Explore our top-tier precision brass fittings, coils, copper tubes, and automation accessories designed for demanding thermodynamic systems.
Ningbo Taojun Refrigeration Equipment Co., Ltd. is located in Xiangshan, Ningbo, a beautiful tourist city. Founded in 1988, its predecessor was Xiangshan Refrigeration Accessories Factory of Zhejiang University. The company's leading products include: filter driers, check valves, air conditioning valves, condensers, brass and copper accessories, air conditioning cable ties and other refrigeration accessories series products.
After 30 years of hard work and rapid development, it has now become a comprehensive enterprise integrating the design and development, production and sales, and after-sales service of refrigeration accessories. In 2021, it became a national high-tech enterprise. Our company is committed to technological and process innovation, equipment improvement, and the introduction of advanced management concepts to produce first-class products. Customer satisfaction is our unwavering pursuit. With reasonable design, reliable quality, and perfect after-sales service, the "Lingshan" filter has become a well-known brand in the domestic refrigeration industry.
The company has successively passed ISO9001:2008 quality management system certification, EU ROHS environmental protection directive certification, and US UL certification. The company always takes customer needs as the basis and continuously innovates management concepts to ensure efficient and stable development.
In 2012, Ningbo Taojun Refrigeration Equipment Co., Ltd. was established, creating the brand "Taojun" condensers, "Taojun" stop valves and other series of products. Over the years, it has established partnerships with well-known domestic and foreign home appliance enterprises such as Haier, Xinfei, Midea, Gree, Whirlpool, Electrolux, and Huarui.
The product sales network covers major and medium-sized cities in China and is exported to Europe, America, South America, Southeast Asia, the Middle East, Africa and other overseas markets. The company's goal is to support and cooperate with every sincere customer to achieve a win-win situation.
1988
15 PhD/Professors
Analyzing the demand for high-reliability brass interconnects in high-pressure refrigeration, water treatment, and industrial fluid systems.
Modern industrial refrigeration and HVAC systems operate under strict thermal variance. Brass tank nipples provide essential mechanical integrity for refrigerant lines, liquid receivers, and accumulator tanks. The alloy prevents fatigue failure induced by rapid pressure shifts.
With the global adoption of natural refrigerants (like CO₂ and Hydrocarbons) and synthetic lubricants (POE oils), chemical stability is non-negotiable. Brass resists chemical attack and limits galvanic corrosion when mated with copper piping and steel receiver shells.
Heavy-duty industrial applications require components certified to survive extreme stress. Our design criteria align with ASME Sec VIII pressure limits, ensuring structural stability under high burst-pressure ratings for liquid and gas containment systems.
Ningbo Taojun engineering team designs tank nipples and refrigeration parts with precise tolerances and premium alloy chemistry.
We offer High-Purity Brass (C36000, HPb59-1, and CW617N) options. Our lead-free or low-lead brass complies with international standard guidelines for mechanical durability and fluid compatibility.
Thread profiles are manufactured to NPT, BSPT, and G-thread standards using imported German CNC machining centers. This guarantees leak-free joints under variable pressures and operating vibrations.
Our proprietary heat treatment and chemical balancing processes result in DZR (Dezincification Resistant) performance, preventing zinc leaching and ensuring durability in harsh water-cooling loops.
Products undergo high and low-temperature cycling (-35°C to 75°C for 500 hours), thermal shock testing, and 100V high-voltage insulation tests for smart controllers to confirm system safety.
How Top Brass Tank Nipples perform in specialized regional industries and extreme operating environments.
Installed directly on pressure tanks, filter driers, and condensers. In systems utilizing modern refrigerants like R134a, R410a, or R600a, brass tank nipples act as secure linkages that prevent refrigerant loss and withstand continuous thermal expansion.
In water treatment facilities and localized commercial boilers, tank nipples are exposed to dissolved oxygen and corrosive minerals. Using DZR-grade brass stops galvanic corrosion and maintains mechanical integrity over years of continuous contact.
Marine air conditioning systems demand high material resistance. The combination of high-purity copper-zinc alloys and precision surface passivation shields our fittings from salt spray pitting, preventing unexpected failures on marine systems.
Ningbo Taojun maintains an integrated supply chain to support bulk orders, precision customization, and prompt global delivery.
Our factory operates in Xiangshan, Ningbo, providing direct access to deep-water shipping lanes and global logistics hubs for faster turnaround times.
We adapt our manufacturing technologies to meet the changing safety, environmental, and performance requirements of international markets.
Refining the processing of silicon-bismuth-brass alloys to comply with safe drinking water and environmental laws without reducing machinability or thread strength.
Integrating inline CCD visual systems to detect micro-cracks and thread deviations under 0.01mm on the production floor, replacing manual quality checks.
Designing heavy-wall thickness nipples and fittings to handle operating pressures up to 140 bar for transcritical carbon dioxide (R744) refrigeration setups.
Verification details for our GB/T19001-2016/ISO9001:2015 quality management system and global safety approvals.
Ningbo Taojun Refrigeration Equipment Co., Ltd. holds GB/T19001-2016/ISO9001:2015 certification (Registration No.: 41325Q00065R0S) for manufacturing filter driers, condensers, and access valves.
This certification, audited by Zhongci International Certification (www.zcgirz.com) and searchable through China's official CNCA database (www.cnca.gov.cn), demonstrates our commitment to consistent quality. We also supply components in compliance with EU ROHS, REACH, and US UL directives.
Quality Certificate
Detailed Scope
We collaborate with home appliance manufacturers and refrigeration providers worldwide, including:
Our products undergo testing to meet the rigorous quality standards and design specifications of these enterprise-level partners.
Over three decades of manufacturing quality, precision development, and international growth.
Building initial fabrication lines and expanding localized production space.
Integrating MES intelligent workshop management and upgrading manufacturing controls.
Transitioning to advanced CNC automation and implementing strict green standards.
Technical information on alloy composition, pressure limits, and custom ordering procedures.
We primarily use HPb59-1 (C36000 equivalent) and CW617N high-purity brass alloys. For high-humidity, marine, or water-contact applications, we provide Dezincification Resistant (DZR) brass. This material prevents zinc leaching, maintaining structural strength and avoiding system clogging in critical cooling loops.
Our automated CNC machines form thread profiles to exact NPT, BSPT, and G-thread specifications. Each production lot is verified with calibrated thread ring gages. Finished parts undergo helium mass spectrometer testing and bubble leak testing to confirm zero-leakage performance under high system pressures.
Our standard Minimum Order Quantity (MOQ) starts at 500 units for stock items, with custom sizes accommodated based on project requirements. In-stock products can ship globally within 72 hours, while custom OEM/ODM production runs average 15 to 30 days depending on component design and order volume.
Yes. With over 30 years of design history linked to Zhejiang University, our R&D department handles custom dimensioning, wall thickness adjustments, and specific thread types. We work with customer drawings or actual parts to develop, test, and manufacture bespoke refrigeration and fluid components.
Browse our complete range of certified copper tubes, filter driers, brazing alloys, and custom adapters.
Taojun
