Can you use a leather pad when installing a flexible rubber soft joint?

No. 1. During the construction and installation of flexible rubber joint pipelines, they must be kept in a natural state, and the products should not be artificially deformed during installation. This avoids early damage to the product and weakening of the effectiveness of the product.

Flexible rubber joints are strictly forbidden to exceed the displacement limit during installation.

2. If you design and install the product at the near end of the outlet of the pump or the corner part of the pipeline, as well as when the product is used in high pressure and high-rise buildings, the pipeline must have a fixed support or fixed bracket, and the force of the fixed support and fixed bracket must be greater than the axial force, otherwise the product should be installed with an anti-pull-off limiting device.

3. When the flange rubber joint is installed, the reinforcing rings at both ends of the ball (the rigid wire rope in the protruding part) must be all snapped into the flange groove to prevent the ball and the flange from pulling off when the pipeline is under pressure. When attaching the bolts, tighten the symmetrical bolts (six or four) first to ensure that the ball is fully in place with the flange.

4. When the rubber joint is connected with the pipe flange, the bolt screw should be extended to one end of the pipe flange to prevent the thread from crushing or puncturing the arched part of the rubber joint when it is expanded under pressure, and the bolts at each end must be compressed and tightened symmetrically, so that all bolts are tightened consistently, and in places with poor use conditions, in addition to increasing the flat gasket, a spring washer should also be added to prevent the nut from loosening.

5. When the rubber joint is used in the close distance of the water (oil) pump outlet or under the condition of frequent start and stop, in order to reduce the impact of excessive stretch and compression of the length of the rubber joint on the pump and pipeline, limiting devices should be added at both ends of the flange.

6. When installing and using large-diameter flexible rubber joints, in order to facilitate installation and reduce labor intensity, a short pipe of appropriate length should be made at one end of the flange, and after the rubber joint is connected with the short pipe and the other end of the pipe, the short pipe and the long pipe at the opposite end should be welded.

7. In order to facilitate the radial deviation caused by the deformation of short pipe welding, the pipe flanges at both ends should be temporarily welded with round bars or other metal objects of corresponding strength before welding, so that the rubber joint and the flange connection form a rigid body, and after the short pipe welding is completed, the weld object is removed, so that the rubber joint is in a natural state after installation.

8. In the implementation of temporary welding of metal joints and flanges, remember to cover the rubber joints at the welding place with a cover-up to avoid burning the ball during welding.

Part of the content is from the rubber joint encyclopedia.

Here are some of the well-known brands recognized in the rubber soft joints industry, which are widely recognized and have a great reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

It can be used to bend rubber joints to dampen vibration and sound suppression. It is mainly used in chemical industry, pipeline, construction and other fields.

The flexible rubber joint mainly absorbs vibration, noise and compensates the lateral, axial and angular displacement of the pipeline, so as to prolong the service life of the pipeline and ensure the safe and effective operation of the pipeline.

1. Pay attention before installation.

The appropriate flexible rubber joint model must be selected according to the working pressure, connection method, medium and compensation amount of the pipeline, and the quantity should be selected according to the requirements of noise reduction displacement.

2. It is necessary to pay attention to the adjustment of pressure.

When the instantaneous pressure value generated by the pipeline is greater than the pressure value generated when the working pressure is generated, it is necessary to select a flexible rubber joint that is one gear higher than the working pressure. At the same time, when the pipeline medium is acid, alkali, oil, high temperature and other special materials, a joint higher than the pipeline pressure should be selected.

3. The connection of flexible rubber joints.

The flange connecting the flexible rubber joint should be very flanged or conform to GB T9115-2000.

4. When under pressure.

The normal applicable medium of flexible rubber joints should be the temperature of 0-60 in the ordinary people, if you encounter special media such as: oil, acid and alkali, high temperature and other corrosive media should choose the corresponding flexible rubber joints!

6. It is suitable for the inlet and outlet of the water pump.

When the flexible rubber joint is used at the inlet and outlet of the water pump, it should be located near the side of the water pump, and a metal reducer joint should be installed between it and the water pump, and it should be installed at the large diameter of the reducer.

7. The displacement of the pipeline is greater than the maximum compensation value of the joint.

When the displacement of the pipeline is greater than or equal to the maximum compensation of the joint, the number of joints should be increased to parallel the displacement, and it is strictly forbidden to adjust the deviation of the pipeline, so that the joint is in the state of extreme disturbance displacement and deviation, and the limit (expansion, displacement, deflection, etc.) can not be exceeded.

8. When the high-rise water supply.

For high-rise water supply or suspended water supply, the pipeline should be fixed on the hanger, bracket or anchor frame, and the joint should not be allowed to bear the weight of the pipeline itself and the axial force, otherwise the joint should be equipped with an anti-pull-off device.

9. When installing.

When installing flexible rubber joints, the screws of the bolts should be extended to the outside of the joints, and the bolts on the end face of each flange should be repeatedly and evenly tightened according to the method of diagonal pressurization to prevent pressure deviation. The wire joint should be tightened evenly with a standard wrench, and the union should not be smoothed, slipped, and broken by the afterburner rod, and should be checked regularly to avoid loosening and causing discing or water seepage.

10. Post-inspection.

Regular and timely maintenance of flexible rubber joints, for example, when using or storing flexible rubber joints, avoid high temperatures, ozone, oil, acid and alkali environments. At the same time, considering the aging problem of rubber products, it is necessary to build a sunshade frame in the outdoor or sunny and windward pipes, and it is necessary to strictly prohibit exposure, rain and wind erosion.