Views: 222 Author: Wode Valve Publish Time: 2026-06-17 Origin: Site
Content Menu
● How We Evaluate Dual Plate Check Valve Suppliers
● China's Industrial Cluster Advantage in Valves
● Market Outlook for Dual Plate Check Valves (2025–2035)
● Top 10 Dual Plate Check Valve Manufacturers in China (2026 Edition)
>> 1. Tianjin Wode Valve Co., Ltd.
>> 2. Zhejiang Zhedong Valve Co., Ltd.
>> 4. Shanghai Lianggong Valve Co., Ltd.
>> 5. Yuanda Valve Group Co., Ltd.
>> 6. Tianjin Tanggu TWT Valve Co., Ltd.
>> 7. Weidouli Valves Co., Ltd.
>> 8. Zhejiang Lixin Valve Co., Ltd.
>> 9. Hefei Milky Valve Co., Ltd.
>> 10. Kaer Valve (China) Co., Ltd.
● Key Technical Considerations for Dual Plate Check Valves
● Buyer's Guide: How to Verify and Work with Chinese Valve Factories
>> Step 1: Verify certifications and documents
>> Step 2: Sample and prototype process
>> Step 3: Contracting and quality agreements
● Common Pitfalls in Sourcing Dual Plate Check Valves – And How to Avoid Them
>> Insider "Internal" Avoid‑Pitfall Tip
● Quick Comparison Table of Selected Manufacturers
● FAQ – Advanced Questions from Professional Buyers
>> 1. How can I verify if a manufacturer's ISO 9001 certificate is still valid?
>> 2. What is the best way to confirm that a dual plate check valve complies with API 594?
>> 4. Can dual plate check valves be installed vertically in all cases?
>> 5. What logistics details should I focus on for large valve shipments?
China has become one of the most competitive and reliable sourcing bases for dual plate (double-door) check valves, especially for water treatment and municipal pipeline projects. [dataintelo]
Below is an expert, procurement‑oriented guide to the top dual plate check valve manufacturers in China, with a special focus on long‑term partnerships, compliance, and lifecycle cost.
Before listing the top manufacturers, it is essential to define transparent selection criteria that align with how professional buyers build supplier panels.
- Certifications and compliance
- Priority to manufacturers with valid ISO 9001 QMS and product conformity to API 594, ASME B16.34, EN, and relevant CE/WRAS type approvals for water and building services. [tfwvalve]
- For export projects, we also screen for experience with third‑party inspections (SGS, BV, etc.). [tfwvalve]
- R&D and engineering capabilities
- Use of CAD/CAE tools, capability for custom designs (non‑standard face‑to‑face lengths, special materials, coatings), and in‑house testing laboratories. [dataintelo]
- Ability to provide technical documentation (datasheets, ITPs, FAT reports) in English for EPC and consulting engineers. [dataintelo]
- Quality control and testing
- Routine hydrostatic, shell and seat tests according to API/ISO, traceable inspection records, and documented QC procedures. [tfwvalve]
- Evidence of incoming material inspection, heat number tracking, and final inspection before shipment. [dataintelo]
- Capacity and delivery stability
- Annual valve output, level of automation (CNC, automated painting, assembly lines), and on‑time delivery performance, especially for project‑based orders. [swdplastic]
- Ability to ramp up for framework agreements and long‑term contracts.
- OEM/ODM experience
- Track record of supplying international valve brands or distributors on a private‑label basis. [dataintelo]
- Flexibility in branding (custom logos, colors, packaging) and documentation support for local approvals.
- Market coverage and application focus
- Proven references in water treatment, municipal pipelines, HVAC, industrial utilities, and offshore/chemical sectors. [tianyuvalves]
- Regional strengths based on industrial clusters (e.g., Tianjin for municipal valves, Wenzhou for stainless steel and exotic materials). [swdplastic]
China's valve industry is highly clustered, with specialized regions that provide strong supply chain and engineering synergies. [swdplastic]
- Tianjin – high‑temperature and municipal valve base
- Known for high‑temperature/high‑pressure valves and municipal water solutions, with strong capabilities in ductile iron and large‑diameter valves. [swdplastic]
- Many waterwork valves, including dual plate check valves, are produced around Tianjin and Cangzhou, making it attractive for water and municipal projects. [swdplastic]
- Wenzhou (Zhejiang) – stainless steel and high‑end valves
- Focus on stainless steel, corrosion‑resistant, and high‑spec valves for petrochemical, food, and pharmaceutical industries. [swdplastic]
- Strong R&D culture and export orientation, with many API and CE‑certified factories. [swdplastic]
- Other hubs
- Cangzhou – municipal valve solutions for water and gas networks. [swdplastic]
- Suzhou and Shanghai – high‑end and heavy‑industry valves, often for power and process applications. [swdplastic]
For buyers, working with suppliers in these clusters often means better access to foundries, machining partners, surface‑treatment providers, and local testing labs.
The global double‑flanged dual plate check valve market is projected to grow steadily over the next decade. [wiseguyreports]
- One report values the double flanged dual plate check valve market at about 2.01 billion USD in 2025, with forecasts up to around 3.36 billion USD by 2034 at approximately 5.8% CAGR. [dataintelo]
- Other market studies indicate a growth rate in the 4.6% range between 2025 and 2035, driven by infrastructure, clean water projects, and industrial modernization. [wiseguyreports]
Key demand drivers include municipal water and wastewater projects, HVAC and building utilities, desalination plants, and industrial process upgrades, where compact non‑return valves with low head loss are preferred. [marketreportanalytics]
Below is a curated list of ten reputable dual plate check valve manufacturers in China, focusing on their strengths, markets, and suitability for OEM/ODM cooperation. [dataintelo]
Tianjin Wode Valve Co., Ltd. is a professional valve manufacturer specializing in water treatment and municipal pipeline valves, including dual plate check valves, butterfly valves, gate valves, and ball valves. Its products are widely supplied to global distributors, EPC contractors, and international valve brands. [ensun]
Key strengths:
- Product scope and standards
- Dual plate check valves designed with ductile iron or stainless steel bodies, EPDM/NBR seats, and low pressure drop characteristics, suitable for potable water, HVAC, and industrial pipelines. [ensun]
- Production aligned with ISO, API, and EN standards, supported by CNC machining centers and precision testing systems. [dataintelo]
- OEM/ODM and flexibility
- Provides OEM and private‑label services for international brands, with support for customized design, materials, coatings, and branding. [dataintelo]
- Particularly suitable for small‑to‑mid sized brands and distributors looking for high cost‑performance, shorter lead times, and responsive communication in English. [ensun]
- Market coverage and positioning
- Strong focus on water treatment and municipal applications, aligning well with water utility and infrastructure projects in Europe, the Middle East, and Southeast Asia. [dataintelo]
- Emphasis on long‑term value and durability rather than purely low price, making it attractive for buyers who balance lifecycle cost and capex.
Tianjin Wode is a representative example of a "high value‑for‑money, R&D‑driven, flexible OEM partner" rather than a mass‑commodity supplier, which is especially relevant for emerging valve brands and mid‑size EPC contractors. [dataintelo]
Zhejiang Zhedong Valve, located in Wenzhou, is one of China's long‑standing industrial valve producers, known for API‑certified check, gate, and ball valves. [dataintelo]
- Technical profile
- Dual plate check valves built to API 594 and ASME B16.34, suitable for oil and gas, metallurgical, and marine systems requiring high pressure and high reliability. [dataintelo]
- Integration of CAD/CAE and CNC machining contributes to dimensional accuracy and mechanical performance. [dataintelo]
- Buyer fit
- Good match for projects with stricter oil & gas or offshore specs, where documentation and compliance are heavily audited. [dataintelo]
Xinhai Valve in Zhejiang focuses on wafer‑type and flanged dual plate check valves with optimized hydrodynamic design. [dataintelo]
- Product features
- Lightweight construction with epoxy‑coated surfaces, designed for water supply and chemical industries. [dataintelo]
- Optional spring configurations to suit different media and installation orientations. [dataintelo]
- OEM/ODM capability
- Provides OEM and ODM services for international brands, allowing customized configurations and branding. [dataintelo]
Shanghai Lianggong Valve is a diversified manufacturer with over 30 years of experience, producing dual plate check valves, butterfly valves, and ball valves. [dataintelo]
- Application sectors
- Widely installed in urban water systems, refinery pipelines, and power generation facilities. [dataintelo]
- Dual plate check valves with high‑strength hinge shafts and low backflow leakage, suitable for continuous operation networks. [dataintelo]
- QC and engineering
- Strong technical team and comprehensive inspection center, providing a structured QC environment for project orders. [dataintelo]
Yuanda Valve Group is one of China's major valve conglomerates, offering a wide range under BS, ANSI, API, and DIN standards. [dataintelo]
- Product scope
- Dual plate check valves used in water distribution, HVAC, and marine systems, often part of broader product packages for EPC contracts. [dataintelo]
- Automated production lines and robotic painting enhance consistency and surface quality. [dataintelo]
- Buyer profile
- Suitable for large utilities and EPC consortia requiring multi‑product sourcing from a single group. [dataintelo]
Tianjin Tanggu TWT Valve focuses on water supply valves, including double‑flanged and wafer‑type dual plate check valves. [dataintelo]
- Technical positioning
- Emphasis on epoxy‑coated ductile iron bodies for buried or corrosive environments, typical in municipal networks. [dataintelo]
- Valves valued for flow performance and compact footprint in pumping stations and distribution grids. [dataintelo]
- Regional advantage
- Located in Tianjin, benefiting from the municipal valve supply chain cluster. [swdplastic]
Weidouli Valves in Wenzhou is recognized for using exotic materials such as titanium, duplex stainless steel, and Hastelloy. [dataintelo]
- Application focus
- Dual plate check valves tailored for chemical, desalination, and offshore projects where severe corrosion is a concern. [dataintelo]
- Extensive international certifications and partnerships with global end‑users in Europe and the Americas. [dataintelo]
- Buyer fit
- Ideal for high‑corrosion, high‑spec environments where material selection is critical and budget is secondary to reliability. [dataintelo]
Zhejiang Lixin Valve offers cost‑effective dual plate check valves for water and industrial fluids. [dataintelo]
- Technical profile
- Wafer, flanged, and cast‑steel dual plate check valves up to DN600, with pressure and leakage testing to ISO 9001 and CE standards. [dataintelo]
- Focus on consistent quality and short lead times for overseas distributors. [dataintelo]
- Buyer segment
- Particularly attractive for distributors and medium‑sized projects needing reliable mid‑range solutions. [dataintelo]
Hefei‑based Milky Valve manufactures precision check valves for energy, oil and gas, and fire protection industries. [dataintelo]
- Product advantages
- Dual plate check valves designed for low pressure drop and easy installation, suitable for grid‑type distribution systems. [dataintelo]
- Investment in automated machining and advanced casting processes to ensure product uniformity. [dataintelo]
Kaer Valve provides comprehensive valve solutions for building, municipal, and power markets. [dataintelo]
- Product range
- Dual plate check valves available in ductile iron, carbon steel, and stainless steel, matching diverse application environments. [dataintelo]
- Modern testing labs and R&D support enable continuous improvement and tailored project solutions. [dataintelo]
- Global footprint
- Partnerships with engineering firms across Asia, Africa, and Europe, proving export readiness and multi‑market experience. [dataintelo]
Understanding the technical parameters behind dual plate check valves helps buyers align specification sheets with real‑world performance. [dataintelo]
- Materials and coatings
- Common body materials: ductile iron, carbon steel, stainless steel, and special alloys, chosen based on medium (potable water, seawater, chemicals) and pressure class. [dataintelo]
- Typical seat materials: EPDM or NBR for water and general service, with corrosion‑resistant discs and shafts to extend service life. [dataintelo]
- Standards and dimensions
- Face‑to‑face dimensions often per ISO 5752 or API 594, which affects interchangeability with existing installations. [dataintelo]
- Flange drilling per EN, ASME, or other regional standards, critical for export projects. [dataintelo]
- Performance characteristics
- Low head loss design with streamlined flow passages and lightweight plates to minimize energy consumption in pumping systems. [dataintelo]
- Spring‑assisted plates reduce water hammer during flow reversal, enhancing pipeline safety. [dataintelo]
- Check ISO 9001 and product certifications
- Request digital copies of ISO 9001 certificates and product approvals (e.g., CE, WRAS, EAC) and confirm validity dates. [tfwvalve]
- Cross‑check certificate numbers with issuing bodies or their online databases where available.
- Confirm standards compliance
- Ask for typical MTCs (Mill Test Certificates), test reports, and type test data for dual plate check valves according to API 594 or equivalent. [dataintelo]
- Request pre‑production samples
- Start with a small batch or sample order to validate dimensions, coating quality, and assembly before committing to container‑level volumes. [dataintelo]
- Include PMI (Positive Material Identification) and third‑party inspection for higher‑risk projects.
- Functional testing
- Conduct pressure and seat tests on arrival, and check for plate response (opening pressure, closure behavior) in your own facilities or a third‑party lab. [dataintelo]
- Technical and quality agreements
- Define agreed standards, inspection plans, warranty periods, and NCR (non‑conformance) management in writing. [dataintelo]
- For OEM deals, ensure your brand requirements (logo, labeling, documentation) are explicitly described.
- Delivery and logistics
- Clarify lead times, packaging specifications (palletization, internal protection, coating condition), and Incoterms (FOB, CIF, etc.). [dataintelo]
- For heavy valves, consider reinforcement of crates and anti‑corrosion packaging for sea freight.
- Material downgrading
- Risk: substituting specified materials (e.g., using lower‑grade ductile iron or low‑nickel stainless steel) without disclosure.
- Mitigation: enforce material traceability (heat numbers on bodies, MTCs matching purchase orders) and spot PMI checks on incoming goods. [dataintelo]
- Inconsistent coatings
- Risk: uneven epoxy thickness or poor surface preparation leading to premature corrosion.
- Mitigation: specify coating standards (e.g., minimum DFT), require coating reports, and visually inspect samples.
- Documentation gaps
- Risk: incomplete test reports or missing documentation delaying site approvals.
- Mitigation: mandate complete documentation package before shipment and tie partial payment to document delivery.
A widely known but rarely publicized practice among experienced buyers is to deliberately place two small, identical trial orders with different factories under the same specification and then cross‑audit their MTCs, test reports, and actual valve weights.
- If the actual weights and wall thicknesses differ significantly from drawings, it may indicate material saving or design changes to cut cost.
- Consistent data and weights close to design values suggest better process discipline and internal controls, even if unit prices are slightly higher.
This "dual‑trial" strategy provides a practical, data‑driven way to identify which supplier respects drawings and standards in real production without relying solely on brochures or certifications. [swdplastic]
Below is a simplified comparison (indicative only; buyers should reconfirm with each factory).
| Manufacturer | Typical Capacity / Focus | Indicative MOQ (project valves) | Key Certifications / Standards Focus |
|---|---|---|---|
| Tianjin Wode Valve | Water & municipal valves, dual plate check, butterfly, gate ensun | Flexible; suitable for SME brands and distributors dataintelo | ISO‑aligned, API/EN‑oriented, export‑experienced dataintelo |
| Zhejiang Zhedong Valve | Oil & gas, high‑pressure API valves dataintelo | Medium to high | API 594, ASME B16.34, API series dataintelo |
| Xinhai Valve | Wafer dual plate for water/chemical dataintelo | Medium | ISO/CE focus, epoxy‑coated designs dataintelo |
| Shanghai Lianggong Valve | Urban water, refinery, power plants dataintelo | Medium | Comprehensive inspection center, multi‑standard dataintelo |
| Yuanda Valve Group | Large multi‑line valve group dataintelo | Higher MOQ, suits big projects | BS, ANSI, API, DIN across product lines dataintelo |
| Tianjin Tanggu TWT Valve | Municipal water valves, double‑flanged dataintelo | Medium | Water utility standards, epoxy coatings dataintelo |
| Weidouli Valves | Exotic material valves (titanium, duplex) dataintelo | Project‑based, higher unit cost | Multiple international certifications dataintelo |
| Zhejiang Lixin Valve | Economical dual plate for water/industry dataintelo | Relatively low, distributor‑friendly | ISO 9001, CE, ISO test routines dataintelo |
Ask for a clear scan of the ISO 9001 certificate, check the issue and expiry dates, and identify the issuing body. Then visit the certification body's official website or database to verify the certificate number and scope, and ensure the certified activities cover "valve design and manufacturing" or equivalent. [tfwvalve]
Request the product's design standard declaration, type test report, and typical dimensional drawings referencing API 594. Cross‑check face‑to‑face dimensions and pressure class in the drawings against the API 594 tables and, where feasible, measure sample valves to confirm. [dataintelo]
Specify material grades (e.g., CF8M, duplex stainless, titanium) in the purchase order and require matching MTCs with heat numbers on valve bodies or nameplates. For critical projects, use third‑party PMI on random samples from each batch to confirm chemistry. [ensun]
Most dual plate check valves are suitable for horizontal and vertical installation, but the flow direction and plate orientation must match manufacturer guidelines. Always follow the flow direction arrow on the body and consult the supplier for specific constraints (e.g., vertical upflow vs. downflow). [dataintelo]
For container shipments, insist on robust wooden crates, anti‑rust packaging (e.g., VCI bags or oiling), and clear labeling for each valve (size, pressure, material, project ID). Confirm loading plans, weight distribution, and any special lifting requirements for large diameters to avoid damage during transport and handling. [dataintelo]
- "Top 10 Dual Plate Check Valve Manufacturers in China" – Industry article providing an overview of major Chinese suppliers and selection factors. [dataintelo]
- Tianjin Wode Valve official site – Product categories and company profile for butterfly valves, dual plate check valves, gate valves, and ball valves. [ensun]
- TFW Valve – Example of Chinese valve manufacturer certifications such as WRAS, EAC, ISO9001, CE, ACS, SGS, BV. [tfwvalve]
- "Top 10 valve manufacturers bases in China" – Overview of China's valve industry clusters and regional specializations. [swdplastic]
- Double flanged dual plate check valve market reports – Global market size and CAGR projections for 2025–2035. [marketreportanalytics]
