Nomaco Kflex
Nomaco Kflex 801-LRE-100158 1-5/8" x 43/64" Elastomeric Elbow Pipe Fitting
Closed-cell elastomeric elbow insulation for 1-5/8" tube OD, rated to 220 °F with R-7.1 and plenum-rated fire performance
- TypeTarps
- Elastomeric insulation rated for -297 °F to 220 °F service
- Closed-cell Buna-N/PVC foam resists moisture and microbial growth
- R-value 7.1 delivers high thermal efficiency in tight spaces
- 90-degree pre-formed elbow fits 1-5/8 in tube OD directly
- Plenum-rated with flame spread index 25 for code-compliant installs
90 Degree Elbow Fitting for 1 1/4 Inch Pipe
This elastomeric pipe fitting insulation is made from Buna-N rubber and PVC for 1 1/4 inch pipe with a 1 5/8 inch outside diameter. The 90 degree elbow form arrives unslit so installers can cut it precisely on site. It carries a plenum rating and meets a flame spread index of 25 for commercial mechanical systems.
Thermal Range and Fire Performance
The closed cell foam operates continuously from minus 297 degrees F up to 220 degrees F while maintaining an R value of 7.1. Antimicrobial additives resist mould growth inside the insulation and the material is flame and fire retardant by design. Flexible construction allows the elbow to absorb vibration without cracking.
Antimicrobial Protection and Plenum Compliance
Built in antimicrobial resistance reduces the risk of biological contamination in air handling plenums. The plenum rating confirms the fitting meets code requirements for exposed installations in return air spaces. Flame spread index of 25 supports compliance with building fire safety standards.
Highlights
- Elastomeric insulation rated for -297 °F to 220 °F service
- Closed-cell Buna-N/PVC foam resists moisture and microbial growth
- R-value 7.1 delivers high thermal efficiency in tight spaces
- 90-degree pre-formed elbow fits 1-5/8 in tube OD directly
- Plenum-rated with flame spread index 25 for code-compliant installs
Specifications
| Brand | K-FLEX USA |
|---|---|
| Type | Tarps |
Questions about this item
How do I install the unslit 90-degree elbow on a 1-5/8" tube without slitting it?
Slide the unslit elbow over the tube end before joining the pipe, then seal the butt joints with compatible adhesive tape to maintain the vapour barrier.
Will the Buna-N/PVC insulation need replacement due to UV or moisture exposure?
The closed-cell foam resists moisture and includes antimicrobial protection, but it is not UV-rated; shield it from direct sunlight to avoid premature degradation.
At what temperature does the R-value of 7.1 start to drop under continuous heat?
The material is rated up to 220 °F; sustained operation near that limit will gradually reduce the effective R-value below 7.1.
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