Yongda
Yongda
Direct supply from state-of-the-art facilities with tested reliability and certified material credentials.
Top-tier distributor manifold systems engineered for optimized zone control and dynamic hydronic balancing.
Heavy-duty brass gate valves built with high-torque tolerance and precision threaded interfaces.
Advanced digital temperature controllers for intelligent thermal tracking and radiant floor regulation.
Protective pressure bypass assemblies equipped with integrated manual or automatic brass air release systems.
Robust corrosion-resistant nickel-plated valves tailored for variable radiator networks.
Precision-formed metal bellows designed to absorb high-frequency thermal expansions and system vibrations.
Engineered to continuously purge trapped gas pockets from central heating circuits, protecting pumps from air locks.
Fast-response electrothermic actuators designed for seamless pairing with manifold circuits and smart control loops.
A technical assessment of fluid mechanics, non-return configurations, and global sourcing paradigms.
Wafer check valves, or non-return valves, are compact fluid control components installed between flanges. Unlike traditional swing check valves, wafer check valves feature a thin, space-saving profile that matches the standard flange dimensions. When fluid moves in the desired direction, the disc swings or slides open. When flow stops or reverses, system backpressure and spring assistance close the disc to prevent backflow.
These valves are preferred in municipal piping, high-rise HVAC water circulation, water treatment systems, and industrial chemical processing due to their short face-to-face dimensions, light weight, and ease of installation. The low pressure drop across the disc reduces energy consumption in pumping stations.
When selecting a supplier for critical infrastructure projects, procurement teams evaluate both product specifications and the manufacturer's operational capabilities. Enterprise buyers should confirm several key performance requirements:
The shift toward smart building automation and energy-efficient HVAC networks drives demand for reliable, low-pressure-drop check valves. In regions like North America and Western Europe, strict regulations on lead-free water infrastructure push manufacturers to refine brass alloys and develop innovative dual-plate check valve designs. As global infrastructure investments grow, partnerships with vertically integrated exporters in major manufacturing zones help reduce lead times and shipping costs.
Yuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) was founded in 1996 and is located in Yuhuan, Zhejiang—known as "China's valve capital." As a professional plumbing valve enterprise, Yongda focuses on product design, development, production, and sales.
The company's product line includes brass valves, fittings, and HVAC products. Positioned in the mid-to-high-grade segment, these products emphasize environmental compliance and are exported to North America, Europe, and other global markets.
Yongda's facilities cover a factory footprint of over 45,000 square meters, with an actual usable production area of 80,000 square meters. The plant operates more than 600 sets of production and testing equipment, including 80+ specialized machine tools, allowing the company to meet diverse customer specifications across more than 20 countries.
Cokaren is Yuhuan Yongda's premium brand, developed to deliver refined aesthetics and enhanced product performance for demanding fluid systems.
Cokaren's brand promise—"keep flowing, keep warming"—reflects its focus on reliable water system accessories that maintain comfortable home environments. The brand aims to grow steadily as a dynamic, customer-focused enterprise in the global valve market.
Culture: Struggle, Enterprising, Pragmatic, Innovative
Tenet: Customer first, Quality based
Quality Policy: Fine work, no leakage
Yongda maintains standardized quality control protocols to ensure reliable operation of its fluid control products. The manufacturing facilities have completed certifications under multiple international management systems:
This operational structure supports the company's commitment to delivering reliable, leak-free valves to commercial partners.
Integrated solutions for water filtration, temperature regulation, and flow control in modern HVAC networks.
Designed as a primary defense for domestic water sanitation, filtering up to 98% of pipeline impurities.
Equipped with a spherical spool to control the flow of hot and cold water inputs in boiler systems.
Releases excess air from air-source water heaters to support stable system operating pressures.
Blends cold and hot water to maintain stable temperatures and prevent thermal shock in distribution piping.
Central control unit designed to coordinate room temperatures across radiant heating zones.
Combines filtration, venting, temperature monitoring, and pressure regulation in a single valve body.
Distributes flow to individual heating loops and integrates with zoning controls to manage room temperatures.
Browse our catalog of brass ball valves, gate valves, and manifold system accessories.
Combines a standard flow shut-off ball valve with an inline mesh filter to protect downstream equipment.
Designed for manual adjustment of water heating loops to balance temperature profiles.
Balances incoming temperatures in hydronic heating networks using thermodynamic control principles.
Engineered brass manifold header built for balancing flow across floor heating zones.
Brass hose bibcock designed for outdoor water connections, offering high cycle life and freeze resistance.
Wedge-style brass gate valve designed for isolation control in plumbing and industrial pipelines.
Precision-threaded brass connection tubes designed for installing and aligning water meters.
Standardized brass hose fittings engineered for secure installations and vibration resistance.
An in-depth look at check valve design, material selection, and installation practices for engineering projects.
Dual-plate wafer check valves use two spring-loaded plates mounted on a central hinge pin. When forward flow begins, the plates open. When flow stops, the torsion spring closes the plates before reverse flow occurs, helping prevent water hammer.
Single-plate check valves use a single disc suspended from a top pin. They require lower opening pressures but can be more prone to water hammer in high-flow pipelines. Selecting the correct configuration depends on system pressure, flow rate, and piping layout.
Valve durability depends on choosing the correct body and seat materials:
Water hammer occurs when fluid in motion stops suddenly, creating shock waves that can damage pipes, joints, and pumps. Wafer check valves with spring-assisted closing discs help mitigate this by shutting before backflow can accelerate, protecting system components.
Technical and sourcing questions answered by our engineering and logistics teams.
Wafer check valves are significantly lighter and have shorter face-to-face dimensions, making them easier to install between standard pipe flanges. They require less space, reduce shipping costs, and often provide quicker closing responses, which helps prevent water hammer in dynamic piping systems.
Yes, brass wafer check valves with high-grade EPDM or PTFE seats are commonly used in heating, ventilation, and air conditioning (HVAC) applications. They handle hot water, chilled water, and water-glycol mixtures while resisting scale buildup.
Manufacturers conduct hydrostatic and pneumatic tests in accordance with standards like API 598 or EN 12266-1. The valve is pressurized from the inlet to test shell integrity and from the outlet to verify seat tightness.
Buyers should verify ISO 9001:2015 for quality control, ISO 14001:2015 for environmental management, and CE certification for European compliance. For drinking water systems, certifications like NSF/ANSI 61 or WRAS may be required to confirm lead-free material compliance.
Valve chatter occurs when a valve is oversized for the system's flow rate, causing the disc to flutter between open and closed states. This can be prevented by sizing valves based on actual flow rates and pressure drops rather than matching line sizes, and by ensuring proper spacing downstream from pumps and fittings.
Complete your procurement list with certified connection components and system accessories.
Standard and custom brass inline non-return valves manufactured to international dimensions.
Lead-free brass compression elbow adapters designed for 16mm and 20mm PEX tubing applications.
Heavy-duty brass ball valves with red, yellow, or blue handles to indicate gas, hot, or cold water applications.
Threaded brass plugs for secure sealing of 16mm, 20mm, and 25mm pipe runs.
Modular brass distribution manifolds with integrated flow meters and balancing valves for floor heating loops.
Digital temperature controller featuring a backlit LCD screen for regulating underfloor heating systems.
Threaded brass adapters for transitioning between copper pipe, PEX, and standard NPT/ISO threads.
Forged brass angle shut-off valves for point-of-use isolation in water supply networks.
