Yongda
Yongda
Founded In
Factory Area (Sq. Meters)
Advanced Production & Testing Sets
Exported Countries
Explore our elite selection of industrial-grade brass gate and stop valves engineered for superior durability, flow control, and zero leakage.
Understanding the transition from crude isolating valves to intelligent multi-turn globe interfaces.
In modern piping infrastructure, the stop valve stands as the ultimate device for regulating or isolating the flow of liquids, gases, and steam. Historically developed as simple shut-off mechanisms, stop valves have evolved into highly optimized components featuring sophisticated flow-path configurations, heavy-duty forged materials, and precision sealing.
Specifically designed to offer tight, bubble-tight sealing against high pressures, stop valves (often incorporating a globe-type design) regulate medium flow using a linear movement disk that seats perpendicular to the axis of flow. This creates an exceptionally reliable seal but comes with a design trade-off: a higher pressure drop compared to full-port ball or gate valves. Engineers specify stop valves when precise control, regular cycling, and absolute isolation are necessary.
For global systems procurement, understanding the dynamics of fluid dynamics—such as minimizing cavitation, selecting the correct seat elastomers (PTFE, EPDM, or FKM), and understanding the effects of metallurgical integrity on valve longevity—is paramount to system resilience.
Founded in 1996, Yuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) has grown to become a cornerstone manufacturer in the "China Valve Capital" of Yuhuan, Zhejiang. The company integrates design, research and development, manufacturing, and global sales into a comprehensive modern enterprise.
Yuhuan Yongda’s premium portfolio spans three key segments: brass valves, high-performance pipe fittings, and smart HVAC control systems. Our market positioning focuses on mid-to-high-grade plumbing products, emphasizing environment-friendly brass alloys, high manufacturing precision, and lead-free sustainability. These metrics have made us a preferred partner for industrial distributors and OEM brands in North America, Europe, and neighboring regions.
Cokaren, the newly launched premium sub-brand of Yuhuan Yongda, is dedicated to superior quality and aesthetic refinement. Living by the brand promise "keep flowing, keep warming", Cokaren produces residential and commercial HVAC accessories designed to ensure comfort, system durability, and energy efficiency.
Explore our integrated technological solutions designed for smart heating control and high-efficiency water resource management.
Our comprehensive suite of water filtration, balancing manifolds, venting mechanisms, and smart zone thermostats allows building operators to design optimal energy distribution loops.
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, control the back-end manifold, measure temperature and water pressure.
Distribute water flow to various rooms and combine with equipment to adjust the room temperature.
Addressing material specifications, regulatory frameworks, and engineering standards for international valve sourcing.
B2B procurement professionals sourcing stop valves and HVAC control systems are facing increasingly strict regulatory requirements. In North America, the Safe Drinking Water Act (SDWA) mandates that wetted surfaces of pipes, fittings, and valves contain no more than 0.25% lead. This has accelerated the shift toward lead-free brass (C27450, C46500, or bismuth-alloyed brass). Sourcing agents must verify that suppliers comply with NSF/ANSI 61 and NSF/ANSI 372 certifications.
In the European Union, the EN 12164 / EN 12165 standards govern the composition of brass alloys for machining and forging (such as CW617N and CW602N). CW602N is particularly valued for its Dezincification Resistance (DZR), preventing structural degradation in acidic or aggressive water systems.
NSF/ANSI 61, NSF 372, Lead-Free Brass, ASTM B124 / B124M Forging standard, NPT threading standards.
EN 12165 CW617N/CW602N, CE mark for pressure equipment (PED 2014/68/EU), ISO 228-1 Parallel threads.
ISO 9001:2015 Management, ISO 14001:2015 Environment, ISO 45001:2018 Health & Safety, 100% pneumatic testing.
Yuhuan Yongda's smart production facility spans a 45,000 square meter factory footprint, with actual usable space reaching 80,000 square meters. To maintain quality consistency, the factory operates more than 600 sets of advanced production and testing equipment, including 80+ special machine tools.
The integration of CNC multi-axis machining centers, automatic hot forging presses, and multi-station rotary indexing machines represents the vanguard of Factory 4.0 in China. By automating tool paths and hot forging processes, we maintain dimensional tolerances within microns. This limits material waste, enhances structural integrity, and ensures that every single stop valve features a "fine work, no leakage" seal.
In terms of supply chain resilience, Yuhuan Yongda operates an integrated ecosystem. From raw material sorting and alloy formulation to hot forging, precision machining, surface finish plating, and performance stress testing, the entire value chain is contained in-house. This cushions global buyers from raw material bottlenecks and shortens standard delivery lead times.
Browse Yuhuan Yongda and Cokaren's main product catalog, manufactured according to CE and ISO quality guidelines.
Designed to filter suspended particles in pipelines while providing isolation. Features high-flow performance and an easily cleanable mesh screen.
Features manual temperature adjustments for optimal hydronic control in heating systems.
Ensures stable mixed-water temperatures in floor heating networks by adjusting input parameters.
Underfloor heating manifold system designed to distribute heat dynamically across zones.
Outdoor brass water outlet featuring high chemical resistance and standard thread connections.
Traditional isolation valve featuring robust forged body design and multi-turn cast iron handwheel.
Corrosion-resistant connection tubes engineered for domestic water meters.
Highly reliable hose connection fittings produced for NPT/industry standards in North America.
The following specialized line represents Yuhuan Yongda's focus on high-durability forged components and automated air release safety items:
How our stop valve and manifold designs are implemented in domestic and commercial structures globally.
Our brass manifolds split flows into floor circuits. Paired with mixing loops, they stabilize input temperatures, preventing cracking in wood or tile flooring.
In Nordic and Eastern European systems, shut-off valves isolate individual sub-stations. High durability materials are mandatory to resist thermal shocks.
Certified lead-free stop valves protect hospitals and schools from metal leaching, and secure water loops during routine upkeep.
Direct technical answers addressing the core concerns of engineering, procurement, and construction (EPC) professionals.
A stop valve (frequently structured as a globe valve) regulates flow through a disk that moves perpendicular to the seat, making it highly effective for throttling and frequent shut-offs. A gate valve, conversely, is strictly designed for full-flow isolation. Gate valves use a flat wedge that slides into the flow stream, minimizing pressure drop when open, but they are unsuitable for throttling due to high disk vibration and premature wear under partial flow.
CW617N is a classic European hot forging brass containing 57-59% Copper and 1.6-2.5% Lead. The lead content enhances machinability and sealing during forging. However, for potable water systems in North America (NSF 372) and under new EU drinking water regulations, lead-free alternatives like CW724R (silicon brass) or bismuth brass are increasingly specified to keep lead levels under the 0.25% limit.
Our material selection includes DZR brass alloys (such as CW602N). Through thermal management after hot forging, we prevent zinc leaching from the brass matrix when exposed to oxygenated or acidic water, protecting the valve body from structural failure.
Every production batch undergoes structural integrity analysis using spectrometers to check the chemical composition. Afterward, 100% of finished valves are subjected to pneumatic pressure testing (typically at 6 bar for water valves) and high-pressure shell hydrostatic testing to guarantee zero leaks before packing.
Premium thermostats, multi-port manifolds, and engineered fittings designed to optimize HVAC system flow.
