Yongda
Yongda
Explore our foundational range of premium heating, ventilation, air conditioning (HVAC), and flow control components engineered for long-term reliable performance.
Modern refrigeration technology is undergoing a monumental paradigm shift driven by legislative environmental mandates (such as the EU F-Gas Regulation and the Kigali Amendment) and the demand for higher operating efficiencies. Ball valves, serving as primary isolation and maintenance points within vapor-compression and industrial hydronic lines, must adapt to tighter engineering parameters than ever before.
The rapid adoption of natural alternatives such as R744 (CO2) and R290 (Propane) demands redesigned mechanical sealing materials. Transcritical CO2 systems operate at pressures up to 120-140 bar, rendering standard brass compositions and low-spec seals obsolete. Next-generation valves must feature reinforced casings and specialized polymers to mitigate micro-leakages.
Fugitive emissions of refrigerants contribute directly to climate change and system inefficiencies. Using double O-ring stem arrangements, laser-polished micro-spheres, and reinforced virgin PTFE seats ensures a bubble-tight shutoff. This decreases operational wear and stabilizes system performance over decades of cycles.
Global regulatory bodies are limiting the lead content in alloys. Manufacturers must pivot to eco-friendly, lead-free brass (e.g., CW617N or CW602N Dezincification Resistant alloy) to ensure high tensile strength and prevent stress corrosion cracking in high-humidity cooling profiles.
Yuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) is located in Yuhuan, Zhejiang—the celebrated "China Valve Capital."
With more than 27 years of specialized expertise in product design, development, production, and exporting, we have positioned ourselves as a leading tier-1 provider of brass valves, fittings, and HVAC system components. Our premium products highlight the crucial advantages of environmental safety and long-term durability, favored heavily by contractors and distributors across North America, Europe, and Asia.
Our new brand, Cokaren, represents our commitment to refined product appearance, structural optimization, and excellent customer service. Guided by the brand promise of "keep flowing, keep warming," we strive to build a dynamic global enterprise offering world-class fluid solutions.
Industrial refrigeration and hydronic heating demand reliable, high-spec equipment. We supply engineered ball valves and manifold configurations that optimize thermal energy distribution while keeping system down-time to a minimum.
From supermarket display cases to central air conditioning plants, our valves manage refrigerant lines flawlessly under fluctuating ambient temperatures. Advanced forging ensures the body stands up to thermal stress and mechanical vibration.
Energy distribution manifolds are the core of modern hydronic underfloor heating systems. Integrated mixing shunts and thermal actuators balance water temperature dynamically, maximizing efficiency and residential comfort.
Equipped with specialized venting, safety pressure relief, and micro-filtration, our boiler manifolds protect domestic heating systems from scale, air pockets, and excess pressure spikes.
B2B procurement teams must manage risks associated with supply chain bottlenecks, poor raw material quality, and compliance failures. Yongda answers these concerns by providing:
Understand the difference between various brass materials utilized in our refrigeration and heating valve lines.
| Material / Specification | CW617N (Standard European) | CW602N (Dezincification Resistant) | Lead-Free Eco Brass (C46500) |
|---|---|---|---|
| Copper Content (%) | 57.0 - 59.0% | 61.0 - 63.0% | 59.0 - 62.0% |
| Lead Content (%) | 1.6 - 2.5% | 1.7 - 2.8% | < 0.25% (Safe Drinking Water Compliant) |
| Primary Application | General HVAC, Radiator Valves | Corrosive Water Lines, High-Humidity | Potable Water Systems, Global ODM Lines |
| Max Operating Pressure | PN25 - PN40 (Up to 40 Bar) | PN25 - PN40 (Up to 40 Bar) | PN25 (Up to 25 Bar) |
| Temperature Spectrum | -20°C to 120°C | -30°C to 150°C | -10°C to 110°C |
Our components are engineered to work in harmony, creating a secure loop from generation to terminal distribution.
A typical modern building utilizes a centralized heating or cooling source. Delivering this thermal energy efficiently to individual rooms requires a highly structured manifold and distribution station.
To support long warranties in industrial environments, our factory implements rigorous testing protocols across the entire production cycle.
All incoming brass bars are analyzed via optical emission spectrometers to verify chemical composition, ensuring compliance with EN 12164 and ASTM standards.
Automated temperature-controlled forging presses eliminate internal voids. Subsequent stress-relief heat treatments mitigate the risk of stress-corrosion cracking.
High-precision multi-axis rotary transfer machines process valve bodies in a single clamping step, preserving concentricity tolerances within 0.02mm.
Every refrigeration-grade ball valve undergoes nitrogen-helium mass spectrometer leak testing. This process detects micro-leakages far beyond the limits of standard bubble-dunk water tests.
Our manufacturing facilities operate under comprehensive international management frameworks. This structural compliance ensures we meet the standards of major global export markets:
As clean energy systems scale globally, we continue to research and develop next-generation fluid control equipment.
We are developing ball valve modules with embedded pressure and temperature sensors. These units communicate directly with building management software (BMS), enabling predictive maintenance and remote troubleshooting.
To support carbon dioxide cooling loops, we are extending the pressure limits of our brass ball valves up to 140 bar. These designs use modified forging shapes and high-density polymer seals.
We are expanding our product lines with bismuth-stabilized and silicon-stabilized lead-free brasses, ensuring compliance with future changes to international drinking water standards.
Get answers to common technical, design, and sourcing questions about our refrigeration and heating products.
Browse our range of safety relief valves, compression fittings, and automated actuation devices designed to protect system infrastructure.
