Yongda
Yongda
Explore our premium product line manufactured for global performance and durability.
In commercial, industrial, and residential fluid control systems, the prevention of reverse flow—commonly referred to as backflow—is a fundamental safety and functional requirement. A check valve disc acts as the central mechanism within a non-return valve, responding dynamically to differential pressures within the pipeline to allow flow in only one direction.
Under the strict guidelines of global safety authorities, including the European Union's Pressure Equipment Directive (PED), the disc component must survive millions of cycles without material fatigue, erosion, or dimensional distortion. When selecting a check valve disc manufacturer and exporter, engineering and procurement professionals must look beyond surface dimensions. Performance is dictated by raw material purity, precision hot forging, elastomer bonding compatibility, and hydraulic profiling to minimize head loss.
CE Certification guarantees the disc is structurally evaluated to handle specific pressure thresholds (PN16/PN25) and complies with PED 2014/68/EU standards for ultimate safety.
Precision contoured discs decrease fluid resistance, mitigating pressure drop across the valve, which directly reduces pump energy requirements and system wear.
Integrating high-temp EPDM, FKM (Viton), or NBR vulcanized layers on the disc ensures perfect seating even under micro-differential pressures, preventing water hammer damage.
Yuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) was founded in 1996, and is located in the widely recognized "China Valve Capital" – Yuhuan, Zhejiang. As one of the leading professional plumbing valve enterprises, the company focuses closely on product design, development, production, and global sales.
Our specialized product portfolio is structured across three core categories: brass valves, fittings, and HVAC products. Positioned as mid-to-high grade components, they highlight clean environmental protection and robust mechanical reliability, earning strong positioning in North American and European markets.
To serve our customers, we operate a production facility spanning over 45,000 square meters, with an actual usable floor area reaching 80,000 square meters. Equipped with more than 600 sets of advanced manufacturing and testing devices (including 80 sets of specialized machine tools), we meet complex customization needs for international projects.
As our newly established premium brand, Cokaren is dedicated to delivering highly refined finishes and outstanding system lifespan. Grounded in the promise of "keep flowing, keep warming", Cokaren water accessories ensure safety, heat distribution efficiency, and comfort in modern homes globally.
The foundation of our engineering process is represented by the strict guideline: "Fine work, no leakage." This target drives our everyday culture of Struggle, Enterprising, Pragmatic, and Innovative engineering. By prioritizing the client's design standards, we secure the balance between corporate capabilities and employee welfare.
Every batch of check valve discs and HVAC manifold components undergoes structural verification. To guarantee compliance in hazardous, pressure-bound applications, our manufacturing plant has achieved the following certifications:
Hydronic energy distribution requires balanced control, pressure management, and micro-filtration. Modern commercial distribution layouts integrate check valves and control elements to prevent thermodynamic short-circuiting and heat loss.
Assures fluid stabilization at the manifold inlet.
Quick shutoff valve for distribution lines.
The first line of defense in domestic water sanitation, filtering 98% of impurities in the pipeline.
High temperature brass thread joint.
Used to control the inflow and outflow of cold water and hot water in the boiler, with Spherical spool.
Corrosion-resistant copper-nickel connection.
Discharges excess air in the air source water heater to ensure stable operation of the equipment.
Underfloor heating primary loop distributor.
Heavy duty brass air elimination system.
Stabilizes hydronic pressure loops in dynamic systems.
Used to mix cold and hot water in pipes, stabilizing temperature, protecting pipeline.
Connects mixing valves directly to main loops.
Secures thermal sensors within high-pressure flow paths.
Combines all the equipment to adjust and maintain target room temperature.
Filters and discharges impurities in the pipeline, controls the switch of the back-end manifold, measures temperature and water pressure.
Distributes water flow to various rooms and combines all equipment to adjust the room temperature.
The engineering landscape for non-return valves is shifting toward smart management, higher thermal tolerances, and environment-friendly materials. Industrial check valve discs are no longer simple static barriers; they are engineered profiles built for optimal fluid performance.
Transitioning from standard brass compositions to Dezincification Resistant (DZR) Brass and Lead-Free Alloys (meeting California AB1953 and European Drinking Water Directives). This prevents leaching in potable water networks and limits structural breakdown in high-salinity media.
Utilizing computational fluid dynamics (CFD) to analyze turbulence zones behind the check valve disc. Modifying disc curvature reduces fluid drag by up to 18%, increasing energy performance across municipal water networks.
The next generation of heavy-duty check valves includes embedded piezoelectric sensor cavities on the disc structure to monitor acoustic waves, detecting cavitation and predictive wear in real-time.
Our facility is situated in Yuhuan, Zhejiang—the manufacturing hub of international valve hardware. Through deep integration of regional supply chains, we maintain competitive costs while keeping lead times short and quality standards high.
With more than 80 sets of specialized CNC machine tools and automated hot forging presses, the dimension tolerance of our brass check valve discs is maintained within +/- 0.02 mm, ensuring complete interchangeability.
Quality assurance begins in our material testing lab. Every batch of raw brass rod is inspected using optical emission spectrometers to verify copper and lead content before hot forging begins.
Proximity to major deep-water ports (Ningbo and Shanghai) ensures swift, reliable global export operations. Backed by experienced logistics teams, we handle customs clearance and documentation smoothly.
B2B buyers, distributors, and engineering contractors need a reliable partner capable of matching specific pressure, temperature, and fluid demands. Yongda Fluid Control supports complex customer requirements through custom packaging, raw material compliance certifications, and flexible design modifications.
Our engineers work directly with OEM buyers to develop custom check valve disc assemblies. We can assist in sizing spring forces, selecting backing polymers, and preparing submittals for local approvals such as WRAS, DVGW, and NSF/ANSI-61.
Features inline strainers to capture system debris before it reaches sensitive instrumentation.
Manual temperature regulation designed for consistent domestic hydronic heating.
Maintains target temperatures by recirculating cool return water into the hot water inlet loop.
Multi-port heavy wall manifold designed for stable heat distribution across radiant zones.
Corrosion-resistant exterior utility valve with precision mechanical shutoff.
Heavy duty construction for low pressure drop and full bore isolation flow paths.
Corrosion-resistant copper-nickel connection lines designed for municipal utility installations.
Heavy duty threaded hose adapters manufactured for industrial fluid conveyance networks.
Get answers to critical technical questions regarding CE certification, check valve disc applications, and manufacturing processes.
CE marking indicates that the valve assembly complies with the European Pressure Equipment Directive (PED 2014/68/EU). It guarantees the check valve disc has undergone stress testing, material certification, and hydro-static burst pressure tests to ensure it will not fail structurally under nominal pressure limits.
Brass (such as HPb59-1 or CW617N) and bronze alloys offer excellent corrosion resistance against hot water and steam, easy machinability, and superior mechanical wear properties. They prevent scale buildup on sealing seats, which ensures long-term tightness.
Spring-loaded check valve discs close quickly when forward flow stops, preventing the fluid column from reversing direction. This fast shutoff eliminates the sudden pressure waves known as water hammer, safeguarding boilers, pipe joints, and instrumentation from physical shock.
Cokaren plumbing accessories and manifolds are built to perform reliably at temperatures ranging from -20°C up to 120°C, depending on the internal elastomeric seal selected (EPDM, FKM, or NBR). This covers all typical residential heating and cooling demands.
Yes. Leveraging our design department and over 80 sets of specialized machine tools, we provide complete ODM/OEM services. We manufacture check valve discs to custom diameters, seat thicknesses, spring pressures, and alloy formulations based on customer blueprints.
Premium components engineered for long-term system integrity and reliable performance.
