Yongda
Yongda
Explore our high-performance brass fittings, automatic vents, and precision flow control components designed for low-emission, leak-free HVAC and water supply infrastructure.
Located in Yuhuan, Zhejiang—widely recognized as the "Valve Capital of China"—Yuhuan Yongda Fluid Control Co., Ltd. has established itself as an industry-leading manufacturer of high-precision brass valves, fittings, and complex HVAC system components. With over two decades of engineering excellence, we specialize in the complete lifecycle of product design, advanced R&D, casting, machining, and strict quality control.
Our product lines are strategically focused on the mid-to-high-end markets of North America, Europe, and Asia. Highlighting environmental sustainability, lead-free brass formulations, and zero-leakage configurations, our designs are preferred by engineers globally. Under our premium brand Cokaren, we promise to "keep flowing, keep warming," providing global households and commercial facilities with robust, highly efficient hydronic and potable water system components.
A union check valve is an essential device used to restrict liquid or gas transmission to a single path. By integrating a union connection into the check valve body, piping designers can perform maintenance, inspection, and replacement without dismantling large sections of the piping network. This feature is particularly valuable in space-constrained industrial zones or high-purity fluid loops.
Engineered with precisely calibrated stainless steel springs, our valves feature an ultra-low cracking pressure. This design minimizes energy expenditure and mitigates pressure drops in high-capacity supply manifolds.
Manufactured using premium CW617N, DZR (Dezincification Resistant), or lead-free brass formulations. These materials comply with strict international drinking water codes, preventing heavy metal contamination.
Equipped with high-performance EPDM or Viton O-rings to ensure a secondary bubble-tight seal under varying temperature fluctuations, safeguarding systems against destructive fluid backflow.
As global industries move toward automation and reduced carbon emissions, Yuhuan Yongda is investing heavily in next-generation material science and smart valve technology. Our R&D division is focused on incorporating sensor assemblies directly into union check valve chambers, allowing real-time pressure, flow rate, and wear monitoring.
Additionally, we are exploring thin-film diamond-like carbon (DLC) coatings for the internal components of check valves. This coating drastically lowers friction coefficients and increases wear resistance in abrasive fluid environments. By matching these innovations with our standard brass forging capabilities, we prepare global distributors for future regulatory challenges.
Integrating specialized check and balance valves into critical building systems ensures thermal stability, safety, and energy efficiency.
Modern hydronic design requires precise coordination between energy sources and terminal distribution systems. Check valves play a key role in preventing thermal siphoning, protecting secondary loops, and maintaining correct flow direction across manifolds, mixing units, and boilers.
Serves as the primary line of defense in domestic plumbing systems, filtering out up to 98% of physical particulates and sediment.
Equipped with a solid spherical brass spool to control hot and cold water distribution cycles safely.
Automatically vents accumulated air pockets in heat pump water heaters, ensuring stable hydronic flow.
Precisely blends hot and cold return water streams, maintaining a constant supply temperature to protect downstream pipes.
Coordinates heating equipment adjustments across multiple zones for energy savings and comfort.
Distributes flow loops across underfloor circuits, working with zone actuators for local climate regulation.
With a state-of-the-art factory exceeding 45,000 square meters and an actual usable operations area of 80,000 square meters, Yuhuan Yongda handles all processes in-house. Our advanced production and testing infrastructure includes over 600 machine sets, highlighted by 80+ custom, multi-axis high-speed CNC centers.
Having key processes under one roof—from raw material forging to automated testing—protects our clients from supply chain disruptions. We run full spectrographic analyses of brass raw material batches to ensure composition and thickness consistency before they enter the casting molds.
Our facility uses 100% automated pressure testing lines, subjecting every check valve and HVAC manifold to high-pressure air and underwater bubble checks. This rigorous protocol allows us to achieve a zero-leakage rating on all critical deliveries.
We meet international compliance mandates, providing global supply chains with verified quality assurance and local technical support.
Our company operations are certified under the ISO 9001:2015 Quality, ISO 14001:2015 Environmental, and ISO 45001:2018 Occupational Health systems.
We provide full product certification files, material trace reports, and CE certificates to streamline local importing and compliance approvals.
We work closely with clients on customized port configurations, custom threads (NPT, BSP, G), specialized spring tensions, and private label markings.
Find answers to frequently asked technical questions regarding check valves, fluid systems, and custom ordering requirements.
Browse our complete selection of temperature control systems, mixing shunts, compression fittings, and heavy-duty gate valves.
