Kingflex
Direct access to our certified sound dampening and thermal barrier products engineered for high-performance HVAC systems.
In commercial building design, modern HVAC networks serve as both the circulatory system and a primary source of acoustic disturbance. Airborne noise generated by fan blades, mechanical friction, and turbulent airflow propagates rapidly through metallic duct walls, creating significant structure-borne and airborne disturbances. To achieve the rigorous noise rating (NR) and noise criterion (NC) standards mandated by modern structural specifications, engineers rely on high-performance elastomeric duct sound dampening systems.
Unlike traditional porous materials like fiberglass or open-cell mineral wools, NBR/PVC closed-cell elastomeric rubber foam insulation functions through a dual-mechanism approach. Its dense elastomeric cellular walls act as structural dampers that alter the resonant frequencies of sheet metal ducts, reducing structural vibration (breakout noise). Simultaneously, the micro-cavities within the elastomeric matrix absorb high-velocity air turbulence, dampening inline airborne acoustics without risking fiber erosion or degrading indoor air quality (IAQ).
China has solidified its position as the global center for high-performance elastomeric materials, with Dacheng leading as the capital of green building insulation technology. This regional manufacturing ecosystem coordinates raw material sourcing, chemical processing, extrusion engineering, and regulatory testing. For global industrial buyers, this cluster dynamic translates into reduced lead times, strict cost control, and massive scalability.
As a premier manufacturer within this industrial base, Kingflex Insulation Co., Ltd. runs five fully automated, high-precision assembly lines. Automated compounding and extrusion processes ensure cell uniformity, structural stability, and consistent thermal conductivity across bulk production runs. This infrastructure enables a steady production output of over 600,000 cubic meters annually, satisfying the fast-tracked scheduling requirements of major global infrastructure developers.
Equipped with 5 continuous vulcanization lines, ensuring dimensional stability and uniform foam thickness from 6mm up to 50mm without variance.
Every batch undergoes inline laser inspection and mechanical property validation. Batch numbers offer complete tracking from chemical raw material to job-site delivery.
Proprietary halogen-free and standard fire-suppressant compound technologies achieve self-extinguishing ratings under critical global criteria.
Engineered for versatility across thermal, acoustic, and cryogenic applications, Kingflex products maintain reliable physical properties under demanding operational ranges (-40℃ to 105℃ for standard systems; ultra-low parameters for cryogenic lines).
| Property | Black Rubber Foam Insulation Sheet Roll | Black Rubber Foam Insulation Pipe |
|---|---|---|
| Base Composition | NBR/PVC Elastomeric Foam Matrix | NBR/PVC Blend with Extrusion Additives |
| Available Thickness | 6mm to 50mm | 9mm to 40mm |
| Core Density Range | 40 - 55 kg/m³ | 40 - 55 kg/m³ |
| Thermal Conductivity (λ) | ≤ 0.034 W/(m·K) at 0℃ | ≤ 0.035 W/(m·K) at 0℃ |
| Operational Temp. Range | -40℃ to +105℃ | -40℃ to +105℃ |
| Cell Structure Type | Closed-Cell (Closed-cell rate ≥ 98%) | Closed-Cell (Closed-cell rate ≥ 98%) |
| Flame Spread Index | Class 0 / Class 1 (BS 476 Part 6/7) | Class 0 / Class 1 (BS 476 Part 6/7) |
| Compression Resilience | ≥ 80% recovery rate | ≥ 80% recovery rate |
| Water Vapor Resistance (μ) | ≥ 10,000 (moisture barrier integrated) | ≥ 10,000 (moisture barrier integrated) |
Our dampening materials adapt to distinct building conditions, climates, and strict international building codes. Kingflex is formulated to perform reliably under varied environment-specific demands:
Applied on primary supply and return ducts in office towers, hospitality complexes, and educational campuses. Minimizes standard fan rumble and wind rush, preventing structural resonance through sheet metal seams.
High-airflow computer room air handlers (CRAH) create high static pressures. The high compression resilience of Kingflex prevents material erosion, ensuring dust-free air channels critical for high-density server configurations.
Meets low-VOC outgassing requirements. The non-fibrous closed-cell rubber structure does not support microbial growth or release dust particles, satisfying ISO Class 4 cleanroom requirements.
Global construction projects demand verified raw material safety, standardized environmental performance, and certified fire resistance. Kingflex insulation products hold international certifications to simplify regional approvals:
Class 0 flame-spread and propagation rating for high-occupancy commercial projects.
Verified flame spread index under 25 and smoke developed index under 50 for plenum installations.
Full conformance with European Union construction codes and certified production processes.
Formulated without hazardous chemical components, ozone-depleting substances, or heavy metals.
Established by the Jinwei Group in 1979, Kingflex holds a long manufacturing history in northern China. As the first thermal insulation factory north of the Yangtze River, we have spent decades refining elastomeric compound formulas and expansion methods.
Today, Kingflex operates as a combined manufacturing and trading enterprise. Our R&D department features eight specialized materials engineers focused on thermodynamic efficiency, acoustic dampening, and low-temperature elastomeric formulations. Six dedicated international sales representatives manage global operations, ensuring technical clarity, customs support, and smooth ocean freight logistics.
Our products are evaluated in accredited laboratories and verified through chat histories and real-world project deployments across critical infrastructure.
BS 476 Fire Performance Certification
FM Approval & Quality Systems Standard
REACH Chemical Compliance Declaration
ISO 9001 Factory Quality Management
Below are screenshots of client chats showing real-world product approvals and quality performance verifications:
Our insulation and acoustic materials are deployed in commercial developments, logistics hubs, and processing facilities worldwide.
Verify product details and request targeted quotes directly from our technical sales team:
Beyond our primary HVAC product lines, we manufacture specialized high-performance insulation sleeves, rock wool boards, and cryogenic barriers to serve chemical processing plants, marine installations, and deep-freeze transport networks:
Rubber elastomeric foam insulation tube
Corrosion Resistant Rubber Foam Insulation Tube
Elastic Rubber Foam Insulation Pipe
Black Rubber Foam Insulation Pipe
Foam Rubber Foam Insulation Tube
HVAC Rubber Foam Insulation Tube
Elastomeric rubber foam insulation system
Kingflex flexible insulation material
Cryogenic rubber foam
Elastomeric cryogenic insulation
Rock Wool Insulation Board
Rock wool thermal insulation blanket
