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Black flexible tee-shaped pipe insulation with closed-cell foam finish

Nomaco Kflex

Nomaco Kflex 1/2" NBR/PVC Tee Pipe Insulation 3.1 R-Value Black

SKU CH-APBN-ABFJB

Insulates ¾-inch pipe tees with ½-inch thick closed-cell NBR/PVC foam rated R-3.1, plenum-rated and antimicrobial from -297 °F to 220 °F

  • TypeTarps
  • 1 R-value reduces heat loss on ¾ in pipe fittings
  • Closed-cell NBR/PVC foam resists moisture and mould growth
  • Plenum-rated with flame spread index 25 per UL 94
  • Operates from −297 °F to 220 °F without degradation
  • Antimicrobial, fire-retardant formulation protects indoor air quality

Pipe Fitting Insulation

This tee-shaped insulation fits a 3/4 in pipe with a 1 1/8 in outside diameter. The unslit design requires sliding over the fitting before final connection. It suits HVAC and plumbing installers who need flexible closed-cell coverage for copper or steel tees. The black NBR/PVC blend resists microbial growth and meets plenum fire-safety requirements.

Thermal Rating R-Value 3.1

The approximate R-value of 3.10 is the single figure that determines whether this thickness meets your heat-loss budget. At 1/2 in wall thickness it delivers that resistance for the specified pipe size. If your calculation calls for a higher R-value you will need a thicker wall or an additional insulation layer.

Temperature Range -297 to 220 Degrees F

The foam remains flexible from -297 Degrees F up to 220 Degrees F, so it handles sustained cryogenic and high-temperature service without cracking or softening. Closed-cell structure and a flame spread index of 25 with UL 94 rating keep performance stable through continuous thermal cycling. Antimicrobial additive prevents degradation during long-term exposure to moisture.

Highlights

  • 1 R-value reduces heat loss on ¾ in pipe fittings
  • Closed-cell NBR/PVC foam resists moisture and mould growth
  • Plenum-rated with flame spread index 25 per UL 94
  • Operates from −297 °F to 220 °F without degradation
  • Antimicrobial, fire-retardant formulation protects indoor air quality

Specifications

BrandK-FLEX USA
TypeTarps

Questions about this item

What does the 3.1 R-value mean once this tee insulation is installed on a 3/4 inch pipe?

The 3.1 R-value indicates the thermal resistance of the 1/2 inch thick NBR/PVC foam when fitted on a pipe with a 1 1/8 inch outside diameter, reducing heat loss or gain across the operating range.

How does the UL 94 standard and 25 flame spread index cap the use of this insulation in a plenum space?

The product carries a plenum rating and meets UL 94 with a flame spread index of 25, allowing installation in air-handling spaces where building codes require low flame spread and smoke development.

What physical dimensions must the pipe and fitting match for this unslit tee to fit correctly?

The tee is made for a 3/4 inch pipe size with a 1 1/8 inch outside diameter and requires a 1/2 inch wall thickness to seat properly over the fitting.

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