Bachmann manufactures high performance expansion joints in such materials as stainless steel, nickel, inconel, incoloy, hastelloy, titanium, monel, and other sophisticated alloys.

Round: Convoluted bellows are made up to thirty feet in diameter in either single or laminated-wall construction, and are custom-engineered into any expansion joint system design, including externally-pressurized, pressure-balanced, hinged, gimballed, and articulated systems.

Rectangular: Camera-corner, mitered corner or round-corner expansion joints combine super flexibility, high life cycles, low-stress corner junctions, low spring rate, and unlimited sizes, in many configurations. Units can be designed to absorb both axial and lateral movements. Metallic joints can be designed to accommodate very high temperature applications.

BW

Type BW Axial Expansion Joint, Butt Weld Both Ends.

 

Type F Axial Expansions Joint, Flanged Both Ends

F
BWS

Type BWS Axial Expansion Joint, Butt Weld Both Ends with Internal Guide Sleeve.

Type FS Axial Expansions Joint, Flanged Both Ends with Internal Guide Sleeve.

FS
BWT

Type BWT Double Joint, Butt Weld Both Ends.

Type FT Double Joint, Flanged Both ends

FT
BWH

Type BWH Hinged Joint, Butt Weld Both Ends.

Type FH Hinged Joint, Flanged Both ends

FH
BWG

Type BWH Gimble Joint, Butt Weld Both Ends.

Type FG Gimble Joint, Flanged Both ends

FG
BWTH

Type BWTH Double Joint, Butt Weld Both Ends, Guided in One Plane.

Type FTH Double Joint, Flanged Both Ends, Guided in One Plane.

FTH
BWTU

Type BWTU Articulated Double Joint, Butt Weld Both Ends.

Type FTU Articulated Double Joint, Flanged Both Ends.

FTU
BWE

Type BWE Axial Expansion Joint, Bellows Under External Pressure, Butt Weld Both Ends.

Type FE Axial Expansion Joint, Bellows Under External Pressure, Flanged Both Ends.

FE
High-temperature non-metallic expansion joints are used primarily in flue and duct systems, and depending upon the specific operating conditions, are built up of a number of insulating thermal fabric layers with an external fluoroplastic cover. These materials can withstand up to 2300º F. These composite joints are usually located where low spring rates are combined with large axial and lateral movements. These expansion joints are very economical to use and can be adapted to unique, limited space situations.
Expansion-joints-Non-metallic-02
Non-metallic, low-temperature elastomeric expansion joints are found in duct & flue systems where operating temperatures are less than 400º F. Bachmann Dampjoint uses molded or belted elastomers with non-asbestos reinforcing materials. They are more effective than other materials in these situations because of their high resistance to acid and abrasion and their ability to absorb large movements in short face-to-face dimensions.

model "U"

model "UL"

MC

model "C"

MCL

model "CL"

MAF3

model "AF Telescopic"

MAFL3

model "AF Captive liner"

• The individual expansion joint is selected on following parameters:

  • Movements in duct (axial, lateral, angular, torsion)
  • Design & Operating temperature & pressure
  • Composition & nature of the flue gas
  • Duct Orientation (Horizontal / Vertical / Inclined)
  • Gas Composition
  • Dust content, fly ash, etc.
  • Any special requirements with regards to installation

The typical expansion joint can be shown and measured as below: