Yongda
Yongda
Explore our leading collection of CE certified full port valves, manifolds, and high-efficiency HVAC control units.
In modern industrial and commercial piping systems, selecting flow control elements plays a vital role in determining thermal efficiency, operating pressures, and energy costs. The Full Port Valve (also known as a full bore valve) stands out as the premium design standard. Unlike standard port valves which restrict flow via a reduced bore, full port valves feature a ball with an internal diameter equivalent to the pipe's nominal size. This eliminates flow restriction, keeping fluid resistance to an absolute minimum.
From an engineering perspective, this matches the pipeline's native hydraulic properties. Minimizing turbulence and eliminating pressure drops ($\Delta P$) prevents cavitation, protects system pumps, and enhances heat transfer coefficients across complex hydronic manifolds and heat exchangers. In critical district heating networks, industrial water distribution systems, and HVAC configurations, full port brass valves ensure maximum reliability and lower energy consumption.
Underfloor heating, hydronic balancing, and smart temperature zoning systems demand components that withstand continuous heat cycles and maintain stable flow profiles. Standard flow valves introduce friction losses, forcing recirculating pumps to work harder and consume more electricity. By utilizing high-capacity full port valve bodies, commercial developers can design systems that run with reduced pump speeds, leading to long-term energy savings.
Furthermore, integrating zone manifolds, differential pressure bypass valves, and smart actuator control boxes allows engineers to configure responsive, dynamic thermal loops. This provides consistent indoor comfort while reducing carbon footprints. Yuhuan Yongda delivers integrated solutions—spanning from raw copper fittings to intelligent concentration hub controllers—assuring that every part of the distribution chain functions seamlessly.
Valves operating in open and closed hydronic systems face continuous chemical and mechanical stresses. Factors like dezincification, oxidation, thermal expansion, and mechanical vibration can degrade sub-par materials, leading to system failure. The foundation of high-performance fluid control lies in material science:
Founded in 1996 in Yuhuan, Zhejiang—widely recognized as the "China Valve Capital"—Yuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) has evolved into a premier global designer, developer, and manufacturer of brass valves, fittings, and HVAC products. Focused on middle and high-grade global markets, our products prioritize environmental compatibility, structural durability, and hydraulic efficiency.
With a vast production footprint spanning over 45,000 square meters (and an actual usable area reaching 80,000 square meters), our facilities feature more than 600 sets of advanced manufacturing and testing equipment. This includes 80+ specialized CNC machining tools, allowing us to serve diverse technical demands across more than 20 countries.
Cokaren is Yuhuan Yongda’s premium brand, created to offer refined aesthetics, tight tolerance engineering, and elite performance. Guided by the brand promise "keep flowing, keep warming", Cokaren designs water system components that ensure residential comfort and industrial reliability. Our strategy positions Cokaren as a dynamic brand focused on steady international growth and world-class product delivery.
Core Values: Struggle, Enterprising, Pragmatic, Innovative
Tenet: Customer First, Quality Based
Quality Policy: Fine Work, Zero Leakage
Exporting fluid control products to regulated markets requires strict adherence to international safety, material, and performance standards. Yuhuan Yongda holds ISO9001:2015 Quality Management System Certification, ISO14001:2015 Environmental Management System Certification, and ISO45001:2018 Occupational Health and Safety Management System Certification.
Our full port valves carry CE Certification under the Pressure Equipment Directive (PED) 2014/68/EU. This guarantees that our valves are designed, analyzed, and pressure-tested to handle nominal pressure ratings (PN16, PN25, PN40) safely. Every batch undergoes strict shell hydrostatic tests and seat tightness checks to ensure leak-free performance before shipment.
Yuhuan Yongda designs integrated systems that control energy and fluid distribution across modern residential and commercial architectures.
The first line of defense in domestic water sanitation, designed to filter out 98% of particulates and impurities in the piping network.
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Controls flow rates for hot and cold boiler cycles using a high-precision spherical spool.
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Automatically releases accumulated air from air-source heat pumps and closed hydronic systems to maintain system efficiency.
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Mixes hot and cold water supplies to stabilize output temperatures and prevent thermal shock in municipal systems.
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Integrates room temperature monitoring with manifold actuators for zone heating optimization.
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Enables systematic purging, dynamic testing, and isolation within HVAC distribution manifolds.
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Ensures uniform flow distribution across multiple floor heating loops to maximize comfort.
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System Output End
Detailed design specifications, visual references, and links to technical specifications for our complete hardware lineup.
Combines isolation and particulate filtering in a single unit, saving installation space.
Provides precise mechanical control of hydronic line temperatures.
Controls and stabilizes hydronic system temperatures through proportional fluid mixing.
Engineered for multi-loop water systems, assuring quiet, balanced fluid distribution.
Premium outdoor utility valve designed for frost resistance and high flow rates.
Bi-directional threaded wedge gate valve optimized for water isolation service.
Corrosion-resistant brass connectors for commercial municipal water meter stations.
Meets NPT sizing requirements, providing secure connection in commercial tubing applications.
The heating, ventilation, and plumbing industries are experiencing a shift toward digital integration, lead-free material compliance, and intelligent system regulation. Yuhuan Yongda's R&D department focuses on alignment with these global structural changes:
Our centralized hub controllers link electric actuator valves and smart room thermostats, optimizing multi-zone residential hydronic temperature profiles.
We are expanding lead-free brass formulations (like CW511L or C46500) to meet evolving municipal drinking water standards in Europe and North America.
Refining internal geometry, utilizing high-grade PTFE seals, and applying mirror-polished plating to the valve balls reduces structural friction, lowering actuator size and power needs.
This technological focus ensures that Yuhuan Yongda products remain reliable, compatible, and ready for future global green building and high-performance energy rating standards.
Practical answers to common engineering, procurement, and design queries regarding brass valves and hydronic distribution.
A full port valve matches the inner diameter of the connecting pipeline, ensuring unrestricted fluid flow. This reduces pressure drop ($dP$) and turbulence, which helps prevent cavitation, reduces piping wear, and lowers the power consumption of system pumps.
Standard heating systems commonly use CW617N or HPb59-1 forged brass. For potable domestic water systems, lead-free brass (e.g., CW511L or C46500) or dezincification-resistant (DZR) brass is required to prevent chemical leaching and comply with sanitary drinking water regulations.
It maintains stable flow and pressure by opening automatically when zoning actuators close, redirecting excess flow. This prevents noise, limits pump pressure stress, and keeps the system balanced.
Valves must be designed and manufactured in line with Sound Engineering Practice (SEP) or meet specific category requirements based on pressure ($PS$) and volume ($V$). Compliance is verified through rigorous material analysis, proof testing, hydrostatic pressure tests, and third-party audits.
The control box acts as a concentrator hub. When room thermostats call for heat, the controller signals the relevant thermal actuators to open and triggers the boiler or heat pump to run, ensuring coordinated heating distribution.
Yes, our in-house engineering team designs and manufactures custom thread pitches, configurations, and surface treatments to meet specific commercial project requirements.
Our brass heating valves are rated to operate continuously between $-20^\circ\text{C}$ and $120^\circ\text{C}$, depending on the specific model and O-ring materials used.
It continuously releases trapped air bubbles from the piping. Eliminating air pockets reduces noise, limits oxidation and internal corrosion, and prevents air locks that can disrupt flow.
Browse our selection of heavy-duty gate valves, bypass configurations, and specialized brass plumbing fittings.
