Explore our industrial-grade, closed-cell rubber foam insulation tubes designed for critical mechanical systems, thermal efficiency, and long-term durability.
Kingflex Insulation Co., Ltd. is a leading global developer and manufacturer of advanced elastomeric rubber foam insulation systems. Our production and R&D centers are strategically situated in Dacheng, China—historically recognized as the hub of ecological and green building material manufacturing.
Operating on the fundamental principles of energy conservation, carbon reduction, and cost optimization, we act as a comprehensive solution provider. From initial engineering consultations and custom R&D processes to strict production, installation guidance, and dedicated post-sale support, we lead the industry toward global sustainability goals.
Established by the prestigious Jinwei Group (founded in 1979 as the pioneering manufacturer of thermal insulation materials north of the Yangtze River), Kingflex leverages generations of engineering expertise. Over the past four decades, our team has refined the chemical kinetics of NBR/PVC closed-cell foaming to deliver stable, high-performance insulation systems.
Our operation scale highlights our commitment to supply chain security:
Years of Legacy
Annual Capacity (m³)
Countries Reached
Production Experts
How procurement managers, EPC contractors, and mechanical engineers mitigate thermal loss and control total cost of ownership (TCO).
Industrial procurement is shifting from initial unit cost to lifetime energy-saving performance. Inadequate insulation leads to continuous thermal bridging, structural moisture degradation, and high maintenance costs. Investing in premium closed-cell NBR structures pays off through significantly reduced HVAC runtime and energy bills.
Global architectural standards require materials that limit VOC emissions and contain no ozone-depleting substances. Our elastomeric tubes are manufactured with eco-friendly blowing agents, helping real estate projects secure valuable LEED, BREEAM, and DGNB rating points.
Chilled water systems face continuous risk of surface condensation in humid environments, which can lead to structural mold issues. The high water vapor permeability resistance (µ ≥ 10,000) of Kingflex rubber foam prevents moisture ingress, keeping insulation performance stable throughout its service life.
Tailored elastomeric insulation solutions engineered for optimal performance across complex mechanical systems.
For high-rise commercial structures and luxury hotels, our NBR/PVC elastomeric tubes insulate cold water lines, ventilation ducts, and HVAC refrigerant piping, ensuring quiet operation and minimal energy loss.
Industrial cold storages, gas processing systems, and chemical lines require heavy-duty thermal isolation to handle extreme low temperatures (down to -40℃ or cryogenic ranges). Kingflex provides tailored formulations that maintain flexibility and resist thermal cracking at low temperatures.
Refineries and process plants require high resistance to chemicals and fire hazard mitigation. Our closed-cell rubber insulation stands up to challenging environmental conditions, while preventing under-insulation corrosion (CUI) and reducing fire spread risk.
Our advanced rubber foam insulation lines are engineered for precise physical performance. Designed for simple installation, high mechanical strength, and reliable thermal stability across a broad temperature spectrum.
| Physical Property | Standard Value / Spec | Testing Standard |
|---|---|---|
| Material Composition | Premium NBR/PVC Blend | - |
| Closed-Cell Ratio | > 98% | ASTM D1667 |
| Density Range | 40 - 55 kg/m³ | ASTM D1622 |
| Thermal Conductivity (at 0°C) | ≤ 0.034 W/(m·K) | ASTM C518 / ISO 8301 |
| Water Vapor Resistance Factor | μ ≥ 10,000 | EN 12086 / BS 476 |
| Service Temperature Limits | -40°C to +105°C | ASTM C534 |
| Fire Performance Rating | Class 0 / Class 1 / B1 | BS 476 Part 6 & 7 / UL 94 |
| Available Wall Thickness | 6mm to 50mm (Sheets) / 9mm to 40mm (Pipes) | Custom sizing available |
How our engineering department designs the next generation of industrial elastomeric insulation.
We are phasing out standard chemical blowing agents in favor of high-performance water-foaming technologies. This innovation delivers a GWP (Global Warming Potential) of zero and an ODP (Ozone Depletion Potential) of zero, ensuring compliance with strict environmental regulations like REACH and RoHS.
By blending inorganic flame retardants directly into the elastomer matrix, we achieve a Class 0 fire rating (BS 476) and UL 94 standard compliance. During combustion, the insulation forms a carbon protective layer, suppressing fire spread and minimizing toxic smoke emissions.
Using computerized density controls during continuous extrusion, we achieve an even, high-density cell structure (closed-cell rate > 98%). This cell configuration maintains stable thermal conductivity even under external mechanical pressures.
Proof of performance from key industrial projects, international certifications, and direct client communications.
Kingflex insulation is used by contractors worldwide. From commercial HVAC piping to process pipelines and solar installations, our products meet key international standards:
We maintain full batch traceability from raw polymer mixing to extrusion and dispatch. Our automated enterprise resource planning (ERP) system records vulcanization parameters and mechanical test logs for every batch.
This commitment to quality is why international procurement teams choose Kingflex. Below are verified screenshots of client communications confirming successful field applications, customs clearances, and positive feedback:
Clear, direct answers to common questions about selecting, specifying, and installing elastomeric rubber foam insulation.
A closer look at our continuous extrusion machinery, raw material compounding, and secure shipping logistics.
Select from our range of specialized elastomeric tubes, cryogenic jackets, and industrial accessories.
Engineered systems designed to meet challenging environmental and operational conditions.
Photos from our plant demonstrating our high-volume production capabilities, vulcanization control, and packaging standards.
Get in touch with our engineering team for technical support, dimension specifications, bulk pricing tiers, and direct factory-to-site shipping quotes.
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