DN32 Double Spheres Threaded Connection Rubber Expansion Joint Connector
DN32 1 1/4 ''
The DN32 Double Spheres Threaded Connection Rubber Expansion Joint Connector is a high-performance flexible piping component engineered to absorb vibration, compensate for misalignment, and accommodate thermal expansion in pipeline systems. Designed with a nominal diameter of DN32 (approximately 1¼ inches), this connector is widely used in HVAC systems, water supply networks, industrial process piping, and pumping stations where reliable flexibility and durability are essential.
Delivery
FOB
minimum order
5 pieces
Supply Ability
100pieces / Month
Country of Origin
China
Stock Time
30Day
Quantity:
US $1.00 - US $200.00 / pieces
Construction and Materials
The connector features a double-sphere (twin-sphere) rubber body molded from premium-quality elastomers such as EPDM, NBR, or neoprene, selected according to the media being conveyed. EPDM offers excellent resistance to hot water, steam, and weathering, while NBR provides superior resistance to oils and fuels. The double-sphere design delivers greater flexibility and a larger movement range compared to single-sphere joints, allowing simultaneous absorption of axial, lateral, and angular displacements.
Both ends are fitted with threaded connections—typically female BSPP, BSPT, or NPT threads—manufactured to precise tolerances for secure, leak-free installation with standard pipe fittings. Embedded within the rubber body are high-strength reinforcing rings (usually galvanized steel or stainless steel), which prevent deformation under pressure and extend service life. The flanges or threaded unions are often constructed from ductile iron or carbon steel with anti-corrosion coatings.
Performance Characteristics
This expansion joint is designed to withstand working pressures typically up to 16 bar (PN16), depending on size and configuration, and can handle operating temperatures ranging from -15°C to 120°C for EPDM constructions (NBR variants may differ). The double-sphere architecture provides excellent noise and vibration dampening, reducing structural-borne sound transmission in piping systems. It effectively compensates for pipeline movement caused by thermal fluctuations, foundation settlement, or seismic activity, thereby protecting pumps, valves, and other equipment from stress and premature failure.
Key Features
Double-sphere design for enhanced flexibility and multi-directional movement absorption
Threaded end connections for quick and easy installation without welding
High-strength reinforcing rings for pressure resistance and dimensional stability
Excellent vibration isolation and noise reduction
Corrosion-resistant materials suitable for diverse media
Compact, lightweight construction reducing pipe support requirements
Available in various elastomer options to suit different applications
Applications
The DN32 double-sphere threaded rubber expansion joint is ideal for use in chilled and hot water circulation systems, domestic water supply lines, sewage and drainage piping, fire protection systems, compressed air networks, and general industrial fluid handling. It is particularly suited to confined spaces where angular and lateral flexibility is needed, and where threaded connections simplify assembly and maintenance.
Installation Notes
Proper installation ensures optimal performance and longevity. The joint should be installed in the pipeline without excessive torsional stress, and the threaded connections should be tightened to the recommended torque to prevent leakage. It is advisable to use pipe guides and anchors to control movement and prevent over-extension. The connector should not be painted or coated with materials that could degrade the rubber, and exposure to direct sunlight or ozone should be minimized in outdoor installations. Regular inspection for signs of wear, cracking, or deformation is recommended to maintain system integrity.
Summary
Combining robust construction, versatile elastomer options, and a double-sphere geometry that excels at multi-axis movement absorption, the DN32 Double Spheres Threaded Connection Rubber Expansion Joint Connector delivers reliable performance in a compact, easy-to-install package. It is an essential component for engineers and contractors seeking to protect piping systems, reduce vibration, and extend equipment life across a broad range of fluid-handling applications.
The connector features a double-sphere (twin-sphere) rubber body molded from premium-quality elastomers such as EPDM, NBR, or neoprene, selected according to the media being conveyed. EPDM offers excellent resistance to hot water, steam, and weathering, while NBR provides superior resistance to oils and fuels. The double-sphere design delivers greater flexibility and a larger movement range compared to single-sphere joints, allowing simultaneous absorption of axial, lateral, and angular displacements.
Both ends are fitted with threaded connections—typically female BSPP, BSPT, or NPT threads—manufactured to precise tolerances for secure, leak-free installation with standard pipe fittings. Embedded within the rubber body are high-strength reinforcing rings (usually galvanized steel or stainless steel), which prevent deformation under pressure and extend service life. The flanges or threaded unions are often constructed from ductile iron or carbon steel with anti-corrosion coatings.
Performance Characteristics
This expansion joint is designed to withstand working pressures typically up to 16 bar (PN16), depending on size and configuration, and can handle operating temperatures ranging from -15°C to 120°C for EPDM constructions (NBR variants may differ). The double-sphere architecture provides excellent noise and vibration dampening, reducing structural-borne sound transmission in piping systems. It effectively compensates for pipeline movement caused by thermal fluctuations, foundation settlement, or seismic activity, thereby protecting pumps, valves, and other equipment from stress and premature failure.
Key Features
Double-sphere design for enhanced flexibility and multi-directional movement absorption
Threaded end connections for quick and easy installation without welding
High-strength reinforcing rings for pressure resistance and dimensional stability
Excellent vibration isolation and noise reduction
Corrosion-resistant materials suitable for diverse media
Compact, lightweight construction reducing pipe support requirements
Available in various elastomer options to suit different applications
Applications
The DN32 double-sphere threaded rubber expansion joint is ideal for use in chilled and hot water circulation systems, domestic water supply lines, sewage and drainage piping, fire protection systems, compressed air networks, and general industrial fluid handling. It is particularly suited to confined spaces where angular and lateral flexibility is needed, and where threaded connections simplify assembly and maintenance.
Installation Notes
Proper installation ensures optimal performance and longevity. The joint should be installed in the pipeline without excessive torsional stress, and the threaded connections should be tightened to the recommended torque to prevent leakage. It is advisable to use pipe guides and anchors to control movement and prevent over-extension. The connector should not be painted or coated with materials that could degrade the rubber, and exposure to direct sunlight or ozone should be minimized in outdoor installations. Regular inspection for signs of wear, cracking, or deformation is recommended to maintain system integrity.
Summary
Combining robust construction, versatile elastomer options, and a double-sphere geometry that excels at multi-axis movement absorption, the DN32 Double Spheres Threaded Connection Rubber Expansion Joint Connector delivers reliable performance in a compact, easy-to-install package. It is an essential component for engineers and contractors seeking to protect piping systems, reduce vibration, and extend equipment life across a broad range of fluid-handling applications.
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