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1.Epoxy resin fiber glass winding tubeWith special designed Epoxy resin fiber glass winding tube made of special purpose epoxy resin (high-temperature resistance and ultra low viscosity property) and high-quality glass fiber, you can make high voltage and SF6 extra high-voltage composite busing from 40.5KV to 550KV. Reinforced with glass fiber and special winding structure, this product is more suitable for heavy earthquake area with high bending property and excellent mechanicalperformance. With some high-temperature resistant resin as reinforce agent, this product is applied to act as hollow tube with resistance of high temperature nature and SF6 gas from the arc. With good corrosion resistance to SF6 gas . Excellent insulating property , the value of partial discharge testing is less than 5pC 2.Application: SF6 high-voltage switch, hollow insulator/bushing Switch gear for the transformer Tailor-made is also possible to meet various specification. The winding tube is calculated on the basis ofthe internal diameter according to our standard, and the external diameter and length can be made according to customers special needs for their products. The series internal diameter of the winding tube: φ57 φ60 φ64 φ66 φ76 φ83 φ92 φ100 φ103 φ110 φ135 φ145 φ170 φ176 φ188 φ190 φ220 φ240 φ248 φ325 φ370 φ400 φ500 we have passed iso9001 quality certification 3.we can supply you reasonable price with best quality