Yongda
Yongda
Explore our leading fluid control systems manufactured in our state-of-the-art facilities, certified to ISO standards for ultimate reliability.
In modern industrial and municipal piping systems, flow regulation and absolute containment are critical variables. Gate valves, designed primarily for isolation services rather than modulation, serve as the backbone for high-flow, low-friction fluid dynamics. From deep-bore municipal water grids to multi-zone hydronic HVAC architectures in skyscraper complexes, the necessity for robust, low-maintenance isolation mechanisms is escalating globally.
As standard piping designs adapt to strict environmental regulations, the demand for high-grade copper alloys—specifically de-zincification resistant (DZR) brass and zero-lead bronze—has surged. North American standards like NSF/ANSI 61 and NSF/ANSI 372 have fundamentally altered manufacturing processes, demanding that materials in contact with potable water do not leach lead. In Europe, the EN 12266-1 standard defines rigorous industrial pressure and leakage metrics that all exported valves must satisfy. As a result, the market has transitioned away from cheap, porous castings toward high-tensile hot forged valves capable of enduring extreme thermal gradients and mechanical stress.
| Region / Standard | Core Compliance Target | Material/Design Requirements |
|---|---|---|
| North America (NSF/ANSI 61/372) | Lead-Free Potable Water Safety | Lead content < 0.25% weighted average on wetted surfaces | Europe (EN 12266-1 / WRAS) | Hygienic Safety & Structural Integrity | Zero leakage under gas and hydrostatic pressure limits |
| Global Industrial (API 598) | High-Pressure Isolation Assurance | Strict valve seat and backseat shell pressure test protocols |
At their core, gate valves operate via a mechanical wedge or gate that moves perpendicular to the flow direction. This design ensures that when fully open, the flow path is entirely unobstructed, offering minimal pressure drop (nearly zero flow coefficient resistance) compared to globe or ball valves. This makes them ideal for systems running viscous fluids or high-volume water lines.
In municipal plumbing systems, gate valves act as critical isolators to isolate sections of piping for maintenance. Our forged brass gate valves utilize Lead-Free and DZR alloys, preventing galvanic corrosion in regions with variable water chemistry. Their non-rising stem (NRS) design is highly valued in tight utility vaults where vertical clearances are constrained.
Large-scale HVAC systems rely on efficient chillers and boilers. Here, brass gate valves isolate manifolds, pumps, and mixing systems. Because they close slowly, they inherently prevent the destructive hydraulic phenomenon known as water hammer, shielding delicate pressure sensors, heat exchangers, and thermostats from catastrophic pressure spikes.
In light chemical processing, agricultural liquid management, and factory air pipelines, gate valves must withstand high cycling. By employing solid, precision-machined brass wedges coupled with high-grade PTFE packing, our valves ensure bubble-tight shutoff at pressures exceeding PN16, while maintaining resistance to mild corrosive elements and sediment buildup.
Yuhuan in Zhejiang province is recognized globally as the "Valve Capital of China." This industrial cluster provides an unparalleled concentration of metallurgical research, hot-forging technology, and precision machining services. Operating within this ecosystem allows us to achieve manufacturing scale and quality control that is difficult to replicate elsewhere.
At Yuhuan Yongda Fluid Control Co., Ltd. (founded in 1996), our manufacturing setup includes over 45,000 square meters of production floor space (expanding to 80,000 square meters of actual usable space). We operate more than 600 sets of advanced manufacturing and testing apparatuses, including 80+ specialized CNC machine tools. This scale enables us to rapidly adjust production volume, fulfill massive OEM/ODM orders, and customize designs to client specifications.
Our quality system is driven by our policy: "Fine work, no leakage." By controlling every step of the process—from raw ingot casting and precise spectroscopic composition verification to automated hot forging and 100% hydrostatic leakage testing—we deliver zero-defect reliability. This rigorous approach supports our premium brand, Cokaren, which is built on the promise of "keep flowing, keep warming."
Our State-of-the-Art Factory in Yuhuan, Zhejiang
The valve manufacturing industry is undergoing a digital and material transformation. As we look to the future, we have structured our engineering roadmap around three primary pillars:
Developing bismuth-alloyed and silicon-doped brasses to replace lead content entirely without sacrificing machineability or tensile strength. These new materials are designed to comply with future EU and EPA lead regulations.
Integrating mechanical valves with automated electric actuators (such as our Y2010/Y6012 HVAC series) and digital smart thermostats. This allows for automated remote shut-off and real-time flow management in smart buildings.
Deploying specialized Physical Vapor Deposition (PVD) coatings on internal moving wedges and using advanced EPDM and PTFE composites to extend valve service life in extreme fluid conditions.
Exporting to highly regulated markets like Europe and North America requires strict adherence to international safety and management standards. We back our ODM/OEM processes with rigorous certifications:
Our localized support structure offers tailored engineering and packaging services for global customers. Whether you need custom thread profiles (NPT, BSP, or G-threads), private labeling, or custom pressure ratings, our team is equipped to meet your market's technical and regulatory demands.
Every single valve undergoes pressure testing before leaving our facility. This includes hydrostatic testing of the body and seat to verify structural integrity and ensure zero seat leakage, providing reliable performance in demanding installations.
Learn more about Yuhuan Yongda's operational structure, system architectures, and core product offerings.
Our distribution systems integrate water filtration, boiler management, air release venting, and multi-zone manifold routing to deliver precise, balanced heat and water control throughout domestic and commercial buildings.
Culture: Struggle, Enterprising, Pragmatic, Innovative
Tenet: Customer first, Quality based
Quality Policy: Fine work, no leakage
We are dedicated to building our company's capability and motivation, improving worker compensation, and matching business success with personal satisfaction.
Our facilities are fully certified under ISO9001-2015 for quality management, ISO14001-2015 for environmental protection, and ISO45001-2018 for occupational health and safety. These systems guide our raw material sourcing, forging operations, and product delivery.
Read our answers to common questions about gate valve selection, materials, and installations.
Gate valves are designed for full-flow isolation. When open, the gate retracts fully, leaving the flow path clear and minimizing pressure drop. Ball valves also offer low pressure drops, but gate valves close more slowly. This slow operation helps prevent water hammer, making them safer for high-volume piping and sensitive systems.
De-zincification happens when zinc leaches out of brass alloys in corrosive environments, leaving a weak, porous copper structure prone to leakage. We prevent this by using specialized De-zincification Resistant (DZR) brass alloys and lead-free alloys. These materials are forged under controlled temperatures to maintain structural integrity and resist zinc leaching in aggressive water conditions.
Yes. Our brass gate valves are rated for high-temperature service. By using pure PTFE stem packing and high-temperature EPDM seat seals, they remain stable at temperatures up to 120°C (248°F). This thermal resistance makes them well-suited for hot-water solar loops, manifold rooms, and hydronic space-heating systems.
Our ODM services cover everything from design adjustments to testing. We customize thread styles (NPT, BSPP, BSPT), pressure ratings (PN10 to PN25), handle colors, and material alloys (CW617N, DZR, Lead-Free). We can also co-develop custom valves to integrate with actuator packages and smart control systems.
Review our portfolio of brass, bronze, and smart system options manufactured for domestic and commercial HVAC installations.
Protects mechanical components by combining inline filtration with flow isolation.
Enables precise control of thermal fluid delivery in radiators.
Designed for radiant heating to maintain consistent supply temperatures.
Distributes hot water loops across sub-zones in floor heating systems.
Outdoor utility valve designed for reliable anti-corrosive performance.
Heavy-duty forged body featuring low pressure loss and a rising/non-rising stem.
Precision connection fittings designed for municipal supply lines.
Secure hose connections optimized for industrial PEX standards.
Explore our export-ready products, designed for global trade and compliance with international mechanical systems.
