Nomaco Kflex
Nomaco Kflex 801-LRE-100138 1-3/8" x 43/64" Elastomeric Elbow Pipe Fitting
Elastomeric 90-degree elbow fitting insulates 1-3/8 inch tube at -297 to 220 °F with R-7.2 rating
- TypeTarps
- Fits 1-3/8" tube with 90° elbow design
- NBR/PVC elastomeric material handles -297°F to 220°F
- R-value 7.2 reduces thermal loss on piping
- Black finish suits ducts, tanks and pipe runs
- Pre-formed 43/64" length speeds installation on 1" pipe
Purpose-built elbow insulation
The Nomaco Kflex 801-LRE-100138 is a 90-degree elastomeric elbow fitting designed for pipe and duct insulation. It fits tube sizes of 1-3/8 inches and pipe sizes of 1 inch. The NBR/PVC based material provides thermal protection across a temperature range of -297 to 220 degrees Fahrenheit. This component suits HVAC, refrigeration, and industrial piping installations requiring a precise elbow profile.
Build integration and clearance
The fitting installs directly over existing 90-degree pipe elbows with a nominal inside diameter of 1-3/8 inches. Its 43/64-inch length and 3-3/8-inch width allow it to seat within standard insulation cavities without additional framing. The black elastomeric body remains flexible during installation, conforming to the joint while maintaining continuous vapour barrier integrity. It frees installers from cutting and mitring straight sections for curved runs.
Upgrade context and fit limits
This elbow replaces field-fabricated insulation wraps or taped seams on 1-inch pipe elbows where consistent R-value 7.2 performance is specified. The jump is worth it when codes require factory-moulded fittings for condensation control on below-ambient lines. It does not suit larger diameter tubing, flat ductwork, or applications exceeding the stated temperature ceiling. Builders needing straight-run insulation or tee fittings must source separate components.
Highlights
- Fits 1-3/8" tube with 90° elbow design
- NBR/PVC elastomeric material handles -297°F to 220°F
- R-value 7.2 reduces thermal loss on piping
- Black finish suits ducts, tanks and pipe runs
- Pre-formed 43/64" length speeds installation on 1" pipe
Specifications
| Brand | K-FLEX USA |
|---|---|
| Type | Tarps |
Questions about this item
What temperature range does the NBR/PVC elastomeric material handle during continuous operation?
The insulation is rated from -297 °F up to 220 °F, so it remains stable across that entire span during sustained use.
How much heat does the fitting itself add to the system when installed on hot piping?
The elastomeric body acts as insulation rather than a heat source; with an approximate R-value of 7.2 it resists heat flow instead of generating additional warmth.
Which pipe or tube size must already be in place for this 90-degree elbow to fit?
It is made for 1 3/8-inch nominal ID tubing, which corresponds to 1-inch pipe size and 1 1/4-inch tube ID.
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