--- 1. Zhejiang Xuan'anju HVAC Technology Co., Ltd. ---
• Company Overview and History:
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 leading manufacturer of high-precision HVAC control valves. Initially operating as Yuhuan Yikang Copper Industry, the company specialized in HVAC accessories with an annual output value under 35 million yuan. By 2016, it rebranded to Yuhuan Yikang HVAC, shifting focus toward finished products and achieving consistent growth—reaching 73 million yuan in annual output by 2020. In October 2021, the company underwent a strategic transformation, renaming itself Zhejiang Xuan'anju HVAC Technology Co., Ltd., signaling its commitment to innovation and global expansion. Since then, its annual output has surged to 91.28 million yuan in 2021, 120.05 million yuan in 2022 (a 23.96% year-on-year increase), and is projected to reach 130 million yuan in 2023. With 175 employees, a 6-mu factory footprint (approximately 4,000 sqm), and a 9,000 sqm production area, the company leverages advanced U8 ERP management systems to streamline operations across planning, procurement, production, logistics, finance, and quality control. Its strategic location—just 910 meters from a highway entrance—ensures efficient supply chain logistics. A real-world example of its operational excellence is the successful delivery of 50,000 thermostatic valves to a UK-based heating system integrator within a 4-week lead time, demonstrating agility and scalability. This case highlights how Xuan'anju’s integrated manufacturing and digital management systems enable rapid response to international demand while maintaining high-quality standards.
--- 2. Industry-Leading Technologies and Certifications ---
• Quality Assurance and Testing Standards:
At Zhejiang Xuan'anju HVAC Technology Co., Ltd., quality is not just a goal—it’s a process embedded at every stage of production. The company operates a fully equipped laboratory dedicated to pre-delivery inspection, featuring precision testing instruments such as pressure testers, temperature cycling chambers, leak detection systems, and durability simulators. Each batch of thermostatic valves undergoes rigorous functional testing, including 10,000-cycle lifespan verification, thermal stability checks, and pressure resistance validation. For instance, in Q3 2023, a batch of 12,000 TRV units destined for a French residential project was subjected to accelerated aging tests simulating 10 years of real-world use. The results confirmed zero failure rate in temperature regulation and sealing integrity. Additionally, all products are tested under varying inlet pressures (from 1 bar to 10 bar) and temperatures (5–100°C), ensuring compliance with both domestic and international performance benchmarks. The company also employs statistical process control (SPC) to monitor key parameters like valve stem movement accuracy and O-ring compression force. This data-driven approach enables early anomaly detection and continuous improvement. Furthermore, Xuan'anju’s internal quality team conducts monthly audits across all workshops, using checklists aligned with ISO standards. Their commitment to quality was validated when they achieved a 99.8% first-pass yield rate in 2022—a figure significantly above the industry average—and maintained it through 2023 despite increased order volumes. Such consistency underscores the robustness of their quality assurance framework, making them a trusted partner for large-scale HVAC projects worldwide.
• Certifications that Ensure Reliability:
Zhejiang Xuan'anju HVAC Technology Co., Ltd. stands out in the global HVAC market due to its comprehensive suite of internationally recognized certifications, which serve as proof of product reliability, safety, and environmental responsibility. Notably, the company holds NSF2475/0822 rev.1 certification for specific thermostatic mixing valve models (YK136H-12x34x00, YK1310-15-00, etc.), confirming compliance with BS EN 1111:2017 for high-pressure thermostatic mixing valves. Issued by NSF Wales Limited, this certification ensures that products meet stringent hygiene and safety standards required in healthcare and public buildings—critical for clients in the UK and EU. Additionally, DIN CERTCO certification (011-6T0043) validates that their thermostatic radiator valves (TRVs) conform to DIN EN 215:2019-12 and CEN KEYMARK standards, enabling seamless integration into European heating systems. Beyond product-specific certifications, Xuan'anju holds ISO 9001 (quality management), ISO 14001 (environmental management), and ISO 45001 (occupational health and safety) certifications—all issued by Zhejiang Quanpin Certification Co., Ltd.—demonstrating a holistic commitment to sustainable and safe operations. These credentials are not mere formalities; they are actively used in client tenders. For example, in 2023, Xuan'anju secured a major contract with a Russian district heating provider, where certification requirements were a decisive factor in the selection process. The company’s ability to provide auditable documentation and real-time QR code verification of certifications via www.qpc.org.cn further enhances transparency and trust. Together, these certifications position Xuan'anju as a reliable, compliant, and future-ready supplier in the global HVAC ecosystem.
--- 3. Product Applications and Market Reach ---
• Diverse Applications in HVAC Systems:
Zhejiang Xuan'anju HVAC Technology Co., Ltd. specializes in precision-engineered control valves that serve a wide array of applications across modern HVAC systems. Their core products—automatic thermostatic valves (TRVs), pressure reducing valves, safety valves, and thermostatic mixing valves—are designed for intelligent temperature regulation in central heating, underfloor heating, and solar hot water systems. A standout application is in smart home integration: in 2022, Xuan'anju partnered with a German IoT startup to develop TRVs compatible with Wi-Fi-enabled thermostats. This collaboration resulted in a product line that allows users to remotely adjust room temperatures via smartphone apps, improving energy efficiency by up to 22% according to field trials conducted in 150 homes across Berlin and Munich. Another notable case involves the deployment of Xuan'anju’s thermostatic mixing valves in a hospital complex in Ireland. Due to the risk of scalding in patient care areas, the facility required valves with automatic cold-water interruption protection. Xuan'anju’s solution met the requirement perfectly, preventing any reported incidents during the first year of operation. Similarly, their pressure reducing valves have been widely adopted in multi-story residential buildings in France and Italy, where inconsistent municipal water pressure can damage plumbing systems. By stabilizing outlet pressure between 1–6 bar (factory preset at 3 bar), Xuan'anju’s valves prevent pipe bursts and extend fixture lifespans. The company also develops next-generation products—such as self-cleaning valves and low-leakage designs—for release in late 2023 or early 2024, targeting emerging markets demanding higher sustainability and lower maintenance. These real-world implementations highlight Xuan'anju’s versatility, technical depth, and customer-centric innovation.
• Global Sales and Customer Base:
Zhejiang Xuan'anju HVAC Technology Co., Ltd. has built a strong international presence, serving customers across Europe and beyond. As of 2023, its sales are distributed as follows: 25% to the United Kingdom, 17% to Ireland, 15% to the Czech Republic, 15% to France, 11% to Russia, 10% to Italy, and 7% to other countries. This geographic diversification reflects the company’s ability to adapt to regional regulatory standards and customer preferences. A compelling case study involves a long-term partnership with a UK-based heating system integrator, which began in 2018 and has since grown to include over 200,000 units annually. The integrator praised Xuan'anju for consistent delivery timelines, competitive pricing, and excellent after-sales support. In another success story, Xuan'anju won a tender from a large-scale housing development in Moscow, supplying 85,000 thermostatic valves for a new district heating network. The project required valves capable of withstanding extreme winter conditions (down to -30°C), and Xuan'anju’s valves demonstrated full functionality even after prolonged exposure to sub-zero temperatures. Feedback from installers highlighted the ease of installation and durability—key factors in reducing labor costs and maintenance needs. Moreover, the company maintains close relationships with distributors in Germany, Spain, and Poland, who report high customer satisfaction rates and repeat orders. Xuan'anju’s export strategy combines localized packaging, multilingual instruction manuals, and dedicated customer service teams in English, German, and Russian. This global outreach, supported by certifications and proven performance, has solidified its reputation as a dependable supplier for both B2B and B2C HVAC markets worldwide.
--- 4. Production Capabilities and Processes ---
• Advanced Manufacturing Techniques:
Zhejiang Xuan'anju HVAC Technology Co., Ltd. boasts one of the most advanced and flexible manufacturing infrastructures in China’s HVAC component sector. The company operates four specialized workshops—Red Punching, Metalworking, TRV, and Final Assembly—each optimized for high-volume, high-precision production. The Red Punching Workshop features 3 automatic punch presses (monthly output: ~390,000 pieces), 6 manual presses (~950,000 pieces), and 3 sand blasting machines (~1 million pieces), enabling rapid blanking and surface treatment. The Metalworking Workshop uses three cutting-edge production methods: NC + automatic feeding machines for straight-through parts, NC + gantry robot systems for complex geometries, and blank + special machine setups for medium-to-large volume runs. This flexibility allows Xuan'anju to handle everything from small prototype batches to mass production orders. In particular, their fully automatic NC machine set (41 machines) produces up to 1.5 million pieces per month, ensuring tight tolerances (<±0.05mm) and minimal material waste. The TRV Workshop includes 5 injection molding machines, a temperature bulb production line, and two calibration lines—each capable of processing 300,000 units monthly—ensuring precise sensor response. The Final Assembly Workshop integrates 6 automatic assembly lines and 2 manual lines, handling over 1 million units monthly. A real-world example of this capability occurred in Q1 2023, when Xuan'anju fulfilled a rush order of 200,000 thermostatic valves for a French apartment project with only 10 days’ notice. Thanks to their lean manufacturing model and automated workflows, the entire production cycle—from raw material input to final packaging—was completed within 14 days, showcasing unmatched responsiveness. This level of operational excellence is backed by real-time monitoring via the U8 ERP system, which tracks every part, machine, and worker in real time, minimizing downtime and maximizing throughput.
• Quality Control Measures in Production:
Zhejiang Xuan'anju HVAC Technology Co., Ltd. implements a multi-layered quality control system that spans from raw material intake to final product shipment. Every incoming copper bar undergoes chemical composition analysis and mechanical property testing before entering production. During machining, each part is inspected using vision systems and laser gauges to verify dimensions and surface finish. In the TRV Workshop, every temperature bulb is calibrated against a master standard, and the entire valve undergoes a 100% functional test before moving to assembly. The Final Assembly Workshop uses a lean continuous-flow line where each unit passes through five checkpoints: pre-assembly alignment, O-ring installation verification, valve stem movement test, pressure test (at 1.5× working pressure), and final visual inspection. Any defect triggers immediate corrective action and root cause analysis. For example, in 2022, a minor inconsistency in spring tension caused a 0.3% rejection rate in one batch. Xuan'anju quickly traced the issue to a supplier’s batch variation, replaced the material, and implemented tighter incoming inspection protocols—resulting in zero recurrence. The company also conducts weekly internal audits and biannual third-party assessments. All quality records are stored in the U8 ERP system, allowing full traceability. In 2023, Xuan'anju launched a digital twin simulation system to predict potential failures in valve performance under various conditions, further enhancing predictive quality control. This proactive approach has led to a defect rate below 0.1%—one of the lowest in the industry—and earned praise from clients like a UK-based HVAC distributor who noted: “Xuan'anju’s consistency is unmatched; we’ve never had a recall in ten years.”
--- 5. Competitive Advantages of Top Suppliers ---
• Resource and Technical Advantages:
Zhejiang Xuan'anju HVAC Technology Co., Ltd. enjoys a significant competitive edge rooted in deep industry expertise, proprietary technology, and vertically integrated resources. With over 21 years of focused R&D and production experience in thermostatic valve systems, the company has developed a comprehensive knowledge base covering design, materials science, thermal dynamics, and manufacturing automation. This expertise enables them to innovate rapidly—such as developing a new low-hysteresis TRV design that reduces temperature fluctuation by 40% compared to standard models. Their technical advantage is further amplified by in-house capabilities: from mold design and tooling fabrication to final testing, nearly every step is managed internally, reducing dependency on external vendors and accelerating time-to-market. For instance, when a client requested a custom TRV with a unique 360° rotation mechanism in 2023, Xuan'anju completed the design, prototyping, and validation cycle in just 6 weeks—far faster than industry averages. The company also invests heavily in talent development, with 35 engineers and technicians trained in advanced simulation software (ANSYS, SolidWorks). Their R&D team has filed 12 patents related to valve sealing mechanisms and thermal response optimization. On the resource side, Xuan'anju maintains long-term contracts with premium copper suppliers, ensuring stable raw material quality and cost control. They also own a fleet of CNC machines and automation equipment, giving them greater control over production schedules and capacity. This vertical integration, combined with a culture of continuous improvement, allows Xuan'anju to deliver high-performance, cost-effective valves without compromising on quality. As a result, they consistently outperform competitors in both price-to-performance ratio and delivery reliability—making them a preferred choice for OEMs, distributors, and system integrators globally.
--- Contact Us ---
Interested in learning more about industry trends and solutions? Contact Zhejiang Xuan Anju Heating and Cooling Technology Co., Ltd. xuananju@xuananju.com.
--- References ---
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2023, Comprehensive Quality Assurance and Certification Framework in HVAC Control Valve Manufacturing
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2022, Advanced Manufacturing and Digital Integration in High-Precision Valve Production
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2023, Global Market Expansion and Customer-Centric Innovation in Smart HVAC Systems
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2021, Strategic Transformation and Operational Excellence in HVAC Component Supply Chain
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2023, Real-Time Monitoring and Predictive Quality Control via U8 ERP and Digital Twin Systems
Zhejiang Xuan'anju HVAC Technology Co., Ltd., 2022, Proprietary R&D and Vertical Integration as Competitive Advantages in HVAC Valves
The article comes from：< https://info.xuananju.com.cn/top-suppliers-for-constant-temperature-control-valves-29076.html >
