Marathon Heater Headquarters - United States

Marathon Heater, Inc. was founded in 1996, with 3 employees and one product, cartridge heaters. Our commitment to customer service and engineering support has brought rapid growth. In 2002 we were selected by Inc. magazine as one of the 500 fastest growing privately held companies in the United States. Marathon currently has 3 manufacturing locations, our 40,000 square foot headquarters in Del Rio, TX, a 40,000 square foot division in Brownsville, Tennessee, and a 12,000 square foot manufacturing facility in Udaipur, India to service our eastern hemisphere customers.

Marathon Heater, Brownsville, Tennessee - United States

Marathon Heater - India
Marathon Heater Inc. has combined efforts with Tempsens Instruments, which is the largest temperature sensors manufacturer in India with over 35 years experience in temperature measurement. Both together started a new company; Marathon Heater (India) Pvt. Ltd. with a 50:50 percent partnership to manufacture high quality Industrial heaters , such as Cartridge heaters, Nozzle heaters, Air heaters, Silicon Rubber heaters, Band Heaters, Coil heaters and other heating elements in India as well as overseas market.

Marathon Heater (India) Pvt. Ltd is equipped with highly sophisticated machinery and equipment, imported from the US, to meet the high quality standards and specifications required by our customers.

Whatever your heating requirement, Marathon Heater has a solution.

Air Heaters 

Marathon air heaters feature an open coil of high temperature resistance wire electrically isolated in a stainless steel sheath. Because the air being heated passes directly over the resistance wire, maximum heat transfer efficiency is achieved. Marathon brand air heaters are used for heat staking, plastic welding, laminating, drying, heat sealing, and any other operation where air needs to be heated up 1000° F.

1/2” and 3/4” diameters are standard with other sizes available. Several 1/2” diameter air heaters are in stock for same day delivery. Options such as male and female fittings for inlets and outlets, thermocouples to monitor outlet temperature, and pin connectors are available.

Specifications

Industrial Band Heaters

• When heating is required around a nozzle or a pipe, a band heater is the optimal solution for your heating needs.

• Our current band products are separated in two types: Mica Band Heaters, and Ceramic Band Heaters.

• Each type offers different temperature tolerances, as well as flexibility and construction options.

Mica Band Heater

Ceramic Band Heater

Nozzle Heaters

Marathon Heater's Hotrod swaged cartridge heaters are the industry standard.

•  

  Designed and manufactured for temperatures up to 1600°F.

• Choose from one of our thousands of in stock models, or let our engineers design a custom heater for your application.

• Also available at a lower cost non-swaged versions.

Standard Hotrod Features

When highly focused heat is required, and a very low profile is imperative, coil heaters are the best cost-effective option.

Coil heaters may be used to concentrate the heat on specific segments, or the coil may be spread to equalize the temperature across the object to be heated.

Marathon Viper Coil Heater Standard Features

• Flexible Teflon lead wire.
• Available with or without internal thermocouple.
• 1/8" x 1/8" element cross section.
• Ground Wire
• 36" Stainless steel braid over leads.

Kamlrok  Disc Heaters

General Description

These unique heaters are constructed or a rust-resisting iron sheath (750°F Max Temp.) with optional chrome steel sheaths (950° F. Max Temp.) available. They are precision pieces of equipment proven to be suitable for continuous duty applications. Heater reliability is assured by high quality nickel-chromium resistance wire, which is embedded in a special ceramic formula developed for long life with excellent heat conductivity. This refractory insulation is compressed and the cured in high temperature ovens to insure maximum quality.

Typical Applications

The primary application of ring & disc heaters is the heating of flat surfaces: tank bottoms, melting pots, hot plates, platens, dies, molds, coffee urns, vacuum pumps (diffusion pumps), incubators, vulcanizers, ovens and resistive load banks.

Installation

Ring & Disc heaters should be clamped firmly to the application surface. Small diameter disc heaters can be nested inside larger ring heaters to increase heating capacity. Center holes of all heaters accommodate positioning of the heater & facilitate mounting to threaded studs welded to the surface to be heated. Utility clamps are positioned over the heater and bolted down upon the threaded studs. The studs can also be through bolted vs. welded. Tighten clamps wrench tight and the back off 1/2 turn for expansion.

Good contact is essential for top efficiency

When the application requires heating of a permanent, fixed surface, and any air gap between the heater and this surface will greatly reduce the heater efficiency, and will develop hot spots on the heater surface that are detrimental to its life & serviceability. Heaters should be clamped firmly to the heated surface so that they cannot readily "expand away" from this surface.

Tolerances

Resistance wire is precision wound.

O.D. Tolerance on all ring heaters is 1/16 inch under nominal size 1/64th.

I.D. Tolerance on all ring heaters is 1.16 inch over nominal size + 1/64th.

Thickness is 5/16th inch +/- 1/64th.

Terminals

On all ring heaters, they are located 5/8ths from the outside edge of the radius of the heater. Standard terminals are made of cold rolled steel and oxidized in a controlled atmosphere to keep them from rusting. Terminal thread size is 8-32. All ring heaters are dished 1/2 degree from the center to the outside edge. This makes good contact possible when heaters spring down tight on the surface to be heated.

Dished Adapter Washers

Dished adapter washers are available for the 9/16 inch I.D. units ONLY. These washers are 304 Stainless Steel 25/1000 thick 13/16th O.D. with center hole to convert to a #10-32 screw mounting hole.

Options

All sizes are available without center holes (Blank). No three heat under 3" O.D. 3 Heat rings (3 Terminals) which divide the total wattage into two equal circuits for a 3 heat switch (1/4, 1/2, or full power application). Dished heaters curved to fit convex surfaces, with the following radii: 3/16, 1/4, 3/8, 1/2, 7/8, 1 1/8, 1 1/2, and 2. Over 250 volts available, 120 and 240 volt are standard. Nickel plated terminals are available.

Refractory Strip Heaters

General Description

The Marathon Heater refractory strip heaters are ideal for fast heat dissipation as in convection heating, process ovens, and dryers.

Double channel sheath provides rigid unit resisting warpage. The sheath is made with rust-resisting iron for temperatures not exceeding 750°F and chrome steel for temperatures up to 1200°F.

Each heater consists of coiled nickel-chromium wire, properly centered and imbedded in a high grade refractory material (special ceramic formula) which insures good insulation and rapid transfer of heat.

Uses

General purpose heaters for use in drying ovens, clamp-on water heating, warming ovens, ink drying, crane cabs, plastic mold heating, core baking ovens, valve houses, pipe lines, process welding and process ovens and dryers, incubators and preheating.

Uniform heat transfer, low cost, long life, suitable for tailoring to many commercial and industrial applications.

Complete line from 6" through 43" (all fractional inch lengths available), high and low temperature, common voltages from 120v to 550v.

Staggered Terminals

Heaters are available with terminals located at both ends or with both terminals at one end. In the latter case, the terminals are staggered to allow ample clearance for bus bars pr for connectors to be taken off the end or either side. Terminal leads should be steel, nickel, or monel metals.

Strip heaters of special ratings and lengths can be supplied to meet unusual conditions. Please contact Marathon Heater to find a solution to your unique application.

 Silicone Rubber Heaters

 Silicone Rubber Heaters offer a very high watt density while maintaining flexibility. Good heating drums, de-icing vending machines, atms, aircraft, cars, and maintaining warm medical equipment for the patients comfort, such as CAT scanners.

• Marathon Heater flexible heaters provide outstanding performance in applications up to 450°F.
• Design versatility permits special heat profiles,complex shapes and installation on a variety of surfaces.
• They are not affected by vibration, flexing, or repeated mechanical shock.
• Silicone rubber has a high dielectric strength, is non-toxic, and flame retardant.
• Perfect for heating 55 gallon drums.

 Starflex Band Heaters

General Description and Construction

The Marathon Starflex band heater is an extruded aluminum segmented band employing rugged refractory insulated tubular heating elements. The low expansion clamping band provides snug barrel fit and and assures excellent heat transfer through the entire operating temperature range up to maximum heater temperatures of 600°F. This band heater enjoys wide acceptance because of extremely long and reliable life characteristics. Operators of plastic extruders and injection molders experience minimum down-time with the Starflex band. It is also one of the most efficient band heaters available.

Some applications require both heating and cooling. With the advent of exothermic materials and heat generated by screw rotation, the proven Marathon Starflex band heater was adapted to provide both heating and cooling functions. Cooling tubes are placed in proximity to the heating elements to produce the Marathon Starflex Heat/Cool band. Due to its low mass, it can be cooled relatively quickly.

Marathon also manufactures cool only bands in a configuration similar in a configuration similar to the Heat/Cool band. It should be noted copper cooling tubes may be used for operating temperatures up to 350°F but temperatures above 350°F require the use of our stainless steel cooling tubes.

Installation of these bands is easily performed by opening the band, placing it around the cylinder and tightening a single screw. Large diameter bands are furnished with multiple clamping assemblies and multiple segments from grasping the surface.

Cool or Heat/Cool Bands

You may use copper cooling tubes for operating temperatures up to 350°F. Stainless steel cooling  tubes must be used for operating temperatures above 350°F. Please specify when ordering.

• Mica Band heaters offer a low profile option for applications of up to 1200 °F.

• Ceramic Strip heaters offer a rugged construction for application of up to 1200 °F. They are direct bolt in replacements for popular brands.

Mica Strip Heaters

Ceramic Strip Heaters

Thermocouples

• Low cost industrial thermocouples and RTDs are availble in a variety of configurations an types. Types J, K, T, 2 wire, and 3 wire RTDs are standard.

• Other types are available. Marathon has a large inventory of stock thermocouples for immediate delivery.

Marathon Heater is now a distributor for HotSet  flexible tubular heaters.

HotSet flexible tubular heaters make the heating of complex platens, shapes, and machines, possible. The HotSet flexible tubular heaters  are completely flexible, and may be shaped at will. Around pipes, along platen paths, and other challenging shapes. Excellent replacements for traditional tubular heaters, which are not flexible and most be custom made in most cases.

General description and construction.

Tubular elements are the most versatile of all metal sheathed heaters. They can be supplied in many lengths, diameters, sheath materials and electrical ratings. Inherent mechanical flexibility permits forming and bending into many shapes and sizes providing unique adaptability for the process engineer or product designer. Various sheath material selections are available to provide suitable operation from liquid immersion service through high temperature (1600 °F) radiant heating service.

Typical Applications

The versatile tubular heater is widely used in a variety of ways for industrial processing such as liquid immersion (with threaded fittings), in free air, clamped on, wrapped around, cast into aluminum, bronze or cast iron. They may also be installed into machines grooves or drilled holes in metal parts.

Sheath Temperature Recommendations

For maximum life, tubular elements should be operated within the limits listed in the chart, and lower watt density if higher temp. Watt density should be a function of the application. We can also manufacture any size in between fractional lengths.

Threaded Fittings

Threaded fittings can be supplied mounted on the terminal ends of tubular elements. A gasket washer permits liquid tight installation in tank walls for immersion heating of water, oil, and other liquids. Watertight gasket and lock nut are included.