hdu rubber vibration isolator, Germany hdu model, hdu price

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

hdu rubber vibration isolator selection

Instructions for selecting flexible rubber joints: 1. The standard applicable temperature range for rubber joints is -200 to 70°C. The 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 working 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, when installing, the bolts connecting the flanges must be inserted from the inside of the flange to both ends of the flange respectively. Washers or spring washers must be added, and the bolts must be tightened diagonally and gradually. For rubber joints connected with union joints, do not swap the union joints at the left and right ends during installation to avoid leakage or damage to the product.

hdu rubber vibration isolator advantages

It is a flexible element that can effectively compensate for axial deformation. For example, the expansion joints welded on the shell of fixed tube-sheet heat exchangers have high axial flexibility and are prone to deformation. They can compensate for the thermal expansion difference between the tubes and the shell caused by different wall temperatures, reduce their axial loads, thereby reducing the temperature differential stress on the 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 type, ring plate welded type and clamp shell type, among which bellows expansion joints are the most widely used, while ring plate welded expansion joints are only suitable for atmospheric or low-pressure occasions.

hdu 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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