Place of Origin:
China
Brand Name:
JINGNING
Certification:
CE，ISO
Model Number:
RFJD
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DN32-DN3000 Flexible Rubber Joint Flange , EPDM Bellows Expansion Joint Thermal Stable
Bellows expansion joint is also known as rubber bellows, rubber joint, single ball flexible connection, expansion joint bellows, etc. The axial expansion joint is mainly composed of two PCs flanges and a rubber ball. Flanges are used for connection. The rubber ball is flexible and can absorb axial, horizontal and annular displacement. The normal working pressure of the axial expansion joint is 16bar and the normal working temperature is - 15 ~ + 90 ℃. The standard size of the axial expansion joint is dn25-dn3000. The standard rubber materials are natural rubber, EPDM, neoprene, nitrile rubber and polytetrafluoroethylene. The standard flange materials are carbon steel galvanized, carbon steel painted, cast iron painted and stainless steel. Of course, if you have any special requirements, please let us know and we will recommend a good solution to you.
Performance characteristics of bellows expansion joint
1. It has the advantages of small volume, light weight, good ductility, convenient installation and maintenance, etc.
2. Installation can cause horizontal, radial and angular offset, which is not limited by the uneven center of pipe plug and flange surface.
3. When working, it can reduce the noise transmitted by the structure and has strong damping capacity.
Technical data of bellows expansion joint
| Main data of bellows expansion joint | ||||||
| Nominal diameter(DN) | Length | Axial displacement(mm) | Horizontal displacement | Deflexion angle | ||
| mm | inch | mm | Extension | Compression | mm | (a1+a2)° |
| 32 | 1 1/4 | 95 | 6 | 9 | 9 | 15° |
| 40 | 1 1/2 | 95 | 6 | 10 | 9 | 15° |
| 50 | 2 | 105 | 7 | 10 | 10 | 15° |
| 65 | 2 1/2 | 115 | 7 | 13 | 11 | 15° |
| 80 | 3 | 135 | 8 | 15 | 12 | 15° |
| 100 | 4 | 150 | 10 | 19 | 13 | 15° |
| 125 | 5 | 165 | 12 | 19 | 13 | 15° |
| 150 | 6 | 180 | 12 | 20 | 14 | 15° |
| 200 | 8 | 210 | 16 | 25 | 22 | 15° |
| 250 | 10 | 230 | 16 | 25 | 22 | 15° |
| 300 | 12 | 245 | 16 | 25 | 22 | 15° |
| 350 | 14 | 255 | 16 | 25 | 22 | 15° |
| 400 | 16 | 255 | 16 | 25 | 22 | 15° |
| 450 | 18 | 255 | 16 | 25 | 22 | 15° |
| 500 | 20 | 255 | 16 | 25 | 22 | 15° |
| 600 | 24 | 260 | 16 | 25 | 22 | 15° |
Note: The special requirements of bellows expansion joint can be customized according to user's drawing. Flange standard is GB / t9115.1-2000. Various flange standards (GB, JB, Hg, CB, ANSI, DIN, BSEN, NF, en, JIS, ISO, etc.) can be selected for production. The rubber ball of axial expansion joint can be used as natural rubber, EPDM, chloroprene rubber, butyl rubber, butadiene rubber, fluororubber, etc. when the axial expansion joint above DN200 is used for suspension water supply, the pipeline must have fixed support or fixed support, otherwise the axial expansion joint shall be installed with anti falling device.
Bellows expansion joint details show
Bellows expansion joint production flow
It is very important to know the compatibility between the medium of axial expansion joint and the selected expansion rubber material, the range of full temperature, full pressure and full vacuum, the required movement of axial expansion joint, and the size between pipe flanges when selecting the appropriate flexible joint pipe. With this information, JINGNING application engineers can help determine the ideal axial expansion joint for any application.
Bellows expansion joint advantage
1. Ex factory price of axial expansion joint.
2. 16 years of manufacturing experience and 5 years of export experience.
3. Strict quality inspection, the quality far exceeds the industry standard.
4. The mold has a variety of specifications and supports customization and OEM.
5. Provide samples free of charge.
6. Large inventory.
Bellows expansion joint application
Bellows expansion joints are widely used in various pipeline systems, such as the connection between axial expansion joints and pumps, valves, fire-fighting equipment and pipelines with large vibration. Pipes with frequent changes in cold and heat. It is mainly used for the lifting and transportation of remote water and sewage, water supply and cooling circulating water of thermal power plants, pipeline transportation in metallurgical industry, condensate water, pipeline transportation in chemical industry, cooling and dilution in petrochemical industry, and flexible connection between long-distance and short-distance pipelines in other industries. Because the axial expansion joint has high wear resistance, it is also suitable for all particle, powder and gas low-temperature industries.
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