Yongda
Yongda
Browse our featured selection of high-performance components, including thermal actuators, compression fittings, and specialized brass boiler valves. These products reflect our deep technical commitment to reliability, structural safety, and long-term operating durability.
In the global theater of modern civil, commercial, and industrial plumbing architecture, ball and cock systems (frequently designated under standard industry terms as brass ball valves and shut-off cocks) constitute the critical foundation of pressure control, flow separation, and distribution isolation. From high-pressure steam distribution grids in northern Europe to localized underfloor hydronic heating loops in North America, the stability of plumbing systems relies heavily on the engineering tolerance of these compact brass fittings.
As dynamic B2B procurement cycles shift away from off-the-shelf catalog products toward highly specialized, purpose-configured components, ODM (Original Design Manufacturing) solutions have emerged as the primary vehicle for engineering acquisition. Modern B2B buyers no longer simply request a generic pricelist; they demand verified metallurgical compositions, precision cycle tolerances, international environmental certifications, and custom mechanical layouts tailored to their specific system packages. This document presents a comprehensive analysis of modern ODM brass valve procurement, engineering standards, and cost-benefit frameworks.
Strict drinking water laws (like US NSF/ANSI 372 and European REACH mandates) are changing how brass alloys are formulated. Modern ODM factories now use advanced lead-free and Dezincification Resistant (DZR) brass alloys. These materials maintain excellent hot-forging characteristics while preventing brass corrosion in environments with varying water chemistry.
Yuhuan Yongda Fluid Control Co., Ltd. (formerly known as Yuhuan Yongda Plumbing Co., Ltd.) was founded in 1996 and is situated in the globally recognized "China Valve Capital" – Yuhuan, Zhejiang Province. As a pioneering force in the valve manufacturing sector, Yongda has developed an integrated operations model encompassing conceptual product design, mechanical engineering development, advanced manufacturing, and global sales channels.
Our expansive product portfolio is organized into three specialized divisions: premium brass valves, engineered plumbing fittings, and integrated HVAC system components. We focus on mid-to-high-end global markets, building our reputation on high-grade environmental safety, raw material tracking, and strict dimensional accuracy. Our products are widely used by B2B distribution networks, OEMs, and installers across North America, Europe, and Asia.
Yongda operates from a state-of-the-art industrial complex with a physical footprint exceeding 45,000 square meters, yielding an actual operational floor space of over 80,000 square meters. Guided by strict lean manufacturing principles, this facility is designed to reliably handle high-volume B2B orders while maintaining the flexibility needed for custom engineering projects.
To better serve high-end international applications and custom design demands, Yongda introduced our specialized brand, Cokaren. Rooted in the brand promise of "keep flowing, keep warming", Cokaren is dedicated to designing hydronic heating accessories and high-performance valves that deliver exceptional thermal comfort and process safety to modern homes and commercial spaces.
Cokaren focuses on refined engineering aesthetics, strict quality benchmarks, and custom-tailored customer service. Cokaren is key to our transformation from a large OEM components supplier to a dynamic global partner in custom fluid control engineering.
By leveraging our production infrastructure and automated testing lines, Cokaren delivers precision-forged components designed for severe operating conditions. These include high-pressure water hammers, extreme chemical treatments in heating lines, and rapid thermal cycling.
At Yuhuan Yongda, we run our factories under a clear guiding philosophy: Struggle, Enterprising, Pragmatic, Innovative. This drive for progress shows in every stage of our work, from selecting raw materials to fine-tuning our CNC machining workflows.
Our quality policy is direct and uncompromising: Fine work, no leakage. Because a single joint failure can compromise an entire building's hydronic layout, every production run undergoes 100% pneumatic pressure testing alongside regular metallurgical lab checks.
Our production facilities operate under a fully certified management system that meets three international standards:
Procuring custom brass ball valves and fittings involves navigating complex pricing structures. In international B2B sales, a basic, static pricelist is rarely enough for large projects. Commodity markets fluctuate, changing the costs of copper, zinc, and nickel. True procurement planning relies on understanding these dynamics to secure reliable, stable quotes.
Brass is an alloy composed primarily of copper and zinc. Industrial B2B quotes are typically calculated using a formula tied to the London Metal Exchange (LME) copper index. When purchasing ball and cock assemblies in large quantities, manufacturers lock in metal prices on the day of deposit confirmation to protect buyers from market volatility during the production cycle.
The difference between standard utility valves and premium HVAC components lies in machining precision. High-speed multi-axis CNC machines and automated transfer centers allow Yongda to deliver components with dimensional tolerances as tight as ±0.01 mm. This precision prevents leaks and simplifies field installations.
| Alloy Designation | Standard Reference | Copper (Cu) % | Lead (Pb) % | Primary Application Profile |
|---|---|---|---|---|
| CW617N | European EN 12164 | 57.0% - 59.0% | 1.6% - 2.5% | Standard hydronic heating systems, manifolds, general shut-off valves. |
| CW602N (DZR) | European EN 12165 | 61.0% - 63.0% | 1.6% - 2.2% | Corrosive water conditions, high-dezincification risk environments. |
| C37700 | American ASTM B124 | 58.0% - 61.0% | 1.5% - 2.5% | Heavy-duty forged components, high-strength commercial applications. |
| Lead-Free Brass | NSF/ANSI 372 | > 60.0% | < 0.25% | Potable municipal water supplies, public plumbing grids. |
Modern commercial and residential buildings require highly integrated heating and cooling layouts. Our energy distribution systems organize heating loops, filtration units, mixing stations, and smart controllers into a unified, high-performance network.
System Schematic: Interlocking valves, actuators, manifolds, and balancing units.
In hydronic loops, maintaining balanced flow rates across zones is essential for consistent warmth and energy efficiency. Our system combines automated air vents, mixing valves, and manifold arrays to ensure precise temperature control and protect equipment from water hammer damage.
The first line of defense in domestic water sanitation, filtering up to 98% of particulate impurities from incoming pipelines.
Controls cold and hot water inlets at the boiler block. Features a low-friction spherical brass spool.
Discharges air pockets in heat pump and water heater loops to maintain constant, efficient heat transfer.
Mixes hot and cold water streams to stabilize temperatures and prevent thermal shock in plastic pipe networks.
The central control unit. Integrates heating systems, actuators, and manifolds to regulate room temperatures.
Multi-functional service valve. Filters debris, discharges air, balances flow, and monitors temperature/pressure.
Distributes flow across rooms, providing individual thermal zones for residential floor heating loops.
Selecting the correct hardware for commercial HVAC systems requires a clear understanding of mechanical and physical properties. Low-quality brass, poor machining, or substandard sealing materials lead directly to leaks, pressure drops, and system failures. Below is a detailed look at the core design features of the Cokaren and Yongda product lines.
Forged brass valves offer superior performance compared to cast alternatives. The high-density forging process eliminates microscopic air pockets, resulting in a stronger body with high wall thickness. This construction allows our standard ball valves to easily handle pressure ratings of PN25 or higher.
A common failure point in ball valves is stem wear caused by constant cycling. Yongda uses double PTFE seat seals combined with EPDM O-rings. This combination ensures leak-free operation over thousands of cycles while keeping turning torque low.
As buildings move toward zero-emission targets, fluid control systems must become more intelligent and efficient. Yuhuan Yongda is actively investing in research and development to align our manufacturing capabilities with these emerging global trends.
Modern underfloor heating systems are transitioning from basic thermal actuators to smart units integrated with building automation systems. We are developing low-noise, energy-efficient actuators that support modbus communication and auto-balancing technology.
We are working to reduce the carbon footprint of our forging operations. By upgrading to induction billet heaters and recycling 100% of our scrap brass shavings, we ensure our production lines are both cost-effective and environmentally responsible.
Our engineering roadmap focuses on key performance updates:
Explore answers to common questions regarding technical specs, custom ODM orders, pricing models, and shipping terms.
Browse additional plumbing and heating components, including custom brass reduce nipples, thread fittings, and automatic air release valves. All products are manufactured in our ISO 9001:2015 certified facilities.
