EXPANSION JOINTS

308 / 311 Series Expansion Joints

The Original Multi-Ply Expansion Joint – Always Ask For Keflex™(Hover to reveal product features)
Keflex™ Multi-Ply Expansion Joints are the premier expansion joints in the industry. They offer the ultimate solution to piping thermal expansion problems. A wide variety of end configurations are available and pressure ratings range from vacuum to 600 PSI at room temperature.

A variety of materials are also available for any type of media, including highly corrosive acids or gases. Keflex™ Multi-Ply Expansion Joints have a softer spring rate compared to other expansion joints with the same dimensions, making them easier to install, and requiring less force to actuate in service. The inner section of the engineering brochure, accessed through the link below, highlights the advantages of the multi-ply construction.













End Fittings

  • Plate Flanges (150# or 300# drilling)

    Tie Rod Flanges (150# or 300# drilling)

  • Forge Flanges (150# or 300# drilling)

  • Van Stone Flange 150# drilling

  • Weld Ends Sch 40 or Sch 80 beveled

  • Specials - Contact Factory
  • Multi-Ply Bellows Construction

  • Safer - Layered protection

    Less end load

  • Stronger

  • Longer Cycle Life

  • Easier movement        
  • Shoulders

  • Prevent bellows from inverting backwards during compression
  • Tie Rods with Spacers (Optional)

  • Prevent over-elongation

    Prevent over-compression
  • Internal Stainless Steel Liner

  • Provides insulating effect to reduce the temperature on the bellows and increase service life

    Insures smooth channel flow

  • Reduces the action of abrasive particles on the bellows

  • Adds stability

  • Reduces the detrimental effect of flow induced vibration
  • 308 / 311 Series Expansion Joint Documentation

    BROCHURE EXPANSION JOINT CAPABILITIES INSTALLATION INSTRUCTIONS
    SUBMITTALS - 308 SERIES SUBMITTALS - 311 SERIES
    308 Series (No Shroud) Single 150# Expansion Joint 311 Series (Shrouded) Single 150# Expansion Joint
    Plate Flange Ends 1" Travel Plate Flange Ends 1" Travel
    Plate Flange Ends 2" Travel Plate Flange Ends 2" Travel
    Plate Flange Ends 3" Travel Plate Flange Ends 3" Travel
    Plate Flange Ends 4" Travel Plate Flange Ends 4" Travel
    Pipe Weld Ends 1" Travel Pipe Weld Ends 1" Travel
    Pipe Weld Ends 2" Travel Pipe Weld Ends 2" Travel
    Pipe Weld Ends 3" Travel Pipe Weld Ends 3" Travel
    Pipe Weld Ends 4" Travel Pipe Weld Ends 4" Travel
    Pipe Grooved Ends 1" Travel Pipe Grooved Ends 1" Travel
    Pipe Grooved Ends 2" Travel Pipe Grooved Ends 2" Travel
    Pipe Grooved Ends 3" Travel Pipe Grooved Ends 3" Travel
    Pipe Grooved Ends 4" Travel Pipe Grooved Ends 4" Travel
    Plate Flange Ends w/Tie Rods 1" Travel Plate Flange Ends w/Tie Rods 1" Travel
    Plate Flange Ends w/Tie Rods 2" Travel Plate Flange Ends w/Tie Rods 2" Travel
    Plate Flange Ends w/Tie Rods 3" Travel Plate Flange Ends w/Tie Rods 3" Travel
    Plate Flange Ends w/Tie Rods 4" Travel Plate Flange Ends w/Tie Rods 4" Travel
    Pipe Weld Ends w/Tie Rods 1" Travel Pipe Weld Ends w/Tie Rods 1" Travel
    Pipe Weld Ends w/Tie Rods 2" Travel Pipe Weld Ends w/Tie Rods 2" Travel
    Pipe Weld Ends w/Tie Rods 3" Travel Pipe Weld Ends w/Tie Rods 3" Travel
    Pipe Weld Ends w/Tie Rods 4" Travel Pipe Weld Ends w/Tie Rods 4" Travel
    308 Series (No Shroud) Dual 150# Expansion Joint 311 Series (Shrouded) Dual 150# Expansion Joint
    Plate Flange Ends w/Center Base 2" Travel Plate Flange Ends w/Center Base 2" Travel
    Plate Flange Ends w/Center Base 4" Travel Plate Flange Ends w/Center Base 4" Travel
    Plate Flange Ends w/Center Base 6" Travel Plate Flange Ends w/Center Base 6" Travel
    Plate Flange Ends w/Center Base 8" Travel Plate Flange Ends w/Center Base 8" Travel
    Pipe Weld Ends w/Center Base 2" Travel Pipe Weld Ends w/Center Base 2" Travel
    Pipe Weld Ends w/Center Base 4" Travel Pipe Weld Ends w/Center Base 4" Travel
    Pipe Weld Ends w/Center Base 6" Travel Pipe Weld Ends w/Center Base 6" Travel
    Pipe Weld Ends w/Center Base 8" Travel Pipe Weld Ends w/Center Base 8" Travel
    Plate Flange Ends w/Tie Rods 2" Travel Plate Flange Ends w/Tie Rods 2" Travel
    Plate Flange Ends w/Tie Rods 4" Travel Plate Flange Ends w/Tie Rods 4" Travel
    Plate Flange Ends w/Tie Rods 6" Travel Plate Flange Ends w/Tie Rods 6" Travel
    Plate Flange Ends w/Tie Rods 8" Travel Plate Flange Ends w/Tie Rods 8" Travel
    Pipe Weld Ends w/Tie Rods 2" Travel Pipe Weld Ends w/Tie Rods 2" Travel
    Pipe Weld Ends w/Tie Rods 4" Travel Pipe Weld Ends w/Tie Rods 4" Travel
    Pipe Weld Ends w/Tie Rods 6" Travel Pipe Weld Ends w/Tie Rods 6" Travel
    Pipe Weld Ends w/Tie Rods 8" Travel Pipe Weld Ends w/Tie Rods 8" Travel
    308 Series (No Shroud) Single 300# Expansion Joint 311 Series (Shrouded) Single 300# Expansion Joint
    Plate Flange Ends 1" Travel Plate Flange Ends 1" Travel
    Plate Flange Ends 2" Travel Plate Flange Ends 2" Travel
    Plate Flange Ends 3" Travel Plate Flange Ends 3" Travel
    Pipe Weld Ends 1" Travel Pipe Weld Ends 1" Travel
    Pipe Weld Ends 2" Travel Pipe Weld Ends 2" Travel
    Pipe Weld Ends 3" Travel Pipe Weld Ends 3" Travel
    Plate Flange Ends w/Tie Rods 1" Travel Plate Flange Ends w/Tie Rods 1" Travel
    Plate Flange Ends w/Tie Rods 2" Travel Plate Flange Ends w/Tie Rods 2" Travel
    Plate Flange Ends w/Tie Rods 3" Travel Plate Flange Ends w/Tie Rods 3" Travel
    Pipe Weld Ends w/Tie Rods 1" Travel Pipe Weld Ends w/Tie Rods 1" Travel
    Pipe Weld Ends w/Tie Rods 2" Travel Pipe Weld Ends w/Tie Rods 2" Travel
    Pipe Weld Ends w/Tie Rods 3" Travel Pipe Weld Ends w/Tie Rods 3" Travel
    308 Series (No Shroud) Dual 300# Expansion Joint 311 Series (Shrouded) Dual 300# Expansion Joint
    Plate Flange Ends 2" Travel Plate Flange Ends 2" Travel
    Plate Flange Ends 4" Travel Plate Flange Ends 4" Travel
    Plate Flange Ends 6" Travel Plate Flange Ends 6" Travel
    Pipe Weld Ends 2" Travel Pipe Weld Ends 2" Travel
    Pipe Weld Ends 4" Travel Pipe Weld Ends 4" Travel
    Pipe Weld Ends 6" Travel Pipe Weld Ends 6" Travel
    Plate Flange Ends w/Tie Rods 2" Travel Plate Flange Ends w/Tie Rods 2" Travel
    Plate Flange Ends w/Tie Rods 4" Travel Plate Flange Ends w/Tie Rods 4" Travel
    Plate Flange Ends w/Tie Rods 6" Travel Plate Flange Ends w/Tie Rods 6" Travel