Silflex Sleeving

(-56°C to +200°C) (-69°F to +392°F)

Spec Sheet Download

Description

Silflex Sleeving is flexible, secondary insulation made from closely braided, continuous filament fiberglass which, after heat cleaning to remove impurities such as starch, oils and binders, is impregnated with a high-temperature silicone resin.

Specifications

Silflex Sleeving conforms to NEMA TF-2 and is made from glass fibers conforming to Military Specification MIL-Y-1140 (latest revision), Class C, Form 1 (continuous filament yarns). Under the Component Program of Underwriters Laboratories, Silflex sleeving complies with VW-1 flammability requirements under UL File #E53690.

Applications

Silflex Sleeving is used in areas where flexibility as well as resistance to radiation, moisture, high temperature, and flame are essential. It offers space factor electrical insulation of approximately 650 volts with minimum outgassing, particularly after a pre-bake, and readily accepts potting compounds thereby enhancing electrical properties in systems work.

Sizes

AWG #24 through 2” l.D. Other sizes subject to inquiry.

Standard Color

Natural. Other colors made to order.

Standard Packaging

Coils or spools at manufacturer’s option unless otherwise specified.

Specifications

Varglas Silflex Properties

Physical
	Property	Performance
	Specific Gravity, g/cu. cm.	2.55 – 2.58
	Elongation at Break, percent	4.5 – 4.9
	Tensile Strength, psi @ 22°C	500,000 – 550,000
	Water Absorbency @ 22°C, 65% R.H.	None
Chemical
	Resistance to Acids and Alkalies	Excellent in weak solutions. Fair in concentrated solutions.
	Resistance to Solvents	Fair
	Resistance to the Elementst	Good Sunlight and weathering properties.
	Compatibility	Improved compatibility with most potting compounds and varnishes.
	Moisture Vapor Resistance	Excellence
Electrical
	Dielectric Strength	Provides only space factor electrical insulation of approximately 650 volts.
	Volume Resistivity @ 22°C and 500 volts dc, ohm-cm	10¹⁵ – 10¹⁶
	Dielectric Constant @ 22°C, 60 Hz	6.5 – 6.8
	Dissipation Factor @ 22°C, 1 MHz	0.001 – 0.005
Thermal
	Thermal Endurance	Up to 200°C indefinitely.
	Brittleness Temperature	– 56°C per ASTM D746
	Flame Resistance	Passes UL 1441 (VW-1). Will not burn.
Note:
	Average properties of bulk S Glass, as reported in Owens-Corning Publication No. 5-TEX-18027. considered to be applicable to bare glass filaments. Information contained here is precise and reliable. However, being unique, each end-use should be evaluated to satisfy its specific requirements.

Standard Sizes

Sleeving sizes in the following table are based on the size of round conductors that will fit snugly into the product without distortion of the sleeving.

Wire Size	Inside Diameter					Wall Thickness (minimum)*
(AWD)	Maximum Inches	Nominal inches	Minimum Inches	MM Size (to .5mm)	MM – Dec. Equivalent	Grade A Inches	Grade B Inches	Grade C Inches
No. 24	0.027	0.022	0.020	.5	0.01969	0.011	0.007	0.006
No. 22	0.032	0.027	0.025			0.013	0.007	0.006
No. 20	0.039	0.034	0.032			0.013	0.007	0.006
No. 19	0.044	0.038	0.036	1.0	0.03937	0.013	0.007	0.006
No. 18	0.049	0.042	0.040			0.015	0.007	0.006
No. 17	0.055	0.047	0.045			0.015	0.007	0.006
No. 16	0.061	0.053	0.051			0.015	0.007	0.006
No. 15	0.066	0.059	0.057	1.5	0.05906	0.015	0.007	0.006
No. 14	0.072	0.066	0.064			0.015	0.007	0.006
No. 13	0.080	0.076	0.072	2.0	0.07874	0.015	0.007	0.006
No. 12	0.089	0.085	0.081			0.015	0.007	0.006
No. 11	0.101	0.095	0.091	2.5	0.09842	0.018	0.009	0.008
No. 10	0.112	0.106	0.102			0.018	0.009	0.008
No. 9	0.124	0.118	0.114	3.0	0.11811	0.018	0.009	0.008
No. 8	0.141	0.133	0.129	3.5	0.13780	0.018	0.009	0.008
No. 7	0.158	0.148	0.144	4.0	0.15748	0.018	0.009	0.008
No. 6	0.178	0.166	0.162	4.5	0.17716	0.020	0.011	0.010
No. 5	0.198	0.186	0.182	5.0	0.19685	0.020	0.011	0.010
No. 4	0.224	0.208	0.204	5.5	0.21654	0.020	0.011	0.010
No. 3	0.249	0.234	0.229	6.0	0.23622	0.020	0.011	0.010
No. 2	0.278	0.263	0.258	7.0	0.27559	0.020	0.011	0.010
No. 1	0.311	0.294	0.289	7.5	0.29528	0.020	0.011	0.010
5/16″	0.334	0.313	0.313	8.0	0.31496	0.020	0.011	0.010
No. 0	0.347	0.330	0.325	8.5	0.33464	0.025	0.011	0.016
3/8″	0.399	0.375	0.375	10.0	0.39370	0.025	0.017	0.016
7/16″	0.462	0.438	0.438	11.5	0.45276	0.025	0.017	0.016
1/2″	0.524	0.500	0.500	13.0	0.51181	0.025	0.017	0.016
5/8″	0.655	0.625	0.625	16.5	0.64960	0.025	0.017	0.016
3/4″	0.786	0.750	0.750	19.5	0.76772	0.025	0.017	0.016
7/8″	0.911	0.875	0.875	22.5	0.88582	0.025	0.017	0.016
1″	1.036	1.000	1.000	25.5	1.00470	0.025	0.017	0.016
Over 1″ Upon Request
*Minimum required wall thickness per NEMA standard TF-1