Cartridge Heaters

LOW DENSITY CARTRIDGE HEATERS

HEATTEC Low Density Cartridge  Heaters are also made of helically wound nickel chrome resistance evenly stretched and placed in ceramic insulators. It is then placed inside Brass or SS 304 tube. Magnesium oxide powder of high quality is filled inside the ceramic conductors. This would help to increase the thermal conductivity, dielectric strength and heater life.

Features

  • Low watt density heaters are available in brass or SS 304 sheath.     
  • Medium & High watt density heaters are available in SS 304 sheath.
  • Braided Wire, straight or right angle exit.
  • Uniform surface temperatures.
  • Flange type optional Braided wire.
  • Max temp for SS tube 400oC, for Brass tube 200oC.
Applications    
  • Processing machinery.
  • Injection and Blow Moulding.
  • Hot runner bushings.
  • Packaging machinery.
  • For fastening of turbine bolts .
  • Extruders.
  • Hot plates, moulds & dies .
  • Food processing machinery
  • Medical Equipments
  • Shoe Machinery
Mounting Bore
To increase the life of the heater, the clearance between the heater and bore diameter should be less. The inner diameter of the hole can be between 0.15mm and 0.30 mm larger than the cartridge diameter.

Size
  • Diameter -  Min 8mm to Max 45mm
  • Length  - Available in any desired length
  • Max watt density 3.5 watt/sq cm.
  • For higher wattage and high temperature we recommend high watt density cartridge heaters.
Terminals
  • Available in Teflon wire, fiberglass wire and nickel chromium wires. Insulated with ceramic beads or fiber glass sleeves.
  • From Dia 22mm onwards, screw connections are available
  • Send drawing or samples for any specific configuration
  • Fibre glass or tefflonwire crimped or welded to terminals.
When Ordering please Specify :
  • Type of heater
  • Wattage and Voltage
  • Dia & length of the heater
  • Drawing for special type configuration
We can manufacture and supply any intermediate diameter and length, Send drawing or sample for special size.

HIGH DENSITY CARTRIDGE HEATERS

HEATTEC High Watt Density Cartridge heaters are made of quality raw materials and advanced manufacturing process that ensures reliability in heavy duty working conditions like plastic processing, printing, packaging and automobile industries where the heaters are subjected to heavy vibrations. The perfect installation of the cartridge heaters facilitates good heat exchange between the surfaces of heater and mass to be heated thereby increasing the life of heater.

Applications   

  • Plastic processing machinery
  • Hot runner mould
  • Packaging machinery
  • Dies & moulds
  • Shoe machinery
  • Labeling machineries and a lot of other applications.
  • Food processing machinery
  • Hot Stamping
  • Heating gases and liquids.
Features
  • Sheathing material : SS 304 and SS 316
  • Available with inbuilt Thermocouple 'J' or 'K'
  • Maximum sheath temperature 800oC
  • Rugged & durable construction
  • Highly compacted construction improves heater life and reduces the effect of vibration and shock.
  • Excellent heat transfer.

Mounting bore clearance:
The gap between the heater O.D and the bore I.D should be very close.

To determine Fit :

Fit = Largest hole I.D - Min heater O.D
Ex: Heater O.D = 12.5 mm (± 0.06mm std. tolerance)
Hole I.D = 12.6 mm (± 0.02mm hole tolerance)
Min heater O.D = 12.44 mm
Largest hole I.D = 12.62 mm
Fit = 12.62 - 12.44 = 0.18 mm (max permissible clearance)

Refer Operating temperature Vs Watt density graph to find max permissible clearance.
 
Dia
mm
6.5
8
10
12.5
16
19
25
inch
1/4
5/16
3/8
1/2
5/8
3/4
1
     




 

 Length
Min mm
35
35
40
40
50
60
75
Max mm
250
250
500
500
1500
1500
1500

Terminals

  • Fibre glass or Teflon wire crimped or welded to terminals
  • Fibre glass wire with SS metal braiding
  • Wires protected with SS or GI flexible conduits
  • All wires are available in straight or right angle exit
  • Drawing or sample required for special type terminals

SPLIT TYPE CARTRIDGE HEATERS

HEATTEC Split Type Cartridge Heaters are developed for high temperature applicationa. Helically wound resistance coli is placed inside the tube filled with MgO powder and compacted for faster and efficient heat transfer.

Features

  • Excellent heat transfer.    
  • More clearance can be provided for inserting split type cartridge. Heaters compared to standard conventional cartridge heaters.   
  • Can be inserted and removed easily.  
  • Longer life.    
  • Uniform heat transfer.    
  • Available in SS304 SS316 sheaths.   
  • Hot zone up to the tip of the element.

Applications

  • Plastic Processing & Packaging Machinery
  • Injection & Blow Moulding
  • Extruders
  • Foundaries
  • For fastening of Turbine Bolts
  • Soldering pots

When ordering please specify

  • Dia & length of the heater
  • Wattage and voltage
  • Type of terminal
  • Drawing for special type configuration

Available Dia: Mm 6.5 8 10 12.5 14 16 19
Length(mm) Min 40 40 40 50 75 75 100
Max 500 600 900 1500 1500 1500 1500

We can manufacture and supply any intermediate diameter and length, Send drawing or sample for special size.

Top

 


WATT DENSITY vs FIT SIZE FOR CARTRIDGE HEATERS

The life expectancy of cartridge heaters largely depends on the operating temperature of heater, control system and fit size. Select optimal fit size for installing cartridge heaters for heating metal parts referring(table).

TYPES OF TERMINALS FOR CARTRIDGE HEATERS

 
 

CERAMIC CARTRIDGE HEATERS

HEATTEC Ceramic Cartridge Heatersare made of helically wound resistance coil stretched and stung through series of open type ceramic insulators. While the SS 304 rod centrally supports the elements, SS 316 or SS 310 rods are used for high temperature applications.
Features:
  • Nickel Chrome / kanthal resistance wire
  • Available in Dia 26 mm to and Length upto 3000mm
Surface watt density:
  • For oils - 1.4 to 4 watts / cm2
  • For wter - 1.4 to 8 watts/cm2
  • For Metals - 2 to 5 watts/cm2
  • For air 1.6 to 3.2 watts/cm2

Applications:
  • Heading Liquids & gases
  • Dryers
  • Ovens
  • Printing Machinery
  • Packing Machinery
When ordering please specify:
  • Dia & length of the heater
  • Wattage and Voltage
  • Type of terminal
  • Cold zone length & hot zone length

 

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