Double sphere rubber expansion joint generally refers to double bellow rubber joint, double sphere rubber joint is composed of internal rubber layer, reinforced layer with multi-layer scraping rubber nylon curtain cloth, external rubber layer composite rubber pipe joint. When a double sphere rubber joint is installed, over displacement limit installation is strictly prohibited
Expansion Joint, Twin Sphere Dimensions
DN | L | b | n | d | D | Axial Displacement | Lateral Displacement | Angle of Deflection | |||||
150LB | PN16 | 150LB | PN16 | 150LB | PN16 | 150LB | PN16 | Stretch | Compression | a1+a2 | |||
50 | 165 | 18 | 18 | 4 | 4 | 19.1 | 18 | 120.7 | 125 | 30 | 50 | 45 | 35° |
65 | 175 | 18 | 18 | 4 | 4 | 19.1 | 18 | 139.7 | 145 | 30 | 50 | 45 | 35° |
80 | 175 | 20 | 20 | 4 | 8 | 19.1 | 18 | 152.4 | 160 | 35 | 50 | 45 | 35° |
100 | 225 | 20 | 20 | 8 | 8 | 19.1 | 18 | 190.5 | 180 | 35 | 50 | 40 | 35° |
125 | 225 | 22 | 22 | 8 | 8 | 22.4 | 18 | 215.9 | 210 | 35 | 50 | 40 | 35° |
150 | 225 | 22 | 22 | 8 | 8 | 22.4 | 23 | 241.3 | 240 | 35 | 50 | 40 | 35° |
200 | 325 | 24 | 24 | 8 | 12 | 22.4 | 23 | 298.5 | 295 | 35 | 50 | 40 | 35° |
250 | 325 | 26 | 28 | 12 | 12 | 25.4 | 27 | 362 | 355 | 35 | 60 | 35 | 30° |
300 | 325 | 28 | 28 | 12 | 12 | 25.4 | 27 | 431.8 | 410 | 35 | 60 | 35 | 30° |
Expansion Joint, Twin Sphere VS Expansion Joint, Union Type
1. Material (Similarity & Difference):
Expansion joint twin sphere's flange material can be carbon steel & stainless steel ,union material are malleable iron.Both rubber material can be Neoprene.EPDM,NBR.
2. Pressure (Similarity):
Both pressure of expansion joint twin sphere and union type are Class150,PN10/16,JIS 10K/16K
3. Range of Applications (Similarity):
Standard: DIN PN/PN16, ANSI 150LBS, JIS 10K/16K.
Size: 1 1/4"-120" (DN32-DN3000)
Material of Rubber: Neoprene, EPDM, NBR.
4. Installation (Difference):
Twin sphere expansion joint is connected to the flange end of the pipe with bolts, and the union type expansion joint is not connected to flanges end.
Expansion Joint, Twin Sphere FAQs
1. for Expansion Joints, Single Sphere, Twin Sphere, Which One is Better?
Both of them could absorb vibration and noise in the pipelines. However, twin sphere expansion joints could provide more pipeline motion absorption capacity, and even higher noise and vibration control efficiency. Furthermore, twin sphere expansion joints can withstand the most stringent pipe system configuration. They could provide better axial compression or extension, lateral deflection and angular motion.
2. What is the Flange Drilling Available for Flanged Type Expansion Joins?
We trust that through our continued effort and steady growth, Hebei Leading will become one of the premier flanges, butterfly valves manufacturing company in the world, and an all-range provider in the flow control field.
We also have types of stainless steel buttweld fittings for sale, if you have needs, please contact us.
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