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Black curved elastomeric pipe elbow insulation fitting

Nomaco Kflex

Nomaco Kflex 801-LRE-048418 elastomeric elbow pipe fitting

SKU CH-BHNF-2HEJ5

Elastomeric elbow insulation for 4-1/8" tube, 90° bend, NBR/PVC material rated -297°F to 220°F with R-value 4.6

  • TypeTarps
  • Fits 4-1/8 in tube for secure pipe insulation
  • 90 degree elbow simplifies duct and tank routing
  • NBR/PVC elastomer withstands -297 to 220 °F
  • R-value 4.6 reduces thermal loss on piping
  • Black finish resists UV and environmental wear

Nomaco Kflex 801-LRE-048418 elastomeric elbow

This Nomaco Kflex 801-LRE-048418 fitting is a black NBR/PVC based elastomeric elbow designed for pipe insulation. It suits mechanical contractors and maintenance teams insulating 90-degree bends on ducts, tanks and piping systems. The material covers a service range from -297 to 220 degrees Fahrenheit with an approximate R-value of 4.6.

Temperature range and material constraints

The NBR/PVC elastomer remains flexible across the stated -297 to 220 degrees Fahrenheit span, but it is not rated for continuous exposure beyond 220 degrees. The nominal 1/2-inch wall delivers the published R-value of 4.6; thicker insulation would be needed for higher thermal resistance. The fitting is sold without adhesive or vapor-barrier jacketing.

Installation notes and common issues

The elbow slips over 4-1/8-inch tube or 3-1/2-inch pipe sizes and is secured with compatible contact adhesive and tape. Gaps at the seam reduce thermal performance and can allow condensation. Cutting the elastomer with a sharp knife prevents tearing; stretching the material thin over the bend lowers the effective R-value.

Highlights

  • Fits 4-1/8 in tube for secure pipe insulation
  • 90 degree elbow simplifies duct and tank routing
  • NBR/PVC elastomer withstands -297 to 220 °F
  • R-value 4.6 reduces thermal loss on piping
  • Black finish resists UV and environmental wear

Specifications

BrandK-FLEX USA
TypeTarps

Questions about this item

Which elbow fitting matches a 4-1/8" tube and 1-1/4" length?

This model fits a 4-1/8" tube I.D. and has a 1-1/4" length, so it matches that exact combination.

What does the R-value 4.6 mean once installed?

R-value 4.6 indicates the thermal resistance of the 1/2" NBR/PVC wall, reducing heat flow through the elbow at operating temperatures.

What temperature range does the NBR/PVC elastomer handle in practice?

The material is rated from -297°F to 220°F, so it remains flexible and insulating across that full span.

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