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Heavy Duty No Hub Coupling

Introducing Koflex Heavy Duty no hub couplings. These couplings feature a clamp, screws, and shield made entirely of stainless steel for maximum reliability and resistance to corrosion. Depending on the size, they are available with either 4 or 6 bands, providing a super tight seal. Sizes ranging from 2″ – 15″ are available to satisfy any type of application.

-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-200HD

    2″ Heavy Duty No-Hub Coupling, 4 Bands

    75

    KF-NHC-300HD

    3″ Heavy Duty No-Hub Coupling, 4 Bands

    48

    KF-NHC-400HD

    4″ Heavy Duty No-Hub Coupling, 4 Bands

    48

    KF-NHC-500HD

    5″ Heavy Duty No-Hub Coupling, 6 Bands

    15

    KF-NHC-600HD

    6″ Heavy Duty No-Hub Coupling, 6 Bands

    15

    KF-NHC-800HD

    8″ Heavy Duty No-Hub Coupling, 6 Bands

    15

    KF-NHC-1000HD

    10″ Heavy Duty No-Hub Coupling, 6 Bands

    12

    KF-NHC-1200HD

    12″ Heavy Duty No-Hub Coupling, 6 Bands

    8

    KF-NHC-1500HD

    15″ Heavy Duty No-Hub Coupling, 6 Bands

    4

Technical Data

CERTIFICATIONS, APPROVALS, LISTINGS, & COMPLIANCE

  • UPC
  • 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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