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Cast Steel Marine Flanged Butterfly Check Valve, DN50 to DN300, PN16 to PN40 Pressure Rating
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Designed for harsh marine environments, this cast steel butterfly check valve ensures reliable backflow prevention. Features flanged connections (DN50-DN300), pressure ratings up to PN40, and durable material options like WCB steel with NBR/EPDM/PTFE seats. Its compact, low-pressure-drop design offers easy installation and enhances system safety for shipboard piping, backed by ISO9001 manufacturing.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Application:
Other, Marine
Body Material:
ASTM A216 WCB Cast Steel
Disc Material:
ASTM A216 WCB Cast Steel / Stainless Steel 316
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Marine
Body Material
ASTM A216 WCB Cast Steel
Disc Material
ASTM A216 WCB Cast Steel / Stainless Steel 316
Seat Material
NBR / EPDM / PTFE
Pressure Rating
PN16 to PN40
Size Range
DN50 to DN300 (2“ to 12“)
Connection Type
Flanged (RF/FF) per ANSI/ASME B16.5
Operation Type
Wafer / Lug / Double Flanged
Temperature Range
-20°C to +200°C (depends on seat material)
Standards
ISO, DIN, ANSI, JIS, GB
As a leading manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to introduce our robust and reliable Cast Steel Marine Flanged Butterfly Check Valve. Designed specifically for demanding marine and offshore applications, this valve combines the strength of cast steel construction with the efficient flow control of a butterfly check mechanism. Engineered for sizes from DN50 to DN300 and pressure ratings from PN16 to PN40, our valve ensures dependable backflow prevention in critical shipboard systems, from bilge and ballast lines to cooling water and fuel oil services. We understand the uncompromising standards of the maritime industry, which is why every valve is manufactured with precision to deliver long service life and minimal maintenance, even in harsh saltwater environments.
Key Product Features and Technical Advantages:
- Rugged Cast Steel Construction: The valve body and disc are crafted from ASTM A216 WCB cast steel, offering superior mechanical strength, impact resistance, and excellent corrosion resistance, making it ideal for marine use.
- Efficient Butterfly Check Design: The valve utilizes a swinging disc design that opens with forward flow and closes swiftly under reverse flow or zero-flow conditions, preventing water hammer and protecting pumps and equipment.
- Wide Pressure and Size Compatibility: Available in a comprehensive range from DN50 (2") to DN300 (12") and pressure classes PN16, PN25, and PN40, providing versatile solutions for various system requirements.
- Flanged Connection for Secure Installation: Features standard flanged ends (Raised Face or Flat Face) compliant with ANSI/ASME B16.5, DIN, or JIS standards, ensuring leak-proof, bolted connections for easy integration into existing piping.
- Durable and Flexible Sealing Options: The seat is available in NBR, EPDM, or PTFE materials, allowing selection based on fluid media (water, oil, seawater, chemicals) and operating temperature ranges.
- Low Pressure Drop and Compact Design: The streamlined internal geometry ensures minimal flow resistance, optimizing system efficiency. Its wafer or lug style body offers a space-saving design compared to traditional check valves.
- Marine-Grade Surface Treatment: Valves undergo specialized surface preparation and coating (such as epoxy paint) to enhance corrosion protection against salt spray and humid marine atmospheres.
Detailed Technical Specifications:
| Parameter | Specification |
|---|---|
| Design & Type | Flanged Butterfly Check Valve (Wafer/Lug), Swing Type |
| Size Range (Nominal Diameter) | DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300 |
| Pressure Rating (PN) | PN16, PN25, PN40 |
| Body & Disc Material | Primary: ASTM A216 WCB Cast Steel. Optional: Stainless Steel CF8/CF8M (304/316) |
| Stem Material | Stainless Steel 410, 304, or 316 |
| Seat Material | Standard: NBR (Nitrile). Optional: EPDM, PTFE, Viton |
| Flange Standard | ANSI B16.5 Class 150/300, DIN PN16/PN40, JIS 10K/20K, GB |
| Flange Face Type | Raised Face (RF) or Flat Face (FF) |
| Test Standards | Shell Test: 1.5 x PN. Seat Test: 1.1 x PN |
| Operating Temperature | -20°C to +200°C (Max. temp depends on seat material) |
| Applicable Media | Sea Water, Fresh Water, Oils, Air, Weak Chemical Solutions |
Benefits for Your Marine Operations:
- Enhanced System Safety: Prevents reverse flow effectively, safeguarding pumps, compressors, and other upstream equipment from damage.
- Reduced Maintenance Costs: The robust design and quality materials minimize wear, leading to fewer replacements and lower lifetime costs.
- Easy Installation and Inspection: The flanged design allows for straightforward installation between pipe flanges. Some models feature a lug design for end-of-line service or easy removal without disturbing the entire pipeline.
- Global Compliance: Manufactured according to international standards (ISO, DIN, ANSI), facilitating their use in shipbuilding and repair projects worldwide.
- Reliable Performance: Consistent and swift closing action ensures system integrity, even under variable flow conditions common in marine systems.
With over 8 years of manufacturing expertise since 2016 and an annual export value reaching US$1.5 Million, Shanghai Zhibang Valve has established a strong reputation for quality and reliability across continents, serving major markets from North America and Europe to Southeast Asia and Africa. Our ISO9001 certified production process guarantees that every Cast Steel Marine Flanged Butterfly Check Valve meets stringent quality controls before shipment from ports like Shanghai, Guangzhou, or Hong Kong. This valve is not just a component; it's a commitment to the safety and efficiency of your vessel's critical systems. Its durability in harsh conditions translates directly to reduced downtime and increased operational confidence. For a reliable partner in marine fluid control, choose a valve built with proven expertise. Contact us today for detailed quotations, technical data sheets, or to discuss custom requirements for your specific project.
Frequently Asked Questions (FAQ):
-
Q: What is the main advantage of a butterfly check valve over other types for marine use?
A: Butterfly check valves offer a compact, lightweight design with a low-pressure drop, which is crucial for space-constrained shipboard installations. Their simple swinging disc mechanism provides quick response to flow changes, effectively preventing backflow with minimal resistance to forward flow. -
Q: Can this valve be used with seawater?
A: Yes, it is specifically designed for marine applications. When ordered with a cast steel body (WCB) with appropriate epoxy coating and an EPDM or PTFE seat, it provides excellent resistance to corrosion from seawater. Stainless steel options (316) offer even higher corrosion resistance. -
Q: What is the difference between wafer and lug style butterfly check valves?
A: A wafer-style valve is installed between two flanges using longer bolts that pass through both flanges. A lug-style valve has threaded inserts (lugs) on the valve body, allowing it to be bolted directly to each flange independently. The lug style is often preferred for end-of-line service or when a section of pipe needs to be removed without disassembling the entire line. -
Q: How do I select the correct pressure rating (PN16, PN25, or PN40)?
A: The pressure rating must equal or exceed the maximum working pressure of your piping system, including any potential pressure surges. PN16 is suitable for lower pressure services, while PN25 and PN40 are for higher pressure systems. Consult your system design specifications for the required class. -
Q: Are the flanges drilled to specific standards?
A: Yes. We can supply valves with flanges drilled to ANSI, DIN, JIS, or GB standards. Please specify your required flange standard and facing type (RF or FF) when inquiring or placing an order to ensure compatibility with your existing piping. -
Q: What is the lead time for an order of DN150, PN25 valves?
A: Lead times vary based on order quantity and specific configuration (material, seat type). Standard configurations typically have shorter lead times. Please contact our sales team with your detailed requirements for an accurate production and delivery schedule. -
Q: Do you provide testing certificates for the valves?
A: Yes. Each valve undergoes hydrostatic shell and seat tests as per standard practice. Standard test reports are available. Additional certification, such as a material test report (MTR), can be provided upon request. -
Q: Is customization available for special applications?
A: We offer various customization options, including special coatings (like zinc-aluminum), different trim materials, extended stems, or locking devices. Please discuss your specific needs with our engineering team for feasible solutions.
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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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