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UNA-FLEX Universal Tied


  • Working pressure up to 150 PSI
  • UNA-FLEX universal tied expansion joints are capable of absorbing greater lateral movements than standard bellows type expansion joints
  • Working temperature 500degess F
  • Bellows manufactured of 321 stainless steel
  • Available with optional liners or covers
  • Assembly designed in accordance with EJMA standards


  • Nominal pipe size (in.): 2 in to 30in
  • Lateral movement  +/- (in.): 1.5 in to 3.0in
  • Overall length (in.):14 in to 60in
  • Lateral spring rate- lbs/inches: 22 to 60
  • Added movement per 1” of additional length: .188 to .073
  • Number of tie rods: 2 to 4
  • For nipple ends add to flange unit overall length: 4 to 10

View Specifications Chart

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