Yongda
Yongda
Discover our primary selection of high-performance thermal actuators, control valves, and brass fittings manufactured to meet exact global standards.
Originally established as Yuhuan Yongda Plumbing Co., Ltd., we have spent nearly three decades refining our craft within "China's Valve Capital"—Yuhuan, Zhejiang. As a premier fluid control enterprise, our capabilities bridge the gap between initial mechanical concept design, state-of-the-art laboratory testing, high-volume production, and international logistics execution.
Our comprehensive production system is structured into three specialized divisions: high-grade brass valves, high-tolerance tube fittings, and advanced HVAC distribution assemblies. Engineered specifically for mid-to-high-end applications, our valves prioritize environmental safety, leak-proof longevity, and hydraulic efficiency. Today, we are trusted partner for leading distributors, OEMs, and mechanical contractors across North America, Europe, and Asia.
The progression of pressure regulation from static mechanical boundaries to dynamic, feedback-integrated smart distribution systems.
By employing CW602N, CW617N, and eco-friendly lead-free brass formulations, our pressure limiting valves prevent selective leaching in aggressive water conditions, sustaining tight tensile parameters and protecting system purity.
Our design roadmap leverages advanced piston systems with low hysteresis elastomer seals. This architecture manages sudden pressure transients (water hammer) with quicker damping rates than traditional membrane structures, minimizing down-stream equipment damage.
The future of thermal actuator and flow valve systems is digital. Cokaren is piloting smart pressure-limiting modules integrated with micro-actuators that feed differential pressure data back to localized building management systems (BMS) for real-time optimization.
How our components integrate into heavy municipal, multi-family residential, and commercial HVAC networks.
Multi-loop manifolds require strict hydraulic balance to prevent thermal stratification. Our bypass assemblies, thermal actuators, and manifold end units ensure static water volume is distributed evenly, reducing thermal stresses and lowering pump electricity consumption by up to 22%.
Unchecked gravity water flow in vertical risers generates destructive pressure zones at lower levels. Cokaren's brass pressure reducing and stop valves balance structural zones, ensuring stable delivery pressures at tap endpoints without risk of cavitation.
Closed-loop hydronic heating systems rely on precise expansion and pressure venting. Our integrated boiler venting and safety relief valves exhaust built-up air and micro-bubbles, protecting boiler heat exchangers from dry-firing and oxygen-induced oxidation.
Water meters and filtration systems are highly vulnerable to main line pressure shocks. Placing our compact piston-stabilized limit valves at entry points reduces dynamic friction losses, prevents water leakage, and extends the functional life of domestic home appliances.
Operating a production center with an actual usable footprint of 80,000 square meters, our facility is engineered around efficiency and rigorous quality controls. With more than 600 sets of advanced metal-forming, machining, and inspection tools, including 80+ high-precision specialized CNC machine centers, we maintain total control over dimensional tolerances down to the micrometer scale.
Our lean manufacturing approach guarantees structural consistency from raw brass rod extrusion to final assembly pressure testing. By automating repetitive forging operations, we stabilize physical output characteristics while mitigating structural defects. In an era of unpredictable supply chain delays, our extensive vertical integration—encompassing tool design, casting, machining, surface finishing, and assembly—guarantees stable lead times and transparent cost control.
A unified hydraulic loop requires coordinated control. Our components work in harmony to control temperatures, filter out impurities, regulate manifold loops, and safeguard system structural integrity.
The first line of defense in domestic water sanitation, can filter 98% of impurities in the pipeline.
Used to control the inflow and outflow of cold water and hot water in the boiler, with Spherical spool.
Used to discharge excess air in the air source water heater to ensure stable operation of the equipment.
Used to mix cold and hot water in pipes, stabilizing temperature, protect pipeline.
Combine all the equipment to adjust the room temperature.
Used to filter and discharge impurities in the pipeline, control the switch of the back-end manifold, measure temperature and water pressure.
Cokaren represents our new premium brand initiative. It was built specifically to address the evolving market demands for enhanced aesthetics, tighter manufacturing clearances, and world-class customer service. As fluid systems become more compact and architecturally exposed, product finish and tactile feel become just as critical as internal pressure tolerances.
Guided by our brand promise, "Keep flowing, keep warming," Cokaren accessories integrate seamlessly into modern residential spaces. By investing heavily in surface treatment research, we ensure our brass castings look clean, resist tarnish, and perform consistently under high-temperature demands. Our long-term mission is to establish Cokaren as a global standard for luxury and mid-market hydronic system controls.
Why leading global distributors choose our certified industrial products.
Securing key industrial supply networks requires high standard quality validation. Our company has established and verified comprehensive management structures that comply with international norms:
Our quality pledge, "Fine work, no leakage," serves as the cornerstone of our manufacturing philosophy. Each production run is subjected to hydraulic testing under operational pressure thresholds, ensuring zero field failures upon installation.
Continuous drive to improve process efficiencies.
Entering new international markets.
Realistic problem solving & customer care.
Iterative engineering & smart flow R&D.
Practical answers to key engineering, installation, and procurement questions regarding pressure control valves.
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