Kingflex
Direct from our state-of-the-art factory. Engineered with certified materials, optimized K-value profiles, and low moisture absorption rates.
Advanced closed-cell structure NBR/PVC elastomeric tube for HVAC air ducting and water piping insulation.
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Optimized for cryogenic pipelines. Resists extreme cold without cracking, preserving low K-values.
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Premium heat preservation panels for mechanical systems, commercial complexes, and plants.
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Open-cell structure engineered specifically for premium acoustic absorption and noise reduction.
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High flexibility tubing with superior moisture resistance and easy slip-on field installation.
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Systemic multi-layer insulation setup providing consistent thermal barrier for sub-zero operations.
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Flexible acoustic lining designed for equipment casings, generator rooms, and vehicle cabins.
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Specialized elastomeric formula for ultra-low temperature cryogenic logistics and industrial lines.
RFQ SupportIn thermal engineering, the K-Value (also represented as thermal conductivity λ or k) is the definitive measure of a material's capacity to conduct heat. Specifically, it represents the amount of heat energy (measured in Watts) that passes through a one-meter thickness of a material per square meter of surface area, for every one Kelvin (or degree Celsius) of temperature difference across the material. Its unit is expressed as W/(m·K).
For insulation materials, the lower the K-Value, the more effective the insulation. In global procurement, specifying the precise K-value under varying mean temperatures is critical. For instance, elastomeric rubber foam exhibits a K-value of approximately 0.032 to 0.035 W/(m·K) at 0°C. Even small fractional changes in this value can translate into thousands of dollars in energy losses over a commercial HVAC or refrigeration pipeline's operational lifecycle.
Q = -k · A · (ΔT / d)
Where Q is heat flow rate, k is the K-value, A is surface area, ΔT is temperature difference, and d is material thickness.
How international buyers, engineers, and EPC contractors source K-value optimized solutions to align with modern energy regulations.
Global carbon taxes and net-zero build mandates require certified green-building materials. Developers calculate thermal performance index metrics before selecting structural insulation pipelines to meet ASHRAE 90.1 standards.
The global expansion of Liquefied Natural Gas (LNG) infrastructure and liquid hydrogen transport drives heavy demand for low-temperature elastomeric foam materials that resist structural crystallization down to -200°C.
Sourcing departments mandate strict third-party verifications. Products must align with ASTM standards, BS 476 flame ratings, and REACH regulations to enter European, American, and Middle Eastern construction sectors.
Engineered for stability, chemical resistance, and long-term thermal conservation.
| Material Category | Thickness Scope | Density Profile | Operational Temp. Range | K-Value Performance (Typical) | Flame Retardancy Standard |
|---|---|---|---|---|---|
| NBR / PVC Rubber Foam Roll | 6mm to 50mm | 40 - 55 kg/m³ | -40℃ to 105℃ | ≤ 0.034 W/(m·K) at 0℃ | Class 0 / Class 1 (BS 476) |
| Black Rubber Foam Pipe | 9mm to 40mm (ID: 6-114mm) | 40 - 55 kg/m³ | -40℃ to 105℃ | ≤ 0.034 W/(m·K) at 0℃ | UL94 V-0 & V-1 Certified |
| Cryogenic Rubber Foam System | Custom Layered (20mm+) | 50 - 65 kg/m³ | -200℃ to 125℃ | ≤ 0.028 W/(m·K) at -150℃ | ASTM E84 Compliant |
| Rock Wool board | 25mm to 100mm | 60 - 150 kg/m³ | Up to 650℃ | ≤ 0.040 W/(m·K) at 70℃ | Non-combustible Class A1 |
Our flagship sheet rolls feature a closed-cell rate above 98%, offering stable thermal insulation, high vapor resistance, and a flexible installation profile for walls, large ducts, and equipment casings.
Specifically manufactured via seamless extrusion for process pipe systems. Significantly minimizes risks of piping sweat, surface condensation, and cold energy loss in mechanical plant facilities.
Designed with specialized cellular density to break soundwaves down within mechanical plant rooms, hotels, commercial facilities, and complex HVAC duct lines.
Kingflex Insulation Co., Ltd. is a premium manufacturing and trading combo for high-end thermal insulation products. Formed under the umbrella of Jinwei Group, which has a legacy dating back to 1979, we represent the first major manufacturer of thermal insulation materials north of the Yangtze River.
Our production facilities are situated in Dacheng, China—the recognized capital of green-building materials. Currently, Kingflex runs 5 large automatic assembly lines, generating an annual production capacity of over 600,000 cubic meters. This immense production footprint has earned us official designations as a trusted supplier from the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Our competitive advantage lies in our technical R&D structure. Our team features 8 professional research engineers, 6 international sales consultants, and over 230 trained production personnel. This pool of talent ensures that every production batch complies with our K-value stability parameters before shipping overseas.
Helping core industries achieve energy savings, anti-condensation security, and noise-damping controls.
At Kingflex, we believe in technical reliability. Our in-house labs test each batch for cell uniformity, moisture absorption coefficient, elastic recovery, and thermal conductivity. Our research department collaborates with raw material suppliers to refine chemical formulas for better NBR/PVC matrix performance.
How we plan to stay ahead of global standards through material science innovations.
Optimizing micro-cell structure to reduce K-value from 0.034 to 0.031 W/(m·K) under standard conditions without increasing density.
Substituting traditional chemical polymer structures with eco-friendly alternatives to improve environmental ratings and decrease carbon footprint.
Integrating tracking codes on production rolls to allow buyers to access batch testing details, K-value reports, and certificates instantly.
To provide reliable service to our clients, Kingflex offers real-time order tracking and engineering consultations. We assist from the design phase to installation guidance to ensure insulation performance stays aligned with project requirements.
Proof of communication and transaction transparency with our global buyers.
Our materials have been specified and integrated into industrial projects across the globe.
Find technical answers on K-value performance, material selection, and procurement standards.
Elastomeric rubber foam insulation is mainly used for HVAC ducts, air conditioning pipes, building thermal insulation, industrial pipeline cold insulation, and sound insulation. Its closed-cell structures prevent temperature transfer and moisture infiltration, making it ideal for systems prone to condensation.
Yes, Kingflex rubber foam insulation is fire retardant. It meets safety standards for building and industrial projects, including BS 476 Class 0 and Class 1, and UL94 V-0 flame ratings. It self-extinguishes upon contact with fire, preventing the spread of flames.
Rubber foam is flexible, closed-cell, and moisture-proof, which is ideal for HVAC systems, cryogenic pipelines, and building cold-preservation. Rock wool is high-temperature resistant and fireproof, making it suitable for industrial high-temperature steam lines and dry structural fireproofing.
Yes, we support OEM/ODM services. We can customize density, wall thickness, inside diameters, and laminated finishes (such as aluminum foil or self-adhesive backings) to match specific HVAC design profiles and project requirements.
Our products have passed international certifications including BS 476, CE, REACH, ROHS, UL94, and ASTM. This guarantees compliance with quality and safety regulations across international markets.
Yes, Kingflex ensures traceability. Each production batch is cataloged with material mix records, automated lines configurations, density checks, and K-value test results to maintain reliable quality control.
We can manufacture thickness profiles from 6mm to 50mm for our sheet rolls, allowing for layered applications for deep cryogenic and heavy industrial specifications.
When properly installed and maintained under standard operating conditions (-40℃ to 105℃), the average service life of our rubber foam pipes and boards is 10 to 15 years.
Complete set of insulation systems designed for refrigeration systems, cold logistics, and hot steam pipelines.
Equipped with high-performance adhesive backing to save installation time on flat air ducts.
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Foil-faced structure provides UV protection and mechanical damage resistance for outdoor setups.
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Industrial-grade sheets designed for heavy machinery casings and plumbing layouts.
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Designed for ultra-low temperature environments to prevent thermal stress fractures.
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High density profile designed for sound absorption and insulation in commercial systems.
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Insulation pipes with custom diameters to fit standard copper, iron, and plastic pipe designs.
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Easy-to-wrap flexible black tubing designed for tight configurations and residential HVAC systems.
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Standard closed-cell tubes with high resistance to water vapor and stable K-values.
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