Years of Manufacturing Heritage
m³ Annual Production Capacity
Global Export Countries
Closed-Cell Foaming Rate
Engineered to mitigate energy loss and condensation in high-demand HVAC and building applications.
High-density NBR material offering thermal insulation, extreme flexibility, and anti-condensation for industrial cooling systems.
Vibrant color coding options for HVAC line identification. Provides clean, reliable moisture barrier performance.
Laminated with premium aluminum foil cladding to shield against mechanical damage, UV rays, and vapor migration.
Perfect for architectural applications requiring color-differentiated pipelines, featuring excellent insulation metrics.
Optimized low-density structure providing lightweight heat barrier features with foil reinforcement for complex duct shapes.
Fitted with high-strength pressure-sensitive adhesive backing. Dramatically reduces installation labor and time.
Formulated with advanced fire-retardant additives to satisfy strict building codes and international BS 476 standards.
High-precision micro-bore elastomeric piping designed specifically for split air conditioning and refrigeration lines.
An in-depth analysis of high-performance closed-cell insulation, market evolutions, and manufacturing capabilities.
In modern industrial process engineering and building envelope construction, managing thermal transfer is a critical pillar of energy conservation. Flexible Elastomeric Insulation (FEI), predominantly composed of Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC), has emerged as the premier choice for cold conservation and HVAC applications worldwide. Its unique closed-cell geometry offers a built-in vapor barrier, making it superior to traditional open-cell materials like mineral wool or fiberglass in applications where condensation control is paramount.
Globally, strict energy codes (such as ASHRAE 90.1, IECC, and European EN standards) require insulation materials to maintain long-term low thermal conductivity ($\lambda \le 0.034$ W/m·K at 0°C) and robust water vapor resistance ($\mu \ge 10,000$). When moisture penetrates an insulation layer, its thermal efficiency decreases significantly. Flexible elastomeric foam addresses this directly: its closed-cell cells do not absorb water, preserving system efficiency throughout the infrastructure's lifetime.
The performance of NBR/PVC elastomeric foam depends on two factors: the compounding ratio of base rubbers and the precision of the continuous extrusion-foaming process. High-performance elastomeric insulation must balance flexibility for quick installation with high density and cell uniformity for reliable insulation.
Our manufacturing facility uses advanced chemical blowing agents to generate billions of micro-cells. This ensures a closed-cell rate of over 98%, which blocks air circulation and limits heat convection. By integrating flame retardant packages (containing alumina trihydrate, halogenated compounds, or nitrogen-based synergists), the composite achieves BS 476 Class 0 and UL 94 V-0 flame ratings. It self-extinguishes upon fire source removal and generates minimal toxic smoke.
No external vapor barriers are needed. The entire material thickness serves as a barrier, preventing corrosion under insulation (CUI) on steel pipes.
Its viscoelastic nature absorbs low-frequency vibrations, dampening noise from turbulent fluid flow in HVAC ducts and industrial pipes.
Maintains structural flexibility and thermal performance from cryogenic ranges (-40°C or lower) up to continuous operation limits of 105°C.
Located in Dacheng, China—the recognized capital of green-building materials—Kingflex is a leading professional manufacturer and exporter of premium thermal insulation products. As an energy-saving, environmentally friendly enterprise, Kingflex integrates advanced R&D, automated manufacturing, and global trade operations. We view energy conservation and emissions reduction as core duties, providing end-to-end consulting, R&D production, installation guidance, and dedicated post-sales support.
Kingflex was founded by the Jinwei (Kingway) Group, an industry leader with over 40 years of history. Established in 1979, Jinwei Group was the first manufacturer of thermal insulation materials north of the Yangtze River, paving the way for China's modern insulation industry.
At Kingflex, our team's collective expertise drives our success. We maintain a collaborative, high-performance workspace focused on delivering first-class service to our global clients.
Kingflex operates 5 state-of-the-art automatic assembly lines to ensure reliable supply for large-scale global projects.
With an annual capacity exceeding 600,000 cubic meters, Kingflex is a designated manufacturer for China's Ministry of Energy, Ministry of Electric Power, and Ministry of Chemical Industry.
Over the past 16 years, our products have reached more than 66 foreign countries, serving major infrastructure, industrial cooling, and HVAC projects.
To supply global markets with complete energy-saving insulation systems, serving as an integrated partner for building and industrial soundproofing, heat retention, and cryogenic protection.
All Kingflex insulation products undergo regular third-party inspections to meet international code requirements.
Our elastomeric NBR sheets and pipes are fully certified for flame spread, smoke development, thermal conductivity, and environmental safety. With certifications including BS 476, CE, REACH, ROHS, UL94, and ASTM, Kingflex provides dependable compliance for projects around the world.
This strict adherence to international standards enables us to support infrastructure projects, chemical plants, cleanrooms, and commercial real estate developments globally.
Standard and custom options for elastomeric sheet rolls and pre-formed pipe insulation.
| Property | Specification Details |
|---|---|
| Material Composition | Premium Nitrile Butadiene Rubber / Polyvinyl Chloride (NBR/PVC) |
| Thickness Range | 6mm - 50mm |
| Core Density | 40 - 55 kg/m³ |
| Operating Temperature | -40℃ to 105℃ |
| Closed-Cell Rate | ≥ 98% |
| Moisture Resistance | High resistance factor ($\mu \ge 10,000$) |
Central HVAC ductwork; building wall, roof, and basement insulation; industrial tanks; cold storage linings; marine engine room soundproofing; and chemical piping.
| Property | Specification Details |
|---|---|
| Material Composition | Premium Nitrile Butadiene Rubber / Polyvinyl Chloride (NBR/PVC) |
| Wall Thickness | 9mm - 40mm |
| Inner Diameter (ID) | 6mm - 114mm |
| Core Density | 40 - 55 kg/m³ |
| Thermal Conductivity | $\le 0.034$ W/m·K at 0°C |
| Flexibility & Strength | Elongation at break ≥ 100% |
Chilled and hot water pipes; VRF refrigerant lines; commercial AC systems; plumbing lines in hotels and hospitals; process piping in chemical plants; and solar thermal loops.
We work closely with clients worldwide to ensure timely shipping, custom labeling, and reliable material delivery.
The global insulation market is transitioning toward environmentally friendly alternatives with zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP). Advanced factories are shifting away from halogenated flame retardants in favor of eco-friendly formulas that limit smoke toxicity while preserving thermal performance.
Additionally, automated manufacturing is improving cell structure consistency. Kingflex's 5 continuous extrusion lines utilize integrated feedback loops to maintain uniform sheet density. This provides reliable thermal resistance across large-scale projects and minimizes installation waste.
When selecting a Chinese manufacturer, international buyers should evaluate several key metrics beyond unit price:
Get answers to common technical, logistics, and product questions regarding Kingflex elastomeric insulation.
It is primarily used for commercial and industrial HVAC ductwork, hot and cold plumbing lines, refrigeration systems, process piping, and industrial acoustic dampening.
Yes. Our insulation sheets and tubes contain specialized flame-retardant additives to meet international BS 476, CE, and UL94 fire safety standards.
Rubber foam is a flexible, closed-cell material with high moisture resistance, making it ideal for refrigeration, HVAC, and anti-condensation applications. Rock wool is a high-temperature mineral fiber insulation better suited for heavy industrial fire protection and steam lines above 150°C.
Yes. We offer OEM/ODM services, allowing customization of thicknesses (6mm to 50mm), pipe IDs, adhesive backings, and aluminum foil laminations.
Kingflex products are certified under BS 476, CE, REACH, RoHS, UL94, and ASTM standards, ensuring compliance with global building and industrial codes.
Yes. Every production run is batch-coded and tracked through our QA system, ensuring full traceability from raw materials to shipped products.
We manufacture flexible sheet rolls in thicknesses ranging from 6mm to 50mm to suit diverse thermal requirements.
When properly selected and installed according to specifications, Kingflex rubber foam insulation provides a service life of 10 to 15 years.
High-density sheets, cryogenic barriers, and rock wool options for advanced projects.
Provides strong adhesion and consistent insulation thickness, simplifying large-scale installation on air ducts.
Features a highly moisture-resistant outer layer to protect outdoor pipelines from environmental damage.
High-density foam optimized for soundproofing HVAC ducts, dampening mechanical vibrations, and blocking external noise.
Specially formulated to maintain flexibility and block heat transfer at cryogenic temperatures, preventing system stress.
Highly flexible, durable pre-formed tubing designed for quick installation on residential and commercial HVAC piping.
Versatile flat foam sheets for large-diameter storage tanks, cleanroom lining, and complex industrial equipment.
Extruded from selected raw materials to provide durable mechanical protection and thermal stability.
NBR/PVC blend tubing designed for industrial cold-preservation, featuring low thermal conductivity.
A visual guide to our automated extrusion lines, testing labs, raw material warehouses, and finished goods logistics.
Kingflex