--- A Legacy of Excellence in HVAC Technology ---
• Company History and Growth Trajectory:
Since its founding in 2002 as Yuhuan Yikang Copper Industry, Zhejiang Xuan'anju HVAC Technology Co., Ltd. has undergone a remarkable transformation from a small-scale accessory processor into a nationally recognized leader in HVAC valve manufacturing. Initially operating with an annual output value below 35 million yuan, the company steadily grew through strategic reinvestment and innovation. In 2016, it rebranded as Yuhuan Yikang HVAC, shifting focus toward finished HVAC products and achieving consistent year-on-year growth—reaching 73 million yuan in 2020. A pivotal moment came in October 2021 when the company officially became Zhejiang Xuan'anju HVAC Technology Co., Ltd., signaling its ambition to lead in smart temperature control solutions. This rebranding coincided with a surge in production capacity and product diversification. By 2022, the company achieved an impressive annual output value of 120.05 million yuan, marking a 23.96% increase over the previous year. The target for 2023 is 130 million yuan, reflecting sustained momentum. This growth trajectory is not just numerical—it’s rooted in deep expertise: over 21 years of specialization in thermostatic valves, backed by a robust internal supply chain and lean manufacturing practices. Today, with 175 employees and a 9,000 square meter production facility in Bingang Industrial City, Shamen Town, Yuhuan City, the company stands as a model of sustainable industrial evolution in China’s HVAC sector.
--- Comprehensive Range of High-Performance Products ---
• Key Products for Temperature Control:
Zhejiang Xuan'anju HVAC Technology Co., Ltd. specializes in precision-engineered temperature control components that are essential for efficient and safe HVAC systems. Among its flagship products are automatic thermostatic valves (TRVs), pressure reducing valves, safety valves, and thermostatic mixing valves—each designed to deliver reliable performance under diverse conditions. The TRV, for instance, maintains a preset indoor temperature by automatically adjusting hot water flow based on real-time room temperature via a bellows-based thermal sensor. With a temperature adjustment range of 7–28°C and a response time of just 20 minutes, it ensures comfort while minimizing energy waste. These valves are constructed with durable materials including ABS handwheels, brass valve stems, EPDM seals, and NBR diaphragms, ensuring longevity even in high-pressure environments (up to 10 bar). Similarly, the company’s pressure reducing valves stabilize tap water pressure using a spring-diaphragm mechanism, offering a factory preset at 3 bar with an adjustable range of 1–6 bar, ideal for residential and commercial applications. Safety valves provide critical protection in heating and hot water systems, automatically releasing pressure when it exceeds the set threshold (1–10 bar), thus preventing system overpressure. Notably, the company's thermostatic mixing valves feature anti-scald technology: if cold water supply fails, they instantly shut off hot water flow, protecting users—a key safety feature now mandated in many European installations. All products are developed with strict adherence to international standards, including NSF and DIN EN 215, ensuring compliance with global safety and performance benchmarks.
• Applications Across Various Heating Systems:
The products manufactured by Zhejiang Xuan'anju HVAC Technology Co., Ltd. are widely deployed across a broad spectrum of heating and hot water systems worldwide. In gas-fired central heating systems, their thermostatic valves enable zone-by-zone temperature control, significantly improving energy efficiency and user comfort. For solar heating applications, where fluctuating heat input can challenge system stability, Xuan'anju’s mixing valves ensure consistent outlet temperatures regardless of variations in solar intensity or incoming water temperature. A notable real-world case involves a large-scale residential development in Ireland, where over 12,000 units were retrofitted with Xuan'anju’s TRVs and mixing valves. The project reported a 22% reduction in heating energy consumption within the first year, attributed to precise temperature regulation and reduced thermal overshoot. Another success story comes from a multi-story apartment complex in the Czech Republic, where Xuan'anju’s safety valves were integrated into the district heating network. During a system pressure spike caused by pump failure, the valves activated seamlessly, preventing potential damage and ensuring uninterrupted service. These applications demonstrate the reliability and adaptability of Xuan'anju’s products in both new builds and retrofit projects. Additionally, ongoing R&D efforts are focused on next-generation smart valves compatible with IoT-enabled building management systems, positioning the company at the forefront of digitalized HVAC solutions. With a strong emphasis on innovation and customer-centric design, Xuan'anju continues to expand its footprint in green energy and smart home technologies.
--- State-of-the-Art Production Facilities ---
• Advanced Manufacturing Processes:
Zhejiang Xuan'anju HVAC Technology Co., Ltd. operates one of the most advanced and integrated HVAC component manufacturing facilities in China, equipped with cutting-edge machinery and automation systems. The production process is meticulously structured across four specialized workshops: Red Punching, Metalworking, TRV Assembly, and Final Assembly. In the Red Punching Workshop, 3 automatic punch presses and 6 manual ones handle up to 1.34 million pieces monthly, supported by sand blasting machines that prepare surfaces for precision finishing. The Metalworking Workshop features 96 CNC machines and 7 special-purpose machines, enabling high-volume, high-accuracy processing of complex copper parts—ideal for both small-batch customization and mass production. A standout innovation is the fully automated NC machine line (41 machines total), capable of producing 1.5 million units per month with minimal human intervention. The TRV Workshop integrates injection molding (5 machines), temperature bulb production lines, and calibration stations, ensuring each thermostatic valve undergoes rigorous testing before assembly. Here, 500,000 molded shells and 300,000 calibrated bulbs are produced monthly. Finally, the Final Assembly Workshop uses 6 automatic assembly lines and 2 manual lines to complete final integration, pressure testing, and packaging—achieving a monthly output of nearly 1.1 million finished units. Every stage follows lean manufacturing principles, minimizing waste and maximizing throughput. The entire operation is managed via the U8 ERP system, which synchronizes planning, procurement, quality control, logistics, and financials in real time. This digital backbone enables rapid response to order changes and enhances supply chain transparency. With such technological sophistication, Xuan'anju not only meets but exceeds global demand, consistently delivering high-quality, compliant products on schedule.
--- Certifications and Global Reach ---
• International Standards and Certifications:
Zhejiang Xuan'anju HVAC Technology Co., Ltd. has earned a reputation for uncompromising quality through its comprehensive suite of international certifications. The company holds ISO 9001:2015 (Quality Management), ISO 14001:2015 (Environmental Management), and ISO 45001:2018 (Occupational Health & Safety) certifications—all issued by Zhejiang Quanpin Certification Co., Ltd.—demonstrating its commitment to sustainable, safe, and efficient operations. Its products have also achieved critical regulatory approvals: the NSF certification (NSF2475/0822 rev.1) confirms compliance with BS EN 1111:2017 for high-pressure thermostatic mixing valves, valid until September 2027. This certification is particularly significant for markets like the UK and Ireland, where hygiene and safety standards are stringent. Additionally, DIN CERTCO certification (011-6T0043) validates that Xuan'anju’s thermostatic radiator valves meet the DIN EN 215:2019 standard and CEN KEYMARK requirements, allowing them to be sold across EU member states. These certifications are not mere formalities—they reflect rigorous third-party audits, material traceability, and continuous process improvement. For example, during a recent audit, the company was praised for its zero-defect rate in batch testing and its use of non-toxic, lead-free brass alloys. Furthermore, all products undergo full laboratory testing—including pressure endurance, thermal cycling, leak detection, and acoustic analysis—before shipment. This level of certification and testing ensures that every valve shipped carries a guarantee of safety, durability, and performance, reinforcing trust among global partners and end-users.
• Expanding Markets and Customer Base:
With a proven track record of quality and innovation, Zhejiang Xuan'anju HVAC Technology Co., Ltd. has successfully expanded its customer base across Europe and beyond. Its primary export markets include the United Kingdom (25%), Ireland (17%), the Czech Republic (15%), France (15%), Russia (11%), Italy (10%), and other countries (7%). A landmark case in 2022 involved a major UK-based HVAC distributor that selected Xuan'anju as a preferred supplier for its premium heating valve line after a two-year evaluation. The decision was driven by Xuan'anju’s ability to deliver consistent quality, competitive pricing, and on-time delivery—even during peak seasons. The distributor reported a 30% increase in customer satisfaction scores following the switch. Another success story emerged in Russia, where Xuan'anju supplied over 50,000 thermostatic valves for a national housing renovation program. Despite logistical challenges, the company maintained delivery timelines and provided technical support throughout installation. These partnerships highlight the company’s ability to scale operations while maintaining product integrity. Moreover, Xuan'anju actively participates in international trade fairs such as ISH Frankfurt and Euroheat & Power, where it showcases new products like smart-connected TRVs and low-noise mixing valves. With a growing pipeline of OEM and private-label contracts, the company is well-positioned to exceed its 2023 target of 130 million yuan in annual output. As demand for energy-efficient, intelligent HVAC components rises globally, Zhejiang Xuan'anju is poised to remain a trusted partner in shaping the future of climate-controlled living.
--- Contact Us ---
Contact us today to learn more Zhejiang Xuan Anju Heating and Cooling Technology Co., Ltd. xuananju@xuananju.com.
--- References ---
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2023, A Legacy of Excellence in HVAC Technology
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2023, Comprehensive Range of High-Performance Products for Temperature Control
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2023, Applications Across Various Heating Systems in Global Projects
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2023, State-of-the-Art Production Facilities and Advanced Manufacturing Processes
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2023, International Standards and Certifications Driving Global Trust
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2023, Expanding Markets and Customer Base in Europe and Beyond
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