Under the global framework of decarbonization and F-gas regulations, HVAC/R systems demand unprecedented integrity in charging equipment.
The rapid transition to eco-friendly but high-pressure refrigerants like R32, R410A, and CO2 (R744) has pushed operating pressures up to 800 PSI, requiring specialized charging hoses with a minimum 4000 PSI burst rating. Low-tier hoses suffer from elastomer deterioration and structural failure under these cyclic pressure loads.
EPA Section 608 and EU F-Gas regulations prohibit venting of fluorocarbon refrigerants. Modern technicians require loss-prevention hoses equipped with ball valves or auto-shutoff fittings to guarantee zero-leak connections during charge and recovery operations.
Synthetic lubricants (POE, PAG oils) used in HFC and HFO systems aggressively degrade traditional nitrile and rubber linings. Leading-edge manufacturers utilize advanced multi-layer nylon permeation barriers to withstand chemical breakdown and moisture ingress.
A high-performance charging hose is not simply an extruded tube; it is a meticulously engineered composite pressure vessel. At Taojun, we design our premium 3-layer charging hoses to meet the strict parameters of SAE J2196 for refrigerant containment and pressure integrity.
Founded in 1988, Ningbo Taojun Refrigeration Equipment Co., Ltd. began its journey as the Xiangshan Refrigeration Accessories Factory under the technical guidance of Zhejiang University. Based in the coastal city of Xiangshan, Ningbo, our facility occupies a key position in China’s industrial manufacturing hub. In 2021, Taojun was recognized as a National High-Tech Enterprise, marking our devotion to continuous engineering innovation.
Over the last 30+ years, we have transitioned from a localized component supplier to a global design and manufacturing powerhouse. Our core product portfolio features robust filter driers, check valves, air conditioning valves, condensers, high-precision brass and copper accessories, and heavy-duty charging hoses. Backed by our state-of-the-art MES intelligent workshop management system, we guarantee consistent quality and reliable OEM/ODM supply chains for major global brands including Haier, Xinfei, Midea, Gree, Whirlpool, Electrolux, and Huarui.
Decades of engineering rigor verified by field performance and international standards.
Different industries demand distinct performance thresholds. We optimize hoses for specific regional and dynamic scenarios.
In highly urbanized residential regions requiring mini-split installs, charging hoses with high flexibility and tight bending radii are critical. Technicians utilize color-coded hoses (Red/Blue/Yellow) with 5/16" SAE fittings for R410A units to rapidly commission split systems without kinks or refrigerant release.
Large-scale commercial VRF systems and water-cooled chillers demand extensive charging hoses. We provide heavy-duty 3/8" or 1/2" high-flow charging hoses with metal reinforcement layers to minimize deep vacuum evacuation times and handle fast bulk charging, reducing system downtime.
Automobile manufacturers and repair shops require hoses tailored for R134a and HFO-1234yf. Our hoses feature quick-connect couplers and ultra-low permeation barriers to prevent expensive modern refrigerant leakage during high-temperature engine bay diagnostics.
How Taojun is positioning itself for next-generation HVAC technologies and eco-refrigerants.
As natural refrigerants like Propane (R290) and Carbon Dioxide (R744) grow in adoption, we are launching hoses engineered for extremely high working pressures (up to 120 bar / 1740 PSI) with chemical composition adjustments that avoid carbonization or dry out.
We are researching smart charging hoses integrated with ultra-thin micro-sensors to read pressure and temperature differentials directly at the manifold connector, transmitting live calibration data via Bluetooth to technical apps.
Aligning with ESG goals, our materials lab is testing renewable plant-derived polymers for the external hose jacket, lowering production carbon footprints by 35% while maintaining UV and grease resistance.
Why sourcing from our Ningbo-based automated factory is a long-term strategic advantage.
Collaborating with tier-1 engineering institutions gives us access to top-tier research in heat transfer and materials science, allowing fast prototyping of custom hose profiles.
Our raw material compounding, hose extrusion, braiding, coupling CNC machining, and final assembly are done entirely in-house. Managed by an integrated MES system, we eliminate sub-tier delay risks.
Our factory is located close to Ningbo Port, the world's busiest container cargo hub. This allows us to offer short container lead times, reduced local transport fees, and continuous ocean shipping connections.
Why leading global refrigeration brands choose us as their long-term partner.
35+ years of refrigeration R&D expertise with direct collaboration with Zhejiang University academic teams.
ISO 9001 and IATF 16949 certified facility utilizing a 5D quality control system to achieve a low 0.05% defect rate.
Active export network covering 50+ countries. Long-term partnerships with Haier, Midea, Gree, Whirlpool, and Electrolux.
Robust OEM/ODM capabilities, accommodating customized sizes, specialized shapes, and flexible wholesale MOQ structures.
Fully compliant with RoHS, REACH, and WEEE directives, utilizing 100% eco-friendly and recyclable industrial packaging.
Equipped with intelligent MES control networks, CCD visual inspection, high-accuracy automatic Helium leak detection systems, and imported German equipment.
No component leaves the Taojun facility without passing our rigorous validation protocols.
Our raw materials undergo strict validation. For polymer composites, high purity is verified. For specialty materials like ITO film, zero-shrinkage and zero-color-difference properties are confirmed; liquid crystal spacers are sourced for uniformity; adhesive compounds are imported directly from leading EU chemical producers to resist thermal aging up to 90°C.
Hoses, valves, and filter driers are subjected to intensive high & low-temperature thermal cycling testing from -35°C up to 75°C for 500 hours continuously. Thermal shock tests alternate from 10°C to 90°C within 30 minutes to replicate heavy field usage. Moisture is removed by high-temperature vacuum drying ovens.
Electronic and functional refrigeration parts undergo 24-hour non-stop power aging tests. Liquid crystal sheet components are subjected to high-voltage tests at 100V to ensure zero dielectric breakdown, preventing electrical failures in harsh HVAC environments.
Certified GB/T19001-2016 / ISO9001:2015 for precision design and manufacturing.
ISO9001 Quality System Certificate
Scope of Certified Manufacturing
National High-Tech Enterprise
Our credentials can be verified directly on China's National Certification and Accreditation Administration website (www.cnca.gov.cn) or via our certification partner (www.zcgirz.com) using Registration Number 41325Q00065R0S.
We provide a dedicated technical workflow to ensure hassle-free global component sourcing.
Connect with our expert sales engineers boasting over 15 years of fluid dynamics and refrigeration system design experience. We offer rapid application assessments, technical drawings, and coordinate 8-hour response windows for custom requests.
We provide full documentation, physical testing guidelines, and diagnostic procedures for HVAC assembly lines. Taojun engineers help optimize your charging connections for faster cycle times and minimal wear.
We stand behind our products with a 1-year comprehensive factory warranty. We offer free lifetime engineering consultations, spare parts availability, and a 24-hour complaint resolution loop to ensure your assembly line is always running.
Technical clarifications on charging hose design, compound selection, and bulk OEM shipping.
Most field leaks occur due to polymer deterioration from POE/PAG oils, or fitting separation at the crimped joint. Taojun prevents these issues by using a high-density, multi-layer nylon liner that resists oil absorption, along with automated crimping machines that apply uniform radial pressure on the brass sleeve, preventing cold-flow deformation of the rubber.
Yes. Our premium 3-layer charging hoses feature an 800 PSI working pressure rating and a 4000 PSI burst pressure limit, providing a 5:1 safety factor. They are designed for high-pressure refrigerants, including R410A, R32, and R22.
We offer full customization of hose lengths (from 3 feet up to bulk reels), connector sizes (1/4", 5/16", 1/2" SAE), connector angles (straight, 45-degree, 90-degree), shut-off options (standard, ball valves, low-loss fittings), and customized branding or color patterns.
Every single batch of charging hoses undergoes burst pressure validation, vacuum retention verification, and flexural fatigue testing in our ISO 9001 certified laboratory. We also use high-sensitivity Helium leak mass spectrometers to verify zero-leak performance on critical components.
Standard OEM custom configurations take 15 to 25 days depending on material specifications. Since our factory is located near Ningbo Port, we can streamline port operations and achieve delivery in under 72 hours for pre-scheduled batches.
Taojun
