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Home > Industrial Equipment & Components > Valve > Butterfly Valve > Corrosion Resistant Butterfly Valve DN50-DN300 for Marine Sewage JIS F7481

Corrosion Resistant Butterfly Valve DN50-DN300 for Marine Sewage JIS F7481

Corrosion Resistant Butterfly Valve DN50-DN300 for Marine Sewage JIS F7481 thumbnail-3

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Corrosion Resistant Butterfly Valve DN50-DN300 for Marine Sewage JIS F7481 photo-4

Corrosion Resistant Butterfly Valve DN50-DN300 for Marine Sewage JIS F7481 photo-5

Product Spotlights

JIS F7481 compliant marine butterfly valves (DN50-DN300) built with corrosion-resistant materials like SS316 for reliable performance in seawater and sewage systems. Features robust sealing (EPDM/PTFE seats), low-torque operation, and optional automation. ISO9001 certified manufacturing ensures quality for global marine projects, offering durability and reduced lifecycle costs.

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

Key Specifications

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Standard:

JIS F7481 compliant

Application:

Other, Marine sewage systems

Material:

Corrosion-resistant alloy (e.g., CF8M, WCB)

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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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Standard JIS F7481 compliant

Application Other, Marine sewage systems

Material Corrosion-resistant alloy (e.g., CF8M, WCB)

Size Range DN50 to DN300

Connection Type Wafer, Lug, or Flange

Seat Material EPDM, NBR, or PTFE

Body Coating Epoxy coating or optional galvanization

Operation Lever, Gear, or Pneumatic/Electric Actuator

Pressure Rating PN10, PN16, or Class 150

Temperature Range -10°C to +120°C (depending on seat)

As a leading manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve is proud to introduce our specialized line of Corrosion Resistant Butterfly Valves designed explicitly for demanding marine sewage applications. Engineered to meet the rigorous JIS F7481 standard, these valves offer reliable flow control in harsh saline environments, ensuring long-term system integrity and operational safety for vessels and offshore platforms. Our focus on robust materials and precise manufacturing translates into a product that minimizes maintenance downtime and maximizes service life, providing a cost-effective solution for shipbuilders and marine engineers worldwide.

Our valves are engineered to tackle the unique challenges of marine environments. The key features include:

Superior Corrosion Resistance: The valve body is typically constructed from materials like CF8M (SS316) stainless steel or coated carbon steel (WCB with epoxy), offering exceptional resistance to saltwater, sewage, and aggressive chemicals.
JIS F7481 Compliance: Manufactured in accordance with Japanese Industrial Standard F7481 for marine butterfly valves, ensuring dimensional accuracy, performance reliability, and interchangeability for international marine projects.
Robust Seat Design: Available with resilient seats made from EPDM, NBR, or PTFE, providing a tight bubble-tight seal, excellent wear resistance, and compatibility with a wide fluid temperature range.
Versatile Actuation: Can be operated manually via lever or gearbox, or automated with pneumatic or electric actuators for remote control and integration into ship automation systems.
Low Torque Operation: The disc design and bearing system ensure smooth, low-torque operation, reducing wear on the actuator and extending the valve's operational life.
Compact & Lightweight: The wafer or lug design offers a space-saving and lightweight solution compared to gate valves, ideal for the confined spaces onboard ships.

The technical specifications for our standard range are summarized below. Custom configurations upon request.

Parameter	Specification
Size Range (DN)	50, 65, 80, 100, 125, 150, 200, 250, 300
Pressure Rating	PN10, PN16 (Standard), Class 150 (Optional)
Body Material	CF8M (SS316), WCB (Epoxy Coated), Ductile Iron (Optional)
Disc Material	SS316, CF8M, Nylon Coated, Optional Alloys
Stem Material	SS416, SS316, with Corrosion Protection
Seat Material	EPDM (Standard for water/sewage), NBR, PTFE (for chemicals)
Connection	Wafer, Lug, Flange (RF, FF as per standard)
Operation Temp.	-10°C to +120°C (EPDM), up to +200°C (PTFE)

Choosing our butterfly valves brings tangible benefits to your marine projects:

Enhanced System Reliability: Reduces the risk of valve failure due to corrosion, preventing costly leaks and system contamination in sensitive marine sewage systems.
Reduced Lifecycle Cost: The durable construction and corrosion resistance lead to lower maintenance frequency and part replacement costs over the valve's extended lifespan.
Global Compliance: Adherence to JIS F7481 facilitates acceptance in shipyards and marine projects across Asia and other regions that recognize this standard.
Operational Efficiency: Easy operation and reliable sealing ensure efficient flow control, contributing to the smooth functioning of onboard waste management systems.
Flexibility: Available in sizes from DN50 to DN300 and various end connections, they can be tailored to fit specific piping layouts and system requirements.

Backed by our ISO9001 certification and nearly a decade of manufacturing expertise since 2016, Shanghai Zhibang Valve guarantees consistent product quality and performance. Our valves are trusted in a diverse range of markets, from North America and Europe to Southeast Asia and Africa, supported by an annual export volume of $1-1.5 million. We offer flexible shipment from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing to ensure timely delivery. For a robust, compliant, and cost-effective solution for your marine sewage and seawater applications, our Corrosion Resistant Butterfly Valves stand ready to deliver. Contact us today for detailed quotations, technical data sheets, or to discuss your specific project needs.

Frequently Asked Questions (FAQ):

Q: What does "JIS F7481" mean, and why is it important for marine valves?
A: JIS F7481 is a Japanese Industrial Standard specifically for marine butterfly valves. It defines dimensions, materials, pressure ratings, and testing requirements. Compliance ensures the valve is suitable for marine service, offers reliable performance, and is often required or preferred by shipyards, especially in Asian markets.
Q: Can this valve handle both seawater and sewage?
A: Yes, it is designed for such applications. The corrosion-resistant materials (like SS316) protect against seawater, while the resilient seat materials (like EPDM) are suitable for sewage and wastewater, offering good chemical resistance.
Q: What are the main differences between Wafer and Lug type connections?
A: A Wafer valve is installed between two flanges using long bolts. A Lug-style valve has threaded inserts (lugs) on both sides, allowing it to be bolted directly to each flange, which can be beneficial for end-of-line service or easier maintenance.
Q: Are actuators available for these valves?
A: Yes. We offer optional pneumatic (on/off or modulating) and electric actuators. The valve design is compatible with various actuator brands and types for automated flow control.
Q: What is the typical lead time for an order of DN150 valves?
A: Lead time depends on quantity and specific configuration. For standard DN150 valves with EPDM seat and lever operation, we typically have stock or can produce within 2-4 weeks. Please inquire for an exact schedule.
Q: Do you provide documentation like material certificates and test reports?
A: Yes. As an ISO9001 certified manufacturer, we can provide standard documentation, including material test certificates (MTC) and factory test reports (hydrostatic test, seat leakage test) upon request.
Q: Is the epoxy coating sufficient for submerged seawater service?
A: The standard epoxy coating offers good protection. For fully submerged or highly aggressive service, we recommend specifying higher-grade materials like solid stainless steel (CF8M) or discussing enhanced coating options.
Q: Can you supply valves with flanges matching specific standards like ANSI or DIN?
A: Absolutely. While compliant with JIS F7481 dimensions, we can often supply valves with flanges drilled to other common standards like ANSI B16.5 or DIN. Please specify your flange requirements when inquiring.