Yongda
Yongda
Explore our elite selection of certified flow controllers, manifolds, and vacuum-grade adapters engineered for zero leakage.
Founded in 1996, Yuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) has grown to become a cornerstone manufacturer of premium brass valves, HVAC manifolds, and high-performance flow control mechanisms. Centered in Yuhuan, Zhejiang—widely recognized as the "China Valve Capital"—our facilities align state-of-the-art automation with rigorous quality management protocols.
Our operational footprint encompasses a massive 45,000 square meters factory area, with a total usable workspace reaching over 80,000 square meters. By maintaining tight integration over forging, machining, assembly, and pressure testing, we serve key infrastructure systems in North America, Europe, and Asia. Our brand, Cokaren, champions the philosophy of "keep flowing, keep warming", delivering dynamic safety and heating distribution systems to millions of households worldwide.
A comparative overview of mechanical thresholds, pressure sealing, and metallurgical choices in high-vacuum and positive pressure configurations.
In high-pressure HVAC, radiant distribution networks, and vacuum-sealing installations, the mechanical integrity of the ball valve determines the stability of the entire loop. Standard valves struggle to retain hermetic seals under sub-atmospheric pressures. True vacuum ball valves require unique structural engineering: low outgassing elastomeric components, precision-ground spheres, and structural brass structures that prevent molecular migration across borders.
Our technical engineering team focuses heavily on mitigating micro-cavitation and molecular friction. By utilizing premium, hot-forged brass alloys (such as CW617N and lead-free C37700), we achieve zero-porosity castings. Porous brass is a primary vector for tiny structural leaks that compromise low-to-medium vacuum applications. Our production line integrates double stem O-rings made from specialized fluoropolymer elastomers (FKM / Viton) alongside custom-tensioned PTFE seats, ensuring reliable containment at both ends of the pressure spectrum.
| Engineering Attribute | Standard Brass Ball Valves | Yongda Premium/Vacuum-Grade Valves | Industrial Application Advantages |
|---|---|---|---|
| Metallurgical Base | Recycled Brass (High Porosity) | Hot-Forged CW617N / Hpb57-3 / Lead-Free Brass | Zero-porosity, preventing micro-leakage in vacuum lines. |
| Stem Seal Configuration | Single NBR/EPDM O-ring | Double FKM (Viton) + Adjustable PTFE Packing | Resists outgassing and maintains seal integrity up to 10⁻³ Torr. |
| Sphere Surface Finish | Rough Chrome Finish | Diamond-polished Sphere (< Ra 0.2 μm) | Minimizes seal friction, reducing operating torque and wear. |
| Testing Certifications | Basic Hydrostatic Testing | 100% Pneumatic Leakage Test + Helium Leak Detection | Guaranteed bubble-tight shutoff across HVAC & gas lines. |
From smart residential zoning to commercial vacuum loops, our production line powers global infrastructure.
Yongda's stainless steel and brass manifolds partition complex hot water networks, optimizing thermal output via smart mixing shunts. Engineered to handle continuous thermal cycling without mechanical fatigue.
Widely integrated into industrial HVAC vacuum pump circuits. Our valves support deep evacuation lines, allowing techs to purge moisture and non-condensables without ambient air leakage.
Utilized as primary shutoffs in water purification arrays. Heavy-duty brass compositions withstand chemical treatments, ensuring clean water delivery for commercial installations.
Our facility runs on a simple, absolute operational principle: "Fine work, no leakage". To guarantee performance, every batch undergoes pressure stress evaluation and sealing inspections before leaving the warehouse.
We maintain verified certifications across major regulatory standards:
By blending advanced multi-axis CNC machinery with automated testing rigs, Yongda provides OEM partners with stable lead times and highly repeatable quality metrics across production runs.
Aligning structural valve design with smart automation, internet-of-things (IoT) ecosystems, and sustainable metallurgy.
As smart cities and high-efficiency buildings expand, water distribution networks are transforming from static hardware loops into smart, digital ecosystems. The next generation of Yongda valves integrates physical fluid barriers with electronic feedback. We are actively developing low-torque motorized ball valves and IoT-compatible temperature controllers that adjust flow rates dynamically based on real-time ambient data.
Additionally, we are focusing heavily on metallurgy. Research is currently underway to optimize lead-free brass formulations that meet the strict requirements of direct-contact drinking water standards like NSF/ANSI 61 and the European Drinking Water Directive. By upgrading our automated hot-forging lines and installing real-time spectral alloy analyzers, we ensure our materials resist dezincification (DZR) and galvanic corrosion, even in demanding high-vacuum settings.
Expert technical insights regarding brass composition, vacuum thresholds, and HVAC system integration.
High-durability Y-strainers, automatic air vents, smart thermostats, and compression components for end-to-end fluid management.
