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Help CenterDual Plate Check Valve for Industrial Cooling Water Circulation in Power Plants and HVAC Systems
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Shanghai Zhibang Valve Manufacture Co., Ltd. is a professional manufacturer established in 2016, specializing in high-quality industrial valves. Our Dual Plate Check Valve is designed specifically for industrial cooling water circulation in power plants and HVAC systems, offering reliable backflow prevention, compact wafer-style installation, and minimized pressure loss. With ISO9001 certification and annual export value exceeding US$1 million, we serve global markets across North America, Europe, Asia, and more.
The dual plate design features two spring-loaded discs that close quickly when flow reverses, preventing water hammer and protecting pumps, compressors, and other equipment. Its lightweight construction reduces installation costs, while the non-slam operation ensures quiet and stable performance. This valve is ideal for both open and closed cooling water loops, providing long service life even under continuous operation.
Key Features
- Compact Wafer Design: Fits between flanges, saving space and weight compared to swing check valves.
- Low Pressure Drop: Streamlined flow path and lightweight discs minimize resistance, reducing energy consumption.
- Non-Slam Operation: Spring-assisted closure prevents water hammer, extending system life.
- Durable Construction: Available in stainless steel, carbon steel, or ductile iron with corrosion-resistant coatings.
- Wide Application Range: Suitable for clean water, cooling water, and non-aggressive fluids in power plants, HVAC, and industrial processes.
- Easy Maintenance: Simple design with few moving parts; no external maintenance required.
Technical Specifications
| Parameter | Value |
| Size Range | DN50 – DN600 (2" – 24") |
| Pressure Rating | PN10, PN16, Class 150 (customizable) |
| Temperature Range | -20°C to +120°C (EPDM seal); optional high-temp up to 200°C |
| Body Material | Carbon Steel WCB / Stainless Steel CF8M / Ductile Iron |
| Disc Material | Stainless Steel SS304 / SS316 |
| Seal Material | EPDM (standard), NBR, VITON (optional) |
| Connection Type | Wafer type (between flanges) |
| Standard | API 594, DIN 3202, BS 1868 (available upon request) |
Customer Benefits
- Energy Savings: Low pressure drop reduces pump power consumption by up to 15% compared to traditional check valves.
- Space Optimization: Short face-to-face length allows installation in tight spaces, ideal for retrofitting.
- Reliable Protection: Prevents reverse flow and water hammer, safeguarding expensive equipment like cooling towers and heat exchangers.
- Long Service Life: Corrosion-resistant materials and robust spring mechanism ensure performance over decades.
- Global Compatibility: Designed to meet international flange standards (DIN, ANSI, JIS) – customizable upon request.
Quality Assurance & Trust
At Shanghai Zhibang Valve, we are committed to delivering ISO9001-certified products. Our dual plate check valves undergo rigorous testing including hydrostatic pressure tests, sealing tests, and material verification. With an annual export value of US$1–1.5 million, we have supplied valves to power plants, HVAC contractors, and industrial facilities across North America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. Our shipping ports include Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery worldwide.
Choose our dual plate check valve for a reliable, cost-effective solution that meets the demanding requirements of industrial cooling water circulation. Contact us today for a quote or technical consultation.
Frequently Asked Questions (FAQ)
Q1: What is the maximum working pressure for this valve?
A: The standard pressure rating is PN16/Class 150, but higher ratings (PN25, Class 300) are available as custom options.
Q2: Can this valve be installed vertically?
A: Yes, the dual plate check valve works in both horizontal and vertical pipelines, provided the flow direction is upward.
Q3: What maintenance is required?
A: The valve is virtually maintenance-free. Periodic inspection of seals and disc movement is recommended every 2–3 years.
Q4: How does it prevent water hammer?
A: The spring-loaded discs close rapidly when flow reverses, eliminating the slamming effect common in swing check valves.
Q5: What materials are available for corrosive environments?
A: We offer stainless steel (CF8M) bodies and discs, with optional VITON seals for high chemical resistance.
Q6: What is the lead time?
A: Standard sizes (DN50–DN300) are typically shipped within 15–20 working days. Custom orders may require 25–30 days.
Q7: Do you provide certificates of material and testing?
A: Yes, we provide material certificates, hydrostatic test reports, and other documentation upon request.
Q8: Can I get a sample for testing?
A: Absolutely. Sample orders are welcome, and we can customize the valve to your specific requirements.
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