GUARDIAN® 200

Chemically-Resistant FEP Expansion Joint

Garlock® GUARDIAN® 200 expansion joints consist of a chemically-resistant Fluorinated Ethylene Propylene (FEP) liner mechanically bonded to an abrupt arch. A chlorobutyl cover and blue protectant coating add resistance to environmental effects. Alternate cover materials are available.

Regional Availability Restrictions: Not available in Europe

  • High-density FEP liner reduces permeation and offers optimal chemical resistance
  • Mechanically bound liner reduces delamination; no glue to be vulnerable to chemical attack
  • High pressure and vacuum resistance ensures suitability for broad range of applications
  • 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: 2 in / 50 mm
    • Max. Inner Diameter: 30 in / 750 mm  
  • Temperature:
    • Max temperature rating is based on body and cover materials.  
      To determine, find the minimum temperature based on materials selected.

      Body Material  |  Max. Temp.

      • Polyester (Standard): +250°F (+120°C)
      • Fibgerglass/Kevlar: +400°F (+250°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:

EJ 200 Table

  • Vacuum Rating (All sizes and pressure classes):
    • Full vacuum / 29.9 in Hg / 750 mm Hg

Standard Design

  • Tube – Seamless FEP lining extends to the outer edge of the flange; completely fused to the joint body. Abrupt arch design used for maximum movement capabilities.  A gasket is not required on full face flange. FEP is compressible to achieve seal.
  • Body – Chlorobutyl/polyester construction with welded, treated metal body rings for dimensional stability
  • Cover – Homogeneous layer of chlorobutyl elastomer is standard. Elastomer extends to the outside diameter of the flange

Optional Configurations

  • Special Designs- Non-standard face-to-face dimensions
  • Non-standard drill patterns- Blind flanges (no drilling) 
  • Available with GYLON® 3545 gasket face for raised face flange connections
Garlock Expansion Joint GUARDIAN® 200

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