HTG Heat Treated Sleeve

HTG Heat Treated Fiberglass Sleeve | High-Temperature Electrical Insulation Sleeve

HTG Heat Treated Fiberglass Sleeve is a high-performance, uncoated insulation sleeve designed for extreme high-temperature applications. It is manufactured from woven non-alkali fiberglass yarn and subjected to a special heat-treatment process, which removes organic residues and enhances thermal stability, flame resistance, and dielectric performance.

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HTG Heat Treated Fiberglass Sleeve | High-Temperature Electrical Insulation Sleeve

This sleeve is capable of continuous operation in temperatures ranging from 400 °C to 600 °C, making it suitable for environments where conventional coated sleeves are not effective. Its inorganic fiberglass construction ensures excellent flame retardancy, flexibility, and electrical insulation, even under prolonged thermal stress.

HTG heat treated fiberglass sleeves are widely used for un-insulated or partially insulated conductors, bus bars, component leads, cable assemblies, and electrical components exposed to high temperatures. They are ideal for industrial heating equipment, high-temperature electrical systems, and applications requiring reliable insulation without organic coatings.

Product Details

Product Name

HTG Heat Treated Fiberglass Sleeve

Insulation Class

High-Temperature (Inorganic Insulation)

Working Temperature

400 °C – 600 °C

Material

Woven Non-Alkali Fiberglass

Insulation Type

Uncoated Heat Treated Fiberglass Sleeve

Size Range

Available in multiple inner diameters

Color Options

Natural, Red, Black, Grey (others on request)

Typical Applications

Bus bars, conductors, component leads, electrical assemblies

End Use Industries

Electrical, industrial heating, high-temperature equipment

Technical Data – HTG Heat Treated Fiberglass Sleeve

Item	Technical Parameters	Reference / Remark
Material	Heat treated non-alkali fiberglass (uncoated)	—
Insulation Type	Inorganic high-temperature fiberglass sleeving	—
Thermal Rating	400°C – 600°C	—
Continuous Working Temperature	400°C – 500°C	—
Thermal Endurance	No cracking after 6 hours at 400±5°C	Thermal endurance test
Heat Aging Resistance	245±5°C for 6 hours, no degradation	Aging test
Breakdown Voltage	0.6 – 0.8 kV	Typical value
Maximum Voltage	< 10 kV	Application dependent
Flame Retardancy	VW-1	UL 1441
Fire Resistance	Pass	UL 1441 VW-1
Inner Diameter Range	0.5 mm – 45 mm	Standard sizes
Flexibility	Good flexibility even at high temperature	—
Typical Applications	Bus bars, un-insulated or partially insulated conductors, component leads, and high-temperature electrical assemblies	Industrial electrical insulation