Premium OEM/ODM refrigeration and thermodynamic tubing components manufactured to tight metallurgical tolerances.
Modern thermodynamics demands structural systems capable of withstanding massive pressure cycles while retaining excellent thermal conductivity. Bundy tubes—traditionally fabricated as double-walled, copper-brazed steel tubing—represent a critical milestone in mechanical fluid engineering. In contrast to standard single-walled tubes, the manufacturing mechanics behind a double-walled Bundy tube ensure high structural integrity and fatigue limit, making them perfect for applications prone to extreme vibration and high-pressure differentials.
As the HVAC/R sector accelerates its transition to eco-friendly refrigerants like R290 (Propane), CO2 (R744), and R32, processing lines require components designed for elevated operating burst limits. We supply high-precision low-carbon steel alloy Bundy tubes lined with dynamic surface treatments like zinc plating, PVF, or epoxy coatings to survive aggressive atmospheric oxidation and micro-galvanic corrosion.
Our advanced production facilities merge raw material science with state-of-the-art tooling to manufacture high-yield structural tubing and complex evaporator/condenser loops. We address complex industrial challenges, providing customized components tailored to EV battery cooling plates, heavy-duty commercial display units, and residential heat pump systems.
Founded in 1988, the predecessor of our corporate body was the Xiangshan Refrigeration Accessories Factory of Zhejiang University. Over the past 38 years, our operational model has transformed from a regional design workshop into a high-capacity manufacturing powerhouse. Today, Taojun represents a comprehensive enterprise integrating technology research and development, smart manufacturing, global export sales, and end-to-end technical support services.
In 2021, the company officially secured status as a National High-Tech Enterprise, acknowledging our investments in robotic assembly and engineering refinement. Our flagship solutions, marketed under the highly respected domestic brand "Lingshan" and internationally under "Taojun", encompass custom copper/steel filter driers, check valves, AC charging safety valves, robust wire-on-tube condensers, and customized brass connection components. Customer satisfaction is our unwavering pursuit. With reasonable design, reliable quality, and perfect after-sales service, we work to build long-term value for our clients.
A granular look at the materials, chemistry, and precision processing behind Taojun's thermodynamic solutions.
Manufactured by continuous roll forming of premium low-carbon steel strip, followed by 360-degree copper brazing in a reducing atmosphere. Features high burst resistance and structural durability under continuous dynamic vibrations.
Our copper filter driers feature high-purity 3A molecular sieves coupled with integrated carbon-layer filters. They absorb moisture and acid while capturing particulates to prevent capillary line freezing and compressor breakdown.
Argon-arc welding lines deliver leak-free hermetic seals. We provide various surface options, including multi-layer zinc galvanization, PVF topcoats, and specialized chrome-free passivation treatments to withstand harsh environmental conditions.
How Taojun's specialized refrigeration components solve thermal system challenges on a global scale.
The thermodynamic demands of refrigeration hardware differ drastically by geography and industry:
With 15 highly qualified engineers in our research center—including doctors and professors from the University of Science and Technology of China (USTC)—Taojun specializes in developing custom products for demanding applications.
Ningbo Taojun Refrigeration Equipment Co., Ltd. operates under strict quality management structures. Our certified GB/T19001-2016/ISO9001:2015 framework (Registration No.: 41325Q00065R0S) guides every production phase. The validity and scope of our quality management credentials are publicly verifiable via the National Certification and Accreditation Administration of China (CNCA) portal.
Beyond basic system certifications, our manufacturing lines incorporate specialized testing equipment imported directly from Germany. Raw materials, including liquid crystal spacer elements and high-performance ITO films, are sourced globally from trusted partners in Japan and Europe to guarantee stable operating profiles.
Our laboratory runs comprehensive physical testing profiles: high and low-temperature stress tests (ranging from 75°C to -35°C for 500 consecutive hours), thermal shock trials, damp heat cycles, and dry-oven moisture elimination. Completed components are subjected to Helium leak testing and automated CCD camera inspections.
ISO 9001 Certificate
Certification Scope
RoHS Certificate
UL Standard Approval
CE Declaration
REACH Compliance
A legacy of innovation shaping the future of global refrigeration component manufacturing.
Our company's history is built on persistent technological innovation. Since our establishment in 1988, we have continually upgraded our production capabilities:
1998 Factory Building
2008 MES Implementation
2024 Smart Facility
Building a globally recognized brand requires a strong, shared corporate culture. At Taojun, our operational practices are guided by four core values: Honesty, Innovation, Responsibility, and Cooperation.
Honesty: We adhere to transparent business practices, prioritizing quality and corporate integrity as the core of our competitive advantage.
Innovation: Technical innovation drives our strategic growth. We continuously update our manufacturing processes, equipment, and management methods to meet changing market demands.
Responsibility: We maintain a strong sense of responsibility toward our global clients and partners, ensuring consistent quality across all product lines.
Cooperation: We collaborate closely with partners worldwide to achieve mutual growth, integrating resources to let specialized teams focus on what they do best.
End-to-end technical assistance and manufacturing support for partners worldwide.
- Detailed project review and analysis by experienced application engineers.
- Rapid prototyping and technical drawing validation.
- Technical support available within 8 hours.
- Adaptable tooling for custom geometries and dimensions.
- Multi-stage quality gates and raw material traceability.
- Low MOQ (500 units) to support new product development.
- 1-year product warranty with root-cause analysis support.
- Continuous engineering feedback loops.
- Rapid shipping options to minimize supply chain disruptions.
Expert answers to common questions about our products, manufacturing standards, and supply chain capabilities.
Premium OEM/ODM refrigeration and thermodynamic tubing components manufactured to tight metallurgical tolerances.
Taojun
