Engineered to comply with EU safety protocols and Lombardy’s rigorous commercial refrigeration standards.
In modern industrial and commercial climate control systems, the fluid transfer system acts as the lifeline of heat exchange cycles. As a leading charging hose manufacturer, Ningbo Taojun Refrigeration Equipment Co., Ltd. has spent over 35 years refining the mechanical, chemical, and physical structures of refrigeration charging interfaces. Serving the highly demanding industrial sector of Milan, Italy, we deliver products engineered for ultimate durability, chemical compatibility, and environmental compliance.
Refrigerant gas containment and fluid delivery technology are no longer merely passive mechanical processes. Under the stringent regulations of the European Union, notably the revised F-Gas Directive, containment and system leakage prevention are paramount. This whitepaper details our advanced manufacturing methodologies, local compliance metrics for Northern Italy, material properties, and the global macroeconomic shift toward high-pressure, zero-permeation charging environments.
The Lombardy region, centered on Milan, represents one of Europe's densest concentrations of industrial refrigeration designers, food logistics complexes, and advanced manufacturing plants. Milan’s cold chain supply networks, supermarket infrastructures, and district heating/cooling schemes demand premium diagnostic tools that guarantee zero fluid degradation during system maintenance and charging.
Due to Italy's progressive shift toward natural refrigerants, such as Propane (R290) and Carbon Dioxide (R744/CO2), charging processes must occur at much higher pressures or with stricter environmental isolation barriers. Our charging hoses are rated for high burst threshold resistances, designed to operate safely within these localized Milanese application spaces.
A standard single-layer elastomer tube cannot withstand the chemical complexity of modern synthetics and high-pressure refrigerants. Our high-performance charging hoses feature a three-layer composite structure engineered for high-performance durability:
| Layer Type | Material Compounding | Engineering Function |
|---|---|---|
| Inner Tube | High-Grade Nylon / Neoprene Copolymer | Resists chemical absorption, swelling, and degradation from HFCs, HFOs, and lubricants (POE/PAG). Minimizes refrigerant permeation. |
| Reinforcement | High-Tensile Braided Polyester Yarn / Kevlar Ribbing | Provides structure, stability, and high burst protection. Retains flexibility under operating pressures up to 800 PSI (4000 PSI burst). |
| Outer Cover | Ozone, UV & Abrasion-Resistant Synthetic Nitrile Rubber | Protects the core from mechanical friction, floor abrasion, environmental weathering, and hydraulic oil splashes common in factory environments. |
By using helium leak testing at our facility, we verify that the permeation rates of Taojun charging hoses fall well within the strict European standards (EN 1736). The low permeation coefficient ensures that technicians in Milan can perform gas charging procedures with near-zero atmospheric emissions, satisfying local environmental monitoring bodies.
In addition to manufacturing hoses, Taojun is a comprehensive HVAC/R components specialist. In cold-chain logistics and HVAC maintenance systems, charging hoses do not function in isolation; they are integrated into a system of manifolds, gauges, evacuation pumps, and filters. We engineer complete system interfaces to ensure seamless integration:
Founded in 1988, Ningbo Taojun Refrigeration Equipment Co., Ltd. (originally the Xiangshan Refrigeration Accessories Factory of Zhejiang University) is situated in the scenic tourist hub of Xiangshan, Ningbo. Over more than 30 years of rapid expansion, we have evolved into a comprehensive high-tech enterprise dedicated to the design, production, and distribution of premium refrigeration accessories.
In 2021, Taojun was recognized as a national high-tech enterprise, validating our focus on technological innovation and production refinement. Our brand, including "Lingshan" and "Taojun," is highly regarded in the domestic and global refrigeration markets.
Our facility operates under the ISO 9001:2015 Quality Management System, utilizing advanced MES manufacturing controls and strict quality protocols to serve international HVAC markets, including Italy, Germany, and the wider European region.
A combination of high-tech production, academic partnership, and strict quality control standards.
Our core manufacturing equipment is imported directly from Germany, enabling precision alignment, tight extrusion tolerances, and consistent quality.
Our R&D center is staffed by 15 senior engineers and experts, maintaining collaborative partnerships with researchers from leading Chinese scientific institutions.
We offer customized hose lengths, custom knurled couplings, color-coded identification options, and complete manifold packaging designs.
We source premium materials internationally. Liquid crystal spacers are imported from Japan, and specialty adhesive and compound formulas are sourced from European suppliers.
Hoses and assemblies undergo 500-hour thermal cycling tests (-35°C to 75°C), damp heat aging, and high-voltage breakdown verification.
Our systems carry full CE, RoHS, and UL listings, offering complete peace of mind to European trade distributors and OEM machinery builders.
For 41 years, we have produced copper filter driers and related components. Our technical core consists of high-purity copper processing, robust brazing systems, and rigorous gas pressure containment checks.
We believe a global brand must be built on a foundation of quality and history. Over the decades, Taojun has achieved steady milestones through consistent development and manufacturing investment:
1998 - Original Factory Building
2008 - MES Workshop System
2024 - Modern Production Site
We focus on four core values: Honesty, Innovation, Responsibility, and Cooperation.
Honesty: We adhere to transparent business ethics and quality controls, which serve as the foundation of our long-term customer partnerships.
Innovation: We continuously upgrade our technologies, processes, and management practices to adapt to the evolving demands of the HVAC/R market.
Responsibility: We stand behind the reliability of our products, supporting green initiatives and carbon-reduction regulations.
Cooperation: We collaborate with engineering partners to develop tailored, mutually beneficial fluid transfer solutions.
From domestic cooling circuits to heavy-duty industrial systems in Milan's manufacturing centers.
Ice Machine Desiccant Systems
Industrial Cold Rooms
Commercial HVAC Charging
Chilled Water Loop Connections
Residential AC Fittings
Supermarket Cooling Racks
Automotive A/C Charging
Deep Vacuum Evacuation
Full lifecycle engineering support for global projects.
Ningbo Taojun Refrigeration Equipment Co., Ltd. operates under official GB/T19001-2016/ISO9001:2015 certification (Registration No.: 41325Q00065R0S).
Main Certificate
Detailed Scope
Approved for international distribution and critical industrial applications.
Explore our range of diagnostic, control, and pressure containment products for European HVAC systems.
Supplementary catalog items for system builds, mechanical replacements, and production line supplies.
High-purity desiccant cartridges and valves engineered for industrial air conditioning lines.
Ice Maker & Refrigeration Systems
Corrosion Resistant Lightweight Alloys
High-Capacity Acid & Moisture Adsorption
Answers to common technical questions from HVAC engineers, procurement managers, and mechanical installers in Milan.
Our hoses are engineered with a low-permeation inner nylon core layer that reduces gas diffusion through the elastomer matrix. By keeping permeation rates below the thresholds specified in the EN 1736 standard, our products minimize accidental gas release during connection, diagnosis, and evacuation procedures.
Yes. The inner lining is designed to be chemically inert, resisting degradation from both traditional synthetic refrigerants and newer alternatives. For high-pressure transcritical CO2 systems, we offer reinforced hoses with burst pressure ratings that provide appropriate safety margins for high-pressure operations.
We use multi-point automated hydraulic crimping machines imported from Germany. This ensures uniform compression across the outer sleeve, preventing the hose from pulling away from the brass connector under pressure spikes or thermal contraction.
Yes, we provide full OEM and ODM services. We offer custom hose lengths, various fitting configurations (such as 1/4" SAE, 5/16" SAE, and 1/2" ACME), and integrated ball valves to suit your system requirements.
Our factory uses a 5D quality control system. Raw materials undergo inline moisture extraction and structural verification. Finished assemblies are subjected to high-pressure nitrogen testing, helium leak detection, and high-voltage electrical diagnostics for automated control components.
Contact our technical team today to discuss custom OEM manufacturing, distribution agreements, and bulk wholesale pricing for the Milan market and global shipping.
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