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Reducing No Hub Coupling

Introducing Koflex Reducing no hub couplings. These couplings feature a clamp, screws, and shield made entirely of stainless steel for maximum reliability and resistance to corrosion. Four reducing models are available and all come with 2 bands.

-Soft Rubber Gaskets Mold to the Pipes
-Watertight Seal
-Low Expansion and Contraction
-Resistance to Vibrations

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Models

  • Part #

    Description

    Qty/Box

    KF-NHC-R2112

    2″×1-1/2″ Reducing No-Hub Coupling, 2 Bands

    100

    KF-NHC-R3200

    3″×2″ Reducing No-Hub Coupling, 2 Bands

    100

    KF-NHC-R4200

    4″×3″ Reducing No-Hub Coupling, 2 Bands

    64

    KF-NHC-R4300

    4″×3″Reducing No-Hub Coupling, 2 Bands

    64

Technical Data

CERTIFICATIONS, APPROVALS, LISTINGS, & COMPLIANCE

  • UPC
  • CSA
  • Conforms to CISPI 310, ASTM C1277

 

Materials

ClampStainless Steel 301
HousingStainless Steel 301
ScrewStainless Steel 305
ShieldStainless Steel 301
GasketElastomeric compound conforming to ASTM C564

 

Technical Data

Installation Torque60 in/lbs

 

Sleeve Test

TestPhysical Tests – Minimum or Maximum RequirementsASTM
Tensile Strength1500 psi minimumD412
Elongation250 minimumD412
Durometer70 ± 5 @ 76°F ± 5°FD2240
Accelerated Aging15% maximum tensile and 20% maximum elongation deterioration, 10 points maximum increase in hardness, all determinations after oven aging for 96 hours at 158°FD573
Compression Set25% maximum after 22 hours @ 158°FD395
Oil Immersion80% maximum volume change after immersion in IRM 903 for 70 hours @ 212°FD471
Ozone CrackingNo visible cracking @ 2 times magnification of the gasket after 100 hours exposure in 1.5 ppm ozone concentration at 100°F. Testing and inspection to be on gasket which is loop mounted to give approximately 20% elongation of outer surfaceD1149
Tear Resistance150 lbs minimum per inch of thicknessD624
Water Absorption20% maximum by weight after 7 days at 158°FD471

 

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