High-performance elastomeric and soundproof systems designed for global compliance and extreme climate demands.
As the United Kingdom accelerates its pathway to net-zero carbon emissions by 2050, building systems and industrial processing facilities are subjected to unprecedented regulatory oversight. Meeting these standards requires more than basic thermal barriers; it demands high-performance, precision-engineered insulation systems. The energy performance of heating, ventilation, air conditioning (HVAC), and refrigeration systems directly impacts building operational carbon emissions.
Historically, thermal performance calculations relied on simple approximations. Today, modern building envelopes and complex building services engineering require precise structural thermal values, known in the UK and European markets as the R-Value (Thermal Resistance) and U-Value (Thermal Transmittance). Selecting the correct insulation configuration prevents heat gain or loss, controls surface condensation, and guarantees long-term energy efficiency.
The mathematical and physics-based approach to assessing thermal insulation performance in standard HVAC and building envelope configurations.
In thermal physics, the R-value measures a material's resistance to heat flow. The higher the R-value, the greater the insulating effectiveness. Mathematically, it is defined as:
Kingflex
R = d / λ
Where d represents the thickness of the insulation material in meters (m), and λ (lambda) is the thermal conductivity of the material measured in Watts per meter-Kelvin (W/mK). Unlike the US market, which uses imperial units (hr·ft²·°F/Btu), the UK and EU markets use metric units (m²·K/W).
To support mechanical engineers, architectural designers, and procurement managers in calculating appropriate specifications, Kingflex provides the following indicative reference values for closed-cell elastomeric foam and rock wool systems under standard ambient operating conditions (20°C):
To convert metric R-values (m²·K/W) to imperial R-values (ft²·°F·hr/Btu), multiply the metric value by 5.67826. Ensuring this distinction prevents layout and calculation errors when specifying HVAC products across international boundaries.
| Material Type | Nominal Thickness (mm) | Thermal Conductivity λ (W/mK) | Metric R-Value (m²·K/W) | Imperial R-Value Equivalent | Primary UK Application Focus |
|---|---|---|---|---|---|
| NBR/PVC Elastomeric Foam | 9 mm | 0.034 | 0.265 | R-1.50 | Chilled Water Pipe Condensation Control |
| NBR/PVC Elastomeric Foam | 13 mm | 0.034 | 0.382 | R-2.17 | HVAC Ductwork & Air Conditioning Lines |
| NBR/PVC Elastomeric Foam | 19 mm | 0.034 | 0.559 | R-3.17 | VRF systems, High Relative Humidity Environments |
| NBR/PVC Elastomeric Foam | 25 mm | 0.035 | 0.714 | R-4.06 | Plant Room Pipes & Acoustic Decoupling |
| NBR/PVC Elastomeric Foam | 32 mm | 0.035 | 0.914 | R-5.19 | Low-temperature Refrigeration Systems |
| NBR/PVC Elastomeric Foam | 50 mm | 0.036 | 1.389 | R-7.89 | Industrial Chilled Process Pipework |
| Rock Wool Insulation | 50 mm | 0.038 | 1.316 | R-7.47 | High Temperature Heat Pipes & Fire Protection |
| Rock Wool Insulation | 100 mm | 0.038 | 2.632 | R-14.95 | Structural Cavity Walls & Plant Enclosures |
Established in 1979 under the Jinwei Group, Kingflex holds a 40-year legacy of manufacturing high-performance thermal insulation systems. Based in Dacheng, China—a hub for green building technology—our facility operates five advanced automatic assembly lines. With an annual production capacity exceeding 600,000 cubic meters, Kingflex is a designated manufacturer for major environmental and industrial infrastructure projects.
Our business model integrates R&D, manufacturing, custom fabrication, and direct technical support. We serve projects in over 66 countries, offering system solutions that meet strict building compliance rules in the UK, Europe, the Middle East, and the Americas.
Ensuring fire resistance, material safety, and environmental protection across UK building and construction sectors.
Kingflex elastomeric foam and rock wool insulation products are designed to meet BS 476 (Parts 6 and 7). They are flame-retardant and self-extinguishing, preventing fire propagation and limiting smoke density in commercial structures.
Our formulas exclude hazardous substances, ensuring compliance with REACH and RoHS regulations. The foam is free from halogens, CFCs, and HCFCs, making it suitable for cleanrooms and hospital HVAC systems.
Products are manufactured under a certified ISO 9001 management system and undergo testing in accordance with ASTM C534 and CE standards. Full batch traceability ensures high consistency and performance.
Designers must select thermal insulation based on the specific requirements of their application. Kingflex manufactures both closed-cell NBR/PVC elastomeric rubber foam and industrial rock wool (mineral wool) to meet different design criteria.
Material: NBR/PVC | Thickness: 6mm–50mm | Density: 40–55 kg/m³ | Temperature Range: -40°C to 105°C
Material: NBR/PVC | Thickness: 9mm–40mm | ID Range: 6mm–114mm | Temperature Range: -40°C to 105°C
Material: High-density mineral fibers | Thickness: 25mm–100mm | Non-combustible Class A1
Our dedicated Research and Development department features eight professional material science engineers. They focus on improving polymer formulations, reducing thermal conductivity, and enhancing fire safety performance.
Every product batch is tested for key mechanical properties, including closed-cell ratio, density, and thermal conductivity across a range of operating temperatures. This verification ensures consistent performance and compliance on site.
Examining active site installations and commercial project completions in global locations.
We maintain full batch traceability for our insulation products. Every production run is documented, tracking raw materials, formulation parameters, curing temperatures, and final product testing results.
To verify the mechanical and thermal performance of our products, we provide full access to third-party laboratory reports. Below, you can find verification from international projects that demonstrates our materials' performance in demanding environments.
In addition, our international project managers work directly with clients to coordinate delivery schedules, resolve site installation issues, and ensure compliance with local building regulations.
Get authoritative answers on thermal performance, fire testing, and code compliance in the UK and European markets.
Extended thermal barrier options including heavy-density rock wool, soundproofing sheets, and flexible pipe tubing.
