the surface area is enlarged by a strip in order to heat gases. At high power the surface temperature is small and the heating element is short. MATRUSREE’s Finned Tubular Heaters are manufactured with the same rugged construction as the standard Tubular Heaters except a MILD STEEL ELECTROPLATED or a corrugated 304 STAINLESS STEEL FIN is helically wound on Heater Tube diameter (304 stainless steel) element. To insure a permanent bond, each end of the fin is fully brazed to the Heater sheath, for optimum heat dissipation and efficiency, as Brazed fins transfer heat at about double the efficiency of unbrazed designs. These heaters are ideal for heating air and select gases in forced and natural convection applications.

Features:

  • Possible Tube & Fin diameters:
    Heater OD: 8.2mm 11.2mm
    Fin OD: 28mm 30mm
  • Stainless Steel (Fin) sheath models are suitable for operating temperatures to 425 °C.
  • Mild Steel (Fin) sheath (Electro plated) models are suitable for operating temperatures to 300 °C.
  • Watt density: Max up to 35 w/in²
  • High Temperature grade magnesium oxide insulation imbeds the resistance wire coil for optimum heat transfer & Dielectric Strength.
  • Mounting fitting available with Standard Bracket or Threaded Nipple arrangement.( Standard and custom options available)
  • Several wattage and voltage combinations are available.

Application:

  • Designed for rapid and uniform heat transfer for forced air heating.
  • Temperature boosting.
  • Channel air heaters for air conditioning and drying apparatus.
  • Industrial Ovens and Cabinets.
  • Duct Heater Assemblies.
  • Resistive Load Banks.

Custom Built Heaters

Custom Built Heaters offered comprise standard tubular Heating elements that can be made available in different bending choices and configuration options to pick from. With maximum Sheath Temperature of 620°C and Watt density of up to 25 w/in², these heaters can be provided with different metal based heating elements like Copper, SS304, SS316, SS316L, Teflon coated sheath material and others as per the specific demands of the customers. Further, these custom built heaters can also be provided in explosion proof/resistant terminal enclosure option. These heaters can be provided with different mounting support including bracket mounting, clamping, thread nipple fitting and other options.

Two-Pass Construction Tubular Heaters

For applications requiring both terminations at the same end, either a U-bent or a two-pass element may be used. Two-pass elements, as shown in the cutaway view, have a U-bent coil inside the sheath and two leads or terminals at one end. Welding or silver soldering seals the opposite end. These elements are available in straight lengths, either finned or unfinned. They can be permanently mounted with a variety of factory-furnished mounting methods. By contrast, standard elements in straight lengths must have a flexible electrical connection at one end to allow for thermal expansion.

Features:

Capable of withstanding much higher operating temperatures than conventional tubular heaters.Avaliable in (15.8mm), 0.669" (17mm), 0.748" (19mm) element diameter.Can be immersed in liquids, for Liquid Heating Applications. Two-Pass Heating Elements can be finned.Several wattage and voltage combinations are available.

Applications:

Inserted in machined holes to heat dies and platens. Multi zone heating. High temperature furnaces. Simulated fuel elements for nuclear reactors. Pressurizer heaters. Dry out heaters in large generators.

Air Duct Heaters

MATRUSREE’s Duct Heaters are constructed out of variety of tubular Heater combinations & inner mountings. While Duct heaters are easily adaptable to many non-pressurized, air-heating systems, they also offer several advantages over gas or oil fired and open coil electric heating units.


Features:


  • Voltage: 230/415 V
  • Watt Densities: Max up top 35W/In2
  • Field Replaceable Heating Elements
  • MgO Insulation filled elements
  • Available in Finned tubular element or (non-finned) tubular heating elements constructions
  • 3½”thichck Ceramic Fiber Insulation keeps wiring cooler and reduces heat loss.Nipples brazed to heating elements can be easily bolted to Duct walls (optional)

Application:

  • Air pre-heating
  • Multi zone reheating
  • Ovens
  • Dryers
  • Hot air blast
  • Space heating
  • Heat pump auxiliary systems
  • Return air heating

 

Tubular Heating Elements

Matrusree electro heats designs and manufactures industrial electric tubular heaters that set the industry standard for excellence. The most versatile of all electric heating elements, the tubular heaters are capable of being formed into virtually any configuration.

Three basic tubular air heaters constructions are illustrated here.

  • (Single-pass) Tubular Heaters.
  • Custom Built tubular heaters
  • (Two-Pass/Single Circuit) Tubular Heaters
  • Duct Heaters
  • Finned Tubular Heaters

Depending on the application different tube diameters and different tube Sheath materials are available. Heating of air requires an oxidized tube surface. The Commonly specified Sheath Materials are SS304, SS316, and SS316L & INCOLOY for high temperature applications. The range of ratings, sizes, materials and terminations available, makes the tubular heater adaptable to many industrial, commercial and scientific applications. All watt ages and voltages are possible as long as the resistance is within the fixed limits and the surface load will not be exceeded.

Features:

  • Maximum Sheath Temperature: 620°C.
  • Watt density : Max up to 25 w/in²
  • Heating element in Copper (nickel plated), SS304, SS316, SS316L, Incoloy, and Lead/Teflon Coated Sheath Materials.
  • Moisture resistant/explosion resistant terminal enclosure option.
  • Tubular heaters can be factory formed to practically any shape, sometimes to bends as small as one element tube diameter.
  • Magnesium Oxide, matrusree uses only 96% pure MgO, the highest grade available for electric heating elements.
  • Tubular Heating elements may be bracket mounted, clamped, thread nipple fitted, flanged, casted into metals, fitted with terminal box or spaced away from the work as radiant heaters. Elements can also be positioned in ducts or vessels for heating air or other gases.
  • Tubular Heaters can be Finned. see Finned tubular heaters.
  • Available in 0.318" (8.1mm), 0.430" (11mm), 0.551" (14mm), 0.625" (15.8mm), 0.669" (17mm), 0.748" (19mm) element diameter.
  • Several wattage and voltage combinations are available.
  • Easy to install.
  • Excellent internal electrical insulation and heat conduction.
  • Electrically isolated sheath.

Tubular Heaters

Tubular Heaters offered can be offered by us in different choices including casted tubular heaters, duct heaters, finned tubular heaters and others as preferred and demanded by the customers. Featuring quality construction standards and providing for durable usage, these heaters find suitability for different industries. Some of the parameters these heaters can be provided in include different tube diameters, tube sheath materials for high temperature application like SS304, SS316, SS316L and others. Further, the choice of different rating options and termination options make these suitable for industrial, commercial and scientific applications.

Specifications:

We offer a variety of basic types of tubular heaters:

  • Tubular heaters
  • Custom built heating elements
  • Casted tubular heaters
  • Duct heaters
  • Finned tubular heaters

Tubular heaters:
are used in different industries as per their features and specifications. Different tube diameters and different tube Sheath materials are available. Heating of air requires an oxidized tube surface.

The most common type of Sheath Materials that is used for high temperature application is:

  • SS304
  • SS316
  • SS316L
  • INCOLOY

The large variety of ratings, sizes, materials and terminations makes the tubular heater useful for many industrial, commercial and scientific applications. If the resistance and the surface load are not exceeded, it can endure all wattages and voltages are possible.

Commercial Heating Elements

Commercial Heating Elements
Commercial Heating Elements

Our commercial heating element converts electricity into heat through the process of Joule heating. Electrical current running through the element encounters resistance, resulting in heating of the element. We use high quality nichrome wire or ribbon as the conductor because nichrome is an ideal material, as it is inexpensive, has relatively high resistance, and does not break down or oxidize in air in its useful temperature range.

Duct Heaters

We are manufacturers of a complete line of electric duct heaters with various physical sizes and kw/btu/h outputs. They mainly are used to boost air temperature for any forced air system.

Application:

  • Additional heat for cold room
  • Temper air temperature for air to air heat exchanger
  • Air source heat pump-rids
  • Ground source heat pump boost / backup.


Matrusree Electro Heats

Mr. Satish Dave (CEO)
No. 3- 133/ 3, Behind Bharath Petrol Pump, Balanagar
Hyderabad - 500037
Telangana, India
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