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Help CenterDN50 to DN200 Bronze Wafer Butterfly Check Valve CBT4303 for Shipbuilding
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As a leading manufacturer with a strong presence in the global valve market, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to introduce our high-performance CBT4303 Bronze Wafer Butterfly Check Valve. Designed specifically for demanding marine and shipbuilding applications, this valve offers reliable, maintenance-free backflow prevention in a compact and durable package. With over eight years of expertise since our establishment in 2016, we understand the critical need for corrosion resistance and dependable operation in seawater systems. Our commitment to quality, backed by ISO 9001 certification, ensures that every valve meets the stringent requirements of international shipbuilding standards, providing peace of mind for engineers and procurement managers worldwide.
The CBT4303 series is engineered to deliver superior performance in seawater, cooling, ballast, and other fluid handling systems on vessels. Its primary function is to allow fluid flow in one direction while automatically preventing reverse flow (backflow), protecting pumps, compressors, and other equipment from damage. The wafer-style design allows for easy installation between ANSI or DIN standard flanges, saving significant space and weight compared to traditional swing check valves – a crucial advantage in ship design.
Key Features & Technical Advantages:
- Corrosion-Resistant Bronze Body: Manufactured from high-grade bronze alloy (CAC406 / C95800), offering excellent resistance to seawater corrosion, dezincification, and cavitation, ensuring a long service life in harsh marine environments.
- Compact Wafer Design: Provides a space-saving and lightweight solution. The valve installs directly between pipeline flanges without the need for additional gaskets on the valve face, simplifying installation and reducing overall system weight.
- Spring-Assisted, Quick Closing Disc: The disc is mounted on a stainless steel shaft and assisted by a spring. This design ensures rapid, positive closure upon flow stoppage or reversal, minimizing water hammer and slam, which is critical for system integrity.
- Bubble-Tight Sealing: Features a resilient seat (standard NBR, with EPDM or PTFE options) that provides bubble-tight sealing in the closed position, preventing leakage and ensuring system efficiency.
- Low Pressure Drop: The streamlined disc design offers minimal flow resistance when open, contributing to energy efficiency in pumping systems.
- Maintenance-Free Operation: The simple, robust design with few moving parts and corrosion-resistant materials translates to reliable, long-term operation with minimal need for intervention.
- Multi-Directional Mounting: Can be installed in horizontal or vertical pipelines (with flow direction upward), offering flexibility in system layout and design.
Detailed Technical Specifications:
| Parameter | Specification |
|---|---|
| Product Model | CBT4303 |
| Valve Type | Wafer Butterfly Check Valve (Non-Return Valve) |
| Size Range | DN50 (2"), DN65 (2.5"), DN80 (3"), DN100 (4"), DN125 (5"), DN150 (6"), DN200 (8") |
| Pressure Rating | PN10/16, ANSI Class 125/150 |
| Body Material | Bronze (CAC406 / C95800) |
| Disc Material | Bronze, Optional Nickel Plating or Coatings |
| Shaft Material | Stainless Steel (304 or 316 optional) |
| Seat Material | Standard: NBR (Nitrile). Optional: EPDM, PTFE. |
| Spring Material | Stainless Steel 304/316 |
| Temperature Range | -20°C to 120°C (dependent on seat material) |
| End Connection | Wafer, fits between ANSI/DIN flanges |
| Flow Direction | Unidirectional, marked on valve body |
| Applicable Media | Seawater, Fresh Water, Air, Oils, Weak Corrosive Fluids |
| Standards | Design: API 609, MSS SP-67. Quality: ISO 9001. |
Benefits for Shipbuilders and Marine Engineers:
- Enhanced System Protection: Prevents costly damage to pumps and other equipment by eliminating reverse flow and associated water hammer.
- Space and Weight Optimization: The compact wafer design is ideal for engine rooms and tight spaces, contributing to better vessel weight distribution and fuel efficiency.
- Reduced Maintenance Costs: Durable materials and simple design lead to fewer failures and lower lifecycle costs.
- Simplified Inventory: One valve type can serve multiple applications (cooling, ballast, general service), reducing spare part complexity.
- Global Compliance: Manufactured to widely accepted international standards, facilitating approval for use in ships destined for global markets.
Trust and Global Reach: Shanghai Zhibang Valve has built a reputation for reliability, exporting over US$1 million to US$1.5 million worth of valves annually to a diverse range of markets including North America, South America, Europe, Southeast Asia, Africa, and Oceania. Our products are shipped efficiently from major ports like Shanghai, Guangzhou, and Hong Kong. This global footprint is a testament to the consistent quality and performance of valves like the CBT4303. When you choose this bronze wafer check valve, you are not just buying a component; you are investing in a solution backed by proven manufacturing expertise, a commitment to international quality standards, and a track record of satisfying demanding clients in the shipbuilding industry worldwide. Contact us today for a quotation or to discuss your specific project requirements.
Frequently Asked Questions (FAQ):
Q1: What is the main advantage of a wafer-style check valve over a swing check valve for shipbuilding?
A: The wafer design is significantly more compact and lighter. It installs between flanges, eliminating the need for extra pipe length or support that a swing check valve requires. This saves crucial space and reduces weight in marine applications.
Q2: Can this valve be used with seawater?
A: Yes, absolutely. The bronze body (CAC406/C95800) offers strong resistance to seawater corrosion. For extended life in highly aggressive conditions, options like a nickel-plated disc or 316 stainless steel shaft are available.
Q3: What is the cracking pressure for this valve?
A: The spring-assisted design requires a minimal pressure to open, typically very low (e.g., 0.1-0.2 bar). The specific value can vary slightly by size. This ensures the valve opens easily with forward flow and closes promptly when flow stops.
Q4: Is installation direction critical?
A: Yes. The valve body has an arrow indicating the correct flow direction. It can be installed in horizontal lines or vertical lines where flow is upward. Installation against the arrow or in a vertical downflow line will prevent proper operation.
Q5: Are spare parts like seats and springs available?
A: Yes, we provide comprehensive after-sales support. Common wear parts like resilient seats and springs are available as spare kits. The valve design also allows for relatively straightforward maintenance if required.
Q6: Do you offer different seat materials?
A: Yes. Standard seats are NBR (Nitrile), suitable for water and oils up to 80-90°C. For higher temperatures or different media (e.g., certain chemicals), EPDM or PTFE seats can be specified.
Q7: What flange standards does this valve fit between?
A: The CBT4303 is designed to fit between standard ANSI Class 125/150 or PN10/16 flanges. The face-to-face dimensions comply with API 609 and MSS SP-67 standards for wafer check valves.
Q8: Can this valve handle slurries or fluids with solids?
A: It is primarily designed for clean or mildly dirty fluids. For media with significant solids or fibrous content, a different type of check valve (like a ball check or dual-plate) might be more suitable to prevent clogging or seat damage.
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