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DURA-PERM TEFLON LINED SPOOL TYPE EXPANSION JOINTS

UNAFLEX "DURA-PERM" Expansion Joints combined the best features of Teflon with the best features of elastomeritc expansion joints.  Joints are available in 1" to 96" I.D. in standard face-to-face dimensions, or special lengths.  Also available in multiple arch configurations, or as straight pipe.  NOTE:  1/2" to 1-1/2" sizes are flared to raised face dimension only.
They are recommended for use in the chemical and pulp paper industries because of their capabilities to resist corrosive attack and high temperatures and pressures. DURA-PERM SPECIFICATIONS (CLICK PICTURE TO VIEW).
  • Chemical Resistance / Anti-Stick properties
  • Thermal Stability / Resistance to age cracking
  • Noise and Vibration dampening / High Flexibility
  • High pressure rating / Temperature rating to 400F.

NOTE:  Standard drilling:  ANSI B16.1 - 1975,  ANSI. B16.24 - 1971 Class 150#

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SUGGESTIONS FOR INSTALLATION AND MAINTENANCE

  1. Clean all foreign matter and remove burns or sharp edges from flanges.
  2. All pipe lines should be properly supported, so that the expansion joints do not carry the pipe load.
  3. Remove burrs or sharp edges from flanges.
  4. Do not install joints on raised face flanges of more than 1/16"
  5. All pipes are to be lined up accurately before installing expansion joints.  Offset joints should be installed where misalignment is greater than the lateral movement allowed by joint construction.
  6. Bolts should be on the inside of the joint flange.  Metal washer must be placed at the facing of the split retaining rings.
  7. Bolts should be tightened by alternating around the flange and all tightened equally.
  8. Slight gouges or abraded areas caused by tools or bolts during installation should be sealed with rubber cement and painted to prevent deterioration of the carcass.
  9. Bolt tightness should be checked one week after going on stream and periodically thereafter.
  10. If system is not anchored to insure against movement beyond maximum stated limits, a control unit must be used.
Control Units - Excess elongation, caused by shifting of pipe lines may seriously damage rubber expansion joints.  This damage can occur when:  necessary support is not provided for the weight of the pipe line; low temperatures in the lines are encountered;  the lines on the pressure side of the air compressors are not anchored properly.  Such destructive elongation can be controlled with UNAFLEX control units.  In general, control units are always recommended as an additional safety factor, preventing damage to the connector and associated equipment.  Our experts will recommend the units appropriate for your installation.

Options:  Flow Liners available in Teflon, Metallic or Elastomeric type.

Construction Details  (Styles 150, 200 and 200XL)

  1. Tube:  The tube is a single molded Teflon (TFE, FEP or PFA) leak proof lining extending flange to flange.  The outside of the Teflon tube is etched to adhere to the elastomeric overlay.
  2. Carcass:  This is a high strength woven polyester or Kevlar reinforcing fabric between the Teflon tube and the cover.
  3. Steel Reinforcement:  These are the chemically treated solid round endless rings or high tensile strength helical wire embedded in the carcass.  The steel reinforcement provides additional strength for pressure and vacuum service.
  4. Cover:  This is the exterior elastomeric overlay designed to protect the carcass from external elements.
Special Constructions:  Hinged, Gimbal, Dual, pressure balanced.  (Consult Hosexpress).

 

If you have any questions about the suitability of a hose for a particular service, contact Hosexpress, (Toll Free 866.397.4673), for a recommendation.

 

TOLL FREE: 866.397.4673

Fax: (409) 886-5829

Terms and Conditions of Sale

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