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NBR Insulation

AP Armaflex-grade NBR insulation for VRF Y Branch Joints — ASTM E84 25/50 fire-rated, moisture-proof, and precision-cut for a perfect fit.
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"Insulation That Bends to the Joint, Not the Other Way Around"

Rigid insulation has one job and one shape. NBR doesn’t work that way. 227 Enterprise Pvt. Ltd. manufactures premium NBR — nitrile-butadiene rubber — foam insulation for VRF and VRV Y Branch Joints specifically because it flexes around a joint’s geometry instead of forcing the joint to accommodate the insulation. That flexibility doesn’t come at the cost of performance: the closed-cell structure holds heat loss down, resists water-vapor ingress rather than absorbing it, and keeps condensation from forming at the one place on a VRF line — the cold, uneven surface of a branch joint — where it’s hardest to control.
Fire safety is where we don’t compromise on grades. Our AP Armaflex-grade NBR insulation is rated ASTM E84 25/50, the standard flame-spread and smoke-development benchmark specifiers actually check for on commercial and industrial projects, so it isn’t a claim you have to take on faith. Each piece ships precision-cut to match the exact profile of the VRF Y Joint it’s insulating, with an adhesive backing built in, which means less trimming on site, a faster install, and a finish that looks like it was made for the joint — because it was. Add in genuine moisture resistance, a materially quieter line thanks to the foam’s vibration and flow-noise dampening, and a recyclable, long-wearing material underneath it all, and you get insulation built for VRF systems that are expected to run — and run quietly — for years.

Product Features

Product Specification

SPECIFICATION DETAILS
Insulation Material Premium Nitrile Butadiene Rubber (NBR) closed-cell elastomeric foam
Insulation Grade AP Armaflex-Grade NBR
Primary Application Thermal and condensation insulation for VRF/VRV refrigerant piping components
Cell Structure Flexible, closed-cell construction
Fire Performance ASTM E84 25/50 Rated
Flame Spread Index ≤ 25
Smoke Developed Index ≤ 50
Thermal Performance Low thermal conductivity for effective control of unwanted heat transfer
Condensation & Moisture Control High resistance to water-vapor ingress, helping prevent condensation on cold refrigerant joints
Insulation Profile Precision-cut to match complex VRF/VRV Y Branch Joint geometry
Installation Adhesive-backed construction for faster, cleaner and more consistent fitment
Customization Insulation thickness, dimensions and cut profile customizable according to Y Joint and project requirements
System Compatibility VRF / VRV air-conditioning and heat-pump refrigerant piping systems
Typical Applications Y Branch Joints, refrigerant branch piping kits, headers, reducers and associated copper refrigerant fittings
Vibration Dampening Flexible elastomeric structure helps absorb vibration transmitted through refrigerant piping
Acoustic Performance Helps reduce structure-borne piping and refrigerant-flow noise
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SPECIFICATION DETAILS
Insulation Material Premium Nitrile Butadiene Rubber (NBR) closed-cell elastomeric foam
Insulation Grade AP Armaflex-Grade NBR
Primary Application Thermal and condensation insulation for VRF/VRV refrigerant piping components
Cell Structure Flexible, closed-cell construction
Fire Performance ASTM E84 25/50 Rated
Flame Spread Index ≤ 25
Smoke Developed Index ≤ 50
Thermal Performance Low thermal conductivity for effective control of unwanted heat transfer
Condensation & Moisture Control High resistance to water-vapor ingress, helping prevent condensation on cold refrigerant joints
Insulation Profile Precision-cut to match complex VRF/VRV Y Branch Joint geometry
Installation Adhesive-backed construction for faster, cleaner and more consistent fitment
Customization Insulation thickness, dimensions and cut profile customizable according to Y Joint and project requirements
System Compatibility VRF / VRV air-conditioning and heat-pump refrigerant piping systems
Typical Applications Y Branch Joints, refrigerant branch piping kits, headers, reducers and associated copper refrigerant fittings
Vibration Dampening Flexible elastomeric structure helps absorb vibration transmitted through refrigerant piping
Acoustic Performance Helps reduce structure-borne piping and refrigerant-flow noise

Why 227 Enterprise

227 Enterprise Pvt. Ltd. is a trusted manufacturer of custom VRF copper joints and DA Series NBR-insulated Y Joints built for HVAC systems where performance isn’t negotiable. Every piece of insulation is fitted with the same precision as the joint underneath it, which is what gets you the thermal efficiency and the finish quality at the same time, rather than one at the expense of the other. That precision is backed by manufacturing held to a stringent quality standard, fire safety that’s rated rather than assumed, and durability built to outlast a single project cycle — which is exactly why OEMs, HVAC contractors, and demanding commercial projects across Europe and other global markets keep specifying it.

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Product Faqs

What is NBR insulation and how is it advantageous for VRF and VRV HVAC systems?

NBR — nitrile butadiene rubber — is a flexible closed-cell foam that has become a standard choice for HVAC and refrigeration piping — and on VRF/VRV systems in particular, it does so by accomplishing two things well: reducing unwanted heat transfer and preventing condensation on cold refrigerant lines. Not stiff, but flexible, it goes around copper Y joints, reducers, and branch connections, not leaving gaps at every bend, so the insulation stays continuous over the whole piping run instead of breaking anywhere the geometry gets tricky.

Why use NBR insulation for VRF Y Branch Joints and refrigerant piping?

The simplest case is a length of copper tubing straight. A VRF Y branch joint is not. It's curves, several branches and pipe sizes changing just where the insulation has to stay on operating. And that’s where flexible NBR is the big winner. It conforms to the real shape of the joint instead of creating gaps and thermal bridges at each transition. And that’s precisely why we fit it tightly around VRF branch joints. That’s what gives you genuine condensation control, a cleaner install and a seam that blends seamlessly into the insulation on the adjacent pipe, rather than standing out like an obvious patch job.

What is the fire safety standard for 227 Enterprise NBR Insulation?

AP Armaflex-grade NBR insulation with an ASTM E84 rating of 25/50, i.e., a flame-spread index of 25 or less and a smoke-developed index of 50 or less under ASTM E84 testing. And that’s the real standard most HVAC specs call for when surface-burning features are a need, not simply a nice-to-have. That said, fire codes differ by project and by jurisdiction, so it’s worth clarifying the precise requirement and the matching certification before you lock in the selection.

How can NBR insulation reduce condensation and moisture buildup?

The closed-cell structure is the thing that makes this work. It doesn't allow the transmission of water vapor, so damp air never gets to the cold copper surface underneath in the first place. Insulation, however, only works if the details are good: the precise thickness for the application, and every seam, joint and termination properly sealed. Get it right and the outer surface stays above dew point, which is what truly stops condensation, leaking and moisture buildup around VRF joints and pipework, not the material itself.

Why 227 Enterprise as your NBR insulation manufacturer and supplier?

The insulation at 227 Enterprise is designed around the junction and not as a separate site item. Our NBR insulation solutions are engineered to fit accurately around complex VRF/VRV copper joint profiles, providing consistent coverage and reducing the need for excessive cutting and modification during installation. We can provide you with entire insulated copper branch solutions, based on system drawings and project specifications, utilizing AP Armaflex-grade NBR insulation rated ASTM E84 25/50, along with OEM-customized dimensions and insulation configurations.

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