Flat Coil Heaters-Custom Coil Heaters

Flat Coil Heater-2.5 x 3.2 mm Flat Coil Heaters Flat Coil Heater-Pressed in Brass


National Plastic Heater’s flat coil heaters set the standard with respect to precise fit and profiling to optimize the performance of nozzles and other mating components. Available with or without internal thermocouples -Type J or Type K. At 2.5mm(.098”) in height, the NPH flat coil heater can accommodate today’s design objective of placing nozzles closer to waterlines and minimizing material usage. With a superior width of 3.4mm (.134”) surface contact is maximized resulting in less required heated length and more watts per linear inch.


National Plastic Heater, Sensor and Control offers a wide range of performance enhancing options including:


  • Outside sheath to improve heating efficiency
  • Inside/Outside sheath with sealed end rings to prevent contaminates shortening heater life
  • Embedding in brass to create high thermal mass surrounding the heater improving high temperature performance and heater life
  • Moisture resistant transition head
  • High temperature lead and potting options
  • Flexible cold section
  • Wide variety of standard and custom lead exit options

National Plastic Heaters, Benefits and Advantages:

  • Custom wound from straight stock for same day shipments
  • Flexible cold section
  • Higher watt density than a cable heater
  • Resistance wire centered for more repeatable heat profile
  • Sealed transition head for moisture resistant applications available
  • NPH can wind coil heaters from stock and ship same day or build to order in 7 business days


Technical Specifications:


  • Thermocouple: Integrated type J or type K
  • Profile: 2.5mm(.098”) Thick X 3.4mm(.134”) Wide
  • Maximum Sheath Temperature: 1382 deg. F
  • Sheath Material: Cr-Ni Steel
  • Maximum Total Straight Length: 3000mm (118.11”)
  • Length Tolerance: Heated +/-1%; Unheated +/- 2.5%
  • Maximum Voltage: 250VAC
  • High Voltage Stability: 800 VAC
  • Wattage Tolerance: +/-10% (contact hotset for special)
  • Minimum Bending Radius: 8mm(.315”)
  • Watt Density: 38.7 Watts/In2
  • Insulation Resistance: >=5M Ohm @ 500 VDC (cold)
  • Leakage Current: <= 0.1mA @ 253 VAC (cold)
  • Length of Unheated Zone: 65mm(2.56”); 25mm(1.00”) Transition Head
  • Standard Connection from Stock: 48” Teflon Leads.


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