DFS Type expansion joints

These expansion joints allow for reduced vibration in fluid, slurry, and/or gas transportation or piping systems under pressure or vacuum at varying temperatures.

Product Description

Features:
  • Transportation or piping systems that carry fluids, slurries or gasses under pressure or vacuum at varying temperatures
  • Reduction of vibration
  • Dampen sound transmission
  • Compensate movements due thermal changes, misalignments caused by wear, load stresses, settling of supporting foundations
  • Molding and manual production.
  • Standard measures (length)
Benefits:
  • Easy installation
  • Flanges are not in contact with medium, which enables lower grade material
  • Galvanic surfaces / coatings possible
  • Gaskets can be eliminated
  • Additional movement capabilities
  • Special measures (length, diameter, flanges) → custom made
  • Different models (hose, reduction, multiple arches, filled arch, spool, …)
  • Higher design pressure
  • Special designs (spring rates, different inner and outer layers)
 

DFS type with tie rods

ITEMDESIGNATION
1Rubber bellows
2Flanges
3Reinforcement ring
4Loose brackets
5Tie rods
6Nuts
7Spherical washers

Technical Specifications

Operating range:

Diameter: DN 25 ... DN 3000 (1" ... 120")
Pressure as per request
Temperature up to 180 °C (356 °F)
Movements: all directions

Materials:
  • Bellows: Various elastomers such as EPDM, EPDM Food Grade, Neoprene, Nitrile, Hypalon, Butyl, Viton
  • Flanges: carbon steel and stainless steel.

Other materials are available on request.

Standards and approvals:

NDT and documentation: Can be provided per customer request e.g. Material Certificates and NDT test reports.

Recommended applications:
  • Air conditioning, heating and ventilating systems in industrial buildings and vessels
  • Central and ancillary power generating stations in industrial buildings, factories, ships and offshore applications
  • Sewage disposal and water treatment plant, pumps, etc.
  • Process piping in pulp and paper plants
  • Piping systems for chilled or hot water
  • Cooling systems for power generation
  • Feed water and draining lines for water works, sewage, sanitary piping systems etc.
  • Oil lines for industrial plants, shipyards, phosphate plants etc.