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High-Temperature Insulating Silicone Fiberglass Sleeve - China Factory & Suppliers for Overhead Line Protection
★ Product Features & Core Advantages
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🌡 Excellent High-Temperature Resistance
Benefiting from the stability of the fiberglass substrate, the products offer a wide operating temperature range. For instance, silicone rubber fiberglass sleeve can be used continuously from -65°C to 260°C while maintaining flexibility. Silicone resin fiberglass sleeve has a continuous operating temperature of up to 200°C, with short-term tolerance of 260°C. PVC fiberglass sleeve withstands temperatures up to 105°C. Some fiber casings are suitable for continuous high-temperature operation at 538°C.
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⚡ Superior Electrical Insulation
The products possess strong insulating capabilities, suitable for high-voltage environments. For example, silicone resin fiberglass sleeve has voltage withstand ratings from 1200V to 7000V, with some products rated at 1.5KV, 4KV, or higher. The room temperature breakdown voltage for PVC fiberglass sleeve is 2000V. Their dielectric properties, voltage endurance, arc resistance, and corona resistance are excellent, making them ideal electrical insulation materials.
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🔥 Reliable Flame Retardancy & Fire Safety
Most products feature good self-extinguishing properties, quenching rapidly upon removal from a flame source, and comply with flame retardant standards like VW-1. Products like silicone rubber fiberglass sleeve are also known as fire-resisting sleeves and serve as safe, eco-friendly alternatives to hazardous materials like asbestos.
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🛡 Good Mechanical & Chemical Protection
The braided structure provides good flexibility and bend adaptability, facilitating wiring in complex spaces. Additionally, the products offer tear resistance, abrasion resistance, and provide a degree of water, oil, ozone, and chemical stability, protecting internal cables from mechanical damage and chemical corrosion.
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✔ Diverse Specifications & Certifications
The product diameter range is extensive, commonly from Φ0.8mm to Φ40mm, with special models up to Φ35.0mm or larger to meet different wire gauge needs. A variety of colors are available, such as white, black, red, blue, etc. Products typically comply with environmental and safety certifications like SGS and ROHS.
★ Product Specifications & Parameters
◎ Base Material: High-purity alkali-free braided fiberglass tube.
◎ Coating Material: PVC resin, silicone resin, silicone rubber, etc.
◎ Standard Colors: White, black, red, blue, white with green stripe, white with red stripe, white with blue stripe, etc. (depending on type).
◎ Diameter Range: Φ0.8mm ~ Φ40mm (common), special sizes can be made customization.
◎ Continuous Operating Temperature:
◎ PVC Fiberglass Sleeve: ~105°C
◎ Silicone Resin Fiberglass Sleeve: ~200°C
◎ Silicone Rubber Fiberglass Sleeve: -65°C ~ +260°C
◎ General Fiber Sleeve: -60°C ~ +200°C (some models withstand higher temperatures)
◎ Voltage Withstanding Rating: Varies from 1.2KV to 7KV depending on product type and specification.
◎ Flame Retardant Standard: Complies with standards such as VW-1.
◎ Certifications: ROHS, SGS, compliant with relevant national or industry standards (e.g., Type 2715-Ⅲ).
★ Primary Application Fields
- ◎ Motor & Electrical Appliance Insulation: Widely used for wire insulation and end winding protection in various motor, generator, and transformer windings (e.g., Class H, Class N).
- ◎ Home Appliances & Electronics: Used for internal wiring bundling, insulation, and heat resistance in electric heating equipment, televisions, air conditioners, microwave ovens, etc.
- ◎ Industrial Equipment & Instruments: Suitable for cable protection in high-temperature environments like electric furnaces, ovens, and induction heating equipment in metallurgy, chemical, and mining industries, as well as internal wiring in various instruments.
- ◎ Special Lighting & Electric Heating Products: Used for external insulation and protection of high-temperature lamps (e.g., halogen, metal halide), heating tubes, and heating elements.
- ◎ Automotive & Rail Transit: Engine compartment wiring harnesses, battery pack connections, and other areas requiring high-temperature and flame-retardant protection.
- ◎ Aerospace & Military Equipment: Insulation protection for electrical systems with extremely high requirements for weight, temperature resistance, and reliability.
★ Characteristics
| Item | Silicone Fiberglass Sleeve |
|---|---|
| Temperature Endurance (℃) | -10℃ ~ +200℃ |
| Temperature Endurance | 200℃ ±2℃, 168h ≥ 1/2 |
| Aging Test | 260℃, 6h, No Cracking |
| Cold Bend | No Cracking |
| Off-self Time (S) | 10S |
| Horizontal Flame Test | ≤ 30S |
| Flammability | VW-1 |
| Volume Resistivity (Ω.cm) | 1011 |
| Submerge Water Test | Not sticky, not deformed, not softened |
| Type | Testing Condition | Average Voltage (V) | Individual Value (V) |
|---|---|---|---|
| FLT-15 | UL1441 | 1200 | 800 |
| FLT-15 | UL1441 | 1500 | 1000 |
| FLT-25 | UL1441 | 2500 | 1800 |
| FLT-40 | UL1441 | 4000 | 3000 |
| FLT-70 | UL1441 | 7000 | 5000 |
★ Installation & Usage Guide
- ◎ Selection Guide: Choose the appropriate coating type and size based on the maximum operating temperature, required insulation level (voltage rating), harness diameter, and flame retardancy requirements of the actual application environment.
- ◎ Installation Method: Slide the sleeving directly over the wire or harness to be protected. It can be cut to specific lengths as needed. Its flexibility allows easy bending to follow wiring paths.
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◎ Precautions:
• Although heat resistant, avoid prolonged direct contact with open flames or extreme heat sources exceeding the product's rated temperature.
• For applications requiring embedding in walls or concrete, note that wire replacement during maintenance might be more difficult compared to rigid conduit, and concrete curing may cause slight deformation of the sleeve.
• Store in a cool, dry place away from prolonged direct sunlight to slow material aging.
★ Product Specifications
| Size | Inside Diameter (mm) | Min. Wall Thickness (T) (mm) | Packing Length (M/Roll) | |||
|---|---|---|---|---|---|---|
| 1200/1500V | 2500V | 4000V | 7000V | |||
| Φ0.5 | 0.5+0.20/-0 | 0.20 | 0.20 | 0.28 | 0.35 | 100 |
| Φ1.0 | 1.0+0.20/-0 | 0.20 | 0.20 | 0.28 | 0.35 | 100 |
| Φ1.5 | 1.5+0.20/-0 | 0.20 | 0.20 | 0.28 | 0.35 | 100 |
| Φ2.0 | 2.0+0.20/-0 | 0.22 | 0.22 | 0.30 | 0.38 | 100 |
| Φ2.5 | 2.5+0.20/-0 | 0.22 | 0.22 | 0.30 | 0.38 | 100 |
| Φ3.0 | 3.0+0.25/-0 | 0.23 | 0.23 | 0.35 | 0.45 | 100 |
| Φ3.5 | 3.5+0.23/-0 | 0.23 | 0.23 | 0.35 | 0.45 | 100 |
| Φ4.0 | 4.0+0.25/-0 | 0.25 | 0.25 | 0.38 | 0.45 | 100 |
| Φ4.5 | 4.5+0.25/-0 | 0.28 | 0.30 | 0.40 | 0.48 | 100 |
| Φ5.0 | 5.0+0.35/-0 | 0.33 | 0.33 | 0.43 | 0.50 | 100 |
| Φ6.0 | 6.0+0.35/-0 | 0.35 | 0.36 | 0.45 | 0.52 | 100 |
| Φ7.0 | 7.0+0.50/-0 | 0.36 | 0.40 | 0.46 | 0.54 | 100 |
| Φ8.0 | 8.0+0.50/-0 | 0.38 | 0.43 | 0.49 | 0.56 | 50 |
| Φ9.0 | 9.0+0.50/-0 | 0.40 | 0.44 | 0.50 | 0.58 | 50 |
| Φ10.0 | 10+0.70/-0 | 0.43 | 0.46 | 0.53 | 0.62 | 50 |
| Φ12.0 | 12+0.70/-0 | 0.43 | 0.46 | 0.53 | 0.62 | 50 |
★ Note
1. Standard color is White, other colors and special sizes can be made as per customization.
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★ Frequently Asked Questions (FAQ)
Q1 What is the maximum continuous operating temperature of silicone rubber fiberglass sleeve?
Silicone rubber fiberglass sleeve can be used continuously from -65°C to 260°C while maintaining flexibility. Some specialized fiber casings are rated for continuous high-temperature operation at up to 538°C, making them suitable for extremely demanding thermal environments.
Q2 What voltage ratings are available for fiberglass insulation sleeves?
Voltage withstand ratings vary by product type and specification. Silicone resin fiberglass sleeves are available in ratings from 1200V up to 7000V. PVC fiberglass sleeve has a room temperature breakdown voltage of 2000V. Specific types (FLT-15, FLT-25, FLT-40, FLT-70) are tested according to the UL1441 standard.
Q3 Are fiberglass insulation sleeves flame retardant and safe to use?
Yes. Most fiberglass insulation sleeves feature self-extinguishing properties, quenching rapidly when removed from a flame source. They comply with the VW-1 flame retardant standard. Silicone rubber fiberglass sleeves are also considered safe, eco-friendly alternatives to hazardous materials like asbestos.
Q4 What diameter sizes are available, and can custom sizes be ordered?
The standard diameter range is from Φ0.5mm to Φ40mm, covering a wide variety of wire and harness gauges. Special sizes beyond this range can be produced through custom order. A range of colors is also available including white, black, red, blue, and striped variants; custom colors can be arranged upon request.
Q5 What certifications do these fiberglass sleeves comply with?
The products comply with ROHS and SGS environmental and safety certifications. They also meet relevant national and industry standards such as Type 2715-Ⅲ, and voltage withstand tests are conducted in accordance with the UL1441 standard.
Q6 How should fiberglass insulation sleeves be installed and stored?
Installation is straightforward — simply slide the sleeve over the wire or harness and cut to the desired length. Its flexibility allows easy routing around bends. For storage, keep the product in a cool, dry place away from direct sunlight to prevent premature material aging. Avoid prolonged direct contact with open flames or heat sources exceeding the rated temperature.