GUARDIAN® 306 EZ-FLO®

FEP Lined Spool-Type Expansion Joint

Garlock® GUARDIAN® 306 EZ-FLO® spool-type expansion joints feature a self-flushing arch with an FEP lining fused to the body. The GUARDIAN® 306 EZ-FLO® is designed for the chemical processing and pulp and paper industries, where its ability to resist corrosive attack at normal or elevated temperatures and pressures is unequaled.

Regional Availability Restrictions: Not available in Europe

  • FEP liner is non-contaminating and suits a wide range of applications
  • Flowing arch design prevents media buildup and reduces turbulence and vibration
  • 250 psig / 17 bar pressure rating ensures longer service life and consolidates inventory
  • Liner extends to outer diameter of flange to prevent chemical attack on expansion joint flanges
  • Mechanically bonded liner resists delamination
  • Available with GYLON® 3545 gasket face for raised face flange connections.  A gasket is not required on full face flange. FEP is compressible to achieve seal.
  • Size:
    • Min. Inner Diameter: 3 in / 75 mm
    • Max. Inner Diameter: 20 in / 500 mm  
  • Temperature:
    • Max temperature rating +300ºF, based on body and cover materials.
      To determine, find the minimum temperature based on materials selected.

      Body Material  |  Max. Temp.

      • Nylon Tire Cord (Standard): +250°F (+120°C)
      • Kevlar Tire Cord: +300°F (+120°C)

      Liner and/or Cover Material  |  Max. Temp.

      • Natural Rubber: +180°F (+80°C)
      • CSM: +250°F (+120°C)
      • Neoprene/FDA Neoprene: +250°F (+120°C)
      • Nitrile/FDA Nitrile: +250°F (+120°C)
      • EPDM/FDA EPDM: +300°F (+150°C)
      • Chlorobutyl (Standard): +300°F (+150°C)
      • HNBR (Hydrogenated Nitrile): +300°F (+150°C)
      • FKM (Fluoroelastomer): +400°F (+205°C)

      Note: Not all materials are available in all configurations. Contact Garlock to inquire.  

  • Pressure and Vacuum Rating:
    EJ306 Table
    Note: Pressure and vacuum ratings at neutral FF dimension. Extended face to face dimensions result in reduced pressure and vacuum ratings for GUARDIAN® Style 306 EZ-FLO® expansion joints.

Standard Design

  • Tube – Seamless FEP lining extends to the outer edge of the flange; completely fused to the expansion joint body- Incorporates a flowing arch design to resist product build-up.  A gasket is not required on full face flange. FEP is compressible to achieve seal.
  • Body – Impregnated nylon tire cord fabric cross-wrapped in bias-ply construction
  • Cover – Homogeneous layer of chlorobutyl elastomer extends to the outside edge of the flange- Coated with a weather-resistant protectant

Optional Configurations

  • Non-standard face-to-face dimensions (pressure / vacuum ratings may be affected)
  • Non-standard drill patterns- Blind flanges (no drilling) 
  • Lightweight designs available for low pressure and non-metallic pipe applications
  • Available with GYLON® 3545 gasket face for raised face flange connections
Garlock Expansion Joint GUARDIAN® 306 EZ-FLO®

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