Yongda
Yongda
Explore our high-performance PE-RT pipes, brass fittings, and central manifold accessories optimized for residential and commercial heating systems.
In modern HVAC and underfloor heating system designs, PE-RT (Polyethylene of Raised Temperature Resistance) has emerged as a revolutionary material replacing traditional copper and older polyolefin systems. PE-RT is constructed using unique ethylene-octene copolymer resins. Unlike standard PEX (cross-linked polyethylene) which relies on chemical cross-linking (such as silane, peroxide, or irradiation), PE-RT achieves its excellent hydrostatic strength and thermal stability through its unique molecular design.
The core mechanism lies in the controlled, long-chain branching of the polymer backbone. By placing octene side chains along the macromolecular chain, the polymer forms a high density of "tie-molecules" that link crystalline regions. This molecular structure allows the pipe to absorb high mechanical and thermal stresses without cracking, retaining its high flexibility while matching or exceeding the long-term hydrostatic design basis (HDB) of PEX pipes at high operating temperatures.
Founded in 1996 in Yuhuan, Zhejiang—known globally as "China’s valve capital"—Yuhuan Yongda Fluid Control Co., Ltd. (formerly Yuhuan Yongda Plumbing Co., Ltd.) has positioned itself as a leading innovator in environmental protection fluid technologies. For over two decades, we have focused on the design, development, production, and sales of high-performance brass valves, plumbing fittings, and HVAC manifolds.
Our commitment to premium engineering and leak-free reliability is backed by our newly established brand, Cokaren. Rooted in our brand promise of "keep flowing, keep warming", Cokaren products are designed to deliver exceptional warmth and durability to homes and commercial spaces globally.
Why Tier-1 international contractors and mechanical distributors source their piping infrastructure from Zhejiang, China.
Yuhuan operates as a dense hub for industrial brass casting, precision extrusion, and high-polymer tube engineering. This hyper-localized ecosystem drastically lowers raw material procurement costs and guarantees immediate tooling adjustments.
Equipped with over 600 sets of production testing stations, our facilities run real-time pressure testing, thermal cycling analysis, and oxygen permeability checking on every batch to secure leak-free compliance before shipment.
We configure pipe dimensions, wall thicknesses (SDR 9, SDR 11), printing markers, and coil lengths to fit regional residential and commercial construction standards in Europe, North America, and beyond.
Unlike standard tube extruders who purchase fittings from third parties, Yuhuan Yongda designs and manufactures the brass manifolds, compression fittings, and check valves in-house. This centralized assembly design eliminates thread tolerances and mismatch issues, reducing installation leaks to absolute zero.
Through our dedicated quality policy of "fine work, no leakage", we monitor each stage from hot forging brass rods to co-extruding three-layer and five-layer EVOH PE-RT tubes, providing global sourcing companies with a streamlined single-source solution.
A unified system loop showcasing how PE-RT pipes, brass manifolds, and filtration units work in synergy.
Our integrated thermal layout links high-efficiency PE-RT tubes directly with smart manifolds and pressure valves to maximize thermal transfer efficiency while preventing oxygen permeation.
The first line of defense in domestic water sanitation, filtering 98% of impurities.
Features a spherical spool to balance boiler hot/cold water flow.
Discharges excess air from the system to ensure constant hydraulic pressure.
Maintains stable liquid temperatures, preventing thermal pipe fatigue.
Ensuring cross-border compliance through rigorous testing and certifications to support mechanical designers and inspectors.
Deploying underfloor piping in global commercial projects requires total regulatory compliance. Our PE-RT pipes and companion brass connectors are designed and engineered to satisfy international certification structures:
Establishes the foundation of our manufacturing steps, tracking raw material resin lots to completed coiled shipments.
Validates our eco-friendly production methods, which minimize waste output and chemical runoffs during extrusion.
Ensures a safe and modern workspace for our 600+ factory operators and technical staff.
An executive guide to building a predictable HVAC piping pricelist strategy.
When engineering firms build high-volume sourcing lists, raw polymer cost represents only one portion of the total cost of ownership. Designing a scalable purchasing agreement requires understanding the five core components of a PE-RT pipeline pricelist:
The international pricing of raised-temperature resistant polyethylene is connected to the cost of crude oil and ethylene monomers. Choosing premium-grade base polymers (e.g., Dowlex or equivalent European imports) yields consistent thermal values and prevents early pipe fatigue under stress.
Three-layer systems (PE-RT / Adhesive / EVOH) position the barrier on the outside, which can be vulnerable to installation abrasion. Five-layer pipes (PE-RT / Adhesive / EVOH / Adhesive / PE-RT) sandwich the barrier in the middle, securing long-term system protection at a modest price premium.
SDR denotes the ratio of the outer pipe diameter to its wall thickness. Selecting SDR 9 provides thicker walls to support higher working pressures (such as multi-story buildings), while SDR 11 optimizes thermal transfer values for standard floor heating setups.
Coil sizes (typically 100m, 200m, or 500m reels) dictate container utilization efficiency. Bundling fitting boxes with matching pipe pallets maximizes container space, lowering global freight expenses per unit by up to 15%.
Addressing the technical, commercial, and installation questions of contractors and mechanical procurement leads.
Explore matching valves, mixing systems, and plumbing accessories that complete a high-performance PE-RT pipeline infrastructure.
