Expansion Joints

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Garlock Expansion Joints offer superior performance, reliability, and service life, resulting in improved plant safety and increased mechanical integrity of equipment. As specifically engineered products that are inserted in a rigid piping system, Garlock Rubber Expansion Joints will:

  • Absorb movement
  • Improve thermal stability
  • Relieve system strain due to thermal change, load stress, pumping surges, wear of settling
  • Reduce mechanical noise
  • Compensate for misalignment
  • Eliminate electrolysis between dissimilar metals

All of Garlock expansion joints carry safety ratings that exceed product specifications in areas such as pressure and movement. Non-metallic expansion joints and flexible couplings are ideally suited for a wide variety of industries.]

Piping Expansion Joints

Expansion joints for piping systems are flexible connectors, made out of PTFE, natural or synthetic elastomers, with combinations of rubber, fabric and metal reinforcement.  Expansion joints installed into piping systems will help solve problems such as:

  • Stresses – expansion joints absorb movement due to thermal expansion and contraction of pipes, wear, load stresses and settling of supports and foundations
  • Misalignment – custom expansion joints can be manufactured with offsets to account for installation errors in pipe alignment, or for movement and settling over time
  • Abrasion – with proprietary elastomers such as ABRA-LINE, abrasion can be significantly reduced compared to other rubber or metallic connectors
  • Vibration – rubber expansion joints significantly reduce vibration when installed in proper locations and are not subject to metal fatigue failure
  • Noise – transmission of sound is reduced as the expansion joint acts as a dampener and absorbs the noise levels
  • Shock – effects of pressure surges, water hammer, or pump cavitation are resisted
  • Corrosion – no metal to metal contact eliminating electrolysis between dissimilar metals
  • Space – greatly reduced space required compared to expansion bends or loops

For critical chemical applications, only Garlock offers a mechanically bonded GUARDIAN FEP Liner, eliminating the common failures of delamination in PTFE lined expansion joints.  Available for Style 204 and Style 206 designs.

For abrasive applications, only Garlock offers expansion joints with an ABRA-LINE tube, offering superior abrasion resistance compared to other elastomers.  Available for Style 204, Style 206, and Style 7250 designs.

For other applications, Garlock offers a wide variety of elastomers to suit the demands required and can be configured into most Style 204, Style 206, and Style 7250 designs.

For other variant of Piping Expansion Joints, click this link for more information:  https://www.garlock.com/en/products/pipe-expansion-joints

Ducting & Low Pressure Expansion Joints

Ducting and low pressure expansion joints are lightweight flexible connectors designed for gaseous media made out of natural or synthetic elastomers, with combinations of rubber and fabric reinforcement especially for scrubbers, precipitators, baghouses, and fans in air handling systems.  Ducting expansion joints will help solve problems such as:

  • Stresses – expansion joints absorb movement due to thermal expansion and contraction of ducting
  • Misalignment – the lightweight and highly flexible nature of the expansion joints installs easily and compensates for installation tolerances in duct alignment, or for movement and settling over time
  • Noise – transmission of sound is reduced as the expansion joint acts as a dampener and absorbs the noise levels
  • Vibration – rubber expansion joints significantly reduce vibration when installed in proper locations and are not subject to metal fatigue failure

Similar low pressure expansion joints are often found in gravity fed applications in the connections of hoppers, silos, shaker tables, vibratory conveyors, and bowl feeders where large amounts of movement with minimal resistance is required.  High quality, premium connectors in these applications help improve process efficiency by reducing material loss, foreign contamination, and replacement frequency.  The flanged and sleeve connectors allow for easily installation and improve airborne and physical hazards associated with media leaking outside of these processes.  Low pressure expansion joints also help solve problems such as:

Abrasion – with proprietary elastomers such as ABRA-LINE, abrasion can be significantly reduced compared to other rubber or metallic connectors

Corrosion – no metal to metal contact eliminating electrolysis between dissimilar metals

Optional metal reinforcement in Style 9394 Expansion Joints allow for a high level of flexibility and movement along with greater pressure and vacuum capabilities typically found in standard ducting expansion joints.

For other variant of Ducting & Low Pressure Expansion Joints, click this link for more information: https://www.garlock.com/en/products/flue-duct-low-pressure-applications

Common Accessories for Expansion Joints

Garlock rubber expansion joint accessories include retaining rings, control units/tie rods, and metal flow liners.

Click this link for more information on the expansion joint accessories: https://www.garlock.com/en/products/common-accessories-expansion-joints

Click Download tab to view catalogue or brochure OR click the above link for the respective product for more information.

Click Download tab to view catalogue or brochure OR click the above link for the respective product for more information.

Piping Expansion Joints

  • Style 204 Narrow Arch Expansion Joint
  • EZ-FLO® Style 206
  • SURE-LINK™
  • GARFLEX® Style 8100
  • Style 7250 FLEXO-MATIC®
  • Style 7706 S-Type

Ducting & Low Pressure Expansion Joints

  • Style 8400
  • Style 9394
  • Style 207
  • Style 208
  • Style 8420 Split™

Common Accessories for Expansion Joints

  • Control Units/Tie Rods
  • Metal Flow Liners
  • Metal Retaining Rings