Yongda
Yongda
Explore our top-tier brass valves and piping adaptors designed for global industrial, HVAC, and residential energy distribution applications.
Screwed ball valves represent the backbone of low-to-medium pressure fluid dynamics in modern infrastructure. Known for their compact architecture, swift quarter-turn activation, and dependable bubble-tight sealing, threaded ball valves are indispensable in chemical processing, domestic plumbing, municipal water networks, and industrial HVAC distribution.
In the global market, high-precision brass and alloy formulations have surged in demand due to regulations governing lead release and material longevity (such as USA Safe Drinking Water Act standards). Screwed connections (NPT or BSP) remain the industry standard because of their fast assembly, structural integrity, and ease of replacement during active system maintenance cycle periods.
Leveraging state-of-the-art forging processes allows manufacturers to minimize structural porosity. This guarantees a pressure-resilient valve body capable of absorbing mechanical stresses in dynamic pipelines.
Understanding the internal engineering specifications that separate industrial-grade threaded valves from domestic utility items.
Utilizing premium lead-free forged brass, CW617N, and DZR (Dezincification Resistant) alloys. This prevents selective zinc leaching under aggressive water conditions, safeguarding structural integrity and clean water pathways.
Equipped with pure PTFE seats and double Viton/NBR O-rings. Our design delivers low operational torque and leak-free performance over 100,000 continuous open-close cycles in fluctuating thermal zones.
Machined using multi-axis CNC lathes to strictly comply with ISO 228-1 (BSP) and ANSI/ASME B1.20.1 (NPT) requirements. This ensures secure mechanical coupling without thread galling.
A comprehensive diagrammatic look at modern building energy balancing, combining hydronic components for intelligent zoning.
The first line of defense in domestic water sanitation, filtering 98% of sediment and particulate impurities inside piping.
Engineered with a spherical spool to regulate direct cold and hot water inflows and outflows in central boilers.
Maintains dynamic system equilibrium by venting excess air in heat-pump and source water heater circuits.
Balances thermal profiles inside supply pipelines by mixing hot and cold streams, shielding tubing from thermal shocks.
Combines smart sensors with actuators to coordinate zoning valves and modulate room ambient temperatures.
An integrated solution that filters sediment, measures pipeline pressure/temperature, and controls manifold flow.
Distributes system fluid to various independent loops, adjusting zonal flow rates based on command signals.
"Refined Aesthetics, Certified Quality, Total Customer Satisfaction."
Cokaren is the new brand identity of Yuhuan Yongda Fluid Control Co., Ltd. Backed by 28 years of industrial valve production, Cokaren concentrates on the design, optimization, and premium delivery of modern home water and hydronic accessories.
We are implementing a rigorous strategy to scale the limits of valve service life under demanding climate conditions. We combine beautiful product industrial designs with robust performance metrics, ensuring energy efficiency and long-term security in residential plumbing systems.
Key projections shaping the future of global fluid flow automation and mechanical design over the next decade.
Traditional brass valves degrade over time in aggressive or chlorinated water chemistry due to selective zinc leaching (dezincification). Future standards globally demand DZR and Lead-Free brass variants (such as CW602N and Eco-Brass) to secure public health and structural reliability.
Traditional manually operated ball valves are evolving into actuator-ready units. By matching low-torque ball valves with intelligent actuators, systems like the Y9031 Smart Thermostat can regulate zoning parameters remotely, reducing thermal waste by up to 22% in modern buildings.
Top-tier exporters rely on automated forge-casting and assembly lines to eliminate operator errors. Regular testing under ISO9001:2015 guarantees zero-leakage compliance (air/liquid shell and seat tests) on 100% of finished valves, rather than random sample testing.
Leveraging advanced production equipment to deliver reliable flow controls worldwide.
Yuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) was founded in 1996 in Yuhuan, Zhejiang—known as the "China Valve Capital". Spanning a total factory footprint of 45,000 square meters (with more than 80,000 square meters of usable shopfloor area), we deploy more than 600 sets of specialized machining, forge-casting, and quality testing equipment.
This operational scale enables us to satisfy customized engineering specifications for major commercial projects and distributors in Europe, North America, and across the globe.
Our quality architecture is certified to international management systems, including:
Providing direct, expert answers to key operational queries about screwed ball valve selection, procurement, and standards.
NPT (National Pipe Thread) is primarily used in North America and has a 60° thread angle with flattened crests and roots. BSP (British Standard Pipe), widely used in Europe and the Commonwealth, features a 55° thread angle with rounded crests and roots. They are not compatible and cannot be directly mated without leak hazards; adapters must be utilized if transitioning between the two.
Forged brass is manufactured under immense mechanical pressure and heat, creating a dense, non-porous structure with uniform grain alignment. Cast brass is poured into molds, leaving the risk of internal air pockets, pinholes, and microscopic fissures that may lead to catastrophic valve body failures under cyclic thermal loads or high pressure.
Prices vary based on raw copper market valuation, nickel/chrome surface plating thickness, thread dimension (sizes from 1/4" to 4" and beyond), and mechanical design complexity. For instance, high-pressure standard 2-way valves are priced differently than specialized items with integrated filters or motorized actuation options. Contact our sales department directly to request a targeted pricelist based on your custom order volume.
Debris, mineral scales, and pipe shavings can clog boiler heat exchangers and damage valve seating surfaces. Combined products like our Ball Valve with Filter or Y-strainers consolidate space and plumbing steps, preventing particles from reaching downstream pumps, manifolds, and regulating instruments.
A closer look at specialty valves designed for residential radiant systems and municipal plumbing interfaces.
Combines isolation and filtration within a single brass body, reducing piping steps and minimizing system pressure drops.
Provides precise mechanical throttling for localized hydronic heat loops, enhancing individual space comfort.
Controls flow diversion and returns, helping keep floor heating fluid temps within optimal operating bounds.
Manifolds regulate loop-by-loop hydraulic parameters, balancing return flow temperatures in multi-story residential designs.
Highly durable outdoor and hose connections engineered to handle frost stress and high-use operations.
Ensures low pressure loss in full-flow paths. Suitable for utility lines where throttling is not required.
Corrosion-resistant extension pieces that simplify flow meter installation, securing water path metrics.
Specially customized for the North American market, matching domestic hose thread requirements.
We apply a strict "Fine work, no leakage" policy at our production plant. From spectrometer material testing of molten brass alloy to hydrostatic pressure checks of each valve shell and seat, quality management is integrated into every step.
This structured validation process prevents line pressure loss, stem blowouts, and stress-induced corrosion cracking in heating systems. Working with certified suppliers ensures your supply chain is resilient and compliant with building codes across Europe and North America.
Explore a selection of specialty valves designed to regulate fluid flow and protect piping systems from overpressure.
Forged piston mechanism reduces high supply pressure, protecting domestic pipes from damage.
Features corrosion-resistant external threads, ensuring a reliable seal for outdoor and utility use.
Allows for quick hose attachment and removal, providing simple flow control for commercial and residential washdown areas.
A dependable connection option designed to handle frequent on-off cycles in household pipelines.
Releases excess pressure in closed-loop systems, helping prevent damage to boiler units.
Features a locking handle mechanism to prevent unauthorized water use in public spaces.
Traditional multi-turn isolation valve designed to minimize fluid turbulence and downstream erosion.
Prevents backflow in domestic piping while trapping debris via an integrated T-strainer mesh screen.
Separates particulates from water lines, protecting high-precision downstream control devices.
Maintains pump prime in water systems by preventing backward siphonage, while filtering intake debris.
Inline brass non-return valve designed for low crack pressure and reliable flow direction control.
Balances manifold fluid temperatures to optimize energy use in radiant underfloor heating setups.
Controls flow rates and return fluids, helping protect building circuits from temperature spikes.
Integrates air vent valves, drain ports, and temp sensors to provide unified control over zone heating loops.
Stabilizes hydronic pressure in zone circuits by bypassing excess flow when valves close.
Provides a manual venting point to bleed trapped air, helping maintain consistent heat transfer across underfloor loops.
Continuously vents gas buildup in plumbing networks to prevent air locks and water hammer noise.
Removes micro-bubbles from thermal fluid systems to help prevent interior pipe oxidation and heat loss.
Combines venting and drainage at the manifold end-station, simplifying regular system maintenance and flushes.
Provides a clean mechanical seal for polyethylene water pipes without requiring specialized soldering tools.
Precisely machined adapter joints for industrial plumbing, ensuring leak-free transitions between pipe sizes.
Explore our secondary lineup of premium radiator valves, manifold components, and compression plumbing adapters.
