Yongda
Yongda
Explore our elite portfolio of high-precision brass components, hot water floor pipelines, and flow regulators engineered for global industry standards.
Advanced radiant heating oxygen barrier PEX/PERT piping solutions for domestic comfort.
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Durable, leak-proof compression coupling optimized for polyethylene distribution piping networks.
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Precision motorized flow control solutions for automated fluid management circuits.
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Industrial shut-off globe valves engineered with premium brass and ergonomic handle systems.
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Tee structural connections with precision BSP/NPT threaded profiling for diverse tubing.
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Space-saving fluid diversion components designed for sanitization and bathroom applications.
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European-compliant direct line coupling unions offering quick installation and high sealing.
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End unit air purging tail accessories designed to eliminate airlocks in hydronic manifolds.
View DetailsYuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) was founded in 1996 in Yuhuan, Zhejiang—widely recognized as the "China Valve Capital." As an integrated global manufacturer, the company has dedicated nearly three decades to product design, materials formulation, precision machining, and distribution systems optimization.
Our product categories are divided into three high-performance portfolios: brass valves, industrial fittings, and HVAC distribution components. Positioned as premium products, they combine eco-friendly materials with strict lead-free or low-lead specifications, making them the preferred components for infrastructure and heating networks across North America and Europe.
Leveraging our newest brand, Cokaren, we are championing a strategy focused on refined aesthetics, superior materials composition, and comprehensive technical support. Guided by our brand promise, "Keep flowing, keep warming," Cokaren delivers comfort, safety, and fluid system integrity to modern residential and commercial architectures.
A comprehensive engineering assessment of check valves, clapper mechanics, dynamic sealing parameters, and future development paradigms.
Modern clapper check valves operate on differential pressure principles. The internal clapper plate swings or pivots relative to an seat axis. Our R&D focuses on minimizing disc travel distance, optimizing seat angle geometry, and reducing pressure drop and energy loss. Precision-engineered hinges prevent turbulence and premature structural wear.
We work with DZR (Dezincification Resistant) CW602N, lead-free HPb59-1 brass, and EN 12165 compliant forging stocks. These materials prevent stress-corrosion cracking in complex municipal water chemistries. Seats are fitted with virgin EPDM or Viton gaskets, ensuring bubble-tight shut-off across temperature extremes from -20°C to 120°C.
Aligning with Industry 4.0 trends, Yongda's future roadmap features IoT-enabled clapper positioning sensors and flow trackers. By embedding non-intrusive proximity micro-switches within the brass body housing, building automation systems receive real-time flow/no-flow signals, lowering manual maintenance costs.
| Feature / Parameter | Standard Brass Clapper Check Valves | Yongda Premium Brass Valves (Cokaren Series) | Key Performance Impact |
|---|---|---|---|
| Alloy Base Formulation | Standard HPb57-3 Brass | DZR Brass (CW602N) & Lead-Free CW617N | Extended lifespan in corrosive & potable water networks |
| Dynamic Testing Pressure | 1.6 MPa (PN16) limits | Tested to 2.5 MPa (PN25) margins | Prevents rupture during fluid water hammer anomalies |
| Clapper Sealing Interface | Metal-to-Metal surface contact | Vulcanized EPDM / Viton Soft Seal Rings | Zero-leakage, backflow protection at low pressure differentials |
| Machining Precision | +/- 0.05 mm standard tolerances | CNC Automated machining within +/- 0.01 mm | Less valve friction, lower turbulence, and quiet operation |
At Yuhuan Yongda, we run our business on four core principles: Struggle, Enterprising, Pragmatic, and Innovative.
Our operation is built on a clear quality standard: "Fine work, no leakage." By optimizing production capacity and worker safety, we align our company’s growth with the long-term success of our workforce.
Our quality management policy goes beyond basic assembly checks. Every valve is subjected to hydrostatic and pneumatic testing procedures to guarantee long-term performance under pressure. This commitment helps us maintain a 99.8% customer satisfaction rate across our international markets.
Providing integrated flow management technology for global mechanical projects, modern residential buildings, and municipal utilities.
Our manifolds, hydraulic separators, and mixing shunts work together to keep hydronic radiant heating systems balanced. They regulate water supply temperatures to prevent pipe damage and increase heating efficiency.
We supply a complete line of high-performance air venting assemblies, boiler safety valves, and automatic water makeup systems to keep large-scale commercial boiler rooms operating safely and reliably.
We provide lead-free brass ball valves, check valves, and stop valves to secure municipal feed systems. These products prevent cross-contamination and ensure drinking water safety.
An overview of our mechanical systems designed to manage water purification, pressure drop balance, and heating flow rates.
The first line of defense in domestic water sanitation, removing up to 98% of sediment and physical piping impurities.
Controls hot/cold water supply connections on central heating boilers, equipped with a durable spherical spool.
Automatically discharges trapped air bubbles in high-temperature air source heat pumps to prevent airlocking.
Precisely mixes return water with supply lines to maintain stable indoor delivery temperatures.
Integrated electronic control unit that adjusts valves and manifolds based on ambient temperature sensors.
Multi-functional valve assembly with built-in pressure monitors and sediment strainers for water loops.
Distributes water flow to individual room loops, allowing for precise room-by-room zone balancing.
Our manufacturing facility spans over 45,000 square meters (with 80,000 square meters of total usable floor area), housing 600+ advanced production and testing machines. This includes 80+ high-precision specialized machine tools, allowing us to maintain tight dimensional control across our product lines.
Our factory utilizes semi-automated hot forging presses, multi-axis CNC processing centers, and customized assembly lines. By keeping forging, machining, plating, and testing under one roof, we can adapt to fluctuating raw materials costs and maintain stable lead times for our clients.
This vertical integration also supports our extensive OEM and ODM business. We can develop custom products according to client blueprints, starting from mechanical design and raw material sourcing up to certified pressure testing.
Providing tested and certified flow control components that comply with global plumbing and environmental regulations.
We keep our facility aligned with standard quality and environmental frameworks. This enables consistent operations and reliable products.
Our brass valves, straight unions, and radiant HVAC modules carry full European market approvals, ensuring smooth imports.
We design and manufacture products to meet the lead-free requirements of North American potable water plumbing codes.
Providing clear logistics, reliable material supply, and custom production capacity for global distributors and OEMs.
| Procurement Stage | Technical Process & Standards | Customer Service Support |
|---|---|---|
| Inquiry & Specifications | We analyze technical drawings, chemical compositions, and flow requirements. | Detailed quotation, estimated lead times, and engineering feedback. |
| Pre-Production Samples | We cast, forge, and machine initial samples in-house using production tooling. | Dimensional inspection reports and physical samples sent for approval. |
| Volume Manufacturing | Automated CNC machining, multi-stage forging, and ultrasonic cleaning. | Routine production updates and visual QC inspections. |
| Quality Control Testing | We subject every valve to air-under-water shell and seat pressure testing. | Quality reports and material test certificates available upon request. |
| Logistics & Shipping | Secured packaging designed to protect threads and finish during transit. | Export customs documentation and tracking support to destination ports. |
Get authoritative answers regarding clapper check valves, installation standards, material selections, and sourcing.
Explore our range of multilayer pipes, connection adapters, venting assemblies, and mixing systems designed for commercial and residential fluid systems.
Multi-layered composite pipe offering high strength, thermal resistance, and gas-tight performance.
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Easy-to-install socket fittings manufactured to precise tolerances for leak-free joins.
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Maintains balanced pressure and flow rates between primary boiler and secondary heating loops.
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Durable brass adapters designed for connecting different thread types and copper tubing sizes.
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Automatic air vent designed to remove pockets of air from hot and cold water pipe networks.
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Flare connection fittings certified for high-pressure gas, fuel, and liquid refrigerant lines.
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Provides a secure end seal for hydronic manifolds, with built-in air vent capability.
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Centralized control hub for managing zone thermostats and thermal actuators in radiant heating systems.
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