Kingflex
Kingflex
Premium architectural NBR/PVC elastomeric thermal insulation tubing, sheets, and cryogenic solutions.
Operating at the critical intersection of chemistry and HVAC structural engineering, Kingflex Insulation Co., Ltd. has established itself as an authoritative joint manufacturing and trading powerhouse. Headquartered in Dacheng, China—historically acknowledged as the epicentre of green architectural materials—we dedicate our research, development, and massive manufacturing footprints to the production of high-performance closed-cell elastomeric insulation materials.
Founded under the umbrella of the prestigious Jinwei Group, which boasts an extensive history of over 40 years since its inception in 1979, Kingflex carries forward a rich heritage of material innovation. As the pioneer manufacturer of thermal insulation materials north of the Yangtze River, we integrate energy conservation and micro-environmental control into the DNA of our manufacturing process. We support international engineering operations through customized consultation, collaborative R&D, precision manufacturing, site-specific installation guidelines, and comprehensive post-sale support.
Deciphering the molecular matrix of premium NBR/PVC closed-cell foams.
At the core of our insulated copper coil casing technology is a proprietary NBR/PVC closed-cell elastomeric rubber foam matrix. By combining Nitrile Butadiene Rubber (NBR) for flexibility and chemical resistance with Polyvinyl Chloride (PVC) for durability and fire-retardancy, Kingflex creates an impermeable barrier against thermal transfer and moisture migration.
Unlike open-cell materials or generic polyurethane sleeves, our high-density foaming process guarantees a closed-cell rate of over 98%. This uniform cell distribution traps micro-pockets of air, stabilizing thermal conductivity and preventing the structural degradation associated with atmospheric humidity, UV exposure, and mechanical stress.
Maintains stable thermal protection across temperatures from -40°C to 105°C, ensuring optimal energy savings for HVAC systems.
Closed-cell structure blocks water vapor, eliminating the risk of condensation and copper tube corrosion.
Meets strict international safety codes, self-extinguishing immediately upon contact with fire to prevent flame spread.
Modern HVAC installation requires rapid deployment and zero errors. Pre-insulated copper coils cladded with Kingflex NBR/PVC insulation eliminate the need for field sleeving, lowering labor costs and ensuring consistent insulation thickness along the entire run.
Our current manufacturing iteration features enhanced surface finishes to withstand pull-through friction within conduits. By integrating specialized blowing agents and plasticizers during extrusion, we have increased the compression resilience to over 80%. This prevents the insulation from collapsing at bend points, maintaining the design thermal barrier across complex geometries.
Kingflex operates 5 large-scale automated assembly lines, delivering an annual production capacity exceeding 600,000 cubic meters. Our production plant is optimized to serve high-volume orders for global infrastructure, industrial complexes, and OEM supply chains.
Because we control the entire vertical extrusion and foaming process, we mitigate the pricing volatility common in today's global supply chain. Designated as a key production enterprise by the Ministry of Energy, Ministry of Electric Power, and Ministry of Chemical Industry, Kingflex ensures that every cubic meter of foam meets strict engineering specifications. Our facility runs continuous quality inspections, ensuring uniform density (40-55 kg/m³) and exact inner diameters (6mm to 114mm).
Exact physical specifications tailored for global commercial HVACR applications.
Selecting the correct insulation thickness and density is critical to preventing condensation and optimizing thermal efficiency. Under-insulated pipelines are prone to surface condensation, which can lead to structural water damage and mold growth. The table below outlines the standard engineering parameters of Kingflex NBR/PVC elastomeric insulation cladding for copper coil configurations:
| Insulation Material | Wall Thickness Range | Inner Diameter (ID) | Foam Density | Thermal Conductivity (λ) | Service Temperature Limit | Flame Retardant Standard |
|---|---|---|---|---|---|---|
| NBR/PVC Elastomeric Foam | 6mm – 50mm | 6mm – 114mm | 40 – 55 kg/m³ | ≤ 0.034 W/(m·K) at 0°C | -40°C to 105°C | Class 0 / Class 1 (BS 476) |
| Alu-Foil Covered Elastomeric | 9mm – 40mm | 12mm – 114mm | 45 – 55 kg/m³ | ≤ 0.035 W/(m·K) at 0°C | -40°C to 105°C | UL94 V-0, Class 0 BS476 |
| Cryogenic Special Polymeric | 13mm – 50mm | 6mm – 89mm | 50 – 65 kg/m³ | ≤ 0.032 W/(m·K) at -50°C | -200°C to 105°C | ASTM C534 Compliant |
Provides dual-channel insulation for liquid and suction lines, preventing thermal crosstalk and condensation in commercial VRF runs.
Specially formulated closed-cell structures maintain performance at extremely low temperatures, preventing ice formation in cold chains.
Our open-cell variants provide effective sound absorption and vibration damping for equipment rooms, mechanical casings, and duct walls.
In-house testing laboratories, professional diagnostics, and regulatory adherence.
Kingflex has eight professional engineers in our R&D Department, running continuous testing on moisture resistance, chemical compatibility, and aging characteristics. Our products undergo rigorous thermal conductivity, smoke density, and flame propagation tests to ensure consistent performance in demanding environmental conditions.
When specifying insulation for projects in Europe, North America, or the Middle East, regulatory compliance is critical. Kingflex products carry internationally recognized credentials, ensuring they meet localized construction codes and environmental regulations.
Our products have passed BS 476 (Parts 6 & 7), CE, REACH, RoHS, UL94, and ASTM testing. This ensures safety compliance regarding toxic gas release and flame spread, while verifying that our insulation is free of hazardous substances.
Detailed performance parameters for our two core insulation categories.
Designed for large-diameter ducts, tanks, and structural architectural cladding. Features a flexible, high-density matrix that easily wraps around flat or curved surfaces.
Designed for piping systems, including central air conditioning chilled water pipes, hot water systems, and refrigeration lines.
Engineered solutions for industrial HVAC, cryogenic pipelines, and noise control.
Inside Kingflex's automated production workshops.
Verified purchase orders, technical feedback, and ongoing client communication.
We prioritize transparency and reliable communication. Below are verified screenshots of client discussions, covering shipping logistics, custom requests, and delivery coordination with our international sales and engineering support teams.
Comprehensive technical and commercial answers for engineering firms and procurement managers.
Premium elastomeric sheet rolls, specialty tapes, and low-temperature solutions.
