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FLEX-TEND® Force Balanced Flexible Expansion Joints

Brand: EBAA Iron, Inc

FLEX-TEND Force Balanced Flexible Expansion Joints are designed to protect water pipeline systems from the stresses produced by ground motion either from seismic activity or gradual soil subsidence. 

The Force Balanced FLEX-TEND unlike conventional flexible/expansion joints does not generate an axial thrust that must be compensated for.
Available in sizes 3 inch through 48 inch.
Features
  • Sizes 3 inch through 48 inch
    • Sizes 3 inch through 16 inch rated at 350 PSI
    • Sizes 18 inch and above rated at 250 PSI
  • For Ductile Iron, Steel, PVC or HDPE pipe
  • Expansion unit will NOT impart a thrust force while under internal pressure
  • Designed to give Deflection and or Expansion/ Contraction needs to protect pipeline systems from shear. Refer to submittal drawings for “offset” capability
  • Constructed of ASTM A536 Ductile Iron
  • Up to 20° Deflection per ball
  • Each unit tested to rated working pressure prior to shipment
  • Due to the design of the seals, no periodic maintenance is required
  • End connections:
    • Flanged; 3 inch through 48 inch
    • Mechanical Joint; 3 inch through 24 inch
  • Flange outlets conform to the dimensional requirements of ANSI/AWWA C110/A21.10 (class 150) with the addition of an O-ring gasket which is provided to ensure a watertight seal
  • Mechanical Joint end connections conform to the dimensional requirements of either ANSI/AWWA C111/A21.11 or ANSI/AWWA C153/A21.53 depending on size
  • FLEX-TEND assemblies are suitable for direct burial. Polyethylene wrap is provided with each unit. If installed in a vault, the design must be such that movement is not impeded
  • NOT for use on pipelines containing solids and debris

Specifications

Nominal Pipe Size

  • 3" to 54"

Pressure Rating

  • 350 psi
  • 250 psi

Certifications & Approvals

  • FM

  • Potable or Non-Potable Water (No Solids or Debris)
  • Fire Service Mains
  • Fire Sprinkler Systems
  • Chilled or Heated Water Systems (HVAC)
  • Above or Below Ground

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