Yongda
Yongda
Engineered to handle extreme fluid dynamics, providing optimal throttling, mixing, and filtration for modern hydronic networks.
Robust multiple-loop control designed for domestic and light commercial zone distribution.
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Maintains secondary loop fluid stabilization to prevent pipeline shock and surface condensation.
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Premium heat regulation featuring high sensitivity actuator compatibility for multi-zone systems.
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Filters up to 98% of particulate impurities to protect heat exchangers and zone valves from fouling.
Inquire NowThailand's tropical climate demands highly reliable cooling networks. With outdoor temperatures regularly exceeding 35°C and relative humidity levels hovering around 80-90%, local HVAC architectures suffer massive thermal and dynamic stress. Rapid industrialization across the Eastern Economic Corridor (EEC) including Rayong, Chonburi, and Chachoengsao is driving a massive shift from traditional direct cooling systems to smart, hydronic, energy-efficient HVAC networks.
Modern commercial high-rises in Bangkok, data centers in Samut Prakan, and electronics factories in Pathum Thani require strict water loop stability. If the pressure balance, air removal, or temperature mixing fails, system coefficient of performance (COP) drops, raising electricity bills dramatically. This demands advanced components: precision water manifolds, automatic air vents, and high-performance temperature control valves.
Founded in 1996 and located in Yuhuan, Zhejiang—widely recognized as the "China Valve Capital"—Yuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) has spent nearly three decades specializing in the research, design, production, and distribution of premium brass valves, fittings, and HVAC system parts.
Under our premium brand Cokaren (with the core brand promise "Keep flowing, keep warming"), we deliver reliable water control products to global markets including North America, Europe, and Southeast Asia. Spanning a physical factory footprint of 45,000 square meters (with a functional usable area of 80,000 square meters), our plant is equipped with over 600 sets of automated production and testing equipment, including 80+ specialized CNC machine tools to ensure exceptional manufacturing repeatability.
Through our rigorous quality policy—"Fine work, no leakage"—we ensure that every valve and manifold meets strict global standards. Our operations are fully certified under ISO9001:2015 (Quality Management), ISO14001:2015 (Environmental Management), and ISO45001:2018 (Occupational Health & Safety).
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Deploying advanced automation and strict metallurgical tracing to mitigate supply chain disruptions and lower total cost of ownership (TCO).
Using advanced multi-axis hot forging presses to eliminate micro-porosity in our brass bodies. This guarantees zero leakage and exceptional crack resistance under high line pressures (up to PN25).
Moving beyond basic hydro-tests, our assembly lines employ automated dry helium pressure decay tests, detecting micro-leaks down to 10⁻⁵ mbar·l/s for absolute long-term performance.
Our in-house foundry produces high-grade Dezincification Resistant (DZR) brass (e.g., CW617N, HPb59-1). This prevents zinc leaching when exposed to aggressive tropical waters, common in Thailand's coastal projects.
By integrating raw material sourcing, automated machining, and real-time ERP logistics, Cokaren provides global partners with stable lead times, robust quality certificates, and competitive pricing, protecting projects from market price spikes.
Request Metallurgical Data SheetsHow Cokaren products work together to maximize delta T (ΔT) and reduce pump power consumption in hydronic loops.
In hydronic heating and cooling systems, the energy distribution layout is the core link connecting primary generation (chillers/boilers) to terminal zones. Cokaren's product range provides systematic flow control:
Complete control line-up including thermostatic units, purging ports, and heavy-duty isolate valves for seamless HVAC operation.
Spherical spool configuration optimized for safe isolation under extreme temperatures.
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Designed for quick maintenance in complex multistory building duct and pipe layouts.
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Allows remote temperature programming to lower central HVAC power draw in unoccupied zones.
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Fused joints eliminate path-of-leakage hazards, ideal for industrial cleanroom applications.
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Integrated air purger with brass tail fittings designed to discharge system air pockets automatically.
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Robust venting mechanisms that prevent thermal locks in complex water loops.
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Adjustable discharge settings to match local system working pressures and volume demands.
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Precision-machined end caps designed to simplify manifold air purging and cleaning.
Inquire NowSpecific field use cases showcasing product reliability in extreme hot climates.
Controlling hydronic condensation in ceiling spaces. Mixing shunts precisely manage dew point temperatures on pipe surfaces.
High heat density computing centers in Samut Prakan rely on Cokaren automatic air vents and manifolds for continuous chilled water loop air-purging.
Strict cleanliness demands DZR lead-free brass pre-filters to stop particulate contamination in equipment washdowns.
Saline coastal air causes intense galvanic corrosion. Our nickel-plated and thick-walled brass valves resist atmospheric salt spray damage.
Get professional answers about HVAC engineering, material selections, and sourcing dynamics for Thailand and Southeast Asia.
Dezincification Resistant (DZR) brass prevents zinc from leaching out of the alloy when exposed to water with high mineral content, aggressive pH levels, or high temperatures. In tropical areas like Thailand, where cooling towers rely on diverse water supplies, using standard brass can lead to structural weakness and pinhole leaks. Cokaren uses CW602N and customized low-lead brass alloys to ensure long-term mechanical reliability under these conditions.
Our standard HVAC valves and manifold components are designed and tested to withstand working pressures of PN10, PN16, and PN25. For high-rise projects in Bangkok or heavy industrial plants, we provide customized, heavy-duty valve bodies with thicker walls to handle higher dynamic pressures and hydraulic surges.
Air pockets in chilled water lines act as insulators, reducing heat transfer efficiency at heat exchangers and air handling units (AHUs). Air accumulation also increases pump flow resistance, driving up energy use. Our automatic air vents continually discharge micro-bubbles, maintaining maximum heat exchange and protecting system pumps from dry-running or cavitation damage.
Yes. Leveraging our engineering office and over 80 CNC machines, we offer OEM/ODM services for underfloor cooling/heating manifolds. We can customize port counts (from 2 to 12 loops), flow meters, dynamic balancing valves, integrated differential pressure bypass systems, and connections to match local specifications in Thailand.
Standard manufacturing times for mass production runs range from 30 to 45 days. We ship out of nearby ports like Ningbo or Shanghai directly to Thailand's Laem Chabang port, keeping sea transit times within 7 to 10 days to keep local construction schedules on track.
Partner with Yuhuan Yongda & Cokaren for high-quality, DZR brass HVAC components. Contact our applications engineering department today to request samples, mechanical drawings, or direct factory pricing.
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