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Nomaco Kflex

Nomaco Kflex 801-LRE-100318 3-1/8" 90° Elastomeric Elbow Pipe Fitting

SKU CH-3TWD-0828X

NBR/PVC elastomeric 90° elbow fitting insulates 3-1/8" pipe from -297°F to 220°F with R-6.2 thermal resistance

  • Product typeTarps
  • NBR/PVC elastomer withstands -297 °F to 220 °F
  • R-value 6.2 cuts thermal loss on 3-1/8" tubes
  • 90° elbow fits 3" I.D. pipe without gaps
  • 1-5/64" wall thickness meets standard insulation specs
  • Black finish resists UV and moisture on ducts and tanks

Elastomeric Elbow for 3-1/8" Tube

This NBR/PVC elastomeric fitting insulates a 90 degree elbow on 3-1/8 inch outer-diameter pipe. The black insulation carries an approximate R value of 6.2 and withstands temperatures from -297 to 220 degrees F. It suits commercial piping, ductwork and tank installations that demand closed-cell thermal protection.

HVAC Installers and Maintenance Teams

Technicians insulating chilled-water, refrigerant or low-pressure steam lines will find the material flexible enough to wrap tight bends without splitting. It is not suited for exposed outdoor runs that require UV-resistant jacketing, nor for systems that operate above 220 degrees F. Buyers needing fire-rated wrap or thicker wall sections should seek alternative products.

R-Value 6.2 and 1-5/64" Wall

The 1-5/64 inch wall delivers R-6.2 performance, controlling condensation and heat gain on 3 inch nominal tube. It handles sub-zero chillers down to -297 degrees F and moderate heating up to 220 degrees F. Beyond that range the elastomer can degrade, and the fixed 90 degree geometry cannot accommodate custom angles or larger diameters.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $12.99
Cheaper than about 65% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameK-FLEX USA
Product typeTarps

Questions about this item

What pipe size must I already have for this 3-1/8 in nominal ID elbow to fit?

It fits a 3 in tube ID and has a 3-1/8 in nominal insulation ID.

Can I join this 90 degree elbow to straight NBR/PVC insulation with the same 1 in wall thickness?

Yes, the 1 in wall thickness matches standard K-FLEX straight lengths for a continuous vapour seal.

How do I confirm the fitting is performing within its -297 to 220 °F range after installation?

Measure the pipe surface temperature under load; it should stay inside the -297 to 220 °F limits.

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