China Insulated Air Duct Factory & Pricelist

High-Performance Elastomeric Foam Insulation & Custom Air Duct Solutions. Direct from Jinwei Group - 40+ Years of Manufacturing Expertise.

A Solid Foundation: Kingflex Insulation & Jinwei Group

Kingflex Insulation Co., Ltd. represents the peak of thermal insulation engineering in China. As a premier manufacturer and trading conglomerate, we are strategically based in Dacheng, China—historically recognized as the global cluster for green building materials.

Established under the aegis of the Jinwei Group (founded in 1979, holding over 40 years of pioneering history), Kingflex inherited a legacy of technical brilliance. Jinwei Group was the first manufacturer of thermal insulation materials north of the Yangtze River, paving the way for China's modern HVAC raw material systems.

Today, our facility focuses on energy-saving, environmentally conscious research, development, and high-volume output. We don't just supply products; we provide end-to-end, integrated solutions spanning technical consultation, R&D custom formulations, detailed installation guidance, and structured post-sale support.

Kingflex Factory Manufacturing Hub

Global HVAC Trends & Procurement Dynamics

As green building certifications (LEED, BREEAM) tighten and global energy prices fluctuate, structural HVAC thermal efficiency has transitioned from a utility to a core regulatory requirement.

600K+
Annual Capacity (m³)
5
Automatic Assembly Lines
66+
Export Destinations Worldwide
40+
Years of Manufacturing Heritage

Macro Procurement Trends & The Chinese Supply Chain Advantage

International mechanical, electrical, and plumbing (MEP) contractors seek manufacturers who can balance cost efficiency with stringent safety certifications. High performance elastomeric NBR/PVC foam insulation is the industry standard for preventing condensation, managing thermal loss, and providing structural acoustics.

Our state-of-the-art automatic production capacity allows Kingflex to supply massive volumes of Class 0 and Class 1 fire-rated insulation materials at competitive factory pricing. By offering a standardized pricelist coupled with highly customizable thickness profiles (from 6mm up to 50mm), we streamline global logistics pipelines for complex industrial plants, airports, cleanrooms, and commercial complexes.

Technical Specifications & Standards

Standardized parameters for Kingflex Black Rubber Foam Insulation Sheet Rolls & Pipes

Parameter Insulation Sheet Roll Specification Insulation Pipe Specification
Material Base Premium NBR/PVC (Nitrile Butadiene Rubber / Polyvinyl Chloride) blend Premium NBR/PVC blend with advanced extrusion foaming
Thickness Range 6mm to 50mm 9mm to 40mm
Inner Diameter (ID) N/A (Flat sheet/roll format) 6mm to 114mm (Accommodates standard copper & steel pipe dimensions)
Density 40 - 55 kg/m³ 40 - 55 kg/m³
Service Temperature -40℃ to 105℃ -40℃ to 105℃
Closed-Cell Rate Over 98% (Ensures low moisture absorption & stable thermal conductivity) Over 98% (Limits convection heat transfer within the material)
Flame Retardancy Self-extinguishing, BS 476, UL94, ASTM compliance Self-extinguishing off fire
Key Advantages High compression resilience (>80%), low thermal conductivity Integrated vapor barrier, zero pipe freezing, anti-vibration

Physical & Thermodynamic Merits

Our raw material compounding uses a unique vulcanization technique to secure a highly cross-linked, uniform closed-cell structure. With a closed-cell rate exceeding 98%, the material forms a permanent barrier against moisture intrusion, preventing condensation and corrosion under insulation (CUI) on air ducts and cold water pipelines.

The elasticity of Kingflex elastomeric foam simplifies installation on compound joints, valves, T-junctions, and round/rectangular air ducts, dramatically decreasing labor costs on-site.

Kingflex Material Elasticity and Installation Ease

Macro Industry Solutions & Applications

Tailored thermodynamic systems engineered for critical infrastructure and demanding industrial sectors.

1. HVAC & Cleanroom Systems

Provides insulation for supply and return air ducts, fan coil units, and central HVAC components. Ideal for cleanroom systems due to low particle emission and zero fiber shedding.

2. Cryogenic & Process Cooling

Specialized systems for ultra-low temperature projects, LPG/LNG storage, chemical processing plants, and food chain distribution networks requiring thermal protection at extreme temperature bounds.

3. Commercial & Civil Infrastructure

Acoustic attenuation and thermal insulation for high-occupancy environments, including hotels, hospitals, transport hubs, and high-rise apartments, with a focus on fire safety compliance.

Comprehensive Application Landscape

Our NBR/PVC elastomer systems are extensively utilized across several critical vectors:

  • Central Air Conditioning: Insulates both chilled water pipelines and air supply duct systems to prevent external condensation.
  • Building Insulation: Wall, roof, and basement thermal and sound-absorbing structures.
  • HVAC & Water Supply: Crucial anti-condensation and anti-freeze shielding for municipal pipelines.
  • Industrial Plants: Heavy-duty insulation for high-pressure steam pipes, chemical machinery, and storage tanks.
  • Acoustic & Vibration Isolation: High-density lining inside machine rooms, ventilation shafts, and theaters.
  • Rail Transit & Cold Chain: Lightweight insulation panels designed for locomotives, ship bulkheads, and cold storage units.
  • Chemical Processing: Outstanding resistance to acidic and alkaline environments, offering both thermal security and pipe protection.
Kingflex Corporate Team

R&D Strength and Human Capital

Our workforce is our primary asset. The Kingflex team operates with a unified vision: to deliver first-class insulation systems that reduce energy consumption globally.

Our organizational framework comprises:

  • 8 Dedicated R&D Engineers: Focused on advanced polymeric chemistry, foaming dynamics, and fire-resistant additive formulations.
  • 6 Professional International Trade Officers: Streamlining customs, regional logistics, and international project billing.
  • 230 Skilled Production Workers: Operating across our automatic assembly lines under strict ISO 9001 and ISO 14001 guidelines.

R&D, Quality Assurance & Certification Portfolio

We test every production run to ensure compliance with international construction codes.

Kingflex R&D Lab Setup
Polymer Testing Machinery
Thermal Conductivity Testing

Certified Performance, Worldwide Compliance

To operate seamlessly in global markets, Kingflex products undergo third-party auditing and testing. We maintain compliance with: BS 476 (Parts 6 & 7), CE Certification, REACH, RoHS, UL94, and ASTM standards.

We run a rigorous raw material tracking and manufacturing process control system. Every batch of elastomeric foam leaving our factory is traceable, ensuring long-term accountability for project developers and engineering partners.

ISO Certification Certificate
SGS Compliance Document
Fire safety Test Report
CE Mark Certificate

Project References & Partner Validation

Kingflex insulation systems are deployed across commercial, municipal, and industrial projects worldwide.

HVAC Ducting Site Installation
Insulated Air Ducts in Commercial Complex
Process Pipe Cold Insulation
Cleanroom HVAC Insulation Sheet Roll

Verified Customer Conversations

Client relationships are built on consistent performance and reliable logistics. We work closely with international engineering consultants to verify every product parameter before shipment.

See our communication logs showcasing customer satisfaction, order updates, and technical coordination.

Client Communication Screenshot 1
Client Communication Screenshot 2
Client Communication Screenshot 3
Client Communication Screenshot 4
Client Communication Screenshot 5

Inside the Kingflex Factory

A look at our automated extrusion, foaming, cutting, and packaging processes.

Extrusion Processing
Foaming Line Operations
Continuous Sheet Vulcanization
Custom Slitting Services
Warehouse Storage Facility
Rigid Quality Check Center
High Temperature Testing Oven
Finished Roll Packing
Logistics Container Loading
Shipment Inspection
Bulk Pipeline Orders
Global Supply Hub Shipping

Our Global Commitment

Providing high-efficiency thermal, cryogenic, and acoustic insulation solutions to global industries.

Production Capacity & Supply Chain Scaling

Kingflex runs 5 large automatic assembly lines, yielding an annual capacity exceeding 600,000 cubic meters. This high production volume makes us a key supplier designated by critical energy, electric power, and chemical authorities across China and international economic corridors.

We manage bulk raw materials directly to insulate ourselves from market fluctuations, maintaining stable pricelists for global MEP contracts even during supply shocks.

Corporate Responsibility & ESG Alignment

We focus on eco-friendly, energy-efficient engineering. Our factory processes minimize ozone-depleting materials (ODP) and global warming potential (GWP), meeting strict environmental guidelines.

We provide complete insulation, cold insulation, and acoustic reduction solutions that help customers meet green building standards, reducing long-term energy costs.

Frequently Asked Questions (FAQ)

Technical details, compliance standards, and product customization options.

Q1: What is elastomeric rubber foam insulation used for?
Elastomeric rubber foam insulation is primarily used for insulating HVAC ducts, central air conditioning pipes, building envelopes, industrial process lines, and cryogenic installations. Its closed-cell structure makes it ideal for preventing condensation and thermal bridging in cold water lines, while also providing sound absorption in mechanical ventilation shafts.
Q2: Is Kingflex rubber foam insulation fire resistant?
Yes, Kingflex rubber foam insulation is flame retardant and self-extinguishing. It complies with international safety standards, including BS 476 Part 6 & 7, Class 0 and Class 1, UL94, and ASTM E84, making it suitable for high-occupancy commercial projects and industrial environments.
Q3: What is the difference between rubber foam and rock wool insulation?
Rubber foam is flexible, has a closed-cell structure, and offers built-in resistance to moisture and vapor, making it excellent for cold pipelines, HVAC systems, and environments prone to condensation. Rock wool is a fibrous material with high temperature resistance, making it suitable for high-temperature steam lines, industrial furnaces, and applications that require strict structural fireproofing.
Q4: Do you provide customized insulation products?
Yes, we offer complete OEM and custom manufacturing services. We can adjust the thickness (from 6mm to 50mm), internal diameter, backing adhesives, and outer foil coatings (such as aluminum cladding for outdoor weathering protection) to meet your specific project needs.
Q5: What certifications do your products have?
Kingflex insulation products are certified to global standards, including BS 476, CE, REACH, RoHS, UL94, and ASTM. This guarantees compliance with global environmental regulations and building safety codes.
Q6: Does Kingflex have a product traceability system?
Yes. Every production run undergoes quality checks, and each batch is labeled with production run codes. This allows for full traceability from raw materials to the delivered project.
Q7: What thickness of Rubber foam insulation sheet roll can you produce?
We produce rubber foam sheet rolls in thicknesses ranging from 6mm to 50mm. Thicker options are ideal for heavy-duty industrial pipe cooling, while thinner profiles suit space-constrained HVAC duct installations.
Q8: What is the typical service life of your rubber foam pipes and boards?
Under typical indoor operating conditions and proper installation, Kingflex products have an expected service life of 10 to 15 years. For outdoor use, applying a protective weather barrier or aluminum cladding helps maximize life expectancy.
Q9: How does Kingflex maintain stable thermal conductivity?
By maintaining a closed-cell structure of over 98%, our material limits convective heat transfer and prevents moisture penetration. Keeping moisture out is key, as any water absorption would degrade the material's thermal resistance.
Q10: What is the density of Kingflex elastomeric insulation, and why does it matter?
Our standard density is 40 to 55 kg/m³. This density offers the optimal balance between mechanical strength, flexibility, and thermal conductivity. Lower densities can compromise structural integrity, while higher densities may reduce flexibility.