Varglas 240 Silicone Rubber

Varglas 240 Silicone Rubber Sleeving

Class: 240 S (-80°C to +240°C) (-112°F to +464°F)

Dielectric Strength Grade: A-1

Spec Sheet Download

Description

Varglas 240 Silicone Rubber Sleeving is produced by coating braided fiberglass with a specially formulated, proprietary silicone rubber that exhibits exceptional high-temperature properties. In addition to its flexibility, toughness and abrasion resistance, Varglas 240 Silicone Rubber provides superior thermal protection and flame resistance with a higher dielectric capability at less weight than previously available. Its ability to meet a Class 240°C rating, combined with a brittleness temperature of -80°C, makes it an ideal choice for applications that require outstanding physical and electrical insulation properties throughout a wide operating temperature range.

Specifications

Varglas 240 Silicone Rubber Sleeving conforms to, and is listed on the qualified Products List (QPL) for, MIL-l-3190/9, latest revision (Grade A); and exceeds the requirements of UL 1441, Table 19.8; NEMA TF-1, Type 5; and ASTM-D372.

Under the Component Program of Underwriters Laboratories, Grade A Varglas 240 Silicone Rubber is recognized for 240°C, 600 volt service and complies with VW-1 flammability requirements under UL File #E63450. CSA International certifies the use of Grade A for 240°C, 600 volt service and flammability requirements under CSA File #LR58486 VW-1/FT1.

Applications

Varglas 240 Silicone Rubber Sleeving is suitable for industrial applications such as motors, generators, transformers and engines where superior dielectric protection at elevated temperatures of 240°C is critical. In addition to automotive engines, Varglas 240 Silicone Rubber’s flame resistance and wide-operating temperature range make it particularly well suited for aircraft engines and other aerospace applications where it satisfies electrical and thermal barrier requirements while providing the added benefit of lighter weight.

Sizes

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

Standard Color

Red oxide and black only.

Standard Packaging

Coils, spools or 36” lengths at manufacturer’s option, unless otherwise specified. There is no cutting charge for 36” lengths, but lengths other than 36” are subject to cutting charges.

Sizes over 1” l.D. are generally supplied in 36” lengths.

Specifications

Varglas 240 Silicone Rubber Typical Properties

Physical
	Property	Procedure	Performance
	Tensile Strength, Coating	ASTM-D412	1600 psi
	Ultimate Elongation, Coating	ASTM-D412	800% @ 20°C
	Hardness, Coating	ASTM-D2240	54 (Durometer, Shore A)
	Flexibility and toughness, Coating	UL 1441	Passes (Penetration Test)
Chemical
	Oil and Solvent Resistance	MIL-l-3190/9	Passes
	Water Vapor Resistance	MIL-l-3190/9	Passes
	Resistance to Acids and Alkalies	––	Excellent
	Resistance to the Elements	––	Unaffected by sunlight and weather
	Compatibility	UL 1446	Good. Compatible with most potting compounds and varnishes
Electrical
	Dielectric Strength after 48/23/50:
	Grade A	NEMA TF-1	8000v min. avg., 6000v min. indiv.

	Dielectric Strength after 96/23/96:
	Grade A	NEMA TF-1	80% of Original Value.
	Hydrolytic Stability after 336 hrs. @ 70°C over Constant Water Reflux	MIL-l-3190/9	Passes. 7000v min. avg. with no disintegration, reversion or cracks. (Spec. requires 5000v.)
Thermal
	Thermal Endurance	MIL-l-3190/9 UL 1441	Class 240°C (S)
	Brittleness Temperature	ASTM-D350	-80°C
	Flame Resistance	UL 1441	Passes (VW-1)
		ASTM-D350, Method A	Passes
		NEMA TF-1	Passes
		MIL-I-3190/9 Method A	Passes
	Pushback	MIL-I-3190/9	No cracks or ruptures. 6000 volts min. avg. breakdown strength.
Note:
	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

Military Specs

Government Specification and Designation	Varflex Product	Test or Qualification Reference	Status
MIL-I-3190/2, Class 130°C, Type B, Category b, All Colors, All Sizes, Grade A	Varflo, B-A-1	N.Y. 6139-1	On QPL for MIL-I-3190/2
MIL-I-3190/3, Class 155°C, Type A, Category a, All Colors, All Sizes, Grade A	Varglas Acrylic 343 and 397, F-A-1	Varflex Report No.4203 and Supplement	On QPL for MIL-I-3190/3
MIL-I-3190/5, Class 200°C, Type C, Category c, All Colors, All Sizes, Grade A	Varglas Silicone Resin 500, H-A-1	Varflex Report No.4202 and Supplement	On QPL for MIL-I-3190/5
MIL-I-3190/6, Class 200°C, Type D, Category c, All Colors, All Sizes, Grade A	Varglas Silicone Rubber, H-A-1	Varfiex Report No.4200 and Supplement	On QPL for MIL-I-3190/6
MIL-I-3190/7, Class 220°C, Type E, Category c, All Colors, All Sizes, Grade A	Varglas Viton 231, R-A-1	Varflex Report No.4204	On QPL for MIL-I-3190/7
MIL-I-3 190/8, Class 220°C, Type D, Category c, All Colors, All Sizes, Grade A	Varglas ES-4400 Silicone Rubber, R-A-1	Varflex Report No.4201 and Supplement	On QPL for MIL-I-3190/8
MIL-I-3190/9, Class 240°C, Type D, Category c, All Colors, All Sizes, Grade A	Varglas 240 Silicone Rubber,S-A-1	Varflex Report No.4205, Parts I and II	On QPL for MIL-I-3190/9
	Revised 9/28/1999 (2/1/2018)

Types, Classes & Grades

Definitions

Coated sleeving is a flexible, tubular product braided from cotton, rayon, nylon, glass or other fibers, which is impregnated, coated, or impregnated and coated with an electrical insulating material.

Nema Grades
	A-1	7000* volt average — 5000 volt minimum individual
	B-1	4000 volt average — 2500 volt minimum individual
	C-1	2500 volt average — 1500 volt minimum individual
	C-2	1500 volt average — 800 volt minimum individual
	C-3	No dielectric guarantee
	*For sleeving Types 3, 4, and 5, values are 8000 volt average, 6000 volt minimum individual. For more information, refer to NEMA Standards for Coated Electric Sleeving. Also, ASTM D372.

Types & Classes

Coated sleeving is categorized by the type of coating, base fabric material, dielectric breakdown voltage, temperature index, and inside diameter as follows:

Type 2

A flexible treated sleeving made from inorganic-base yarns such as fibrous glass and impregnated or coated with an insulating material which can be shown by applicable experience or accepted test to have at temperature index of 130 (continuous use at 130°C)

Type 3

A flexible treated sleeving made from inorganic-base yarns such as fibrous glass and impregnated or coated with an insulating material, such as polyvinyl chloride, which can be shown by applicable experience or accepted test to have a temperature index of 105 (continuous use at 105°C).

Type 4

A flexible treated sleeving made from inorganic-base yarns such as fibrous glass and impregnated or coated with an insulating material, such as silicone resin or polytetrafluoroethylene, which can be shown by applicable experience or accepted test to have a temperature index of 200 (continuous use at 200°C).

Type 5

A flexible treated sleeving made from inorganic-base yarns such as fibrous glass and impregnated or coated with an insulating material, such as silicone elastomer, which can be shown by experience or accepted test to have a temperature index of 200 (continuous use at 200°C).

Type 6

A flexible treated sleeving made from inorganic-base yarns such as fibrous glass and impregnated or coated with an insulating material, such as epoxies, polyesters, or acrylics, which can be shown by experience or accepted test to have a temperature index of 155 (continuous use at 155°C).