Yongda
Yongda
Engineered for maximum reliability and absolute hydraulic safety. Explore our primary system accessories and certified components.
In modern industrial, commercial, and municipal fluid dynamic networks, the integrity of clean water supplies is non-negotiable. Backflow prevention valves stand as the primary safeguard against cross-connection contamination, preventing non-potable substances, chemicals, or greywater from siphoning back into public drinking water infrastructures. As urbanization accelerates and environmental standards tighten worldwide, selecting high-quality check valves, mixing shunts, and multi-port systems is paramount for mechanical contractors and design engineers.
Backflow typically occurs through two distinct hydraulic behaviors: backpressure and backsiphonage. Backpressure is triggered when the downstream pressure exceeds the supply pressure, often caused by pumps, elevation changes, or thermal expansion in heating circuits. Backsiphonage occurs when there is a negative pressure drop in the supply system—often due to nearby water main breaks or high-demand firefighting events—effectively drawing contaminated fluids backward. High-grade back flow valves mitigate these risks through multi-layered spring checks and air release mechanisms, responding instantly to structural pressure imbalances.
The global demand for commercial backflow preventers, high-performance manifolds, and HVAC fluid control hardware is experiencing steady growth. Strict regulatory frameworks, such as the EPA's Safe Drinking Water Act in North America and EN 1717 standards in Europe, mandate verified prevention systems at every water service connection. Key markets like North America, Northern Europe, and the Asia-Pacific region are seeing rapid upgrades in municipal water networks and commercial construction, driving the need for durable, certified brass and stainless steel assemblies.
Furthermore, the growth of smart commercial buildings requires valves that interface directly with Building Management Systems (BMS). Today's engineering teams do not merely buy mechanical valves; they source system solutions that integrate temperature monitoring, automatic air relief, and pressure-balanced bypass systems. Consequently, manufacturers must innovate across both mechanical and electrical control topologies.
Located in Zhejiang Province, Yuhuan is globally renowned as the "Valve Capital of China". The region hosts a fully integrated industrial cluster featuring raw material refining, mold making, high-speed hot forging, precision CNC machining, and automated quality testing. This geographic synergy allows manufacturers to achieve unparalleled cost efficiency and rapid prototyping without sacrificing metallurgical quality.
At Yuhuan Yongda Fluid Control Co., Ltd., we capitalize on these cluster advantages to run an optimized, high-output production cycle. Across our 45,000+ square meter facility (with a usable footprint exceeding 80,000 square meters), our manufacturing pipelines run on advanced, dedicated machine tools. This structural efficiency translates directly to shorter lead times, lower unit costs, and strict compliance with global standards, making us a preferred partner for global OEMs and distribution brands.
Our comprehensive valve portfolio is deployed in diverse local plumbing environments across the globe:
The plumbing and HVAC industries are pivoting towards sustainability and smart monitoring. The transition to lead-free brass (e.g., CW617N, DZR brasses, and Low-Lead alloys) is a critical compliance target globally. Yongda prioritizes environmental health, using alloys that meet stringent global heavy metal limits. Additionally, smart thermostats and IoT-ready control valves are replacing traditional mechanical components, allowing operators to monitor water usage, detect leaks, and adjust temperatures remotely.
A heritage of manufacturing excellence and strict quality standards spanning nearly three decades.
Yuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) was founded in 1996 in Yuhuan, Zhejiang. As a specialized plumbing valve manufacturer, we oversee the entire life cycle of our products, from concept design and mechanical engineering to high-volume production, surface finish processing, and international distribution.
Our catalog is organized into three major categories: brass valves, brass pipe fittings, and high-efficiency HVAC products. Positioned in the mid-to-high grade segment, our products place a premium on environmental compatibility and longevity, earning the trust of distributors and mechanical contractors across North America, Europe, and Asia.
With an actual operational footprint of 80,000 square meters, our plant features over 600 sets of automated production and testing machinery, including 80+ specialized CNC machine tools. This mechanical capability allows us to satisfy diverse specifications, delivering tailored fluid control solutions to clients in over 20 countries.
Under our dedicated brand, Cokaren, we aim to design products with elegant profiles, premium surface finishes, and excellent operational reliability. True to Cokaren's brand promise, "keep flowing, keep warming", we strive to engineer components that bring lasting safety and comfort to homes and businesses worldwide.
Our quality control workflow is guided by a simple policy: "Fine work, no leakage." We operate under a robust ISO framework, certified for ISO9001:2015 Quality Management Systems, ISO14001:2015 Environmental Management Systems, and ISO45001:2018 Occupational Health and Safety Management Systems. We are committed to fostering a workplace that aligns our corporate growth with the well-being and development of our workforce.
Integrating filtration, temperature modulation, and pressure regulation in radiant water systems.
Our corporate culture is built on four core values: Struggle, Enterprising, Pragmatic, and Innovative. By prioritizing customer needs and maintaining a strict focus on quality, we design and manufacture fluid control systems that offer reliable performance in demanding operating environments.
Our engineering approach is simple: create systems where every valve, fitting, and manifold functions in harmony. Our products undergo rigorous pressure, fatigue, and material composition testing, helping to prevent leaks, drop-offs, and premature corrosion in piping systems.
To supply global projects, our manufacturing practices are aligned with international quality benchmarks. Our production facility is certified under ISO 9001:2015 for quality management, ISO 14001:2015 for environmental responsibility, and ISO 45001:2018 for occupational health and safety.
We work closely with international testing labs to ensure our brass compositions, structural pressure ratings, and sealing materials meet or exceed local plumbing and heating requirements in North America, Europe, and beyond.
Explore our integrated energy distribution components, engineered to optimize heat transfer and fluid safety.
The first line of defense in domestic water sanitation, filtering up to 98% of sediment and particulates in supply lines.
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Controls hot and cold water distribution in boiler circuits, featuring a durable brass spherical spool.
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Automatically releases accumulated air in heat pump and water heating systems to maintain stable flow.
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Blends hot and cold water flows, stabilizing system temperatures and protecting subfloor pipe networks.
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Interfaces with zone valves and manifolds, enabling precise temperature control across heating zones.
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Filters system debris, controls sub-manifold lines, and monitors temperature and fluid pressure.
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Distributes flow to radiant loops, coordinating with zoning actuators to balance indoor comfort.
Learn More & SpecsPrecision-engineered brass manifolds, ball valves, and custom fittings built for long-term operational safety.
Integrates an internal strainer screen, offering double duty as a shut-off valve and inline debris filter.
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Allows for manual or thermostatic temperature adjustment to keep flow temperatures within target limits.
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Blends return water with primary hot supply loops, preventing thermal stress on piping systems.
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Engineered multi-port manifold bodies for hydronic radiant heating systems, featuring fine flow regulation.
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Durable exterior hose bibcock, designed with corrosion-resistant brass to withstand outdoor elements.
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Full-port flow control gate valves, built for minimal pressure drop in residential and industrial networks.
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Precision-machined brass connector tubes, ensuring secure connections for utility water meters.
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Machined hose barb connections, complying with American thread specifications for industrial lines.
Product SpecificationsTechnical answers to common engineering, installation, and procurement questions.
A Double Check Valve (DCV) uses two spring-loaded check valves in series to prevent backflow. It is typical for low-to-medium risk cross-connections. A Reduced Pressure Zone (RPZ) assembly adds a hydraulically controlled relief valve between the check valves. If either check valve fails or a pressure imbalance occurs, the relief valve opens to discharge water, preventing backflow. RPZ assemblies are required for high-hazard cross-connections.
Global health standards, such as NSF/ANSI 372 in the US and equivalent European directives, restrict lead levels in drinking water system components to a weighted average of 0.25% or less. Using lead-free brass alloys prevents lead from leaching into potable water lines, protecting public health and meeting municipal codes.
A mixing shunt blends high-temperature supply water from a boiler or heat pump with cooler return water from underfloor loops. This temperature control helps protect underfloor piping from excessive heat, stabilizes subfloor warmth, and reduces energy consumption by cycling thermal energy within the hydronic loops.
Our quality policy is "Fine work, no leakage." Every valve undergoes 100% pneumatic and hydrostatic pressure testing to verify seal integrity. We also run material spectrometer testing on brass melts to confirm alloy composition, and carry out mechanical stress cycling to evaluate structural durability before shipping.
Yes. With our in-house engineering team and tool fabrication facility, we offer full OEM/ODM services. We can customize thread types (NPT, BSP, G), dimensions, pressure ratings, handle styles, and brass alloys to match your specific engineering drawings and target market standards.
Reliable connections, valves, and control systems for light commercial and residential plumbing projects.
