Flexing rubber the shock expansion joints advantages of the product is within the layer. Enhancement layer. Jia together molded outer layer vulcanization molding rubber single ball bad and nested amount of gold flange. High pressure good elasticity. Large displacement, vibration absorption noise reduction effect. Convenient installation. Shoe widely used shrink drainage. HVAC, fire. Pressure the jurisdiction machine paper. Pharmaceuticals. Ship. Pump. Fans and other piping systems. Flexible rubber damping telescopic joint structure 1, the product can greatly reduce the vibration and noise of the piping system, can be a fundamental solution to all kinds of pipe interface displacement, axial expansion, and the heart of a problem. 2, according to the different materials can be made of acid and alkali resistance, resistance to corrosion, oil, heat and various varieties to adapt to a variety of media and environment. The material is polar rubber sealing, light weight, easy installation and maintenance, long service life, but avoid contact with sharp metal instrument, so as not to pierce the sphere. 4, such as overhead can be equipped with flexible bracket bolts to use when installing on a tight angle method. 5, such as the line pressure is excessively high, the application limits bolt ends flange connected together. 6, flange connection standard adopted GB4216.3-4216.5 standard, and can otherwise noted. Working pressure rating of this product 0.6Mpa, 1 Mpa, 1.6 Mpa, 2.5 Mpa.