Yongda Yongda

ODM Bohmer Valve Factories & Service

High-Precision Industrial Fluid Control Solutions, Advanced HVAC Systems, and E-E-A-T Certified Brass Valve Manufacturing

Company Profile

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 plumbing valve enterprise, we specialize in high-precision product design, metallurgical development, automated production, and global commercial sales.

Our core portfolio is divided into three major categories: brass valves, precision fittings, and HVAC control products. Positioned in the middle and high-grade global markets, our products emphasize environmental sustainability, lead-free compliance, and superior structural integrity, earning the trust of top-tier system integrators and distributors across North America, Europe, and Asia.

With a state-of-the-art facility spanning a factory area of over 45,000 square meters (and actual usable area reaching 80,000 square meters), our plant is equipped with more than 600 sets of advanced manufacturing and testing devices. This includes 80+ sets of dedicated multi-axis CNC machine tools, allowing us to implement bespoke ODM specifications for global procurement partners.

Yuhuan Yongda Fluid Control Factory Area
1996
Founded In
45,000+
Factory Area (㎡)
600+
Advanced Equipment Sets
20+
Exported Countries

Cokaren - Our Flagship Brand

Cokaren, the dynamic vanguard brand of Yuhuan Yongda, was established to fulfill international demands for high-aesthetic, ultra-durable control accessories. Representing our core design ethos, Cokaren bridges the gap between raw mechanical engineering and modern smart home integration.

"Keep flowing, keep warming" — Providing comfort, reliability, and precision temperature management to homes and industries worldwide.

Currently executing our global expansion strategy, Cokaren is fast becoming a household name in modern HVAC and distribution systems. We continuous to pursue strategic partnerships, technological enhancements, and localized customer service models.

Cokaren Brand Flow Control Systems

Macro Industry Solutions & Global Procurement Needs

How we address the stringent technical requirements of modern mechanical engineers and commercial supply chains.

Thermal Dynamics Optimization

Our solutions manage water density variation and minimize temperature spikes in district underfloor networks. Utilizing advanced thermostatic balancing technology, we eliminate system thermal fatigue.

Zero-Leakage Assurance

Our corporate quality philosophy is "Fine work, no leakage". Each brass valve undergoes 100% pneumatic-hydrostatic test cycles, securing safe fluid transport under high PN16/PN25 ratings.

Dezincification Resistance

Commercial buildings face aggressive water chemistries. Cokaren uses DZR Brass (CW602N / CW617N) containing corrosion inhibitors to prevent selective zinc leaching and premature structural failure.

Energy Distribution System Integration

Explore how our specialized system units connect seamlessly to maintain high energy efficiency and precise flow distribution.

Smart Flow Distribution

Modern residential and commercial architectures demand optimized energy distribution systems. By integrating manifold systems, thermostatic mixing units, and smart sensors, we enable intelligent heat mapping across distinct building sectors.

Our system operates seamlessly with air-source heat pumps, condensing boilers, and solar thermal loops. The mechanical components balance fluid resistance automatically, saving system pump energy up to 18%.

Energy Distribution System Schematic
Precision Testing Equipment

Corporate Culture & Quality Tenets

Culture: Struggle, Enterprising, Pragmatic, Innovative

Tenet: Customer first, Quality based

Quality Policy: Fine work, no leakage

We strive to build our technical capabilities and human capital, ensuring sustainable growth while focusing on environmental protection. We foster an ecosystem where company expansion and personal fulfillment work in unison.

Quality Certification Badges

Global Regulatory Compliance

To supply multinational corporations, we conform to three major ISO standards. These management frameworks guarantee robust industrial operations:

  • ISO 9001:2015: Quality Management System, securing raw material tracking to finished delivery inspection.
  • ISO 14001:2015: Environmental Management System, utilizing energy-saving recycling loops and lead residue treatments.
  • ISO 45001:2018: Occupational Health and Safety, ensuring safe conditions for all manufacturing personnel.

Technical Roadmap & Future Outlook

The convergence of mechanical precision with industrial Internet-of-Things (IoT).

Smart Flow & Electronic Actuation

Our current technological investments focus on building micro-actuators that communicate through Modbus, BACnet, or wireless protocols. These IoT-enabled control valves auto-adjust flow rates according to real-time temperature fluctuations, ensuring dynamic balancing in commercial green structures.

Lead-Free Metallurgy & Environmental Integrity

In response to global drinking water directives like NSF/ANSI 61 and Europe’s RoHS/REACH compliance guidelines, we are expanding our low-lead and lead-free bismuth/silicon-brass alloy programs. This ensures our forged components are safe for human health.

Technical Q&A & Support Guidelines

Providing expert answers to key purchasing and engineering queries concerning brass flow components.

Q: What grades of brass alloy do you use for high-temperature HVAC applications?
A: We primarily utilize CW617N, CW602N (Dezincification Resistant - DZR), and low-lead standard brasses. These alloys deliver the optimal balance of tensile strength, machineability, and protection against selective zinc leaching in closed-loop hydronic systems.
Q: How does Yuhuan Yongda guarantee a zero-leakage threshold on high-volume production?
A: Operating under the policy of "fine work, no leakage," we execute automated pneumatic leak tests on 100% of our production line. We also run destructive hydrostatic burst tests and cycle-resistance audits in our laboratories to confirm structural resilience.
Q: What customization (ODM/OEM) tolerances can your factory support?
A: Supported by over 80 sets of multi-axis CNC machine tools, we hold dimensional machining tolerances down to ±0.01 mm. Custom thread patterns (G, NPT, BSPP, BSPT) and logo embossments are tailored precisely to customer specification sheets.
Q: How do your mixing shunts and manifolds improve energy efficiency in underfloor heating systems?
A: By combining differential bypass loops with thermostatic mixing controls, they maintain stable delta-T configurations. This keeps pumps running at their peak efficiency zones, avoiding cycling and mechanical strain.