6inch PN10 PN25 Water Plant Flexible Stainless Steel Shock-absorbing Rubber Expansion Joint double sphere
Double ball rubber joint:
Used for displacement compensation, vibration reduction, noise reduction, and installation error absorption in piping systems, featuring a double corrugated design; suitable for high-pressure, large displacement, and strong vibration critical pipelines.
Advantages of Double Ball Rubber Joints
1. Superior Displacement Compensation
Three-dimensional compensation: axial ±15 mm + lateral ±10 mm + angular ±5° (under DN100 conditions)
Comparative Advantage: 40% improvement in compensation capacity compared to single-ball joints, no additional hinge brackets required
2. Excellent Vibration Damping and Noise Reduction
Vibration transmission rate ≤5% (tested data, single-ball joints approximately 15%)
Case Study: Noise levels in a power plant's pump room reduced from 95 dB to 75 dB
3. Long-Term Fatigue Resistance
Dynamic Lifespan: ≥5,000 full displacement cycles (GB/T 26121 standard)
Enhanced Design: Double-layer steel wire skeleton
Connection data table for double sphere rubber expansion joints
| Nominal diameter | Length(mm) | Axial displacement(mm) | Lateral displacement | Angular displacement |
| mm | inch | Elongation | Compression |
| 40 | 1 1/2 | 165 | 30 | 50 | 45 | 35° |
| 50 | 2 | 165 | 30 | 50 | 45 | 35° |
| 65 | 2 1/2 | 175 | 30 | 50 | 45 | 35° |
| 80 | 3 | 175 | 35 | 50 | 45 | 35° |
| 100 | 4 | 225 | 35 | 50 | 40 | 35° |
| 125 | 5 | 230 | 35 | 50 | 40 | 35° |
| 150 | 6 | 325 | 35 | 50 | 40 | 35° |
| 200 | 8 | 325 | 35 | 50 | 40 | 35° |
| 250 | 10 | 325 | 35 | 60 | 35 | 30° |
| 300 | 12 | 325 | 35 | 60 | 35 | 30° |
| 350 | 14 | 350 | 35 | 60 | 35 | 30° |
| 400 | 16 | 350 | 35 | 60 | 35 | 30° |
| 450 | 18 | 350 | 35 | 60 | 35 | 30° |
| 500 | 20 | 350 | 35 | 60 | 35 | 30° |
| 600 | 24 | 400 | 35 | 60 | 35 | 30° |
The data above is only for reference, pls contact us for exact data and price.
Displacement diagram of double ball rubber joint
Details of double ball rubber joints
Double ball rubber joint with different rubber materials
Core application areas of double ball rubber joints
1.Municipal water supply: vibration reduction at pump inlets and outlets, compensation for thermal expansion and contraction of pipes
2.Electricity/nuclear power: turbine circulating water pipes, nuclear power plant cooling systems
3.HVAC: Central air conditioning chilled water circulation, boiler steam pipes
4.Metallurgy/Mining: Blast furnace cooling systems, slurry transport pipelines
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6 Inch Double Sphere Rubber Expansion Joint PN10 PN25 Water Plant Images
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