PTFE Spool-Type Flexible Couplings

These PTFE concentric spool-type flexible couplings are designed to reduce noise and compensate for expansion, contraction, and minor piping misalignment in chemical processing, air conditioning, and heating systems. Style 214 has 2 convolutions, while Style 215 has 3 convolutions.

Regional Availability Restrictions: 
Not available in Europe

Features and Benefits

  • Convolution shape provides extra-long flex life at high temperatures
  • Proprietary contour molding process ensures consistent wall thickness for blowout resistance
  • PTFE body withstands corrosion, water, steam, and most chemicals and gases
  • Higher pressure and temperature ratings mean extended service life in most piping systems
  • Preset restriction bolts prevent over-extension
  • Available silicone-free


  • Min. Temperature: -100°F / -70°C
  • Max. Temperature: 450°F / 230°C
  • Max. Pressure (Style 214): 178psi / 12bar
  • Max. Pressure (Style 215): 132psi / 9 bar
  • Max. Inner Diameter: 8in. / 200mm

Additional Information


  • Complete assembly includes fluorocarbon resin PTFE body, plated ductile iron flanges, polyethylene-covered restriction bolts, and corrosion-resistant reinforcing rings
  • Standard sizes from 1in / 25 mm through 8in / 200 mm pipe ID

PTFE Control Units and Flanges

All PTFE joints and couplings are furnished with ductile iron flanges and control units ready for immediate installation on the job site. Flanges in other alloys are available by special order.

  • Flanges are protected to resist atmosphere corrosion and are tapped to 150 Ibs. ANSI Standard drilling.
  • Control units are assembled with flanges to prevent joints from excessive axial elongation. They are designed to accept the static pressure thrust in the piping system.
  • Tie rods are set at the factory at the maximum face-to-face working limits, with lock nuts as insurance against overextension of the expansion joint. The tie rods are covered with polyethylene to eliminate metal-to-metal contact between the rods and flanges-the most frequent cause of noise transmission and electrolysis.

Pressure and Vacuum Rating

Garlock PTFE expansion joints and couplings have pressure ratings high enough to handle most applications. As the pipe size gets larger, Garlock increases the bellows thickness and the strength of the reinforcing rings to compensate for the change in internal forces. This permits the same high pressure.

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