Low watt density cartridge heaters
Heaters India tubular heaters are the most versatile and widely used source of heat throughout the industry, for commercial, industrial and scientific heating applications. The Basic construction of a tubular heater - it is a helical coil of nickel chromium alloy wire, precisely centered in a metal tube.
Surrounding the coil is the best combination of electrical insulator and heat conductor Magnesium Oxide. After the tube is filled with MgO, it is compacted by rolling or swaging. This elongates the tube, thickens the wire and compresses the MgO into rock hard mass.
The coil is thus permanently stabilized in the centre of the tube where it will not shift during the bending process; the circular cross section with its even distribution of the forces of expansion offers the best combination of life, thermal conductivity and die-electric strength.
The wire element is precisely wound round a refractory former which is inserted in a SS sheath and finally compacted.
Sheaths ground to close tolerance limits.
Type 316 material available for special applications.
Suitable for horizontal or vertical mounting.
Minimum temperature differential between element and sheath ensures optimum heat transfer.
Welded end disc standard on 3/8” diameter and above lead end may be sealed in addition.
The heater is formed by a helical coil of resistance wire supported by high quality refractory formers and housed in tubular sheath. Brass or SS sheaths manufactured from closed tolerance tubing for optimum heat transfer in reamed holes. May be supplied fully sealed to prevent ingress of moisture or foreign matter. Ends, assembles with fiberglass / PTFE covered Copper leads Standard alternation insulation and mechanical protection can be specified: plain or screwed flanges may by fitted Made in 3/8”, ½”, ¾” and 1” nominal diameters with lengths from ¼” upwards (and metric sizes) Special purpose heaters are available for vertical mounting or for limited vibration, and are suitable for immersion. Voltage: 110 to 125 volts, 220 to 250 volts and special low voltage heaters like 12v and 42v. Normal maximum operation temperature for brass sheaths 3000C (for stainless steel sheaths 3500c) but subject to application.
Used for heating platens, moulds, dies, refrigeration equipment, packaging machinery, sealing & marking heads, reprographic equipment, air/ gas heating and immersion heating
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