Yongda
Yongda
Year Founded
Factory Area (Sq.M)
Advanced Manufacturing Units
Global Export Destination Countries
Within modern mechanical, HVAC, and industrial hydraulic systems, fluid control stability is paramount. A pilot-operated check valve (often referred to as a pilot check valve) performs a safety-critical role: it allows free flow in one direction but blocks backflow until signaled by a pilot pressure source. This functionality prevents system pressure drop, protects upstream components, and mitigates structural damage from water hammer in multi-zone distribution networks.
As global energy conservation requirements tighten, hydronic distribution units, heating boilers, and cooling systems rely on precision check valves to prevent thermal back-siphoning and bypass leaks. Selecting the best pilot check valve manufacturer requires examining raw material purity (such as high-grade forged brass DZR), precision machining metrics, cracking pressures, and resistance to environmental stress cracking.
Established in 1996 in Yuhuan, Zhejiang—the recognized "China Valve Capital"—Yuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) has grown into an international leader in professional fluid control engineering. Our operation encompasses R&D, precision forging, testing, assembly, and sales, delivering high-performance environmental brass valves, fittings, and customized HVAC systems to demanding markets in North America and Europe.
With an actual usable factory area of 80,000 square meters, Yongda operates more than 600 sets of advanced production and testing equipment, including 80+ specialized machine tools. This comprehensive footprint enables the company to respond to complex OEM/ODM projects with speed and reliability.
To push technological innovation, Yongda introduced Cokaren, a specialized brand committed to high-end domestic heating and water systems. Focused on the promise "Keep flowing, keep warming," Cokaren represents refinement, zero-defect quality, and smart integration.
Efficient heating and cooling require a unified system architecture where filtration, thermostatic mixing, directional checking, and intelligent distribution work together. Below is our integrated system architecture.
The primary defense layer in domestic and industrial water sanitation, capturing over 98% of pipeline particulates.
Controls hot and cold inlet/outlet flows in central boilers, utilizing a spherical brass spool for tight isolation.
Automatically purges entrapped gases from air-source water heaters, preventing vapor lock and system inefficiencies.
Provides thermal mixing of cold and hot return lines to stabilize floor heating temperatures and protect piping.
Integrates directly with electro-thermal actuators to dynamically monitor and adjust multi-zone room temperatures.
Performs filtration, pressure monitoring, air venting, and isolated shutoff for hydronic system terminals.
Our core distribution manifold balances primary water loops across various rooms. Incorporates manual flow meters, automatic air vents, and bypass loops to ensure balanced temperature and pressure regulation throughout the structure.
Pilot check valves operate under severe hydraulic loads. Our engineering team optimizes flow passage geometries to prevent pressure drops that trigger micro-bubbles and metal erosion.
Meeting NSF/ANSI 372 and European RoHS directives, Yongda utilizes eco-friendly lead-free DZR brass alloys, protecting drinking water safety without sacrificing physical tensile strength.
HVAC systems are evolving. By matching check valves with digital actuator control modules, we help building operators transition to self-balancing smart HVAC installations.
To maintain our zero-leakage standard, Yongda operates a strict quality management system verified by leading global certification bodies. We implement comprehensive testing protocols at every phase of production.
Our manufacturing facilities are fully audited and comply with international standards, holding:
Our QC policy is clear: "Fine work, no leakage." Each batch of check valves, manifolds, and HVAC fittings undergoes hydrostatic testing, air tightness checks, and dimensional verification before dispatch.
Developing specialized low-lead and lead-free copper-zinc-bismuth alloys to satisfy upcoming drinking water regulations in North America and Western Europe, maintaining high machineability and mechanical performance.
Improving the pilot piston seal design of check valves. Integrating specialized PTFE/FKM compounds to ensure stability under chemical exposure and temperature fluctuations from -20°C to 150°C.
Integrating mechanical valves with digital feedback systems, such as smart actuators and electronic pressure transmitters, to enable remote diagnostics and proactive maintenance in commercial hydronic layouts.
Combines reliable shutoff with a cleanable mesh filter, reducing footprint.
Precise manual calibration for localized room radiator circuits.
Optimizes water temperature stability in underfloor manifolds.
Multi-port distribution unit with low pressure drop characteristics.
Corrosion-resistant exterior hose bib tap for heavy-duty applications.
Provides maximum flow rate with minimal restriction.
Accurate connect tubes with standardized threading for water meters.
Precision barb design prevents leakage on flexible pipelines.
