Square Cartridge Heaters

 

For those applications where a drilled hole is not practical, Marathon Heater offers square cartridge heaters. Unlike other manufacturer's square cartridge heaters, Marathon's square cartridge heaters are swaged, allowing them to be used in high temperature and high watt density applications.

Square heaters are ideal for milled slots in long platens where drilling a long hole would be too difficult. Square heaters are also much easier to remove from a slot after extended high temperature usage than removing a round heater from a drilled hole.

square heater 00

square heater 01

Marathon square cartridge heaters are available with a wide variety of options:
 

 

square heater 02

  
square heater 04
  • Right angle leads
  • Stainless steel braids
  • Stainless steel flexible conduit
  • Internal thermocouples
  • Teflon end seal
  • Epoxy end seal
  • Silicon rubber end seal
  • Tab stops, flanges, weld beads, etc.
  • Special wattage profiles
 square heater 03

 

Technical specifications:
 


 		 3/8 ½ 5/8
Max cross section .374 .499 .624
Min cross section .369 .494 .619
Std. Lead wire gage 22 22 18
Maximum amps with std. Lead wire 9 9 15
Max lead wire gage 22 18 18
Max amps with large gage lead wire 9 15 15
Maximum volts 300 300 300
Lead wire temperature rating 550°C 550°C 550°C


Maximum recommended watt density
 

Clearance (Inches)

Temperature °F
1200° 1000° 800° 600° 400° 200°
0.002 105 200 225 225 225 225
0.003 90 150 220 225 225 225
0.004 75 130 160 225 225 225
0.005 65 105 150 210 225 225
0.007 50 75 110 150 175 225
0.010 45 65 80 110 150 170
0.015 35 55 70 80 105 120
0.030 30 45 60 65 75 80
0.060 20 30 35 40 45 50
0.100 15 25 30 35 35 35

When using heaters in an open slot (ie. One side of heater exposed to open air), use figures 30% less than these.

 

 
    Click for manufacturers detail
 
  Back To Cartridge Heaters Get A Heater Quote Site design by CLC Data Services