Yongda
Yongda
Engineered for extreme reliability, leak prevention, and comprehensive system protection.
An analytical breakdown of safety protocols, compliance, and material engineering.
In modern commercial HVAC, municipal water distribution, and heavy industrial settings, physical security is paramount. Lockable valves prevent unauthorized adjustments, water theft, and catastrophic pressure imbalances caused by manual tampering. Security-enhanced designs have transitioned from basic padlocks to complex magnetic, integrated keyed mechanisms.
Global regulatory bodies, including the EPA (Safe Drinking Water Act) in North America and EN standards in Europe, are strictly regulating heavy metal leaching. Leading brass valve manufacturers are driving material breakthroughs, shifting from traditional leaded brass to Eco-Brass (DZR lead-free alloys like CW724R), preserving high forgeability while eliminating toxic exposure.
IoT ecosystems demand hydronic balance monitoring. Lockshield valves and mixing shunts are increasingly integrated with digital actuators. Lockable controls ensure that once mechanical balancing is established, field-level changes can only occur through authorized digital overrides, protecting overall system efficiency and reducing energy consumption.
Delivering high-precision fluid control components to international markets since 1996.
Yuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) was founded in 1996 and is located in the prestigious "China Valve Capital" – Yuhuan, Zhejiang. As an industry-leading manufacturer, we focus on the integrated design, engineering development, precision manufacturing, and global sales of fluid control equipment.
Our comprehensive portfolio is structured across three core segments: brass valves, advanced pipe fittings, and HVAC distribution components. Positioned in the middle and high-grade global markets, our products highlight environmental sustainability, zero-defect durability, and excellent structural integrity, making them highly favored by industrial buyers across North America and Europe.
To maintain an edge in product design, we launched our signature brand Cokaren. Dedicated to providing refined appearances and premier performance, Cokaren's brand promise is simple: "Keep flowing, keep warming." We are continuously implementing advanced design paradigms to grow Cokaren into a world-class fluid technology brand.
We believe that manufacturing excellence stems from a balance of technical capability and strict quality control. Our operational guidelines are rooted in the core values of Struggle, Enterprising, Pragmatic, and Innovative. Under our strict quality policy of "Fine work, no leakage," we maintain exhaustive inspection regimens at every step of fabrication.
Yongda is fully certified under the most rigorous international standards, including:
How industrial automation translates into cost advantages without compromising precision.
The term "cheap" in modern fluid dynamics engineering is often misunderstood. Cheap lockable valves should not compromise safety. Instead, cost-efficiency must be derived from advanced production methodologies, raw material optimization, and robust logistics. Yuhuan Yongda achieves this optimization through three primary Factory 4.0 systems:
Standard casting is prone to microscopic air bubbles (porosity), which lead to high failure rates under stress. Yongda utilizes advanced hot forging processes across 80+ specialized CNC and multi-axis machines. This aligns the crystalline structure of the brass, providing maximum tensile strength and wall-thickness uniformity, allowing our lockable valves to withstand high pressures while utilizing optimized material profiles.
Every single valve undergoes automatic pneumatic and hydrostatic seal testing. Our proprietary "Fine work, no leakage" policy ensures that sealing materials, including premium PTFE seats and dual EPDM O-rings, are applied and calibrated with precision torque machines, eliminating human error from the assembly stage.
Situated in the "China Valve Capital" (Yuhuan, Zhejiang), Yongda benefits from a consolidated local supply chain. Direct access to raw brass smelting factories, eco-friendly plating suppliers, and testing laboratories reduces transit times and manufacturing overhead, a cost advantage we pass directly to our international buyers.
We strive to develop the company's capabilities and motivation, continuously improving the welfare of our employees while maintaining a strict standard of customer satisfaction. By investing in our team, we ensure that every valve leaving our 80,000 square meter facility complies with international standards, delivering reliable fluid control solutions worldwide.
Comprehensive control units for high-efficiency domestic and commercial heating systems.
Integrating water filtration, back-end manifolds, automatic air release systems, and mixing shunts into one cohesive thermodynamic distribution model.
First line of defense in domestic water sanitation, filters 98% of impurities in the pipeline.
Controls the inflow/outflow of cold and hot water in the boiler with a spherical spool.
Discharges excess air in air-source water heaters to ensure stable system pressure.
Mixes cold and hot water in pipes, stabilizing temperature and protecting pipelines.
Combines all equipment systems to dynamically adjust target room temperatures.
Filters pipeline impurities, controls manifold loops, and measures temperature/pressure.
Distributes water flow to various rooms, managing underfloor heating loops.
Engineered brass components for integrated building climate management.
Adapting flow security solutions to residential, municipal, and industrial spaces.
In multi-family residential projects or commercial buildings, balancing radiant heating systems is critical. Tenants adjusting individual loops can disrupt hydronic balance across the entire structure. Employing a lockshield brass radiator valve or lockable HVAC valve ensures that settings remain balanced, preventing cold spots and optimizing energy efficiency.
Outdoor bibcocks, public facilities, and municipal utility connections are vulnerable to water theft. Installing electroplated brass faucets with physical locks allows utility managers to secure connection points, preventing unauthorized water usage and protecting municipal fluid infrastructure.
Boiler rooms present high-temperature, high-pressure environments. Emergency drainage valves, air release units, and mixing shunts require strict operational security. Lockable handles prevent accidental operations that could lead to system depressurization or hot fluid exposure, supporting compliance with Lockout/Tagout (LOTO) protocols.
An overview of our core plumbing, HVAC, and industrial brass lines.
Combines isolation and filtration in a single forged brass body, protecting downstream components.
Manual and automatic options designed to manage flow rates based on thermal demand.
Manages water blending to maintain consistent distribution temperatures in underfloor systems.
Multi-port distribution manifold, designed for precise control across zoned hydronic loops.
Engineered outdoor faucet line, featuring freeze-resistant designs and long service life.
Heavy-duty linear flow control valve, optimized for low pressure drop and full-port flow.
Precision-threaded connectors and straight-run pipe extensions for municipal metering.
Corrosion-resistant fittings designed to comply with North American plumbing standards.
Technical answers regarding material properties, bulk procurement, and installation security.
Engineered components designed for high-efficiency underfloor heating, boilers, and industrial plumbing systems.
