D 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 production with long radius arch
  • Standard measures (length)
Benefits:
  • Easy installation, flanges can be rotated
  • For installation with “torsional misalignments”
  • Flanges are not in contact with medium, which enables lower grade material
  • Galvanic surfaces/ coatings possible
  • Gaskets can be eliminated
  • Additional movement capabilities
  • Self cleaning arch (no need filler material)
  • Economic
 
ITEMDESCRIPTION
1Rubber bellows
2Flanges
3Reinforcement ring
4Loose bracket
5Tie rods
6Nuts
7Spherical washers

Technical Specifications

Operating range:

Diameter: DN 25 ... DN 750 (1" ... 30"),
Pressure up to 16 bar (232 PSI)
Temperature up to 110 °C (230 °F)
Movements: all directions

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

Other materials available upon 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.