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Varglas S1600 Sleeving is a high-strength, high-temperature sleeving produced from special S-2 Glass fibers which, in addition to enhanced dielectric and mechanical properties, provide thermal protection beyond the limits of conventional sleeving made from E-glass fibers.Although both S-2 Glass and E-glass fibers have excellent resistance to all types of nuclear radiation, S-2 Glass, unlike E-glass, is free of boron and, therefore, in the hostile atmosphere of a reactor, will not decompose to form gaseous products.There are five types of S1600 Sleeving, all of which are noncorrosive, nonflammable and impervious to fungus attack.

Untreated: Not heat cleaned or treated, but containing its original sizing so it is available only in white.
Type H: Heat cleaned only. Since it is not treated with sizing or pigments after heat cleaning, it is available only in the natural (silver) color.
Type HO: Heat cleaned and treated with an acrylic resin binder (natural or pigmented).
Type HM: Heat cleaned and treated with an oleoresinous binder (natural or pigmented).
Type ML: Heat cleaned and treated with Pyre ML binder (natural or pigmented).
Binders are applied to retard fraying and to hold sleeving round for cutting. Types HO, HM and ML are available in a variety of colors which may be less vivid after exposure to 150C. All five types are available in various wall thicknesses as well as with multiple walls. All will serve as secondary insulation unaffected indefinitely through a temperature range from -70C to 482C and withstand up to 950C for shorter periods. Since there is no impregnant that will provide dielectric properties at those extremes, these sleevings require heavy or multiple-wall thicknesses if used as primary insulation.

Varfil Sleeving is braided fiberglass coated with a polyester-modified polyvinyl chloride resin. The composite coating on this Class 130C sleeving has improved properties over standard polyvinyl plastisol coatings with regard to chemical compatibility and solvent resistance (resists swelling in oil, xylol and trichloroethane). Some users prefer the slight degree of firmness found in Varfil when compared to Varflo (vinyl-coated fiberglass).

Specifications

Varfil Sleeving conforms to military specification MIL-l-31902, latest revision (Grade A); NEMA TF-1, Type 2; and ASTM-D876.

Under the Component Program of Underwriters Laboratories, all grades of Varfil Sleeving comply with VW-1 flammability requirements under UL File #E53690.

Varflex Nylon Untreated Sleeving is a flexible, protective sheathing that exhibits outstanding toughness and abrasion resistance. It is braided from high- tenacity nylon yarns that have been light and heat stabilized, have low dry-heat shrinkage (6%) and were designed specifically for industrial end uses. Of the 17 standard sizes of Nylon Untreated Sleeving offered by Varflex, ten of them are available both in standard wall (Type 94) and a heavier wall (Type 94H). Type 94H is identical to Type 94 except heavier nylon yarns are used, resulting in wall-thickness increases, depending upon inside diameter. The seven other standard sizes are supplied in single wall thicknesses and do not carry a type designation. (See Tables below.)Varflex Untreated Nylon Sleeving conforms to Defense Supply Center Richmond's Commercial Item Description (CID) A-A-59301 (latest revision) covering "Sleeving, Textile, Braided, Synthetic Polymer", and is made from polyamide (nylon) yarns conforming to Military Specification MIL-C-572 (latest revision), Type P (polyamide), Form Y (yarn)

Varspan expandable monofilament sleevings are designed to provide mechanical protection to wires, cables, harnesses, hydraulic lines, tubes, hoses, etc., as well as to components of both regular and irregular shapes. Their ability to expand to two or three times their original ID allows for ease of application and their open-weave braid construction, which will not trap heat or moisture, results in a cost-effective bulkweight ratio.

Varspan is available as an expandable polyester monofilament sleeving, in three types, or as an expandable Halar E-CTFE (ethylene chlorotrifluoro ethylene) monofilament sleeving.

Varspan Sleeving made with expandable polyester-monofilaments is offered in both general purpose (Varspan GP) and flame-retardant (Varspan FR) yarns. The general purpose version of Varspan is also available in heavy duty (Varspan HD) which is braided with a thicker .015 polyester-monofilament strand for applications where additional abrasion and cut- through protection are required. All exhibit good mechanical, chemical, and thermal stability in a temperature range of -70C to +125C.

Varspan Sleeving made with expandable Halar monofilaments is offered as Varspan HT. In addition to being flame retardant, Varspan HT (Halar ) offers superior resistance to most solvents, acids and bases and can be used in higher operating temperatures (-70C to +150C) than Varspan GP, FR and HD sleevings.