Process Air Heaters

Custom built, directly or indirectly heated units have efficiencies up to 90 percent. Heaters are custom designed using construction materials to suit the application and engineering parameters. Gas- or oil-fired, electrical or steam heated units are available. Direct units offer airflow to 100,000 scfm max, temperature rises from ambient to 1,000 degrees F (538 degrees C) and process static pressures up to 25 lb. Indirect units offer airflow to 25,000 scfm max, temperature rises from ambient to 600 degrees F (316 degrees C) and process static pressures up to 5 lb. Each unit is prepiped and prewired with custom control console housing as well as safety and operating controls built to NFPA 86, FM and IRI specifications. Simply connect utilities and ductwork to operate.
Corbett Industries Inc.
(800) 442-4028


Thick film heaters and sensors provide heat transfer, thermal efficiency and temperature uniformity in applications where there is a need to save space in a product design. Applications include semiconductor manufacturing, plastics processing, food processing, gas/fluid heating and printing. Features include more direct surface contact to ensure optimum heat transfer, low mass designs, fused termination points and low-profile, compact design. The advanced manufacturing technology allows fine heating patterns for tighter thermal profile tolerances, and the flexible heater circuit design allows for variable heat output.
Chromalox Inc.
(800) 443-2640


Watt-Flex are available with an outer groove to accommodate a movable needle-type thermocouple for accurate sensing and control in temperature-critical processing applications up to 1,700°F (927°C). The split-sheath cartridge heater's continuous-coil design produces uniform temperatures along the heater sheath, which contracts to ease removal from bores and sleeves when the heater is de-energized. The heaters are offered in 14 standard diameters and lengths from 1.25 to 72" as well as custom sizes and ratings.
Dalton Electric Heating Co. Inc.
(978) 356-9844


Rugged and resistant to moisture and chemicals, the heater is thin and flexible to allow it to be used in flat positions or wrapped around curved and irregular shapes. With a maximum operating temperature of 450 degrees F (232 degrees C), the heater can incorporate thermostats, thermistors and sensors into its design.
Technical Heaters Inc./Thermolab
(818) 365-9435


Built for use in the printing industry, thermal fluid heater is a helical coil design and has an output of 9.4 million BTU/hr. In addition to its helical coil, the heater has two heat exchangers. The first preheats combustion air to the burner. The blower for the heater's burner forces combustion air through open spaces inside hollow plates in the plate-type air-to-air exchanger. Exhaust gases pass along the outside edges of the plates, transferring heat to the combustion air. The second heat exchanger is used for preheating thermal fluid before it enters the helical coil. Thermal fluid enters the exchanger, a finned-tube convection section, and is heated by convective heat from hot exhaust gases. The two exchangers increase the heater's efficiency to 91.5 percent LHV. Both exchangers are mounted in the heater's exhaust stack.
(800) 235-5200


DryIR Model 6040 can concentrate infrared heat directly to the desired area, resulting in immediate evaporation. It is designed for drying applications that require a clean, responsive, noncontact heat source on target areas up to 4”
(102 mm) wide. It is suited for water- and solvent-based drying as well as adhesive curing. The infrared energy emitted from each heater can be adjusted to match the specific heating requirements.
Research Inc.
(952) 941-3330


Designed for oil preheating, oil baths and other heat transfer fluids, oil immersion heaters have a tubular heater design while fintube heaters include an aluminum flange welded to longitudinal finned tubing. Fins increase the surface area, lowering the watts per square inch and enabling a higher kilowatt rating to be used in a shorter length.
Trent Inc.
(215) 482-5000


Air-heater program for industrial hot air applications includes LHS Classic, LHS Premium and LHS System. All three LHS (Leister Heat Sources) lines include integrated device and heating element protection from excess temperatures. The new air heaters offer big performance from small dimensions. All three come in different power classes and are compatible with the existing range of the company's blowers and nozzles. The LHS Classic products are used where temperature regulation is not required or where external sensors and electronics are used for control. The LHS Premium devices include an integrated probe, temperature regulation and power electronics, ensuring a high level of process reliability. Temperature is continuously adjustable by means of a potentiometer. The LHS System units are integrated air heaters that can be externally configured and monitored. Probe, temperature regulation and power electronics are integrated.
Leister Process Technologies
(011) 41 41 662-7474


Hydroheater is an efficient heat transfer device for heating water-miscible liquids, slurries and process fluids. Benefits include reduced energy and steam consumption; improved production and process time; and reduced maintenance downtime. Accurate to +/-0.5 degrees F, the heater provides precise temperature control and flow rates up to 5,000 gal/min. Offered in a range of alloy materials and sizes from 0.5 to 12" outlet piping, the direct steam injection heater has high solids capability. If a product is pumpable, it can be heated with direct-steam injection heaters. High velocity mixing and internal modulation of steam provide smooth, stable operation, enhanced steam and liquid flow turndown. Discharge temperature of liquid or slurry responds instantly to instrument signal input.
Hydro-Thermal Corp
(800) 952-0121


For direct-fired gas-heating applications, these heaters provide high temperatures without air preheat in a packaged design. The heaters come in sizes to 25 million BTU/hr for applications such as air separation, fuel gas heating, regeneration gas heating, steam superheating and other vapor-phase, direct-heating processes.
GTS Energy Inc.
(770) 801-8884


Model FBA has all of the characteristics of the company's F-Series along with holes drilled in the heater face to allow for forced air. The purpose of the forced air is to either protect sensitive material, improve drying or to provide combination infrared/convection heating.
Solar Products Inc.
(973) 248-9370


Designed for maximum temperature, heat transfer and heater life, the 0.125” Superwatt optimizes heat transfer from the resistance wire to the sheath. Suitable applications include dies, plastic molding, instrumentation and packaging machinery.
Hotwatt Inc.
(978) 777-0070


Cast-in heaters have liquid- or air-cooling options and primarily are used as a high performance heating and cooling source for plastics extruder barrels. Constructed of aluminum or bronze alloy, the cast-in heaters utilize a tubular heating element, uni-formed for heat distributed evenly throughout the casting. The inner diameter is precision machined for an exact fit to the exterior barrel. Various termination options are available for extrusion applications, including stud terminals with ceramic insulators, stainless steel armor cable or explosion-proof housings. Cooling tube terminations include compression fittings and cast-in threaded fittings for quick installation. Shroud assemblies with blowers are available for air-cooled fin designs.
Durex Industries
(847) 639-5600


Standard indirect gas-fired heater systems are more than 80 percent thermally efficient and capable of a 150 degrees F (65 degrees C) temperature rise with a 600 degrees F (316 degrees C) maximum discharge temperature. Process flow can be once-through or recirculated gas. Predesigned for Maxon Ovenpak burners, the heater system can be provided as a stand-alone heater or integrated into a fully packaged system with fans, motors, filters, bypass, controls and other components.
Des Champs Technologies
(540) 291-1111

Thermal Fluid Heater

Designed for high temperature industrial process applications, Twin-Coil HYT heater has two close-wound helical coils to provide thermal efficiency in a compact package. The internal use of a ceramic fiber blanket in place of cast refractory reduces weight and maintenance. Built with a rugged design, it is suitable for use with a range of fuels and thermal fluids.
General Combustion Corp.
(407) 290-6000

Infrared Heater

Infraround Series is a medium-wavelength infrared emitter composed of long-life elements mounted to proprietary ceramic cylinders. Designed specifically for the wire and cable industry and for curing extruded rubber and synthetic shapes, the heater can be mounted horizontally or vertically and can be stacked end to end, and it has intermediate exhaust ports. Unit is available in diameters from 2 to 10".
Process Thermal Dynamics
(800) 793-2077

Electric Strip Heaters

Manufactured under the Caloritech brand, line of electric strip heaters is suitable for process applications such as surface heating on platens, dies, molds, presses, tanks and piping as well as process air heating in drying cabinets, baking ovens and vacuum dehydrating ovens. Heaters can be provided with fins to improve heat transfer in air-heating applications. They are corrosion resistant, able to withstand severe vibration conditions and provide uniform heat distribution over the entire active surface.
CCI Thermal Technologies Inc.
(800) 410-3131


Flanged heaters are manufactured in more than 4,300 configurations with capacities from 1 to 1,200 kW. Each configuration is available in NEMA 12, 4 and 7. Used to heat air, gas and aqueous solutions, the heater is supplied with up to a 36" dia. flange. The immersion length ranges from 9 to 180" long.
Gaumer Process Heaters
(800) 460-5200


Explosion-proof pipe-thread immersion heaters are CSA approved for use in hazardous areas classified as Class I, Division 1, Groups B, C and D, and Class II, Division 1, Groups E, F and G. Heaters are provided with 304 stainless steel fittings and elements suitable for NEMA 3 and corrosive environments. Construction features include 2 or 2.5" NPT fittings, 0.475" dia. compacted tubular elements, repressed U-bends, nested third element with spacer for structural strength and either a 0 to 100 degrees F (-17 to 38 degrees C) or 60 to 250 degrees F (15 to 121 degrees C) process thermostat. They are designed to be permanently mounted in a horizontal position above the anticipated sludge level and are approved for operation in a maximum ambient temperature of 104 degrees F (40 degrees C).
(314) 644-4300


Process gas coolers and heaters provide transitions on both ends to mate to process piping. Each transition is customized to properly distribute air across the finned tube bundle and minimize pressure drop. Removable-core design allows heat exchange elements to be cleaned or inspected in a minimal amount of time.
Aerofin Corp.
(434) 845-7081


PTC heater design simplifies the connection between the PTC element and the medium to be heated. With the single-sided heater design, the bottom side of the thermistor element is isolated electrically from the top side but heat transfer is not affected. PTC elements can be soldered, epoxied or spring-mounted to its interface. It is self-regulating when operated above its switch temperature.
Advanced Thermal Products
(814) 834-1541


Consisting of a standard 150 or 300 lb flange for mounting as well as the company's drywell, low density heating elements, heater is designed for tanks, large vats and reservoirs. The drywells allow the elements to be serviced or replaced without draining the tank, reducing downtime. Low watt density keeps the element sheath temperature low, thereby reducing the chance of coking or heater buildup. The flange and heater tubes are constructed of mild or stainless steel, depending on the application.
Process Heating Co.
(206) 682-3414


A quiet, quick alternative to a heat gun, Glo-Ring heat tool is suited for shrinking lengths of heat-shrink tubing onto cable assemblies and wire harnesses. It focuses infrared heat onto the work piece with temperatures up to 1,500 degrees F (815 degrees C). Heat intensity is adjustable to suit various applications. Quartz heating elements and custom element configurations are available.
Eraser Co.
(315) 454-3237


Complete fuel-fired three-pass low pressure hot oil heating system provides temperatures up to 750 degrees F (399 degrees C). Offered in sizes ranging from 400,000 to more than 75 million BTU/hr, efficiency can exceed 90 percent. Heating applications include presses, rolls, tanks and reactors, kilns, dryers, fuel heating, glycol solutions, process air and steam generation.
Thermal Fluid Systems Inc.
(770) 425-5556


Offered in a range of rates, sizes and materials, flanged immersion heater is adaptable to the heating requirements of water, oil and other liquid solutions as well as air and gases. The heater is designed for through-the-side mounting in tanks and vessels using standard pipe flanges.
Heatrex Inc.
(814) 724-1800


FiberGas-II Matrix can be used in drying and curing applications such as curing coated electrodip galvanized strips of various widths, thicknesses and web spreads with a maximum line speed of 300 ft/min. The curing system includes a control system for closed-loop control and cut-off zones. Burner is designed with a high temperature alloy matrix panel that provides even distribution and proper air fuel velocities. It achieves 48,000 BTU/ft2-hr, reaches 90 percent power from cold startup within 10 sec and shuts down from 90 percent power to cool to touch in 10 sec.
Casso-Solar Corp.
(800) 988-4455