eberspaecher rubber vibration isolator Germany eberspaecher model eberspaecher price

eberspaecher rubber vibration isolator consists of a smooth corrugated compensation element with rubber flanges at both ends and metal flanges. The metal flanges often adopt a loose structure. The surface of the corrugated compensation element is rubber, and the inner layer is an interlayer reinforced by several layers of high-strength fibers or steel strips (wires). The reinforced interlayer, such as reinforcing fibers or steel strips (wires), extends all the way to the rubber flanges at both ends, which contain a hard steel wire skeleton. The rubber expansion joint has a large displacement compensation capacity, capable of compensating for axial, lateral, and angular displacements, and offers noise reduction, vibration damping, and certain corrosion resistance. It features high pressure resistance, good elasticity, large displacement, effective vibration absorption and noise reduction, and easy installation, making it widely used in pipeline systems for water supply and drainage, HVAC, fire protection, compressors, papermaking, pharmaceuticals, ships, water pumps, fans, etc.

eberspaecher rubber vibration isolator selection

Selection instructions for flexible rubber joints: 1. The standard applicable temperature range for rubber joints is -200 to 70°C. Instantaneous temperature can reach 115°C, and the operating temperature is 70 to 115°C. 2. For flange-connected rubber joints, if the working pressure and temperature are high (nominal diameter above 200, temperature above 70°C, working pressure above 1.5Mpa), flange rubber joints equipped with limit devices can be selected. 3. For flange-connected rubber joints, during installation, the bolts connecting the flanges must pass from the inside of the flange to both ends respectively, with washers or spring washers added, and the bolts must be tightened diagonally and gradually. For union-connected rubber joints, do not swap the unions at the left and right ends during installation to avoid product leakage or damage.

eberspaecher rubber vibration isolator advantages

It is a flexible element that can effectively compensate for axial deformation. For example, expansion joints welded to the shell of fixed tube-sheet heat exchangers have high axial flexibility and are prone to deformation, compensating for the thermal expansion difference between tubes and shells caused by different wall temperatures, reducing their axial loads, thereby minimizing thermal stress on tubes, tube sheets, and shells, avoiding strength failure, instability failure, and tube pull-out failure. There are many types of expansion joints, commonly used structures include bellows, ring plate welding, and clamp-shell types, among which bellows expansion joints are the most widely applied, while ring plate welding expansion joints are only suitable for atmospheric or low-pressure applications.

eberspaecher rubber vibration isolator applications

Expansion joints are also commonly referred to as compensators or expansion loops. They consist of a bellows (an elastic element) that forms the main working body, along with accessories such as end pipes, supports, flanges, and guide tubes. An expansion joint is a flexible structure installed on vessel shells or pipelines to compensate for additional stresses caused by temperature differences and mechanical vibration. It utilizes the effective axial deformation of its main working body, the bellows, to absorb dimensional changes in pipelines, guide tubes, vessels, etc., caused by thermal expansion and contraction, or to compensate for axial, lateral, and angular displacements in pipelines, guide tubes, vessels, etc. It can also be used for noise reduction and vibration damping. In heating systems, to prevent pipeline deformation or damage due to thermal elongation or temperature stress when the heating pipeline heats up, compensators need to be installed on the pipeline to compensate for the thermal elongation of the pipeline, thereby reducing the stress on the pipe wall and the forces acting on valve components or support structures. As an elastic compensation element capable of free extension and compression, expansion joints offer advantages such as reliable operation, good performance, and compact structure, and have been widely used in chemical, metallurgical, nuclear energy, and other sectors. There are various forms of expansion joints used on vessels; in terms of bellows shape, U-shaped expansion joints are the most widely used, followed by Ω-shaped and C-shaped types. For expansion joints used on pipelines, in terms of structural compensation, they are classified into universal type, pressure-balanced type, hinged type, and universal joint type.

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