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Help CenterCB/T4303 Standard Marine Wafer Dual Plate Butterfly Check Valve, Cast Steel Body, DN50-DN600, PN1.0-4.0MPa
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As a professional valve manufacturer since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in delivering high-performance fluid control solutions for demanding global markets. Our CB/T4303 Standard Marine Wafer Dual Plate Butterfly Check Valve represents our commitment to engineering excellence, specifically designed to meet the rigorous requirements of marine and industrial applications. This valve combines robust construction with advanced non-slam technology, offering superior flow control and reliable backflow prevention. Engineered with a cast steel body, it ensures durability and longevity even in the harshest saline and high-pressure environments, providing our clients in sectors like shipping, offshore, and heavy industry with a dependable and maintenance-friendly valve solution.
The core design of this valve focuses on efficiency and reliability. The dual plate wafer design allows for compact installation between flanges, saving significant space and weight compared to traditional check valves—a critical advantage in space-constrained marine engine rooms and industrial plants. Its key characteristics include:
- Non-Slam & Water Hammer Prevention: The dual plates are spring-assisted and close smoothly before flow reversal, drastically reducing the risk of water hammer, which protects the entire piping system from shock damage.
- Bidirectional Sealing Capability: Provides effective sealing in both flow directions, enhancing system safety and preventing leakage.
- Low Pressure Drop & High Flow Efficiency: The streamlined disc design minimizes flow resistance, optimizing pump efficiency and reducing energy consumption.
- Corrosion Resistance: The cast steel body, often with optional coatings like epoxy, offers excellent resistance to corrosion, making it ideal for seawater, ballast, and chemical service.
- Easy Maintenance & Inspection: The wafer design simplifies installation and removal. Many models allow for inline maintenance without removing the valve body from the pipeline.
- Versatile Application Range: Suitable for seawater cooling, firefighting systems, fuel oil lines, bilge systems, and various industrial process lines.
The technical specifications of our Marine Wafer Dual Plate Butterfly Check Valve are detailed below to help you evaluate its suitability for your project:
| Parameter | Specification / Range |
| Design & Manufacturing Standard | CB/T4303 (Chinese Ship Standard) |
| Valve Type | Wafer Dual Plate Butterfly Check Valve |
| Body Material | Cast Steel (WCB, LCB, etc., customizable) |
| Size Range (Nominal Diameter) | DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600 |
| Pressure Rating (PN) | PN1.0, PN1.6, PN2.5, PN4.0 MPa |
| Temperature Range | Standard: -29°C to 425°C (depending on seat material) |
| End Connection | Wafer (RTJ flange face optional) |
| Disc Material | Stainless Steel (304/316), Duplex Steel (optional) |
| Seat Material | EPDM, NBR, Viton, Metal Seat (available upon request) |
| Spring Material | Stainless Steel |
Choosing our valve brings distinct advantages to your operations. The non-slam feature extends the lifespan of pumps and pipes. The compact wafer design reduces installation costs and time. Furthermore, compliance with the CB/T4303 standard ensures it meets recognized benchmarks for marine valve performance and safety. Our production processes are governed by an ISO9001 Quality Management System, guaranteeing consistent quality from raw material inspection to final testing, including shell tests and seat leakage tests.
With an annual export value ranging between US$1 Million and US$1.5 Million, Shanghai Zhibang has established a strong global presence, supplying reliable valves to key markets across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and Eastern Asia. Our products are shipped efficiently from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing. This valve is not just a component; it's a safeguard for your critical systems. Its robust cast steel construction, coupled with precise engineering, delivers the reliability needed for uninterrupted marine and industrial operations. We invite you to contact us to discuss how this valve can be tailored to your specific DN and PN requirements, or to request detailed technical data sheets and quotations.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of a dual plate check valve over a single disc swing check valve?
A: The dual plate design is significantly more compact and lighter, leading to easier installation and support. It also features a faster, spring-assisted closure that effectively prevents water hammer, a common issue with slower-closing swing check valves.
Q2: Is this valve suitable for seawater applications?
A: Yes, absolutely. When configured with a cast steel body (like WCB) and stainless steel internals (316), along with appropriate coatings, it offers excellent corrosion resistance for seawater, ballast, and cooling water services.
Q3: Can this valve be installed in any orientation?
A: The wafer dual plate butterfly check valve can typically be installed in horizontal or vertical pipelines with upward flow. For vertical installations with downward flow, consultation with our engineers is recommended to ensure proper function.
Q4: What does "Non-Slam" or "Silent Check" mean for this valve?
A: "Non-Slam" refers to the valve's ability to close its discs rapidly and smoothly just before zero flow velocity is reached, preventing the discs from violently slamming onto the seat. This eliminates loud noise and protects the pipeline from pressure surges.
Q5: Do you offer different seat materials, and how do I choose?
A: Yes, we offer various elastomer seats like EPDM for water, NBR for oil, and Viton for higher temperatures/chemicals. Metal seats are available for high-temperature or abrasive services. Selection depends on your fluid media, temperature, and pressure.
Q6: What is the significance of the CB/T4303 standard?
A: CB/T4303 is a Chinese national professional standard for marine valves. It specifies requirements for design, materials, manufacturing, testing, and marking, ensuring the valve's fitness for marine applications. Valves built to this standard are widely accepted in shipbuilding.
Q7: What is the lead time for an order of DN300, PN2.5 valves?
A: Lead times vary based on order quantity and specific configuration. Generally, for standard materials, production can be completed within a few weeks. We provide accurate lead time estimates upon receipt of your detailed inquiry or purchase order.
Q8: Do you provide documentation like test reports and certificates?
A: Yes. Each valve undergoes rigorous testing. Standard documentation includes a Manufacturer's Data Report, material certificates, and shell/seat test reports. These documents are provided with the shipment.
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