In modern industrial, commercial, and residential construction, the energy efficiency of Heating, Ventilation, and Air Conditioning (HVAC) systems is a key operational cost driver. High-performance ventilation duct insulation prevents thermal leakage, controls surface condensation, and dampens mechanical vibration noise. Standard NBR/PVC elastomeric rubber foam insulation sheets and tubes have emerged as industry-standard materials due to their closed-cell structure, low thermal conductivity, and resistance to water vapor transmission.
With global standards tightening around building carbon neutrality, HVAC systems must minimize energy losses. Without proper insulation, cold-air ducts running through warm ambient spaces experience severe condensation. This moisture damages drywalls, reduces indoor air quality via mold growth, and corrodes the metal sheet of the duct itself. Utilizing premium-grade insulation minimizes heat transfer, keeps the surface temperature above the ambient dew point, and supports long-term structural integrity.
Note on Engineering Standards: Design thermal calculations for industrial duct insulation should align with ASHRAE 90.1, BS EN 12097, and international green building regulations. Choosing the right material ensures stable R-values and fire safety compliance across different climates.
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for thermal insulation products. Kingflex's research development and production department is located in the capital of green-building materials in Dacheng, China. It is an energy-saving, environmental friendly enterprise focusing on research, development, production, and sales. In operation, Kingflex takes energy saving and consumption reduction as its core concept. We provide insulation solutions via consulting, R&D production, installation guidance, and post-sale service to lead the development of the global building materials industry.
Established by the Jinwei Group, which has more than 40 years of history, Kingflex carries forward a legacy of quality. Kingway Group, established in 1979, was the first manufacturer of thermal insulation materials north of the Yangtze River. Today, Kingflex has 5 large automatic assembly lines, with an annual production capacity of more than 600,000 cubic meters, making it a designated supplier for key energy, electric power, and chemical industry projects in China.
Kingflex thermal insulation products are widely used in construction, petroleum, chemical, national defense, aerospace, and other industries. Our formulations feature high-grade NBR (Nitrile Butadiene Rubber) blended with PVC, providing a flexible elastomeric matrix. This closed-cell structure, with a rate exceeding 98%, traps microscopic air pockets, preventing heat conduction and convection.
Our commitment to quality is backed by international certifications. Kingflex products meet BS 476, CE, REACH, RoHS, UL94, and ASTM standards. This ensures safety compliance across major global markets, allowing engineers to specify Kingflex for projects in Europe, North America, Southeast Asia, and the Middle East.
| Insulation Property | Kingflex Rubber Foam | Traditional Rock Wool | Glass Wool |
|---|---|---|---|
| Thermal Conductivity (0°C) | ≤ 0.034 W/(m·K) | ≤ 0.040 W/(m·K) | ≤ 0.036 W/(m·K) |
| Moisture Resistance (μ) | ≥ 10,000 (Closed-cell) | No barrier (Requires wrap) | Low (Requires outer jacket) |
| Fire Safety Rating | Class 0 / Class 1 (BS 476) | Non-combustible (Class A) | Non-combustible (Class A) |
| Flexibility & Install | Excellent (Saves up to 40% labor) | Rigid / Fibrous (Dust hazard) | Flexible / Fibrous (Shedding risk) |
Depending on the location and project type, ventilation systems face varying ambient conditions. Kingflex systems are engineered to perform across diverse operational environments:
The manufacturing process of elastomeric foam has transitioned from conventional batch operations to continuous automated vulcanization. Kingflex's facility features 5 automated extrusion and foaming lines. Precise temperature control during the expansion phase results in a uniform, high-density cell matrix, ensuring consistent thermal and mechanical performance across the entire sheet roll.
Looking ahead, Kingflex is focusing on bio-based raw materials and halogen-free fire retardants to meet future green building requirements. By reducing the carbon footprint of NBR/PVC production, we aim to provide high-performance insulation that aligns with circular economy goals.
The Dacheng industrial region in Hebei Province acts as a cluster for green building materials, offering logistical and manufacturing support. Our close proximity to raw material suppliers minimizes transportation costs and ensures a steady supply of rubber elastomers and additives, keeping production schedules predictable.
With an annual capacity of 600,000 cubic meters, Kingflex handles large orders for global distributors and industrial projects. Automated raw material dosing, inline thickness inspection, and high-speed packaging lines help maintain consistent quality. By shipping from nearby Tianjin Port, we reduce transit times and provide competitive shipping rates for our international clients.
We work closely with engineering consultants and procurement leads globally, offering detailed drawings, technical parameters, and testing reports. This clear communication helps simplify the validation process for complex engineering projects.
Kingflex insulation materials are applied across commercial HVAC, industrial piping, and low-temperature projects worldwide.
Kingflex
