Kingflex
Explore our leading closed-cell synthetic rubber foam solutions configured for low-temperature heat barrier, cryogenic containment, and high-efficiency HVAC operations.
A comprehensive examination of how NBR/PVC closed-cell structures prevent heat transfer and control condensation in heavy industrial and MEP operations.
Flexible Elastomeric Insulation (FEI), predominantly formulated using a combination of Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC), is the leading choice for applications requiring precise thermal control and high moisture resistance. The micro-structural profile of this material contains millions of independent micro-cells. Unlike open-cell fibrous structures (like glass wool or rock wool), these cells are completely sealed, enclosing stagnant air which behaves as an exceptional barrier to conductive heat flow.
By integrating PVC, the polymer matrix gains improved flame resistance, chemical durability, and ultraviolet stability. This formulation is highly resilient against physical compression and recovers over 80% of its thickness upon loading, sustaining its thermal properties over decades of operation.
Automated extrusion line ensuring uniform cellular configuration
Engineered to deliver exceptional thermal resistance. The uniform, micro-cellular structure maintains a stable coefficient of thermal conductivity, reducing heat loss in hot lines and preventing gain in chilled piping.
Specifically modified polymers capable of enduring extreme thermal stresses down to -200°C without fracturing. Perfect for LNG piping, cryo-distillation, and ultra-cold containment storage systems.
Meets rigorous fire safety codes, including BS 476 Part 7 (Class 1) and UL 94. Naturally flame retardant and self-extinguishing to ensure critical containment safety in commercial structures.
Delivering high-efficiency thermal barriers to scale commercial development, heavy refining, and environmental sustainability.
Modern commercial buildings demand continuous temperature control. Kingflex elastomeric systems are widely used in commercial ventilation runs, chiller pipe networks, and plumbing systems. By preventing condensation on cold duct faces, they protect interior building structures from moisture damage and mold cultivation, ensuring indoor air quality (IAQ) remains clean.
Petrochemical plants handle highly volatile, temperature-sensitive chemicals. Closed-cell rubber foam insulation provides a thermal barrier for volatile process pipelines, preventing thermal shocks, managing fluid viscosities, and mitigating Corrosion Under Insulation (CUI) through its non-permeable vapor-tight design.
China is a hub for green building material manufacturing. Within Dacheng, Dacheng County, Hebei Province, Kingflex runs automated assembly systems capable of supplying massive global construction projects. Our logistics pipeline exports to over 66 countries, adapting product specs to match localized certification frameworks such as ASTM C534 (US standard) and EN 14304 (European standard).
A history of industry leadership in high-efficiency green insulation materials, backed by state certifications and continuous engineering research.
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for thermal insulation products. Kingflex research development and production department is located in the well-known capital of green-building materials in Dacheng, China. It is an energy-saving, environmentally friendly enterprise concentrating on research, development, production, and sales. In operation, Kingflex takes energy saving and consumption reduction as its core concept. We provide solutions regarding insulation by means of consultation, research and development, production, installation guidance, and post-sale service to lead the development of the global building materials industry.
Established by the Jinwei Group, which has a history of more than 40 years, Kingflex builds on decades of production experience. Jinwei Group was established in 1979 as the first manufacturer of thermal insulation materials north of the Yangtze River. Today, Kingflex has become a designated production enterprise appointed by the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Quality System
BS 476 Standard
CE Compliance
Technical Verification
Our team is composed of dedicated professionals working towards a shared vision. We employ 8 professional engineers in our R&D Department, 6 professional international sales specialists, and over 230 production workers. This balanced structure allows us to handle high-volume OEM/ODM projects while providing technical sales support and post-sale installation guidance.
A closer look at the physical specifications, material profiles, and dimensions of our core NBR/PVC elastomeric insulation product lines.
Designed for large surface areas such as commercial air ducts, large tanks, and flat industrial surfaces. Our sheet rolls provide clean coverage, preventing thermal bridges and ensuring condensation is controlled.
Perfectly sized for mechanical chilled lines, domestic heating lines, and industrial chemical process pipes, these tubes prevent condensation and pipe freezing risks.
Adapting our manufacturing outputs to meet national building standards and specialized local environments.
Installed directly on HVAC cold-water pipes, condensate pipelines, and air treatment systems. Prevents sweating and heat gain in humid regions, helping to maintain HVAC operating efficiency.
Maintains system performance down to -200°C. Widely used for LNG transport lines, ethylene processes, and medical low-temperature units, where preventing moisture penetration is critical to avoid icing.
Uses specialized open-cell elastomeric configurations to absorb air-borne sound waves. Helps reduce vibration and noise transmission in mechanical rooms, hotels, hospitals, and transit vehicles.
| Global Standard Code | Geographic Area | Material Property Evaluated | Kingflex Verification Status |
|---|---|---|---|
| BS 476 Part 7 / Part 6 | UK & Commonwealth | Surface Flame Spread & Fire Propagation Class 0/1 | Certified & Passed (Class 0 Compliance) |
| ASTM C534 / E84 | North America | Thermal conductivity limits, flame/smoke index (25/50) | Fully Compliant (Smoke density under 50) |
| EN 14304 | European Union | CE compliance testing for thermal insulation products | CE Approved & Documented |
| RoHS / REACH | Global Directive | Exclusion of dangerous substances, halogens, heavy metals | Environmentally Certified (VOC-free compliant) |
Our ongoing R&D efforts focus on eco-friendly chemistries, improved insulation performance, and sustainable manufacturing processes.
Developing elastomeric formulations with zero bromine or chlorine contents. This prevents the release of corrosive gases during fires, meeting strict requirements for passenger ships, trains, and cleanroom applications.
Replacing traditional fossil-derived nitrile polymers with bio-derived alternatives. This helps lower the overall carbon footprint of our manufacturing process, supporting green building certification systems like LEED and BREEAM.
Refining cell crosslinking methods to increase our maximum operating limit from 105°C to 150°C. This expands application possibilities for low-pressure steam and solar thermal systems.
Common questions from design engineers, purchasing agents, and mechanical contractors answered by the Kingflex team.
A1: It is mainly used for HVAC ducts, air conditioning pipes, building thermal insulation, industrial pipeline cold insulation, and sound insulation.
A2: Yes, our rubber foam insulation is fire retardant, meeting the safety standards of both commercial building and heavy industrial projects.
A3: Rubber foam is flexible, closed-cell, and highly moisture-proof, making it suitable for HVAC and chilled water lines. Rock wool is high-temperature resistant and fireproof, making it ideal for high-temperature industrial steam lines.
A4: Yes, we offer comprehensive OEM services to meet specific project needs, including customized thicknesses, colors, and dimensions.
A5: Our products have passed BS 476, CE, REACH, ROHS, UL94, ASTM, and other international certifications, ensuring product quality and compliance with global standards.
A6: Yes, Kingflex maintains batch traceability control for raw materials and finished products across our lines.
A7: We can produce sheets ranging from 6mm up to 50mm in thickness.
A8: The expected service life is approximately 10 to 15 years under typical indoor and outdoor conditions, provided it is properly installed and maintained.
A9: The closed-cell structure of Kingflex NBR/PVC prevents environmental moisture from reaching the pipe surface. By blocking oxygen and water, it reduces the risk of Corrosion Under Insulation (CUI) without requiring extra vapor barriers.
A10: Yes. However, for outdoor installations, we recommend using UV-resistant coatings or aluminum foil-clad sheets to protect the material from direct ultraviolet degradation and weathering.
Select from our complete range of specialized NBR/PVC insulation rolls, tubing systems, and soundproofing boards.
