Yongda
Yongda
High-precision temperature control valves optimized for Bulgarian municipal district heating and industrial thermal networks.
Designed for precise ambient warmth regulation in district-heated residential properties across Sofia and Plovdiv. Durable brass architecture with integrated plastic card sleeve.
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Fully compliant with EU EN 215 standards, this thermostatic valve with a white plastic handle allows for optimal energy conservation in commercial building retrofits.
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Engineered for heavy-duty main pipeline isolation in municipal water distribution. High-tensile brass composition prevents corrosion under high-pressure parameters.
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Strict-tolerance threaded brass couplings suitable for sealing transitions in hydronic heating networks. Resistant to high-temperature thermal cycling.
Technical DataBulgaria's heating infrastructure is undergoing a massive transformation, driven by European Union climate mandates and the national objective to achieve high energy efficiency. In major municipal areas like Sofia, Plovdiv, Varna, and Burgas, local district heating operators—known as "Toplofikacia"—are aggressively modernizing aging thermal substations. A critical component in this transition is the installation of high-precision, automatic temperature control valves (TCVs) and thermostatic radiator valves (TRVs).
Under the European Energy Performance of Buildings Directive (EPBD), Bulgarian buildings are transitioning toward mandatory individual heat consumption allocation. Installing compliant, premium-grade brass temperature control valves at the radiator and manifold level ensures optimal heat distribution, reducing energy waste by up to 25% in multi-family apartments and public institutions. Consequently, engineering firms and commercial distributors in Bulgaria demand reliable, CE-certified flow control components that can withstand municipal water pressure fluctuations and local limescale challenges.
District Heating Retrofitting: Major urban centers are replacing old manual shutoff valves with smart, thermostatic control solutions to meet EU climate targets.
Strict Material Demands: European norms specify high-grade brass alloys (such as CW617N) for sanitary water systems, driving the replacement of substandard ferrous components.
Tourism & Hospitality Infrastructure: Constant demand for smart HVAC controls in Black Sea resorts (Burgas/Varna) and winter ski locations (Bansko) to manage seasonal occupancy energy loads.
Technical parameters for valves operating under European plumbing regulations and regional water composition profiles.
| Parameters | European Standard / Compliance | Yongda/Cokaren Capability |
|---|---|---|
| Material Alloy | EN 12164 / CW617N / CW602N (DZR) | 100% Forged CW617N Lead-Reduced Brass |
| Nominal Pressure | PN10 / PN16 / PN25 | Tested up to PN30 for transient spikes |
| Operating Temp. | -20°C to 120°C (Hydronic loop) | -30°C to 130°C stability |
| Thermostatic Standard | EN 215 (TRV Certification) | Certified low-hysteresis sensor elements |
| Thread Profile | ISO 228-1 (Parallel Threads) | Precision CNC-machined G-threads |
In Bulgaria, varying groundwater profiles in regional aquifers contain higher concentrations of carbon dioxide and calcium, which can accelerate dezincification in low-quality brass valves. Our manufacturing facility strictly utilizes premium **CW617N brass**, an EU-standard alloy containing balanced copper and zinc with restricted lead parameters. This ensures high structural integrity and resistance to stress-corrosion cracking.
For drinking water applications and systems exposed to high oxygen levels, we offer **CW602N Dezincification Resistant (DZR)** brass bodies. These advanced alloys prevent the leaching of zinc from the alloy matrix, keeping the structural frame of the valve intact over decades of heavy service. Combined with high-grade EPDM O-rings and double-stem seal designs, we guarantee a zero-leakage threshold.
A complete breakdown of our professional HVAC, filtration, and water-mixing technology designed to safeguard municipal pipelines.
Optimized manifold frames for balanced water routing across commercial zones.
Forged connectors providing robust, vibration-tolerant piping joints.
Standard interfaces matching global thermostatic smart heads.
The first line of defense in domestic water sanitation, filtering 98% of pipeline impurities.
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Corrosion-proof manual venting components for terminal radiator ends.
Controls hot and cold water in boilers with a precision-ground spherical brass spool.
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Facilitates fast, clean evacuation of water during winter maintenance cycles.
Automatically discharges excess air in heat pumps to prevent airlocks and pump wear.
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Blends cold return and hot feed lines to stabilize floor heating supply temperatures.
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Digital LCD interface linking radiant manifolds to smart automation protocols.
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Manages flow parameters, filters contaminants, and monitors localized temperature pressure.
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Premium multi-port solid brass distribution block for zoning underfloor systems.
Learn More →Why leading European distributors partner with Yuhuan Yongda Fluid Control Co., Ltd.
Founded in 1996, Yuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) is located in the legendary "China Valve Capital" – Yuhuan, Zhejiang. Spanning a factory area of over 45,000 square meters, with a total usable area of 80,000 square meters, we manage the complete manufacturing lifecycle, from raw material formulation to final testing.
Equipped with more than 600 sets of advanced production and testing hardware—including over 80 sets of specialized high-precision CNC machine tools—we ensure strict adherence to micro-tolerances. Our vertical integration allows us to offer flexible OEM/ODM capabilities, providing Bulgarian engineering customers with custom brand engraving, customized packaging, and optimized thread layouts.
Our newly established brand, Cokaren, represents our commitment to modern, refined appearance and superior build quality. Operating under the brand promise "Keep flowing, keep warming," we provide reliable fluid dynamics that keep systems warm and safe.
Our facilities are fully certified under global management frameworks, including ISO 9001:2015 (Quality Management), ISO 14001:2015 (Environmental Stewardship), and ISO 45001:2018 (Occupational Health & Safety). Every batch of temperature control valves leaving our dock undergoes pressure testing, ensuring our strict policy of "Fine work, no leakage" is met.
For Bulgarian buyers, this means hassle-free customs clearance and compliance. Our products meet the necessary European CE directives. Through our dedicated export office, we coordinate freight routes to key ports like Varna and Burgas, as well as land transport solutions directly to distribution depots in Sofia and Plovdiv. We provide full transit documentation, custom packaging configurations, and engineering drawings for project approvals.
A wider selection of brass terminal fittings, control valves, and distribution manifolds for Bulgarian project tenders.
Perfectly calibrated soldering sockets for copper plumbing. Ensures leak-proof joints under thermal fluctuations.
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Robust compression design allowing swift connection of PEX tubing in local radiant heating lines.
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Protects pressurized boilers and storage tanks by releasing overpressure automatically.
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Combines polymer safety with a robust brass mechanism, tailored for fusion-welded networks.
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Multi-port distribution unit that optimizes hydronic balancing for underfloor layouts.
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Compact isolating valve perfect for cramped utility closets and point-of-use appliances.
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Prevents backflow in commercial systems, protecting municipal supply lines.
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Essential end plug for manual venting, preventing pocketed air locks in radiant systems.
Technical DataAdditional specialized product references preserved for regional HVAC architects and procurement directors.
Durable brass plug designed for system drain points and manifold isolation ends.
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Large LCD display boiler linkage thermostat for optimized room heating schedule management.
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Configurable 2 to 10 ways options for managing multi-zoned heating structures.
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Forged CW617N brass compression elbow for reliable directional piping changes.
Technical DataProviding clear answers to technical, commercial, and regulatory queries from Bulgarian heating professionals.
Get in touch with our engineering export department today. Request custom pricing, catalog details, material test certificates, or physical samples for your next district heating tender.
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