Twin sphere rubber expansion joint is similar to single-ball joint in structure, but has a second sphere to provide more pipeline motion absorption capacity, and even higher noise and vibration control efficiency. Twin sphere rubber expansion joint can withstand the most stringent pipe system configuration. They allow for axial compression or extension, lateral deflection and angular motion.
Working Principle:
Two spherical structures are connected in series, significantly enhancing displacement compensation and angular deflection capabilities.
Function Summary:
Large displacement compensation
Superior vibration damping effect compared to single-sphere designs
Suitable for pipe misalignment
Application Scenarios:
Pump systems
High-vibration equipment connections
HVAC main pipelines
Industrial circulating water systems
| Nominal Diameter(DN) | Length L | Diameter of the centralring of the bolt | Hole diameter quantitvd | Axial displacement | Horizontal Isplacement | Angular deflection | ||
| mm | inch | mm | mm | Extension | Compression | mm | (a1+a2) | |
| 40 | 1½ | 165 | 110 | 18-4 | 30 | 50 | 45 | 35º |
| 50 | 2 | 165 | 125 | 18-4 | 30 | 50 | 45 | 35º |
| 65 | 2½ | 175 | 145 | 18-4 | 30 | 50 | 45 | 35º |
| 80 | 3 | 175 | 160 | 18-8 | 35 | 50 | 45 | 35º |
| 100 | 4 | 225 | 180 | 18-8 | 35 | 50 | 40 | 35º |
| 125 | 5 | 225 | 210 | 18-8 | 35 | 50 | 40 | 35º |
| 150 | 6 | 225 | 240 | 22-8 | 35 | 50 | 40 | 35º |
| 200 | 8 | 325 | 295 | 22-8 | 35 | 50 | 40 | 35º |
| 250 | 10 | 325 | 350 | 22-12 | 35 | 60 | 35 | 30 |
| 300 | 12 | 325 | 400 | 22-12 | 35 | 60 | 35 | 30 |
| 350 | 14 | 330 | 460 | 22-16 | 35 | 60 | 35 | 30 |
| 400 | 16 | 330 | 515 | 26-16 | 35 | 60 | 35 | 30 |
| 450 | 18 | 330 | 565 | 26-20 | 35 | 60 | 35 | 30 |
| 500 | 20 | 350 | 620 | 26-20 | 35 | 60 | 35 | 30 |
| 600 | 24 | 350 | 725 | 30-20 | 35 | 60 | 35 | 30 |
| 700 | 28 | 350 | 840 | 30-24 | 35 | 60 | 35 | 30 |
| 800 | 32 | 400 | 950 | 30-34 | 35 | 60 | 35 | 30 |
PS:The above data is for reference only and applies to sizes from DN15 to DN4000. Please contact us immediately for more details!
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