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CB/T4303 Marine Butterfly Check Valve, 316 Stainless Steel Body, DN50-DN600, PN10-PN40
Product Spotlights
Marine-grade 316 stainless steel butterfly check valve designed per CB/T4303 standard. Features non-slam closure to prevent water hammer, available in DN50-DN600 sizes and PN10-PN40 pressures. Compact wafer/lug design saves space and weight. Ideal for seawater, ballast, and cooling systems on ships and offshore platforms, offering corrosion resistance and low maintenance.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Material:
316 Stainless Steel Body & Disc
Size Range:
DN50 to DN600
Pressure Rating:
PN10 to PN40
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
316 Stainless Steel Body & Disc
Size Range
DN50 to DN600
Pressure Rating
PN10 to PN40
Valve Type
Butterfly Check Valve
Application
Marine & Offshore Fluid Systems
Operation
Automatic, Non-Slam Check
Connection Type
Wafer or Lug (Optional)
Seat Material
EPDM, NBR, FKM (Optional)
Standard
CB/T 4303 Marine Standard
As a leading manufacturer with a strong foundation in quality and precision, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our CB/T4303 Marine Butterfly Check Valve. Engineered specifically for the demanding environments of marine and offshore applications, this valve combines the superior corrosion resistance of 316 stainless steel with a reliable, non-slam check mechanism. Our commitment to the ISO9001 quality management system ensures that every valve delivers consistent performance, safeguarding your critical piping systems against backflow and pressure surges. Trust in our expertise, honed since 2016, to provide a solution that enhances operational safety and reduces maintenance costs.
This valve is designed for efficiency and durability in seawater, ballast, cooling, and other shipboard fluid systems.
Core Product Features & Technical Advantages:
- Superior Material Construction: The body and disc are crafted from 316 stainless steel, offering exceptional resistance to pitting and crevice corrosion in chloride-rich marine environments, far outperforming standard 304 stainless steel.
- Non-Slam, Low-Pressure Drop Design: The butterfly-style disc design ensures smooth, automatic closure upon flow reversal, preventing water hammer and protecting downstream equipment. Its streamlined profile minimizes flow resistance, enhancing system efficiency.
- Wide Range of Sizes and Pressures: Available from DN50 to DN600 and pressure classes PN10 to PN40, this valve series can be tailored to fit a vast array of system requirements, from auxiliary lines to main pipelines.
- Compliant with Marine Standards: Manufactured in accordance with the CB/T 4303 standard, ensuring it meets the specific performance and material requirements for marine use.
- Flexible Sealing Options: The seat is available in various elastomers like EPDM, NBR, or FKM, allowing customization based on fluid media (water, oil, chemicals) and temperature range.
- Compact and Lightweight: The wafer or lug design provides a space-saving and weight-reducing solution compared to traditional swing check valves, crucial for shipboard weight management.
- Low Maintenance: Simple design with minimal moving parts translates to reduced wear, lower lifecycle costs, and ease of inspection.
Detailed Technical Specifications:
| Parameter | Specification |
| Product Standard | CB/T 4303 |
| Valve Type | Butterfly Check Valve (Dual-Plate) |
| Body & Disc Material | 316 Stainless Steel (CF8M) |
| Size Range (Nominal Diameter) | DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600 |
| Pressure Rating (PN) | PN10, PN16, PN25, PN40 |
| Connection Type | Wafer or Lug Style (Optional) |
| Seat Material | EPDM (Standard), NBR, FKM (Optional) |
| Temperature Range | -20°C to +130°C (Depends on seat material) |
| Suitable Media | Seawater, Fresh Water, Oils, Chemicals (compatible with seat) |
Benefits for Your Operations:
- Enhanced System Safety: Prevents dangerous backflow, protecting pumps and other equipment.
- Improved Reliability: 316 SS construction ensures long service life even in harsh, salty conditions.
- Operational Cost Savings: Reduced risk of water hammer damage and lower maintenance frequency directly impact your bottom line.
- Design Flexibility: The broad size and pressure range allow for standardized procurement across different vessel systems.
With an annual export value reflecting our global reach and trust from partners in North America, Europe, Asia, and beyond, Shanghai Zhibang has proven its capability to deliver quality marine valves worldwide. Our products ship efficiently from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring timely delivery to your project. Choosing our CB/T4303 Butterfly Check Valve means selecting a component backed by rigorous ISO9001 manufacturing processes, designed for the specific challenges of marine applications, and supported by a manufacturer with a solid track record. Contact us today to discuss how this valve can be integrated into your next marine project or to request a detailed quotation.
Frequently Asked Questions (FAQ)
-
Q: What is the main advantage of a butterfly check valve over a traditional swing check valve?
A: The butterfly (or dual-plate) check valve offers a more compact design, lighter weight, faster closure to prevent water hammer, and typically has a lower pressure drop, making it ideal for space-constrained marine applications. -
Q: Why is 316 stainless steel specified for this marine valve?
A: 316 stainless steel contains molybdenum, which significantly increases its resistance to corrosion from chlorides (like seawater), making it a standard and reliable choice for marine environments compared to 304 stainless steel. -
Q: Can this valve be used for fluids other than seawater?
A: Yes. By selecting the appropriate seat material (EPDM, NBR, FKM), the valve can handle a variety of media including fresh water, oils, fuels, and certain chemicals, within the temperature limits of the seat. -
Q: What does the "PN" rating (PN10-PN40) signify?
A: "PN" stands for Pressure Nominale. It indicates the maximum allowable working pressure in bars at room temperature. For example, PN16 valves are rated for 16 bar pressure. The suitable PN rating should be selected based on your system's maximum operating pressure. -
Q: What is the difference between wafer and lug type connections?
A: A wafer-style valve is installed between two flanges using longer bolts. A lug-style valve has threaded inserts (lugs) on both sides, allowing it to be installed using bolts only on one side, which can be beneficial for end-of-line connections or easier maintenance. -
Q: Is this valve suitable for vertical pipe installation?
A: Yes, butterfly check valves are generally suitable for installation in both horizontal and vertical pipelines (with upward flow). It is recommended to consult the installation manual for specific orientation guidelines. -
Q: Do you provide customization for non-standard sizes or special coatings?
A: As a manufacturer, we can discuss custom requirements. While DN50-DN600 and PN10-PN40 are our standard range, modifications or special coatings like electropolishing may be available upon request, subject to feasibility and quantity. -
Q: What is included with the valve delivery?
A: Typically, the valve is supplied as a single unit. Installation bolts, gaskets, and other accessories are generally not included unless specifically ordered as part of a package. Detailed packaging and delivery terms can be confirmed in the sales contract.
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1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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