Electric Heater Insulation Sleeve Selection: Improving Heat Resistance and Service Life

Published: October 12, 2026 | Category: Application Case

Customer Background: A home appliance manufacturer in Southern China producing electric kettles and heaters. They previously used PVC insulated wires, which had issues with aging and cracking under long-term high-temperature operation.

Problem Analysis:

  • Operating temperature: 180-220°C (PVC heat resistance limit: only 105°C)
  • Service life: Average 8-12 months before replacement needed
  • Safety risk: Insulation damage may cause short circuits

Solution:

We recommended FGB series fiberglass sleeving (specification: ID 6mm × Wall thickness 1.5mm):

Parameter PVC Sheath FGB Fiberglass Sleeving
Temperature Range -20~105°C -60~550°C
Insulation Class Class B Class F (155°C)
Expected Life 8-12 months >3 years
Unit Price $0.11/m $0.35/m

Results:

  1. After 3-month field testing: no deformation or discoloration observed
  2. Product lifespan increased from 1 year to over 3 years
  3. Although unit cost increased by $0.24, after-sales repair rate dropped 90%

Selection Recommendation:

For electric heating applications, we recommend self-fusing fiberglass sleeving:

  • Easy installation: spiral winding without tools
  • High flexibility: adapts to various bending angles
  • Reusable: convenient for maintenance

💡 Technical Consultation: For specific specifications or samples, contact our technical team:
📧 [email protected] | 📞 +86 180 2224 0398

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