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Home > Industrial Equipment & Components > Valve > Butterfly Valve > Butterfly Check Valve Designed for Marine Bilge Pump and Cooling Water Pipe Applications

Butterfly Check Valve Designed for Marine Bilge Pump and Cooling Water Pipe Applications

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Butterfly Check Valve Designed for Marine Bilge Pump and Cooling Water Pipe Applications photo-4

Butterfly Check Valve Designed for Marine Bilge Pump and Cooling Water Pipe Applications photo-5

Product Spotlights

Compact wafer-style butterfly check valve engineered for marine bilge pump and cooling water systems. Features spring-assisted quick closure to prevent backflow and water hammer. Constructed from corrosion-resistant materials (ductile iron, stainless steel) with durable elastomer seals (NBR/EPDM). Offers low pressure drop, space-saving design, and installation flexibility (horizontal/vertical). Available in DN50-DN600, PN10-PN25, conforming to major international flange standards.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Application:

Other, Marine Bilge Pump

Body Material:

Ductile Iron, Cast Steel, Stainless Steel

Disc Material:

NBR, EPDM, Viton

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Application Other, Marine Bilge Pump

Body Material Ductile Iron, Cast Steel, Stainless Steel

Disc Material NBR, EPDM, Viton

Connection Type Flanged, Wafer

Nominal Diameter (DN) DN50 to DN600

Pressure Rating (PN) PN10, PN16, PN25

Seal Type Rubber Seated, Metal Seated

Operation Automatic, Spring Assisted

As a leading manufacturer certified to ISO9001 standards, Shanghai Zhibang Valve specializes in providing high-performance fluid control solutions for demanding environments. Our Butterfly Check Valve is engineered specifically for marine bilge pump and cooling water pipe applications, offering reliable, maintenance-free backflow prevention to protect your critical systems and ensure operational continuity. This valve combines robust construction with intelligent design to withstand the harsh conditions of seawater and high-flow scenarios, delivering long-term value and peace of mind for shipbuilders, marine engineers, and system integrators worldwide.

The core value of this valve lies in its ability to provide unidirectional flow control with minimal pressure drop. Unlike traditional swing check valves, the butterfly disc design allows for a more compact installation and faster response time, which is crucial for bilge pump systems where rapid activation is needed. The valve operates automatically, closing under reverse flow conditions to prevent backflow that could damage pumps or contaminate clean water lines in cooling systems.

Key Features and Technical Advantages:

Corrosion-Resistant Construction: Available in a range of materials including ductile iron with epoxy coating, cast steel, and stainless steel (304/316) to suit different fluid compatibilities and environmental conditions, particularly saltwater exposure.
High-Performance Sealing: The disc is sealed with durable elastomers like NBR or EPDM, providing a tight seal even at low pressures. Metal-seated options are available for higher temperature applications.
Spring-Assisted Closure: An integrated spring ensures positive and swift disc closure, minimizing water hammer effects and preventing slamming, which extends the valve's service life.
Compact Wafer Design: The wafer-style body allows for installation between standard pipe flanges, saving significant space and weight compared to flanged check valves—a critical advantage in space-constrained marine applications.
Low Flow Resistance: The streamlined disc design creates minimal turbulence and pressure loss when open, optimizing pump efficiency and reducing energy consumption.
Versatile Mounting: Can be installed in both horizontal and vertical pipelines (with flow direction upward), providing flexibility in system layout.

Technical Specifications Table:

Parameter	Specification
Nominal Diameter (DN)	DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600
Pressure Rating (PN)	PN10, PN16, PN25 (Customizable)
Body Material	Ductile Iron (GGG40), Cast Steel (WCB), Stainless Steel (CF8/CF8M)
Disc Material	Stainless Steel with NBR/EPDM/Viton Lining, Full Stainless Steel
Seat Material	NBR, EPDM, Viton, PTFE, Metal
Connection Standard	ISO, ANSI, JIS, DIN, BS Flanges; Wafer Type
Temperature Range	-10°C to +120°C (Rubber Seated), up to +425°C (Metal Seated)
Medium	Sea Water, Fresh Water, Cooling Water, Oily Water, Air, Non-corrosive Fluids

Benefits for Your Operations:

Enhanced System Protection: Prevents backflow into bilge pumps or cooling systems, avoiding pump damage, motor burnout, and system contamination.
Reduced Maintenance Costs: The simple, robust design with few moving parts minimizes wear and the need for frequent servicing, lowering total cost of ownership.
Improved Safety and Reliability: Automatic operation ensures fail-safe protection without manual intervention, crucial for unmanned engine rooms or automated systems.
Space and Weight Savings: The compact wafer design is ideal for retrofit projects or new builds where every kilogram and cubic centimeter counts.
Global Compliance: Manufactured under ISO9001 quality management systems, with dimensions and pressure ratings conforming to major international standards, facilitating global procurement and installation.

With an established track record since 2016 and annual exports valued between US$1 Million to US$1.5 Million, Shanghai Zhibang Valve has earned the trust of partners across North America, South America, Europe, Asia, Africa, and Oceania. Our products are shipped efficiently from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery to your project site. Choosing our Butterfly Check Valve means partnering with a dedicated manufacturer committed to quality, reliability, and customer-specific solutions for marine and industrial applications. Contact us today to discuss your requirements and receive a detailed quotation.

Frequently Asked Questions (FAQ):

Q: What is the main advantage of a butterfly check valve over a swing check valve for marine use?
A: Butterfly check valves offer a more compact design, faster closing action to minimize water hammer, and lower pressure drop. Their wafer style fits between flanges, saving significant space and weight compared to the longer body of a swing check valve, which is a major benefit in tight engine room spaces.
Q: Can this valve handle seawater and other corrosive media?
A: Yes. We offer body materials like epoxy-coated ductile iron or stainless steel (304/316) and compatible seal materials (EPDM, Viton) specifically to resist corrosion from seawater, bilge water, and cooling water with additives.
Q: Is the valve suitable for vertical installation?
A: Yes, it can be installed in vertical pipelines provided the flow direction is upward. The spring-assisted closure ensures reliable operation regardless of orientation.
Q: What pressure ratings are available?
A: Standard pressure ratings are PN10, PN16, and PN25. Higher pressure classes or custom ratings can be engineered based on your specific system design pressure.
Q: Do you provide certificates for the materials and testing?
A: As an ISO9001 certified manufacturer, we can provide material test certificates (MTC) and can perform hydrostatic tests upon request. Final inspection reports are available for review.
Q: What is the lead time for standard sizes?
A: For standard DN sizes and common material combinations, lead times are typically 4-6 weeks. We maintain some inventory for popular items; please inquire for specific availability.
Q: Can the valve be customized for non-standard flange standards or special coatings?
A: Yes. We offer customization for flange standards (ANSI, JIS, BS, DIN), special epoxy or rubber coatings for extra corrosion protection, and different seal materials to match your fluid properties.
Q: What maintenance does the valve require?
A: Designed for minimal maintenance. Periodic visual inspection for external corrosion and checking for any leakage is recommended. The valve has no external linkages or grease points, simplifying upkeep.