Kingflex
Engineered for low-temperature applications, industrial refrigeration systems, and high-demand HVAC infrastructures.
Kingflex Insulation Co., Ltd. stands as a world-class manufacturing and trading combo, specializes in the design, engineering, and distribution of high-grade thermal insulation materials. Strategically based in Dacheng, China—renowned globally as the capital of energy-efficient green building materials—our enterprise seamlessly integrates basic R&D, automated production lines, global sales distribution, and post-installation technical guidance.
Operating with a foundational focus on energy conservation, cost-reduction, and sustainability, we cater directly to global HVAC contractors, industrial facility operators, and OEM partners. By providing comprehensive consulting, state-of-the-art closed-cell elastomeric production, and responsive localization support, we continuously elevate thermal efficiency baselines in more than sixty-six countries across North America, the EU, the Middle East, and Asia-Pacific.
Founded by the distinguished Jinwei Group (established in 1979), Kingflex inherits over 40 years of pioneering technical lineage. Jinwei Group was the first recognized manufacturer of high-performance thermal insulation materials north of the Yangtze River.
Throughout our history, we have continuously transformed raw polymer technology into industrial insulation benchmarks. Driven by a dedicated and highly integrated workforce comprising 8 senior R&D engineers, 6 international trade experts, and over 230 precision operations staff, the company maintains absolute quality control from elastomer formulation to multi-axis vulcanization.
Annual Production Capacity
Jinwei Group Technical Heritage
Export Destinations Worldwide
Automated Production Assembly
For modern civil structures and industrial plants, external condensate pipe insulation plays a decisive role in preventing condensation, corrosion under insulation (CUI), and thermodynamic energy loss. Elastomeric rubber foam (NBR/PVC) stands out due to its unique structure, providing a high water vapor diffusion resistance factor and low, stable thermal conductivity.
Closed-cell structuring locks air pockets in place. Delivers a thermal conductivity (λ) value ≤ 0.034 W/(m·K) at 0°C, drastically lowering structural heat exchange.
With an integrated vapor barrier design, our NBR/PVC compound achieves a moisture resistance factor (μ) ≥ 10,000, eliminating the risk of water ingress.
Tested and certified under BS 476 (Class 0 / Class 1), UL94, and ASTM E84, ensuring self-extinguishing performance and low smoke toxicity levels.
When drafting engineering designs for HVAC chilled water lines and external condensation networks, comparing material properties is essential for long-term reliability.
| Technical Characteristic | Kingflex Elastomeric NBR/PVC Foam | Rock Wool Insulation Board | Glass Wool Blankets |
|---|---|---|---|
| Cellular Structure | Fully Closed-Cell (>98% cell density) | Open Fibrous Matrix | Open Fibrous Matrix |
| Thermal Conductivity (at 0°C) | ≤ 0.034 W/(m·K) | ≥ 0.040 W/(m·K) | ≥ 0.038 W/(m·K) |
| Water Vapor Resistance (μ) | ≥ 10,000 (Built-in Vapor Barrier) | ≤ 1.3 (Needs External Vapor Jacket) | ≤ 1.1 (Needs External Foil Jacket) |
| Working Temp Range | -40°C to +105°C (Up to -200°C for Cryogenic) | Up to +650°C | Up to +400°C |
| Flexibility & Installation | Extremely High; Easy to sleeve and tape | Rigid; Requires mechanical fasteners | Semi-flexible; Skin irritation hazard |
Industrial procurement managers face challenges beyond simple component costs. Managing total cost of ownership (TCO) requires analyzing factory capacity, export certifications, raw material quality, and port logistics. As a designated manufacturer for major state energy projects in China, Kingflex provides an optimized supply chain:
As industrial plants move toward decarbonization and operational efficiency, pipeline insulation faces stricter requirements. The industry is moving away from basic thermal barriers toward multi-layered, climate-resilient systems.
We supply two primary configurations engineered to meet standard specifications across commercial projects:
CUI is an expensive hazard in processing facilities and HVAC outdoor pipelines. When moisture penetrates insulation, it pools against the metal pipe, accelerating oxidation.
Kingflex's elastomeric closed-cell structure addresses this risk. Unlike open-cell glass wool or rock wool, which can absorb moisture via capillary action, Kingflex rubber foam keeps moisture from reaching the pipe surface. The uniform cell structure prevents water vapor movement, protecting carbon and stainless steel piping.
To supply materials for public projects, maritime engineering, and industrial facilities, manufacturers must meet international safety and environmental regulations. Kingflex insulation systems comply with global regulatory frameworks:
Feedback and delivery confirmations from partners across 66+ countries.
Addressing engineering questions, material specs, and installation guidelines.
A1: It is primarily used for HVAC ducts, air conditioning lines, building thermal insulation, industrial pipeline cold insulation, and sound attenuation systems.
A2: Yes. It is formulated with fire-retardants that meet BS 476 Class 0 and Class 1, and UL94 standards. It is self-extinguishing and will not fuel active flames.
A3: Rubber foam is a flexible, closed-cell, moisture-resistant material suited for low-to-medium temperature pipelines ($-40^\circ\text{C}$ to $105^\circ\text{C}$) and HVAC systems. Rock wool is an open-fiber material designed for high-temperature industrial pipelines requiring fire protection up to $650^\circ\text{C}$.
A4: Yes. We offer OEM/ODM services, adjusting wall thicknesses, inner diameters, colors, and backing adhesives to match project specifications.
A5: Our products are certified under BS 476, CE, REACH, ROHS, UL94, and ASTM. This guarantees compliance with regional building codes and safety regulations.
A6: Yes. Each batch is logged with production run data, raw material lots, and curing metrics to ensure full product traceability.
A7: We produce sheet rolls in thicknesses ranging from 6mm to 50mm to meet different thermal barrier requirements.
A8: Under standard operational conditions and when protected from extreme outdoor weathering, the service life averages 10 to 15 years.
A9: Standard rubber foam degrades under prolonged UV exposure. For external condensate runs, we recommend applying UV-resistant coatings or aluminum cladding jackets to prevent degradation.
A10: The PVC component improves chemical resistance, increases tensile strength, and enhances the material's fire performance, while the NBR provides flexibility and low thermal conductivity.
Kingflex materials are specified in airports, commercial centers, and cryogenic facilities worldwide.
Review our full range of flexible closed-cell elastomers, cryogenic sheets, and specialized mineral wool products.
