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Home > Industrial Equipment & Components > Valve > Butterfly Valve > JIS F7481 Large Diameter Butterfly Valve for Marine Engine Room Piping, 5K Rating

JIS F7481 Large Diameter Butterfly Valve for Marine Engine Room Piping, 5K Rating

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JIS F7481 Large Diameter Butterfly Valve for Marine Engine Room Piping, 5K Rating photo-5

Product Spotlights

JIS F7481 compliant marine butterfly valve for engine room piping. 5K pressure rating, sizes up to DN1200. Features corrosion-resistant stainless steel disc, resilient seats (EPDM/NBR/PTFE), and manual/actuated operation. Compact, lightweight design saves space. Ideal for seawater, cooling, and ballast systems, ensuring reliable flow control and safety.

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

Key Specifications

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Standard:

JIS F7481

Application:

Other, Marine Engine Room Piping

Pressure Rating:

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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

Application Other, Marine Engine Room Piping

Pressure Rating 5K

Connection Type Wafer or Lug (Optional)

Body Material Cast Iron, Ductile Iron, or Cast Steel

Disc Material Stainless Steel or Ductile Iron

Seat Material EPDM, NBR, or PTFE

Operation Lever, Gear, or Actuator

Size Range DN80 to DN1200 (3“ to 48“)

As a leading valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing robust and reliable fluid control solutions for demanding industrial and marine applications. Our JIS F7481 Large Diameter Butterfly Valve is engineered specifically for the rigorous environment of marine engine room piping systems, offering dependable shutoff and flow control for critical seawater, cooling water, ballast, and bilge lines. Designed to meet the 5K pressure rating standard, this valve combines durable construction with ease of operation, making it an essential component for shipbuilders, repair yards, and vessel operators worldwide. With an annual export value reflecting our global reach across North America, Europe, Asia, and beyond, we are committed to delivering quality valves that ensure operational safety and efficiency on the high seas.

This large diameter butterfly valve is built to withstand the corrosive and high-vibration conditions typical of marine engine rooms. Its design prioritizes longevity, minimal maintenance, and reliable performance under pressure.

Key Features & Technical Advantages:

JIS F7481 Compliance: Manufactured in strict accordance with the Japanese Industrial Standard for ship piping valves, ensuring compatibility and reliability in marine applications.
5K Pressure Rating: Suitable for nominal pressures up to 5 kgf/cm², providing robust performance for various engine room fluid services.
Large Diameter Design: Available in a wide range of sizes from DN80 (3") to DN1200 (48") to accommodate high-flow piping systems.
Corrosion-Resistant Construction: Standard body materials include cast iron with epoxy coating or ductile iron. The disc is typically made from stainless steel (CF8/304 or CF8M/316) for excellent resistance to seawater corrosion.
High-Performance Seat: Features a resilient seat made from EPDM, NBR, or PTFE, providing a bubble-tight seal, low operating torque, and good chemical resistance.
Versatile Operation: Can be supplied with a manual lever, worm gear operator for easier handling of large sizes, or prepared for the installation of pneumatic/electric actuators for remote control.
Compact & Lightweight: Compared to gate or globe valves of similar size, the butterfly valve design offers a significant space and weight saving, a critical factor in ship design.
Bi-Directional Flow: Designed to seal effectively against flow from either direction, simplifying installation and system design.

Technical Specifications Overview:

Parameter	Specification
Design Standard	JIS F7481
Pressure Rating	5K (PN10/PN16 equivalent)
Size Range (Nominal)	DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600 and larger upon request.
Connection	Wafer type (between flanges) or Lug type (threaded inserts for bolting).
Test Standards	Shell Test: 1.5x Rated Pressure; Seat Test: 1.1x Rated Pressure.
Temperature Range	-10°C to +120°C (varies with seat material). EPDM: -20°C to +120°C.

Benefits for Your Marine Operations:

Enhanced System Reliability: Reduces the risk of leaks and failures in critical engine room systems, contributing to vessel safety and uptime.
Reduced Maintenance Costs: Durable materials and a simple design lead to longer service intervals and easier on-board maintenance.
Simplified Inventory: Standard compliance (JIS F7481) means these valves are suitable replacements and upgrades for many existing marine systems.
Operational Efficiency: Quick 90-degree operation allows for fast opening and closing, and the low-pressure drop design minimizes pump energy consumption.
Global Supply Chain Support: With shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing, we ensure timely delivery to shipyards and ports worldwide.

Backed by our ISO9001 certified manufacturing processes, every valve undergoes rigorous quality checks to ensure it meets the promised specifications and performance standards. Our experience serving a diverse global market, from North America and Western Europe to Southeast Asia and Africa, has equipped us with the knowledge to understand the specific needs of marine engineers and procurement specialists. We offer flexible configurations to meet your project's exact requirements, whether for new builds, retrofits, or spare parts. Choose Shanghai Zhibang's JIS F7481 Butterfly Valve for a combination of proven marine-grade design, reliable performance, and competitive value. Contact us today for a detailed quotation, technical datasheets, or to discuss your specific application needs.

Frequently Asked Questions (FAQ):

Q: Is this valve suitable for seawater service?
A: Yes, it is designed for marine applications. When specified with a stainless steel disc (CF8M/316 recommended) and an EPDM seat, it offers good resistance to seawater corrosion. The body's epoxy coating provides additional external protection.
Q: What is the difference between 5K and 10K rating in JIS standards?
A: The "K" rating indicates the pressure class. 5K is suitable for nominal pressures up to 5 kgf/cm² (approx. 0.5 MPa, 71 PSI), while 10K is for up to 10 kgf/cm². For most engine room cooling and ballast lines, 5K is a common and sufficient rating.
Q: Can this valve be operated automatically?
A: Absolutely. The valve can be supplied with a manual operator (lever or gear) or can be prepared with a mounting pad to accommodate a pneumatic or electric actuator for automated control systems. Actuators are available upon request.
Q: Do you offer lug-style valves for end-of-line applications?
A: Yes, we offer both wafer and lug body styles. The lug-style valve has threaded inserts (lugs) on both sides, allowing it to be bolted directly to a flange without needing through-bolts, making it suitable for end-of-line or isolation applications.
Q: What seat material is best for engine room use?
A: EPDM is a common and versatile choice for general seawater, fresh water, and cooling water services up to 120°C. NBR is suitable for oil-based fluids. PTFE offers a wider chemical resistance and temperature range. We can advise based on your specific media.
Q: Are spare parts like seals and discs available?
A: Yes, as the manufacturer, we maintain an inventory of critical spare parts. We recommend keeping spare seals (seats) on board for maintenance purposes, and they can be ordered along with the valve.
Q: What is the typical lead time for large diameter sizes (e.g., DN600)?
A: Lead times vary based on order quantity and specific configuration. Standard large diameter valves may have a lead time of 4-8 weeks. We provide accurate timelines upon order confirmation and prioritize communication for project-critical deliveries.
Q: Does the valve come with certification?
A: Each valve is manufactured under our ISO9001 quality system. Standard documentation includes a material test report and a factory test report. Specific classification society certifications (e.g., ABS, DNV, LR) can be arranged upon request and may incur additional costs and time.