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Help CenterDual Plate Check Valve Standard Compliant for Reliable Cooling Water Circulation in Industrial Systems
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Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016 and ISO9001 certified, is proud to present our Dual Plate Check Valve designed specifically for reliable cooling water circulation in industrial systems. With an annual export value of US$1 million to US$1.5 million and a global presence spanning North America, Europe, Asia, and Oceania, we bring years of manufacturing expertise to every valve we produce. Our dual plate check valve offers a robust, low-maintenance solution that prevents backflow and protects your equipment, ensuring uninterrupted operation in demanding industrial environments.
This valve is engineered to meet rigorous international standards, providing a dependable seal and minimal pressure drop. Its compact wafer design allows for easy installation between flanges, saving space and reducing material costs. Whether you are managing a large-scale cooling tower, a district heating system, or a chemical process loop, our dual plate check valve delivers consistent performance and long service life.
Key Features & Advantages
- Dual Plate Design – Two spring-loaded plates close quickly to prevent backflow, reducing water hammer and protecting downstream equipment.
- Wafer Type Construction – Compact and lightweight, fits between standard flanges (ANSI, DIN, JIS) without additional support.
- Low Pressure Drop – Streamlined flow path minimizes energy loss, improving system efficiency.
- Corrosion-Resistant Materials – Available in cast iron, ductile iron, carbon steel, and stainless steel with optional epoxy or nylon coating.
- Non-Slam Operation – Spring-assisted closure ensures silent, vibration-free operation even at low flow rates.
- Easy Maintenance – No external moving parts; seat and disc can be replaced without removing the valve from the pipeline.
- Versatile Sealing Options – EPDM, NBR, or Viton seals to suit different media temperatures and chemical compatibility.
- Full Port Design – Available in sizes from DN50 to DN600, with pressure ratings up to PN16 or Class150/300.
Technical Specifications
| Parameter | Value / Range |
|---|---|
| Size Range | DN50 – DN600 (2" – 24") |
| Pressure Rating | PN10/16, Class150, Class300 |
| Operating Temperature | -20°C to +350°C (depending on material) |
| Body Material | Cast Iron / Ductile Iron / Carbon Steel / Stainless Steel |
| Disc Material | Stainless Steel / Ductile Iron (optional) |
| Spring Material | Stainless Steel (301/304) |
| Seal Material | EPDM / NBR / Viton |
| Connection Type | Wafer (between flanges) |
| Applicable Standards | API 594, ISO 5752, ISO 9001 |
Benefits for Your Industrial Cooling System
Our dual plate check valve is specifically optimized for cooling water circulation where reliability and low maintenance are critical. The dual plate design reduces the risk of slamming and water hammer, which can cause costly damage to pumps, pipes, and heat exchangers. By maintaining a constant flow direction, the valve protects your system from reverse flow that could introduce contaminants or disrupt thermal balance.
The compact wafer form allows installation in tight spaces, making it ideal for retrofitting existing systems without major piping modifications. Additionally, the availability of multiple material grades and seal compounds ensures compatibility with a wide range of water qualities, including treated, raw, or sea water. The low pressure drop characteristic translates directly into energy savings, reducing operational costs over the valve's lifetime.
Each valve undergoes rigorous quality control at our Shanghai factory, including pressure testing, seat leakage testing, and dimensional verification. Our ISO9001 certified management system ensures consistent production standards. We also offer customization options such as special coatings, extended stems, or actuation accessories upon request.
Trust & Reliability
Since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. has been serving customers in over 20 countries, with an annual export value of US$1 million to US$1.5 million. Our valves are shipped from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery anywhere in the world. We have established long-term partnerships with clients in North America, Europe, Southeast Asia, Africa, and Oceania, who rely on our products for critical applications in power generation, petrochemical, water treatment, and HVAC.
We stand behind the quality of our dual plate check valves with a comprehensive warranty and responsive after-sales support. Our technical team is available to assist with selection, installation, and troubleshooting. By choosing our valve, you are investing in a proven solution that minimizes downtime and maximizes system efficiency.
Contact us today for a quote or to discuss your specific cooling water circulation requirements. We are ready to provide you with a reliable, standard-compliant check valve that fits your budget and schedule.
Frequently Asked Questions (FAQ)
-
What is the difference between a dual plate check valve and a swing check valve?
A dual plate check valve uses two spring-loaded plates to close quickly, reducing water hammer and allowing installation in any orientation. Swing check valves rely on a single disc that swings open, which may require gravity closure and can cause slamming in vertical pipelines. -
Can this valve be used for hot water or steam?
Yes, depending on the material selection. With stainless steel body and disc, and high-temperature seals (e.g., Viton), the valve can handle temperatures up to 350°C. For standard cooling water applications, EPDM seals are suitable up to 120°C. Always consult our technical team for your specific temperature and pressure conditions. -
Is the valve suitable for horizontal and vertical installation?
Yes, the dual plate check valve can be installed in both horizontal and vertical pipelines with upward flow. For vertical downward flow, a spring-assisted design is recommended. Our valve is spring-loaded, making it suitable for vertical installations as well. -
What standards does the valve comply with?
Our valves are designed in accordance with API 594 and ISO 5752 for face-to-face dimensions and pressure testing. The manufacturing process is ISO9001 certified. We also offer valves that meet ANSI, DIN, or JIS flange standards upon request. -
How do I select the correct size and pressure rating?
The size should match the pipe diameter and flow requirements. Pressure rating should be equal to or greater than the maximum system operating pressure. For cooling water systems, PN10/16 or Class150 is commonly used. For higher pressures, Class300 is available. Our sales team can help you with sizing calculations. -
What is the typical lead time for orders?
Standard sizes (DN50-DN300) are usually in stock and can be shipped within 7-15 days after order confirmation. Larger sizes or custom materials may require 20-30 days. We work with multiple ports to ensure fast logistics. -
Does the valve require regular maintenance?
The dual plate check valve is designed for low maintenance. Periodic inspection of the seal and spring condition is recommended every 2-3 years, depending on the operating environment. Seats and discs are replaceable without removing the valve body from the pipeline. -
Can I get a sample or small quantity for testing?
Yes, we offer samples for evaluation. Minimum order quantity for standard sizes is typically 1 piece. Please contact us with your requirements, and we will provide a quotation and delivery schedule.
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