Expansion joints are designed
– To absorb heat-induced expansion and contraction,
– For absorving vibration,
– For reducing noise,
– To allow movement due to ground settlement or earthquakes
These are found between sections of buildings, railway tracks, piping systems, ships and other structures. Expansion joints help to reduce cracking, leakage and failure.
We manufacture rubber expansion bellows for piping systems where acids, alkalis, chemicals, aggressive chemical waste water at high temperature and pressure are involved. We use NBR, Neoprene, EPDM, PTFE as Rubber liner.
Product Specification
| Payment Terms | Western Union, T/T, L/C, D/A, D/P, MoneyGram | Supply Ability | 10000 sets per week |
| Delivery Time | Two weeks (5000 pcs) | Packaging Details | carton or wooden |
| Size | DN32—DN3000 | Material | EPDM,NBR,SBR |
| Flange Standard | DIN,ANSI,BS | Working pressure | -0.2~4.5Mpa |
| Working Temperature | -30~120℃ | Burst Pressure | 6.0Mpa |
| Control Rod | With | OEM | Yes |
| Businese Type | Factory | Brand Name | Knaftrade |
| Model Number | RFJD | Certification | BSTI |
| Place of Origin | Bangladesh |
DN80 DIN standard carbon steel flange single sphere FKM rubber expansion joint
Product Description
1. Main body: NR,NBR,EPDM,etc
2. Key Frame: Nylon cord fabric
3. Pressurized ring: Steel wire strand
4. Flange: Q235,QT450,SS304,SS31
| GENERAL CHARACTRISTICS | |
| Nominal Diameter | DN15-DN3000 |
| Working Pressure | PN6-PN25 |
| Working Temperature | -20℃-140℃ |
| Working Medium | Water,Oil,Acid,Alkali |
Part of technical data
| Main data of rubber 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° |
To select the proper piping expansion joint, it is critical to understand the media compatibility with the materials selected, full temperature, pressure and vacuum ranges, movements required, and dimensions between pipe flanges. With this information, Knaf application engineers can assist in determining the ideal expansion joint for any application.
Any Other Measurements Are Applicable