Kingflex
Engineered to mitigate low-to-high frequency airborne and structure-borne noise in mechanical ventilation networks.
In contemporary commercial architectures, indoor environmental quality (IEQ) has transformed from a structural option into a key compliance criteria. High-output HVAC networks are the arterial systems of modern buildings, but they are also prominent sources of low-frequency rumble, vibrational transfer, and air-velocity noise. Our HVAC duct sound dampening systems are engineered at a molecular level to absorb, decouple, and block these problematic acoustic frequencies.
Traditional insulation materials like open fiberglass are increasingly restricted due to concerns over particulate shedding, fiber migration, and moisture retention that leads to mold growth. By utilizing a closed-cell elastomeric NBR/PVC matrix, we ensure that our acoustic dampening layers provide dual benefits: superior mechanical sound attenuation and reliable condensation control, without compromising the indoor air quality.
How modern regulatory frameworks and green building standards shape sound and thermal management systems worldwide.
Global net-zero mandates require duct systems to minimize thermal energy loss. Our NBR/PVC elastomeric foam features an extremely low thermal conductivity (down to 0.034 W/m·K at 0°C), significantly reducing energy loads on chillers and boilers.
International environmental regulations, including ASHRAE standards and OSHA directives, enforce strict maximum decibel limits in workplaces and residential structures. High-density elastomeric barriers prevent noise from traveling through duct networks.
IAQ (Indoor Air Quality) is key in LEED and WELL specifications. Our materials are completely fiber-free, formaldehyde-free, and low-VOC emitting, preventing the growth of molds, bacteria, and particulate contaminants in supply and return airflows.
Kingflex Insulation Co., Ltd. is a leading manufacturer and exporter of high-quality thermal and acoustic insulation systems. As a subsidiary of the Jinwei Group, established in 1979, we trace our heritage back over 40 years. We were the pioneer manufacturer of thermal insulation materials north of the Yangtze River in China.
Our research, development, and advanced production base is located in Dacheng, China's well-known green building material capital. We manage five high-speed, fully automated assembly lines with an annual output exceeding 600,000 cubic meters. Over the decades, our operations have centered around the core philosophy of sustainable energy conservation. We provide bespoke thermal, acoustic, and cryogenic system designs to project consultants, engineering contractors, and OEM distributors globally.
Comprehensive engineering metrics of Kingflex closed-cell elastomeric duct sound dampening systems.
| Performance Characteristic | NBR/PVC Elastomeric Foam Standard | Testing Standards & Methodologies |
|---|---|---|
| Thermal Conductivity (λ-value) | ≤ 0.034 W/(m·K) at 0°C | ≤ 0.036 W/(m·K) at 20°C | ASTM C518 / ISO 8301 |
| Moisture Resistance Factor (μ) | ≥ 10,000 (Built-in vapor barrier) | BS EN 12086 / DIN 52615 |
| Fire Safety Performance | Class 0 & Class 1 / V-0 Rated | BS 476 Parts 6 & 7 / UL94 |
| Service Temperature Range | -40°C to +105°C (-40°F to 221°F) | ASTM C411 |
| Nominal Density | 40 - 55 kg/m³ | ASTM D1622 / ISO 845 |
| Closed-Cell Structure Rate | ≥ 98% | ASTM D2856 |
| Compression Resilience | ≥ 80% | ASTM D1056 |
Standard Dimensions: Material: NBR/PVC | Thickness: 6mm - 50mm | Density: 40 - 55kg/m³ | Temperature Range: -40℃ to 105℃
Standard Dimensions: Thickness: 9mm - 40mm | ID: 6mm - 114mm | Density: 40 - 55kg/m³ | Temperature Range: -40℃ to 105℃
Continuous investment in engineering, raw material evaluation, and rigorous performance validation.
At Kingflex, innovation drives our development. Our R&D division consists of 8 expert materials scientists and chemical engineers dedicated to refining polymer flexibility, fire performance, and environmental compliance. Our laboratory monitors continuous manufacturing parameters to ensure consistency across batches.
We run multiple validation stages, checking raw NBR inputs, supervising curing ovens, and confirming the cellular structure of finished sheets. Our systems are certified for hazardous substance restriction, holding REACH, RoHS, CE, UL94, BS 476, and ASTM approvals. This guarantees that our products meet regulatory expectations in regional markets worldwide.
Our commitment to reliable, high-performance sound dampening and thermal insulation is backed by international test reports.
Traceability Guarantee: Every batch of Kingflex rubber foam is stamped with a unique manufacturing identifier code. This ensures complete tracing of raw materials, processing shifts, and quality control tests, guaranteeing reliability across long shipping and warehousing cycles.
Providing custom solutions for architectural acoustical control and thermal systems across global projects.
Reduces fan-motor hum and wind turbulent noise within central supply, extract, and return ducting. Promotes quiet, productive indoor environments in hotels, schools, and offices.
Prevents surface condensation and dampens thermal pulsation noise in gas, steam, and liquid chemical pipelines operating under variable thermal loads.
Prevents severe icing and condensation in low-temperature refrigeration systems, cold chain logistics, and marine LNG transport pipes.
Building lasting business relationships requires high product performance and responsive service. We provide direct communications, real-time shipment updates, packaging customizations, and technical installation guidance for every project.
These communication logs demonstrate the positive feedback from our international distribution partners, mechanical contractors, and acoustic consultants.
Operational photos showing direct applications of our insulation and sound dampening materials in diverse projects worldwide.
Expert answers to common engineering questions regarding elastomerics, rock wool, and sound dampening applications.
Elastomeric rubber foam is primarily used to isolate and insulate HVAC air ducts, refrigeration pipelines, air conditioning conduits, hot/chilled water systems, and process lines. Its physical flexibility and structure allow it to control condensation while dampening structural vibrations and reducing airborne noise.
Yes. Kingflex rubber foam insulation contains built-in flame retardants, allowing it to meet international standards such as BS 476 (Class 0 and Class 1), CE, UL94 (V-0 rating), and ASTM. This performance makes it suitable for public, industrial, and commercial construction projects.
Rubber foam features a flexible, closed-cell, dust-free composition with a high moisture resistance factor (μ ≥ 10,000), making it ideal for HVAC condensation control and acoustic dampening. Rock wool is a fibrous material that handles higher peak temperatures (above 400°C), typically used for high-temperature steam lines and firewall assemblies.
Yes, we provide full OEM and ODM services. We customize dimensions, sheet thicknesses, tube inner diameters, density configurations, and laminated finishes (such as aluminum foil, fiberglass mesh, or self-adhesive backings) to match specific project requirements.
Our products hold BS 476, CE, REACH, RoHS, UL94, and ASTM certifications. We regularly test our materials through independent laboratories to verify quality and regulatory compliance for our global distributors.
Yes. Every production run is marked with batch identifiers on the packaging and sheet/tube backings. This lets us trace production line telemetry, raw material batches, processing shifts, and quality control reports.
We manufacture sheet rolls in thicknesses ranging from 6mm up to 50mm, matching standard mechanical specifications for acoustics and thermal management.
When installed correctly, our rubber-plastic insulation products have an operational service life of 10 to 15 years in typical indoor and protected outdoor environments.
High-performance variations for low-temperature containment, pipe wraps, and commercial mineral fiber boards.
