Explore our leading flexible elastomeric foam tubes, sheets, and system components certified for global HVAC and building insulation applications.
Modern ventilation networks require robust thermal and acoustic management to avoid significant energy loss, thermal bridging, and structural degradation caused by condensation. As a premier global provider, our closed-cell NBR/PVC elastomeric insulation systems stand at the forefront of engineering excellence.
We synthesize high-density, uniform closed-cell structures that feature a water vapor diffusion resistance factor (μ) exceeding 10,000. This provides a built-in vapor barrier that prevents moisture infiltration, a key issue that often causes mold growth and reduces efficiency in standard fibrous insulation systems.
Our materials maintain a low and stable thermal conductivity (λ ≤ 0.034 W/(m·K) at 0°C). This ensures long-term operational efficiency for cold air supply lines and mechanical ventilation equipment, making them ideal for high-humidity environments, cleanrooms, and commercial ductwork.
View Technical Specs
Established under the parent umbrella of the Jinwei Group (founded in 1979 as the pioneer manufacturer of thermal insulation materials north of the Yangtze River), Kingflex Insulation Co., Ltd. has evolved into a premier manufacturing and trading powerhouse.
Located in Dacheng, the recognized capital of green building materials in China, Kingflex operates as an energy-saving, environmentally conscious enterprise. We integrate engineering research, automated production, and technical advisory services to support projects globally.
Our competitive advantage lies in our dedicated team: 8 professional R&D engineers focused on material science development, 6 professional international sales specialists offering technical procurement support, and over 230 skilled production technicians maintaining strict quality control across all automated production lines.
By utilizing advanced continuous foaming lines and automated raw material dosing systems, we ensure consistent product quality and reliable supply volumes for major global construction and industrial projects.
Our manufacturing facility operates five continuous automation lines, minimizing manual variance and ensuring dimensional consistency across sheets and tubes.
With high-volume output capacities, we reliably meet large-scale global procurement needs without extending lead times.
Recognized and designated as an authorized manufacturing enterprise by the Ministry of Energy, Ministry of Electric Power, and Ministry of Chemical Industry.
Detailed performance parameters for Kingflex Black Rubber Foam Insulation Sheets, Rolls, and Pipes.
| Property Category | Rubber Foam Sheet Roll Parameters | Rubber Foam Pipe / Tube Parameters |
|---|---|---|
| Base Material Structure | NBR/PVC Elastomeric Closed-Cell Foam (Closed-cell rate >98%) | NBR/PVC Flexible Closed-Cell Matrix (Uniform spray coating) |
| Standard Thickness | 6mm, 9mm, 13mm, 15mm, 19mm, 25mm, 32mm, 40mm, 50mm | 9mm, 13mm, 15mm, 19mm, 22mm, 25mm, 30mm, 35mm, 40mm |
| Inner Diameter (ID) / Width | Standard Width: 1m / 1.2m / 1.5m | 6mm up to 114mm (compatible with global copper & steel pipe sizes) |
| Density Range | 40 - 55 kg/m³ | 40 - 55 kg/m³ |
| Service Temperature Limit | -40℃ to 105℃ (Cryogenic series functional down to -200℃) | -40℃ to 105℃ (Cryogenic series functional down to -200℃) |
| Thermal Conductivity (λ) | ≤ 0.034 W/(m·K) at 0℃ | ≤ 0.035 W/(m·K) at 0℃ |
| Water Vapor Resistance (μ) | ≥ 10,000 (Built-in vapor retarder) | ≥ 7,000 (Prevents pipe condensation) |
| Reaction to Fire | Class 0 / Class 1 (BS 476), Self-extinguishing, UL94 V-0 | BS 476 Part 6 & 7 certified, low optical smoke toxicity |
Our products are engineered to meet the thermal isolation, acoustic dampening, and safety requirements of various industrial and civil sectors.
Ideal for central air conditioning duct systems, supply air grilles, and chilled water circulation loops in hotels, airports, shopping centers, and hospitals. It effectively controls condensation risks while providing acoustic dampening.
Specially formulated low-temperature rubber foam designed for cryogenic pipelines and liquid nitrogen transmission loops down to -200°C. It maintains flexibility and prevents stress cracking under extreme thermal conditions.
Provides thermal barrier protection and corrosion mitigation for chemical storage tanks, high-pressure steam distribution pipes, and processing vessels. Resistant to chemical deterioration and weathering.
Our commitment to quality control is backed by certifications from international testing agencies. Kingflex elastomeric insulation products are regularly audited to maintain compliance with key standards:
This systematic focus on quality control ensures that project managers and MEP contractors receive reliable, code-compliant materials for high-spec engineering designs.
Continuous innovation in material science is central to our R&D efforts. Our technical roadmap focuses on the next generation of insulation systems.
We are currently developing NBR-aerogel composite matrices to reduce thermal conductivity values further, targeting λ ≤ 0.028 W/(m·K) for higher thermal efficiency in thinner profiles.
In response to global sustainability trends, our research includes integrating bio-derived polyols and circular rubber scraps to reduce the carbon footprint of our NBR/PVC foams.
Improving the performance of Kingflex 520 adhesive to achieve higher temperature limits, stronger bonding, and faster cure times for complex pipe configurations.
Proven performance in major commercial infrastructure, petrochemical plants, and cold chain systems.
Review answers to common technical, design, and compliance questions regarding elastomeric closed-cell insulation systems.
A1: It is primarily used for insulating HVAC ducts, central air conditioning piping, industrial pipelines, cold/hot water distribution loops, and sound dampening. Its closed-cell structure makes it suitable for preventing condensation on chilled pipes.
A2: Yes. Kingflex rubber foam is formulated with flame retardants, allowing it to meet BS 476 Class 0 and Class 1, UL94 V-0, and ASTM fire safety standards for mechanical systems.
A3: Rubber foam is highly flexible and features a closed-cell structure that acts as a built-in vapor barrier, making it suitable for cold line condensation control. Rock wool is a fibrous material with high temperature resistance, typically used for high-temperature steam lines or acoustic walls.
A4: Yes. We offer comprehensive OEM/ODM services, including custom tube wall thicknesses, custom inner diameters (ID), self-adhesive backing options, and aluminum foil cladding for outdoor applications.
A5: Kingflex products are certified under BS 476, CE, REACH, RoHS, UL94, and ASTM. This ensures compliance with structural and fire safety codes in diverse regions, including the EU, North America, and the Middle East.
A6: Yes, each batch is assigned a unique tracking number, linking it to the raw material inputs, manufacturing line details, and final test reports for reliable quality verification.
A7: We manufacture insulation sheet rolls in thicknesses ranging from 6mm to 50mm, allowing for tailored thermal protection across various target delta temperatures.
A8: Under standard operational conditions and when installed according to guidelines, our elastomeric rubber foam insulation has a service life of 10 to 15 years.
Explore our specialized range, including soundproofing blankets, cryogenic insulation formulations, and system adhesives.
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