DN200 Double Spheres Floating Flanged Rubber Expansion Joint
DN32-DN600
The DN200 Double Spheres Rubber Expansion Joint is a high-performance flexible connector engineered to absorb multi-directional pipeline movements, reduce vibration and noise, and compensate for misalignment in piping systems. Featuring a dual-sphere (double arch) design with floating flanges (Vanstone type), this joint delivers superior movement absorption capacity and lower spring rates compared to single-sphere alternatives, making it an ideal solution for demanding industrial, municipal, and marine applications.
Delivery
FOB
minimum order
5 pieces
Supply Ability
100pieces / Month
Country of Origin
China
Stock Time
30Day
Quantity:
US $100.00 - US $10000.00 / pieces
## Key Features & Benefits
**Enhanced Movement Compensation** – The double-sphere architecture provides approximately double the axial compression/extension capacity and significantly greater lateral and angular movement capabilities compared to single-sphere joints. This is particularly critical for long-distance pipelines and systems subject to thermal expansion or structural settlement. For DN200 size, typical allowable movements include axial compression up to 25-60 mm, axial elongation up to 35 mm, transverse deflection up to 35-40 mm, and angular deflection ranging from 15° to 35°.
**Floating Flange System** – The 360° rotatable floating flanges (Vanstone type) eliminate bolt hole alignment difficulties during installation, significantly reducing labor time and simplifying contractor work on complex pipe racks. The flanges are available in multiple material options including mild steel (electroplated), stainless steel 304, or carbon steel galvanized, allowing selection based on environmental conditions.
**Superior Flow Dynamics** – The smooth, continuous double-arch profile minimizes turbulence, reduces pressure drop, and prevents sediment accumulation through a self-cleaning scouring action. This feature is essential for maintaining efficiency in water and wastewater systems.
**Robust Reinforced Construction** – Built with multiple layers of high-tensile nylon cord fabric embedded within the elastomer body, plus an internal steel reinforcing ring at the flange interface and full-arch steel wire reinforcement, the joint provides exceptional resistance to internal pressure, vacuum conditions, and pull-off forces.
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## Technical Specifications
The DN200 model (8 inch nominal size) features floating flange connections (Vanstone type) compatible with standard flange drillings including ANSI 150, PN16, JIS 10K, and Table E. Flange materials can be selected from mild steel (electroplated), stainless steel 304, or carbon steel galvanized, while rubber compounds are available in EPDM, NBR, Neoprene, or Natural Rubber based on service conditions.
For EPDM compound, the operating temperature range spans from -30°C to +110°C, with short-term capability up to 130°C. The joint sustains a working pressure of up to 16 bar (232 psi) and maintains vacuum rating up to 650-750 mmHg. Reinforcement consists of high-tensile nylon cord fabric combined with steel wire arch reinforcement for maximum durability.
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## Advantages Over Metal Expansion Joints
Compared to metal expansion joints, the rubber design offers greater movement capacity while absorbing a more comprehensive range of pipeline movements. Elastomers are not subject to fatigue breakdown or embrittlement, ensuring longer service life under cyclic loading. The thick rubber construction provides superior vibration and sound damping, effectively isolating noise and mechanical shock. The joint also withstands harsh environments and erosive media with excellent corrosion and abrasion resistance. Additionally, its lightweight nature and integral flanges eliminate the need for separate gaskets, simplifying handling and installation.
---
**Enhanced Movement Compensation** – The double-sphere architecture provides approximately double the axial compression/extension capacity and significantly greater lateral and angular movement capabilities compared to single-sphere joints. This is particularly critical for long-distance pipelines and systems subject to thermal expansion or structural settlement. For DN200 size, typical allowable movements include axial compression up to 25-60 mm, axial elongation up to 35 mm, transverse deflection up to 35-40 mm, and angular deflection ranging from 15° to 35°.
**Floating Flange System** – The 360° rotatable floating flanges (Vanstone type) eliminate bolt hole alignment difficulties during installation, significantly reducing labor time and simplifying contractor work on complex pipe racks. The flanges are available in multiple material options including mild steel (electroplated), stainless steel 304, or carbon steel galvanized, allowing selection based on environmental conditions.
**Superior Flow Dynamics** – The smooth, continuous double-arch profile minimizes turbulence, reduces pressure drop, and prevents sediment accumulation through a self-cleaning scouring action. This feature is essential for maintaining efficiency in water and wastewater systems.
**Robust Reinforced Construction** – Built with multiple layers of high-tensile nylon cord fabric embedded within the elastomer body, plus an internal steel reinforcing ring at the flange interface and full-arch steel wire reinforcement, the joint provides exceptional resistance to internal pressure, vacuum conditions, and pull-off forces.
---
## Technical Specifications
The DN200 model (8 inch nominal size) features floating flange connections (Vanstone type) compatible with standard flange drillings including ANSI 150, PN16, JIS 10K, and Table E. Flange materials can be selected from mild steel (electroplated), stainless steel 304, or carbon steel galvanized, while rubber compounds are available in EPDM, NBR, Neoprene, or Natural Rubber based on service conditions.
For EPDM compound, the operating temperature range spans from -30°C to +110°C, with short-term capability up to 130°C. The joint sustains a working pressure of up to 16 bar (232 psi) and maintains vacuum rating up to 650-750 mmHg. Reinforcement consists of high-tensile nylon cord fabric combined with steel wire arch reinforcement for maximum durability.
---
## Advantages Over Metal Expansion Joints
Compared to metal expansion joints, the rubber design offers greater movement capacity while absorbing a more comprehensive range of pipeline movements. Elastomers are not subject to fatigue breakdown or embrittlement, ensuring longer service life under cyclic loading. The thick rubber construction provides superior vibration and sound damping, effectively isolating noise and mechanical shock. The joint also withstands harsh environments and erosive media with excellent corrosion and abrasion resistance. Additionally, its lightweight nature and integral flanges eliminate the need for separate gaskets, simplifying handling and installation.
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