Kingflex
Explore our elite portfolio of rubber foam sheet rolls, pipeline systems, and custom elastomeric fabrications engineered for global standard performance.
The global construction, industrial HVAC, and petrochemical process industries are experiencing a critical structural shift. Modern building standards, such as LEED v4, BREEAM, and international green mandates, demand architectural systems that minimize thermal bridging, prevent moisture absorption, and significantly mitigate carbon emissions.
Traditional fibrous insulation materials (such as mineral fiber and glass wool) are increasingly being complemented or replaced in specific applications by closed-cell elastomeric rubber foams (NBR/PVC base). Thanks to its micro-cellular structure, modern NBR/PVC elastomeric insulation provides an excellent moisture vapor transmission resistance barrier without the need for additional external jackets. Additionally, its inherent flexibility makes it uniquely suited to complex geometric piping and large flat duct surfaces.
In response to this demand, Chinese manufacturing centers have transitioned from traditional regional supply shops to digitalized, state-of-the-art factories. Advanced continuous vulcanization and uniform chemical foaming lines produce sheets and rolls characterized by high density, stable low thermal conductivity (λ ≤ 0.034 W/(m·K) at 0°C), and exceptional flame-retardant performance under international test methods.
Sustains an exceptionally low lambda coefficient (λ), reducing heat losses or heat gains in complex HVAC systems and chiller piping.
The closed-cell configuration maintains a resistance factor (μ ≥ 10,000) that prevents condensation-induced pipe corrosion (CUI) and mold growth.
Formulated to comply with major worldwide flame spread and smoke optical density standards, such as BS 476 Part 7 Class 1 and UL94 V-0.
Kingflex Insulation Co., Ltd. represents a professional manufacturing and trading combo specializing in thermal and cold-retarding insulation products. Strategically headquartered in Dacheng, China—the capital of green-building materials—we operate as an energy-saving, environmentally conscious enterprise that seamlessly integrates R&D, manufacturing, and distribution.
Founded by the Jinwei Group, which boasts a history of over 40 years dating back to 1979, Kingway/Jinwei was the pioneer manufacturer of thermal insulation materials north of the Yangtze River. Today, Kingflex carries forward this legacy, providing consultation, customized R&D, precision manufacturing, and installation guidance globally.
We employ 8 professional engineers in our R&D department and operate high-standard laboratories to guarantee performance consistency across extreme applications.
To support major commercial projects in regions like North America, the EU, and Southeast Asia, our elastomeric materials undergo rigorous third-party certifications. Kingflex products are certified under BS 476, CE, REACH, ROHS, UL94, and ASTM. This ensures traceabilty, compliance with strict volatile organic compound (VOC) emissions codes, and safety inside public structures.
Procurement directors and HVAC mechanical engineers require solutions that balance capital expenditure (CapEx) against long-term operational efficiency (OpEx). We address these challenges through targeted, project-specific support.
For systems operating as low as -200°C, regular insulation materials can suffer from thermal cracking. Kingflex offers specialized cryogenic-grade NBR rubber foams that retain high elasticity, preventing stress-cracking and ambient moisture entry.
Condensation on chilled water supply lines can lead to ceiling water damage and mold growth. Our elastomeric sheet and roll materials provide continuous coverage for rectangular air ducts and piping manifolds, ensuring thermal integrity.
Our dual-density NBR/PVC panels feature semi-closed cell configurations that absorb sound energy. This configuration reduces structure-borne and airborne noises from fans, mechanical compressors, and drainage conduits.
From modern transportation hubs to hospital systems, Kingflex elastomeric solutions have been specified on demanding infrastructure projects worldwide. Below are visual testimonies of our materials installed on HVAC air-duct networks and massive chilled-water loops.
Understanding material science is critical when specifying thermal insulation. The structural performance of Kingflex NBR/PVC elastomeric rubber foam sheets, rolls, and tubes is outlined in the data below.
Designed for flat and curved layouts, including large-diameter vessels and rectangular HVAC systems.
Extruded hollow profiles designed for slip-on application on copper and steel pipes.
Under the quality policies of the Ministry of Energy, Ministry of Electric Power, and Ministry of Chemical Industry, our products are tracked from raw material inspection to dispatch.
Each production run undergoes structural density mapping and thermal-conductivity verification. Our automated assembly lines ensure consistent sheet density across production batches, helping to avoid thin points that can lead to local cold bridging and condensation.
We work to maintain high standards of reliability with our worldwide distributors and buyers. Our commercial team provides active updates and support to clients globally, as shown in these communication transcripts.
As international construction codes tighten limits on global warming potential (GWP) and ozone depletion potential (ODP), the insulation industry is changing. Kingflex remains committed to sustainable manufacturing through ongoing technology upgrades:
Replacing traditional chemical blowing agents with nitrogen and CO²-based mechanical expansion systems. This technology yields zero ODP and low GWP values for our entire elastomer line.
Working to minimize outgassing compounds, ensuring our sheet and roll insulation meets Indoor Air Quality (IAQ) and cleanroom standards (ISO 14644-1).
Developing NBR/PVC and EPDM alloys that integrate aerogel technologies to achieve lower thermal conductivity at reduced thicknesses.
Technical and commercial answers for engineers, architects, and purchasing managers.
They are primarily used to insulate large-diameter HVAC air distribution ducts, industrial plumbing pipes, chilled water systems, condensation control pipelines, and heavy storage vessels. Their flexibility and closed-cell design make them ideal for systems operating in humid environments or requiring cold containment.
The material features a closed-cell structural configuration (≥ 98% closed cells) with a high water vapor diffusion resistance factor (μ ≥ 10,000). This prevents ambient moisture from penetrating the insulation and reaching the cold pipe surface, eliminating the risk of condensation-induced corrosion (CUI).
Our formulations are engineered to meet major global fire safety requirements, including BS 476 Part 7 Class 1, UL94 V-0 flame-retardant classification, and CE, REACH, ROHS, and ASTM testing parameters. This ensures compliance with structural codes for commercial and public buildings.
Elastomeric rubber foam is flexible, closed-cell, and moisture-proof, making it suitable for cold containment, plumbing, and HVAC systems. Rock wool is a fibrous material with high temperature resistance, making it suitable for high-heat pipelines and structural firewalls, though it typically requires an external moisture barrier.
Yes. We offer OEM customization, including custom thicknesses from 6mm to 50mm, aluminum foil facings, and pressure-sensitive self-adhesive backings to meet specific project guidelines.
When installed correctly in indoor applications and protected from heavy UV exposure, the material typically has an operational service life of 10 to 15 years, during which it maintains its structural density and low thermal conductivity.
Every step of the process is tracked. We verify raw materials, control processing parameters on our continuous vulcanization lines, and test each batch's density and thermal conductivity before shipping.
Yes. Our formulations comply with RoHS and REACH standards. They are free from CFCs, HFCs, and formaldehyde, helping projects earn points under green building standards like LEED.
We pack our rolls and pipes in heavy-duty polyethylene bags or reinforced carton boxes. This ensures they arrive in good condition, preventing physical compression that can affect thermal performance.
We operate 5 automated continuous vulcanization assembly lines with an annual manufacturing capacity of over 600,000 cubic meters, allowing us to support large-scale industrial and commercial orders.
Click on the links below to view technical datasheets, dimensional tolerances, and pricing information for our sheet and tube products.
