Kingflex
High-density elastomeric materials designed to prevent condensation, thermal leakage, and external corrosion on Tubería de Cobre line sets.
Within large-scale HVAC&R engineering, the thermal transport network is the cardiovascular system of thermal management. Modern refrigeration relies on high-precision Tubería de Cobre para Refrigeración (refrigeration-grade copper tubing) to safely transport liquid and gaseous refrigerants under high working pressures. However, copper's exceptionally high thermal conductivity means that without optimal closed-cell insulation, line sets suffer immediate, massive energy losses, critical condensation failures, and rapid degradation from corrosion under insulation (CUI).
Kingflex Insulation Co., Ltd. serves as the vital engineering counterpoint to copper pipe systems. Our closed-cell elastomeric foam materials are custom-engineered to form a perfect thermal barrier around refrigeration copper lines. By limiting heat gain in suction lines and preventing condensation in high-humidity commercial structures, Kingflex directly supports systemic COP (Coefficient of Performance) goals for refrigeration systems worldwide.
The global HVAC&R landscape is transitioning rapidly under strict environmental frameworks such as the Kigali Amendment and regional F-gas regulations. This shift demands system architectures optimized for natural refrigerants like R744 (CO₂), R290 (Propane), and next-generation HFOs. These refrigerants operate under dramatically different pressures and operating temperatures than traditional HCFCs:
Conventional insulation materials like rock wool are highly susceptible to moisture absorption. Once wet, their thermal conductivity ($\lambda$) rises dramatically. Kingflex NBR/PVC elastomeric foam features a closed-cell rate exceeding 98%, sealing out ambient moisture and maintaining stable insulating performance over a decade of continuous operation.
For industrial engineers and procurement leads calculating heat load equations, standard operational specs are non-negotiable. Kingflex maintains strict manufacturing metrics across both elastomeric insulation tubes and sheet rolls:
| Parameters | Standard Specs (Tubes) | Standard Specs (Sheets) |
|---|---|---|
| Material Base | NBR/PVC Elastomeric Foam | NBR/PVC Elastomeric Foam |
| Density Range | 40 - 55 kg/m³ | 40 - 55 kg/m³ |
| Thickness Limits | 9mm to 40mm | 6mm to 50mm |
| Inner Diameter (ID) | 6mm to 114mm (Matches standard copper sizes) | N/A (Roll widths up to 1.5m) |
| Service Temperature | -40℃ to 105℃ | -40℃ to 105℃ |
| Closed-Cell Rate | > 98% | > 98% |
| Moisture Resistance ($\mu$) | High water vapor resistance factor | Excellent moisture diffusion resistance |
Originating from the Jinwei Group (founded in 1979 as the pioneer manufacturer of thermal insulation materials north of the Yangtze River), Kingflex has built over 40 years of specialized manufacturing capability. Based in Dacheng, China—the globally recognized capital of green building materials—our operations incorporate state-of-the-art automation and strict quality oversight.
We operate 5 large automatic assembly lines, generating an annual capacity exceeding 600,000 cubic meters. This scale allows Kingflex to fulfill high-volume orders for major chemical, petroleum, and municipal projects. Our products are actively exported to 66 countries, establishing Kingflex as a reliable supplier for large-scale international HVAC projects.
We design our products for compatibility with commercial refrigeration line sets, VRF systems, and chiller networks.
Provides structural resistance to thermal transmission and controls surface condensation on cold metal line sets.
Self-extinguishing chemistry meets BS 476 Class 0 and UL94 standards to satisfy strict commercial code requirements.
High elasticity allows easy installation around elbows, joints, and complex runs in VRF loops and chilled water networks.
From building services to chemical engineering, Kingflex materials protect and insulate critical piping systems.
Designed for larger pipes, storage tanks, and ductwork, these sheets provide flexible thermal protection and adapt to custom layout shapes.
Extruded sleeve insulation designed to slip directly onto copper linesets and steel supply headers, preventing condensation and reducing heat gain.
Inside our Dacheng manufacturing complex: continuous extrusion, precision foaming control, and vulcanization lines.








Verifiable delivery communication and feedback from global refrigeration and HVAC engineering contractors.
From raw foam expansion to shipping stages, our quality control tracks every batch of insulation.

















Common questions regarding elastomeric closed-cell insulation for Tubería de Cobre para Refrigeración and commercial HVAC systems.
Select from our range of sheet rolls, color-coded tubes, aluminum-clad boards, and specialized accessories.
Our specialized product variants include corrosion-resistant, high-elasticity, and HVAC-specific closed-cell sleeves, along with fireproof rock wool blankets.
Kingflex Insulation Co., Ltd. coordinates with HVAC engineers and wholesale distributors globally to calculate heat loss profiles and recommend proper insulation sizing for commercial Tubería de Cobre projects.
Our technical team is available to assist you with condensation calculations, fire classification reviews, and custom density requirements.
Our manufacturing site in Dacheng, China, features 5 automated extrusion lines and QA testing laboratories.