1. The non-metallic Compensator has good reducibility of repeated displacement (change), can provide large multi-dimensional direction compensation in a small range, and can better eliminate the error of various pipeline installation and connection. 2. The non-metallic Compensator has superior sound absorption and isolation function, which can effectively reduce and eliminate the transmission of vibration of boiler fan system. 3. The weak transmission loss of the non-metallic Compensator reduces the design procedure and does not need to add other auxiliary facilities. 4. The non-metallic Compensator and heat insulation materials have good heat resistance and corrosion resistance, never rust and reduce maintenance costs. 5. The non-metallic Compensator has excellent air tightness and flexibility, and can transport medium without leakage and repeated displacement. 6. According to the engineering design requirements, our company has developed new single wave and multi wave, high pressure, high temperature, high performance duct soft connection products. Because of its wave height and wide, its compression, elongation, angular, lateral, deflection displacement is larger, it is very suitable for the more harsh working conditions.