The INDEECO Bolt Heater is Specifically Designed to Provide Maximum Watt Density Rating on the Heated Tube Length

February 2015, MARIETTA, GA –  INDEECO has over thirty-five years’ experience in the design and manufacture of high quality bolt heaters. INDEECO uses the highest quality materials commonly available to manufacture these heaters and maintains rigid quality control procedures to insure a reliable product. Each heater is energized at rated voltage and electrically tested at full heat prior to shipment.

Applications for the Bolt Heaters
INDEECO Bolt Heaters are used to preheat large, hollow holding bolts or studs where a high concentration of heat is critical for bolt expansion in a short period of time. As an insertion type unit, the bolt heater is widely used in the manufacture and servicing of heavy duty steam or other pressure equipment. It is also used to heat die blocks and large platens and to expand adjusting bolts on mechanical or hydraulic presses. In general, most applications attempt to produce an expansion (or stretch) of .0015 inches per inch of 1ength on alloy bolts. This will produce a bolt stress of 45,000 psi at the root of the thread. The portion of the bolting member to be heated, excluding threads, is usually approximately 65% of the total length.

Standard Features

• Alloy sheath swaged tubular construction

• Grade "A" magnesium-oxide filled and swaged

• 80/20 Nickel chrome alloy resistance wire

• Standard 4" octagon electrical enclosure, with knock-outs for easy wiring

• Insulating handle

• Wide range of standard (stock) diameters and length

Optional Features

• Special watt densities, wattages, lengths and diameters available

• Three conductor power leads and plug assemblies

• Two conductor power leads with grounding clip and plug assemblies

• Replaceable element bolt heaters feature cast boxes for convenient screw-in interchangeability

• Flexible Bolt Heaters available

Benefits

• Fast response, large bolts can be heated to full expansion in 15-30 minutes

• May be used in multiples, for uniform heating of matching bolts

Applications for the Flexible Bolt Heaters
INDEECO Flexible Bolt Heaters are designed to allow easy access to stud bolts with overhead clearance restrictions. INDEECO Flexible Bolt Heaters incorporate a time proven design of 50 watts of heat per square inch. The flexible sheath allows the heater to be flexed or bent to almost any required configuration.

Standard Features

• Alloy sheath

• Element swaged to finished size

• Two high-temperature resistance wires Grade “A” magnesium-oxide insulation

Optional Features

• Three prong twist lock plug

Benefits

• A unique “Top Hat” design, retaining plug and cable, help with insertion while preventing unraveling of element.

• A special handle assembly incorporates a 90° offset, which increases the insertion clearance by 80%, allowing easy entry into studs with less than optimum clearance