Twin Sphere Union Rubber Expansion Joint

MAXWOR twin sphere union rubber expansion joint solutions are flexible compensator systems developed for compact installations, featuring a double-bellows elastomer structure combined with a union-type threaded connection design.

The double-sphere structure provides high movement capacity, while the union connection system allows quick disassembly and reassembly. This makes it a practical and cost-effective solution, especially in systems requiring frequent maintenance and in confined mechanical spaces.

It absorbs vibration, thermal expansion, and mechanical stresses generated at pump, equipment, and piping connections, improving system safety and extending equipment service life.

Technical Specifications

Design and Operating Principle

Twin sphere union rubber expansion joint designs are optimized with a double-bellows elastomer body structure to absorb axial, lateral, and angular movements.

The union-type threaded connection system eliminates the need for flanges, enabling quick installation and easy disassembly. This provides a significant advantage in piping systems where maintenance and replacement operations are frequent.

The flexible elastomer body dampens vibration, shock, and mechanical loads, reducing stress on pump and equipment connections. Its compact and lightweight design ensures easy use in space-restricted systems.

Performance Advantages

  • Enables quick installation and easy disassembly
  • Provides flange-free connection advantage
  • Reduces maintenance time
  • Higher movement capacity compared to single sphere models
  • Effectively reduces vibration and noise
  • Protects pump and equipment connections
  • Suitable for compact installation areas
  • Low maintenance requirement

Operating Values

Operating Pressure

  • Maximum 10 bar
  • (depending on DN size and threaded connection type)

Operating Temperature

  • EPDM: -20°C / +120°C
  • NBR: -10°C / +100°C
  • Neoprene: -20°C / +100°C
  • Viton: -10°C / +180°C

Movement Capabilities

  • Axial Movement: ±20 mm – 30 mm
  • Lateral Movement: ±15 mm – 25 mm
  • Angular Movement: 8° – 12°

Note: Movement and operating values may vary depending on product diameter (DN), threaded connection type, and elastomer selection.

Design & Material

In twin sphere union rubber expansion joint designs, the elastomer body is optimized to provide high flexibility, vibration damping performance, and long service life.

Elastomer Options

  • EPDM
  • NBR
  • Neoprene
  • Viton
  • Hypalon

Union Connection Options

  • Cast iron
  • Carbon steel
  • Stainless steel

Reinforcement Structure

Nylon cord–reinforced elastomer body

Thread Standards

  • BSP
  • NPT
  • (Custom connections upon request)

Production is project-specific and optimized according to operating temperature, pressure, fluid type, and movement requirements.

Applications

  • HVAC systems
  • Pump and equipment connections
  • Cooling and heating installations
  • Compact mechanical rooms
  • Water and process lines
  • Industrial facility applications

Application Areas

Documents

Quotation Form