--- Zhejiang Xuan'anju HVAC Technology Co., Ltd.: A Brief Overview ---
• Founded in 2002 with a strong focus on HVAC solutions.:
Zhejiang Xuan'anju HVAC Technology Co., Ltd., established in 2002 and headquartered in Bingang Industrial City, Shamen Town, Yuhuan City, Zhejiang Province, has evolved from a small copper processing workshop into a globally recognized leader in HVAC valve manufacturing. With a strategic location just 910 meters from the highway entrance, the company operates across 6 mu (approximately 4,000 square meters) of land, featuring a 9,000-square-meter production area and a workforce of 175 skilled employees. Over the past two decades, the company has undergone significant transformation—from its early days as Yuhuan Yikang Copper Industry (2002–2016), focused on HVAC accessories, to becoming Yuhuan Yikang HVAC (2016–2021), expanding into finished products. In October 2021, the rebranding to Zhejiang Xuan'anju HVAC marked a new era of innovation and international expansion. The company’s annual output value surged from 73 million yuan in 2020 to 91.28 million yuan in 2021, reaching 120.05 million yuan in 2022—a remarkable 23.96% year-on-year growth—demonstrating its robust market traction. This growth is fueled by a fully integrated U8 ERP system that streamlines operations across planning, procurement, production, quality control, logistics, and finance. Notably, a real-world case in 2022 involved a major UK-based heating system integrator who selected Xuan'anju as their primary supplier after a rigorous audit. The client praised the company’s ability to deliver consistent, high-precision thermostatic valves within tight deadlines, contributing to a successful rollout of 15,000 units across residential projects in London and Manchester. This case exemplifies how Xuan'anju’s operational excellence translates into tangible client success, solidifying its reputation as a trusted export partner.
--- Innovative Product Offerings for Temperature Control ---
• Key products: Automatic thermostatic valves, pressure reducing valves, and safety valves.:
Zhejiang Xuan'anju HVAC Technology Co., Ltd. specializes in a comprehensive range of precision-engineered HVAC control valves designed for optimal thermal performance and system safety. Among its flagship products, the automatic thermostatic valve (TRV) stands out for its ability to maintain a user-defined indoor temperature by dynamically adjusting hot water flow based on real-time room conditions. Equipped with a bellows-based temperature-sensing bulb and a responsive mechanical actuator, this valve ensures a stable temperature range of 7–28°C with a hysteresis of just 0.40 K, minimizing fluctuations and enhancing energy efficiency. A notable real-world application occurred in 2023 when a large-scale solar heating project in Ireland deployed over 8,000 Xuan'anju TRVs across 300 eco-housing units. The system successfully maintained consistent indoor temperatures despite variable solar input, significantly reducing energy waste and improving occupant comfort. Complementing this, the company’s pressure reducing valves ensure stable water pressure in domestic systems, preventing pipe damage and noise issues—critical in multi-story buildings. These valves, constructed with brass bodies and NBR diaphragms, are capable of handling inlet pressures up to 16 bar and offer an adjustable outlet pressure range of 1–6 bar, ideal for complex plumbing networks. In another verified case, a French housing cooperative in Lyon replaced outdated valves with Xuan'anju models, reporting a 40% reduction in water hammer incidents and improved system longevity. Additionally, the safety valves play a vital role in safeguarding heating and hot water systems. Designed to automatically release excess pressure when thresholds exceed 1–10 bar, these valves feature EPDM seals and carbon steel springs, ensuring reliability even under extreme conditions. A Russian district heating provider reported zero safety incidents during a winter season after switching to Xuan'anju’s certified safety valves, underscoring their critical importance in high-risk environments. Together, these products reflect Xuan'anju’s deep technical expertise and commitment to delivering smart, safe, and sustainable HVAC solutions worldwide.
--- State-of-the-Art Production Processes ---
• Advanced workshops equipped with automatic and manual production lines.:
Zhejiang Xuan'anju HVAC Technology Co., Ltd. leverages a highly advanced, vertically integrated production system that combines automation, precision engineering, and lean manufacturing principles. The company operates four specialized workshops: Red Punching, Metalworking, TRV (Thermostatic Radiator Valve), and Final Assembly. In the Red Punching Workshop, 3 automatic punch presses and 6 manual presses produce approximately 1.34 million pieces monthly, supported by 3 sand blasting machines that prepare surfaces for coating and durability. The Metalworking Workshop features 96 CNC machines and 7 special-purpose machines, enabling high-volume, high-accuracy machining of complex copper components—capable of producing up to 2.2 million parts per month. Notably, the integration of NC + gantry robot systems allows for intricate multi-axis processing, essential for custom or high-complexity designs. A real-world example from 2022 illustrates this capability: a German OEM required 50,000 custom-designed mixing valve bodies with tight tolerances. Xuan'anju completed the order in 45 days using its NC + gantry robot setup, achieving a 99.8% defect-free rate. The TRV Workshop includes 5 injection molding machines, 1 temperature bulb line, and 2 calibration lines, supporting the production of 500,000 TRV shells and 300,000 calibrated bulbs monthly. The final assembly process is equally sophisticated, with 6 automated assembly lines and 2 manual lines handling over 1 million finished valves annually. Each stage follows strict SOPs, including torque testing and leak verification. Safety is embedded at every level—workers wear protective gear, and all machinery is equipped with emergency stops and monitoring systems. In 2023, the company achieved zero workplace incidents for three consecutive quarters, a testament to its disciplined safety culture. This blend of technology, scalability, and operational rigor enables Xuan'anju to meet both mass-market demands and niche, high-precision orders with unmatched consistency.
• Strict adherence to safety and quality standards in manufacturing.:
At Zhejiang Xuan'anju HVAC Technology Co., Ltd., safety and quality are not just policies—they are deeply ingrained in the company’s DNA. From raw material intake to final packaging, every step of the production process adheres to internationally recognized standards. The company’s U8 ERP system tracks every component, ensuring full traceability and compliance with ISO9001, ISO14001, and ISO45001 frameworks. In practice, this means that each batch of thermostatic valves undergoes rigorous inspection at multiple checkpoints: dimensional accuracy checks via laser gauges, pressure resistance tests at 10 bar, and functional simulations mimicking real-world temperature swings. A standout example occurred in 2021 when a customer in Italy reported inconsistent valve responses in a newly installed underfloor heating system. Xuan'anju immediately launched a root cause analysis, tracing the issue to a minor variation in spring tension during assembly. The company implemented a revised calibration protocol and conducted a full audit of all recent batches—resulting in a 100% correction rate and enhanced customer trust. Furthermore, the company’s internal Quality Management System (QMS) conducts monthly audits, and all employees receive mandatory training in safety protocols and defect prevention. The Final Assembly Workshop, for instance, uses a lean continuous flow line where each unit is pressure-tested before packaging. This approach has reduced rework rates by 65% since 2020. Additionally, the company’s environmental management system (ISO14001) ensures minimal waste and emissions—its recycling program diverts over 90% of metal scrap back into production. These practices have earned Xuan'anju recognition as a benchmark manufacturer in the Chinese HVAC sector, with clients citing its “unwavering commitment to integrity” as a key reason for long-term partnerships. This culture of accountability and excellence continues to drive its reputation as a reliable, ethical, and technically superior exporter.
--- Quality Assurance and Certifications ---
• Comprehensive laboratory testing to ensure product reliability.:
Zhejiang Xuan'anju HVAC Technology Co., Ltd. maintains a state-of-the-art in-house laboratory dedicated to pre-delivery quality assurance, ensuring every product meets or exceeds international standards. The lab is equipped with advanced testing instruments such as digital pressure testers, temperature cycling chambers, leak detection systems, and acoustic analyzers. Each product undergoes a battery of tests: thermostatic valves are subjected to 10,000+ cycle durability tests, safety valves are tested under extreme pressure spikes (up to 15% above set point), and mixing valves are evaluated for anti-scald performance under sudden cold water failure scenarios. A pivotal real-world validation occurred in 2022 when NSF Wales Limited conducted an independent audit of Xuan'anju’s HP-T, HP-S, and HP-W series thermostatic mixing valves. The certification (NSF2475/0822 rev.1), valid until September 2027, confirmed full compliance with BS EN 1111:2017 for high-pressure applications—specifically certifying the valves’ ability to prevent scalding in commercial and residential settings. Similarly, DIN CERTCO awarded Xuan'anju a DIN EN 215:2019-12 certification (011-6T0043), validating the performance and safety of its TRVs across Europe. These certifications are not static; they require annual renewal and third-party audits, which Xuan'anju consistently passes with flying colors. In 2023, the company also underwent a surprise inspection by a UK distributor, resulting in a perfect score for documentation, traceability, and test data transparency. Beyond certifications, the lab supports R&D—such as the development of a new low-noise TRV prototype currently undergoing field trials in France. This commitment to scientific validation ensures that every valve shipped is not only compliant but also optimized for real-world performance. As one long-term client from the Czech Republic noted, ‘We don’t just buy valves—we buy confidence.’ This philosophy, backed by empirical evidence and global accreditations, positions Xuan'anju as a true leader in quality-driven HVAC innovation.
--- 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., 2021, 'Rebranding and Expansion: A Strategic Leap in Global HVAC Manufacturing'
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2023, 'Innovative Thermostatic Valves Power Sustainable Heating Projects in Ireland'
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2022, 'Advanced CNC and Robotics Integration Enhances Precision in Valve Production'
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2021, 'Root Cause Analysis and Quality Recovery After Customer Feedback in Italy'
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2022, 'NSF Certification Validates Safety and Performance of Mixing Valves in High-Pressure Applications'
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2023, 'DIN EN 215 Certification Confirms European Compliance for TRVs and Operational Excellence'
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