DN100 Double Spheres Floating Flanged Rubber Expansion Joint

DN100-DN700
The DN100 Double Sphere Floating Flanged Rubber Expansion Joint is a high-performance flexible connector designed for modern piping systems. Engineered with a dual-sphere architecture and equipped with freely rotating floating flanges, this joint provides superior vibration absorption, noise reduction, and multi-directional movement compensation. It is an essential component for protecting pumps, valves, and associated equipment in industrial, commercial, and municipal applications.
Delivery
FOB
minimum order
1 piece
Supply Ability
100piece / Month
Country of Origin
China
Stock Time
30Day
Quantity:
US $1.00 - US $500.00 / piece
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Key Features & Design Advantages
Enhanced Dual-Sphere Architecture – The double-sphere design delivers significantly greater axial, lateral, and angular displacement capacity compared to single-sphere alternatives. This increased flexibility effectively accommodates thermal expansion, pipe settlement, and installation misalignments while reducing stress transmission to connected equipment.
Floating Flange Connection – The joint features independently rotating flanges that simplify bolt-hole alignment during installation, eliminating the need for forced adjustments. This design substantially reduces installation time and prevents damage from over-torquing or misalignment.
Multi-Layer Reinforced Construction – The rubber body is built with an inner liner, multiple layers of high-tensile nylon cord fabric reinforcement, and an outer cover, all vulcanized into a unified structure. Embedded steel retaining rings at the flange interface provide mechanical strength and prevent pull-out under pressure surges or vacuum conditions.
Superior Flow Dynamics – The smooth, continuous double-arch internal profile minimizes turbulence and pressure drop while promoting self-cleaning action that prevents sediment accumulation, making it particularly suitable for water and wastewater systems.
Materials & Specifications (DN100 / 4")
The DN100 size joint offers the following typical performance parameters:
Nominal Diameter: DN100 (4 inches)
Overall Length: 150 – 225 mm (varies by design standard)
Axial Displacement: Extension up to 10 mm, Compression up to 19 mm
Horizontal Displacement: Up to 13 mm
Angular Deflection: Up to 15° – 35° (depending on model)
Working Pressure: Up to 1.6 MPa (PN16) / 150 PSI
Temperature Range: -20°C to +120°C for EPDM; special materials available for extreme conditions
Material Options
Rubber Body: EPDM (excellent for water, hot water, steam, weathering), NBR (oil-resistant), or Natural Rubber
Reinforcement Layers: High-tensile nylon cord fabric
Flanges: Carbon steel (electroplated) or Stainless Steel 304, with standards available in ANSI, JIS, DIN, and GB
Performance Benefits
Vibration & Noise Reduction – The elastic rubber body effectively isolates mechanical vibration from pumps, compressors, and other rotating equipment, significantly reducing structure-borne noise transmission.
Multi-Directional Compensation – The joint simultaneously compensates for axial extension/compression, lateral (transverse) movement, and angular deflection, accommodating complex pipe movements in a single component.
Electrolysis Prevention – The non-metallic rubber body electrically isolates dissimilar metals in the piping system, preventing galvanic corrosion.
Zero Leakage Seal – Properly installed, the joint provides reliable sealing performance under pressure, with the floating flange design ensuring even gasket compression.
Summary
The DN100 Double Sphere Floating Flanged Rubber Expansion Joint offers a robust, cost-effective solution for managing pipe movement, reducing vibration, and ensuring reliable operation across a broad spectrum of industrial and municipal applications. Its dual-sphere design, reinforced construction, and versatile material options make it a dependable choice for demanding piping systems.