Yongda
Yongda
High-reliability HVAC controls, flow-balancing units, and precision-forged fittings manufactured to global standards.
Yuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) was founded in 1996 and is strategically located in the heart of the "China Valve Capital" – Yuhuan, Zhejiang. Over the course of nearly three decades, the company has consolidated its status as a premier, professional plumbing valve enterprise, integrating product design, original development, state-of-the-art production, and global commercialization under one roof.
Yongda's extensive catalog is categorized into three primary pillars: high-grade brass valves, advanced plumbing fittings, and HVAC system technologies. Our core focus centers on mid-to-high-end international market segments, engineering products that prioritize environmental protection, structural durability, and optimal hydronic control. Today, these solutions are widely adopted in key regions such as North America, Western and Northern Europe, and beyond.
Strategic investment in smart manufacturing ensures maximum throughput and tight quality assurance.
Operating with a total factory footprint of 45,000 square meters—translating to a usable space of over 80,000 square meters—our production plant contains more than 600 sets of advanced manufacturing and testing devices, including 80+ dedicated special-purpose CNC machine tools. This capacity enables the fulfillment of complex ODM and OEM requirements for global projects.
To better serve modern high-end architectural systems, the company introduced Cokaren, a specialized brand committed to the development of components featuring refined product aesthetics, close-tolerance engineering, and premium durability. Cokaren operates on a simple, yet profound brand philosophy: "Keep flowing, keep warming."
By focusing on details like lead-free brass formulations, smart integration with underfloor heating systems, and user-centric designs, Cokaren has successfully transformed water systems. The goal is to provide a reliable, long-lasting performance that enhances comfort in domestic, commercial, and industrial facilities globally.
Guided by continuous optimization and strict adherence to international safety and quality standards.
Struggle, Enterprising, Pragmatic, and Innovative. We continuously align company expansion with personal employee development and technological advancement.
"Fine work, no leakage." 100% of our products undergo high-pressure hydraulic tests and low-pressure pneumatic tests to guarantee zero-defect field installation.
Yongda maintains three major systems: ISO9001:2015 (Quality Management), ISO14001:2015 (Environmental Stewardship), and ISO45001:2018 (Occupational Health & Safety).
An in-depth look at how lead-free regulations, smart building controls, and advanced alloy systems shape industrial procurement.
Industrial valve procurement has shifted focus toward material safety and environmental compliance. Historically, brass components utilized small amounts of lead (Pb) to improve machinability during the forging and turning processes. However, modern directives such as the Safe Drinking Water Act (SDWA) in the United States, NSF/ANSI 61, and European Union RoHS regulations mandate lead levels in components wetted by drinking water to be less than 0.25% weighted average.
Yongda has proactively addressed these regulations. We utilize specialized lead-free alloys and dezincification-resistant (DZR) brass (such as CW602N, CW617N, C37700, and low-lead UNS C27450). These materials prevent the structural failure known as dezincification, where zinc selectively leaches out of brass in aggressive water conditions, leaving a porous, weakened copper shell that is highly prone to structural collapse and high-pressure blowouts.
Modern building services rely on zoning systems to maintain efficient heating and cooling distribution. The integration of Underfloor Heating Manifolds, water-mixing shunts, and automatic air-vent valves forms the core of smart hydronic management. This structure ensures that energy-dense fluid is delivered to individual zones only when a thermal actuator receives a signal from a room thermostat.
In this context, the role of the Isolation Ball Valve is critical. These valves provide bubble-tight shutoff during system maintenance, balancing adjustments, or component replacement. High-performance isolation valves must maintain low operating torque, have a blowout-proof stem design, and integrate double O-ring seals. This prevents thermal degradation from continuous exposure to high-temperature hydronic water (ranging from 35°C up to 95°C in residential boiler lines).
For industrial buyers, sourcing valves from OEM manufacturers requires clear product specifications. A standard RFQ (Request for Quote) typically calls out several parameters:
An engineered system schematic showcasing how filtration, isolation, bypass controls, and smart zoning operate in modern mechanical rooms.
High-pressure isolation and throttling.
Ensures one-way flow containment.
The first line of defense in domestic water sanitation, can filter 98% of impurities in the pipeline.
Heavy duty brass distribution pipe.
Used to control the inflow and outflow of cold water and hot water in the boiler, with Spherical spool.
Limits flow to protect heat exchangers.
Used to discharge excess air in the air source water heater to ensure stable operation of the equipment.
Exhaust discharge port and system drain.
Monitors water pressure in real time.
Balances different zone flow volumes.
Used to mix cold and hot water in pipes, stabilizing temperature, protect pipeline.
Isolates loops during structural repair.
Regulates overall water loop heat.
Combine all the equipment to adjust the room temperature.
Used to filter and discharge impurities in the pipeline, control the switch of the back-end manifold, measure temperature and water pressure.
Distribute water flow to various rooms Combine all the equipment to adjust the room temperature.
Designed for industrial integration, long mechanical life cycles, and high thermal capacity.
One of the outstanding features is the integrated mesh strainer, protecting downstream plumbing from debris.
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Manual and thermostatic control configurations designed to manage regional radiator lines.
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Combines temperature sensor signals to dynamically blend return water into hydronic supplies.
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Forged brass main distribution body with micro-adjustable flowmeters for hydronic circuits.
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Heavy duty outdoor utility brass valve body with wear-resistant stem packaging.
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Solid brass wedge and full port design for minimal pressure drop in main pipeline systems.
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Custom length copper and brass tailpieces for residential and commercial meter integration.
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Precision machined barbs providing secure connection points for flexible piping applications.
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Brass forged piston design for pressure reduction and multi-directional flow switching.
Featuring external threads and robust safety water stop locks to prevent accidental leakage.
Constructed of forged brass, providing a leak-free junction for heavy industrial hoses.
Industrial-grade flow pipe fittings designed for aggressive cycles in fluid plants.
Dual-function pressure mitigation and absolute downstream line isolation.
Electroplated finish with manual lockout keys for public utility installations.
Heavy-duty cast valve featuring NPT thread ends for direct line isolation.
Combines check valve mechanism with a high-capacity brass T-strainer mesh.
Inline filtration layout targeting scale and solid particulate removal.
Maintains system prime and filters incoming fluids in sump and tank lines.
Direct internal-thread structure ensuring zero fluid backflow.
Underfloor manifold mixing configuration with integrated pump flange controls.
Maintains set water temperatures by recirculating loop return water.
Smart heating station control loop balancing valve assembly.
Relieves manifold pressure spike when multiple actuators shut down.
Manual purge plug designed for structural manifold end ports.
Continually bleeds trapped micro-bubbles from the water distribution lines.
Heavy-duty air purger for boiler systems and large mechanical distribution groups.
Combined automatic exhaust and physical drain port for floor manifolds.
Engineered brass mechanical joint system for medium density polyethylene lines.
BSP and NPT thread adapters designed to withstand high pressure spikes and structural loads in hydronic distributions.
Expert answers addressing the primary design and procurement concerns of engineers and OEMs.
Complete your mechanical room designs with our fully-compatible line of plumbing fittings, thermostats, and radiator control valves.
