Kingflex
Kingflex
Premium class closed-cell elastomeric rubber foam insulation series for global industrial supply
In modern architectural HVAC layout planning and complex thermodynamic engineering, control of airborne noise alongside structural vibration is highly critical. Duct acoustic lining materials serve as a primary passive barrier, functioning to systematically absorb high and low-frequency system hums, fluid-shearing aerodynamic noise, and cross-talk inside internal structural paths. Closed-cell elastomeric rubber foam—specifically optimized for duct liners—has emerged as the preferred engineering option, steadily replacing glass fiber insulation due to zero particle shedding, excellent mold resistance, and superior thermal insulation dynamics.
By preventing thermal exchange across mechanical sheet metals and suppressing the mechanical vibration of galvanized duct casings, these engineered elastomeric systems preserve air quality, maintain relative humidity stability, and ensure system acoustics comply with stringent global standards such as ASHRAE 90.1 and ISO 3822.
| Physical & Acoustic Properties | NBR/PVC Elastomeric Duct Lining Standard | Performance Advantages & Compliance Notes |
|---|---|---|
| Thermal Conductivity (λ) | ≤ 0.034 W/(m·K) at 0 °C | Substantially limits heat transfer, preventing surface condensation. |
| Water Vapor Permeability (μ-value) | ≥ 10,000 (Closed-cell ratio >98%) | Eliminates the requirement for extra external vapor barriers. |
| Acoustic Absorption Coefficient (NRC) | 0.45 to 0.70 (depending on thickness) | Minimizes mechanical air-flow whistling and duct drumming. |
| Fire Safety Classification | Class 0 (BS 476 Part 6/7), Class V-0 (UL94) | Self-extinguishing, minimal flame spread and smoke density. |
| Operational Temperature Range | -40 °C to +105 °C (-40 °F to +221 °F) | Perfect for combined cooling/heating systems and cryogenic piping. |
Decades of manufacturing excellence in environmental thermal solutions
Founded under the umbrella of the prestigious Jinwei Group (also recognized internationally as Kingway Group), which possesses a rich, storied manufacturing timeline dating back to 1979, Kingflex stands as the leading pioneer in north China's environmental thermal insulation industry. Strategically based in Dacheng, China—historically celebrated as the industrial capital of green-building materials—our facility integrates complete design, automated extrusion, thermal analysis, and acoustic testing labs under one centralized umbrella.
We do not just produce insulation tubes and sheet rolls; we provide global projects with fully integrated, energy-efficient acoustic and thermal solutions. With five large automatic assembly lines and a dedicated workforce of over 230 manufacturing staff, our infrastructure guarantees consistent product density, flawless cell distribution, and rapid order fulfillment.
Eight professional R&D engineers working inside specialized simulation and physical testing labs
Our material scientists meticulously evaluate foaming density parameters, tensile elongation, and dynamic shear stiffness to optimize sound attenuation characteristics across a wide range of air velocities.
With continuous vulcanization technology, our NBR/PVC sheets achieve an exceptionally fine cell matrix, preventing micro-void ruptures and guaranteeing highly stable thermal conductivity profiles over time.
Every production batch is scanned for thickness uniformity, surface finish consistency, and fire propagation behavior. Automated sensors instantly flag any dimensional deviations.
Our duct acoustic linings and elastomeric insulation systems are tested to meet the rigorous safety and environmental import criteria of over 66 countries. Certifications include BS 476, CE, REACH, RoHS, UL94, and ASTM.
Comprehensive physical and chemical dimensions of Kingflex elastomeric lining solutions
Specially engineered for large-format HVAC duct surfaces. Formulated with NBR/PVC elastomer compound for balanced mechanical flexibility and chemical resistance.
Prefabricated sleeves for mechanical copper and steel piping. Designed to prevent condensation on chilled water pipes while containing structural sound transmission.
Critical macro-economic advantages, structural integration, and cost benefits explained
Based in Dacheng, China—the global capital for environmental insulation—our factory leverages immediate proximity to polymer suppliers, specialized flame retardant chemical producers, and efficient transport networks. This structural synergy reduces overhead costs by 15-20% compared to isolated manufacturers.
Whether your ventilation specs require self-adhesive backings, custom color codes, reinforced aluminum foil facing (Alu-Clad), or specific density modifications for target acoustic frequencies, our engineering team can customize extrusion profiles to meet your project specifications.
With a massive capacity of 600,000 cubic meters per year, we optimize raw material procurement and throughput. The resulting economies of scale are passed directly to mechanical contractors, global distributors, and engineering procurement firms through highly competitive volume discounts.
High-efficiency acoustic and thermal containment solutions across demanding structural environments
Installed internally or externally on galvanized steel supply and return ducts. Prevents high-speed fan noise from transmitting to office spaces and meeting rooms. Zero fiber shedding ensures healthy indoor air quality (IAQ) for schools and corporate buildings.
Specially formulated for ultra-low temperature environments. Prevents ambient moisture ingress and ice buildup on cryogenic pipelines and gas tanks, protecting thermal integrity down to -40 °C.
Used to line the inner walls of chiller rooms, air handler casings, boiler housings, and pump chambers. Dampens structural resonance and prevents low-frequency mechanical noise from escaping the plant room.
Unfiltered communications showing trust, swift response, and client satisfaction
Real-time collaboration across multiple global time zones ensures smooth coordination. Below are verified project communication records demonstrating our commitment to prompt technical response, strict quality control, and seamless shipping logistics.
Technical guidance on selection, acoustics, fire safety compliance, and installation best practices
A1: Closed-cell elastomeric rubber foam is chiefly utilized for thermal and sound insulation in commercial HVAC air ducts, indoor and outdoor chilled water pipes, solar hot water lines, architectural wall cavities, industrial pipelines, and cryogenic equipment systems. It prevents condensation, preserves energy, and reduces vibration.
A2: Yes. Kingflex rubber foam insulation meets strict safety standards. It achieves BS 476 Part 6 & 7 Class 0 status and UL94 V-0 flame-retardant ratings. In the event of a fire, it will not propagate flames and is self-extinguishing, ensuring safe evacuation windows in commercial buildings.
A3: Rubber foam features a closed-cell structural matrix that prevents moisture penetration without requiring a separate vapor barrier. It is flexible and dust-free, making it ideal for indoor air ducts. Rock wool is a fibrous material with excellent high-temperature resistance, making it suitable for high-heat steam pipes, but it requires a vapor jacket in cold environments.
A4: Yes. We offer comprehensive OEM and ODM support. We customize density, thickness, inner/outer diameters, self-adhesive layers, surface facings (like aluminum foil or fiberglass fabrics), and colors to meet project-specific engineering requirements.
A5: Our products have successfully passed international compliance certifications including BS 476, CE, REACH, RoHS, UL94, and ASTM. This ensures our products meet safety and performance standards for projects worldwide.
A6: Yes, trace-codes and batch numbers are printed directly on the material's surface, protective backing, or outer box. This allows us to track raw material formulations and production settings for every order.
A7: We can produce sheets ranging from 6mm to 50mm in thickness. Thicker options are ideal for low-temperature applications that require high thermal resistance to prevent surface condensation.
A8: When installed according to recommended practices, our materials have an average service life of 10 to 15 years. The closed-cell structure resists moisture and environmental degradation, maintaining long-term acoustic and thermal performance.
A unified global service team dedicated to coordinating design, logistics, and on-site setup
Six international sales engineers assist from planning through to delivery. We provide custom CAD layouts, thermal calculations, and container optimization designs.
We provide step-by-step installation support, detailing adhesive applications, seam joining, and jacket installations for complex geometric fittings.
Over 230 manufacturing staff keep our five automated assembly lines operating smoothly, ensuring stable density and dimensional precision for every batch.
Explore our full range of insulation tubes, cryogenic barriers, and rock wool blankets
