Yongda
Yongda
High-precision brass valves, connectors, and digital temperature control assemblies for complex industrial, commercial, and residential hydronic networks.
Heavy-duty piston mechanism designed for high-stress municipal and domestic pressure reduction.
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Precision-machined NPT and BSP threaded configurations for leakproof transition joints.
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Corrosion-resistant high-copper alloy fittings built to US outdoor water connection tolerances.
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Microprocessor-driven ambient temperature regulator for active floor-heating loop optimization.
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Engineered for cleanouts and end-of-line plumbing applications in industrial fluid dynamics.
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Full-bore configuration designed to minimize head loss and maximize fluid transfer efficiency.
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Forged brass multi-directional connector optimized for fluid division and blending lines.
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Crucial system purging accessory to eliminate air lock conditions in underfloor circuits.
View PricingIn industrial, commercial, and municipal fluid delivery systems, managing static and dynamic pressures is paramount to system reliability. Pressure Reducing Valves (PRVs) serve as the automated safeguard, stepping down variable, high inlet pressures to a stabilized, consistent lower outlet pressure. This is not merely a safety precaution; it is an economic necessity that prevents catastrophic piping fatigue, thermal expansions, water hammers, and premature failures of plumbing fixtures.
Whether implementing a direct-acting spring loaded piston mechanism or a hydraulic pilot-operated diaphragm system, the goal remains: maintaining downstream balance despite upstream fluctuations. Yuhuan Yongda Fluid Control Co., Ltd. applies decades of metallurgic expertise and hydro-dynamic research to forge valve technologies that optimize flow coefficient values (Cv) while mitigating structural turbulence.
Established in 1996 | Zhejiang, China — The Valve Capital of the World
Formerly known as Yuhuan Yongda Plumbing Co., Ltd., our company was established in 1996 in Yuhuan, Zhejiang. As a premier manufacturer in the HVAC and plumbing valves industry, we integrate product conceptualization, CAD design, state-of-the-art smelting, high-pressure forging, CNC machining, and comprehensive quality test validations under one roof.
We focus on mid-to-high-end products divided into three core pillars: brass valves, plumbing fittings, and HVAC system components. Highlighting eco-friendly metallurgy, lead-free composition, and extreme pressure testing, our catalog is highly favored in North America, Europe, and neighboring global markets.
Our premier brand, Cokaren, represents our promise: "keep flowing, keep warming". Cokaren is dedicated to manufacturing products with refined aesthetic qualities, strict dimensional controls, and unmatched durability for smart residential hydronic and domestic supply networks.
At Yongda, our core principles govern every step of our technical roadmap:
Our facility maintains active compliance with three key international protocols: ISO9001:2015 (Quality Management Systems), ISO14001:2015 (Environmental Stewardship Systems), and ISO45001:2018 (Occupational Health & Safety Frameworks).
Optimal flow balancing and fluid conditioning modules configured for modern floor manifolds, boiler systems, and smart HVAC controllers.
The primary engineering defense in residential and commercial sanitation. Filters up to 98% of particulates and suspended sand/rust in plumbing loops.
Equipped with a precision spherical spool to modulate high-temperature cold/hot water inlet loops in domestic boiler configurations.
Specifically designed to continuously bleed entrained air from air-source heat pumps and closed-loop hydronic circuits, preventing pump cavitation.
Stabilizes system delivery temperature by blending returns with heated supply lines, protecting sub-floor PEX layouts from thermal damage.
Smart thermodynamic hub communicating with actuators and valves to maintain customized zone temperature parameters.
Multipurpose manifold entry group facilitating particle isolation, temperature gauge integration, and air purge actions.
Central distributor managing hydronic flow splits across multiple zones. Pairs with automatic thermal actuators for precise microclimate controls.
Analyzing supply lines, metallurgic standards, and procurement requirements for engineering corporations.
Modern procurement officers in fluid handling departments look past simple unit pricing. High-tier civil systems demand valves with traceable certificates of testing, validated metallurgy, and chemical compatibility declarations. The global demand has shifted toward Eco-Friendly Low Lead and Lead-Free Alloys due to tightening drinking water safety acts like Title XIV of the US Safe Drinking Water Act and comparable EU standards.
Furthermore, engineering firms are prioritizing suppliers offering Local Support and Compliance. A reliable manufacturer must guarantee that products imported into destination countries are verified to withstand municipal pressure levels without high-frequency vibrations or structural failure, saving countless hours in troubleshooting.
Procuring forged brass demands CW617N or equivalent lead-free formulation. Sourcing from manufacturers utilizing spectrometry analysis guarantees that trace elements like bismuth or silicon replace lead while retaining mechanical forgeability and machinability.
Integrating thermostatic elements and electrical actuators with standard mechanical valve bodies allows central building management systems (BMS) to run real-time balancing, reducing municipal water wastage by over 20%.
Mechanical fatigue is the leading cause of pressure reducer failure. The future technical roadmap highlights heavy-gauge stainless steel spring casings, EPDM membrane diaphragms, and self-cleaning internal mesh filters to extend active service life up to 15 years.
Explore high-resolution product offerings designed for dynamic fluid system control.
Dual function isolation and filtration in a compact forged body, protecting sensitive downstream systems.
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Manual regulation configuration engineered for localized radiator control loops.
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Stabilizes and mixes supply and return lines in multi-zone heating systems.
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Premium brass manifold designed for high flow rates and low pressure drops.
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Highly durable exterior supply connection with positive shut-off design.
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Female threaded flow stop mechanism designed for absolute fluid isolation.
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Solid brass connectors certified for domestic water meter assemblies.
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Engineered hose connect options conforming to US thread standards.
Explore OptionsExporting fluid handling systems to regions like North America or the European Union requires alignment with strict regulatory guidelines. Plumbing valves deployed in potable drinking water lines must prevent heavy metal leaching. Our brass components are analyzed via advanced spectrometry to guarantee minimal lead and high dezincification resistance (DZR).
Beyond material safety, mechanical strength is verified through cyclical pressure fatigue tests, burst pressure tests, and acoustic checks to confirm compliance with European Norms (EN) and ASME standards. This makes our pressure reducers and manifold assemblies ready for high-profile green building certifications such as LEED and BREEAM.
Key questions answered by our chief fluid systems engineer.
Static pressure reduction refers to downstream pressure maintenance when no fluid is flowing (zero flow rate). Dynamic pressure reduction applies when water flows through the piping system. High-quality piston-based PRVs prevent pressure creep, ensuring the downstream pressure stays within safe thresholds during both active flow and zero-demand periods.
Standard yellow brass is susceptible to dezincification in aggressive water environments, which weakens the metal matrix and causes pinhole leaks. Dezincification Resistant (DZR) brass prevents the loss of zinc, retaining the structural integrity of the valve under high mechanical pressures while complying with international lead-free health regulations for drinking water systems.
First, isolate the valve using upstream and downstream shut-off valves. Unscrew the bottom cap of the PRV housing where the filter screen is located, remove the stainless steel mesh filter, rinse away mineral deposits and sediment under running water, and re-insert the screen before checking the seal.
Acoustic hums are typically caused by cavitation or excessive flow velocity inside the valve throat. Choosing a valve with proper flow coefficient dimensions (Cv) and setting the inlet-to-outlet reduction ratio below 3:1 helps eliminate fluid turbulence and structural vibrations.
High precision check valves, mechanical air vents, compression units, and specialty fittings.
Select plumbing accessories, HVAC control valves, and adapters for building infrastructure systems.
Heavy duty elbow connector designed for high-stress turning points in water piping.
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Corrosion resistant forged adapter for industrial and residential tube line connections.
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Smart ambient controller for active modulation of hot water floor heating loops.
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Ensures equal heat distribution by balancing flow rates across multiple manifold zones.
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Specialized angle shutoff valve designed for boiler intake/outlet high temp operations.
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Thermostatic control accessories to regulate steam/hot water output in commercial HVAC.
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Certified end-of-line plug for sealing PEX and copper pipe segments in hydronic lines.
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Corrosion resistant brass compression sleeve connectors for fast, reliable line repairs.
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