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Help CenterJIS F7481 Standard Butterfly Valve DN50-DN300 5K Pressure for Marine Applications
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Shanghai Zhibang Valve Manufacture Co., Ltd., founded in 2016 and located in Shanghai, China, is a professional manufacturer specializing in valves for marine and industrial applications. We proudly introduce our JIS F7481 Standard Butterfly Valve DN50-DN300 5K Pressure for Marine Applications, which is designed to meet the rigorous requirements of shipbuilding and offshore systems. With over US$1 million annual export value and ISO9001 certification, we ensure every valve delivers reliable performance and long service life.
This butterfly valve conforms to the Japanese Industrial Standard JIS F7481, specifically tailored for 5K pressure rating (approximately 0.5 MPa). Its compact design and lightweight structure make it ideal for seawater cooling, ballast water treatment, fire-fighting, and other marine piping systems. Available in sizes from DN50 to DN300, it offers flexibility for various pipeline diameters.
The valve features a robust body, resilient seat, and corrosion-resistant disc, ensuring excellent sealing performance and low torque operation. It can be supplied with lever handle, gearbox, or pneumatic/electric actuator for manual or automated control. All materials are selected for marine environments, including optional stainless steel disc and EPDM seat for seawater resistance.
Key Features & Technical Specifications
- Compliance: Manufactured according to JIS F7481 standard, suitable for 5K (0.5 MPa) working pressure.
- Size Range: DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300 – full coverage for marine pipe systems.
- Body Materials: Cast iron (FC) or ductile iron (FCD) with epoxy coating for anti-corrosion.
- Disc Materials: Stainless steel (CF8M) or ductile iron with nickel plating – optional to suit media.
- Seat Materials: EPDM (for seawater/hot water), NBR (for oil and fuel), or PTFE (for chemicals) – customizable.
- Operation: Lever handle (standard for up to DN200), gearbox (for larger sizes or high torque), or actuator (electric/pneumatic) available.
- Connection Type: Wafer type (between flanges) or lug type (for single flange isolation) – both comply with JIS 10K/5K bolt patterns.
- Test Pressure: Shell test 1.5× rated pressure, seat test 1.1× rated pressure.
| Parameter | Value |
|---|---|
| Standard | JIS F7481 |
| Pressure Rating | 5K (0.5 MPa) |
| Size Range | DN50 – DN300 |
| Face-to-Face Dimension | Per JIS B2002 (wafer type) |
| Flange Drilling | JIS 5K flange compatible |
| Temperature Range | -10°C to +80°C (EPDM seat); up to 120°C (PTFE seat) |
| Applicable Media | Seawater, fresh water, ballast water, fuel oil, lube oil, air |
Our butterfly valves undergo strict quality control during production, including 100% pressure testing and dimensional inspection. The ISO9001 certified management system ensures consistent product quality, traceability, and continuous improvement. Each valve is individually tested and provided with a test certificate.
The JIS F7481 butterfly valve offers distinct advantages for marine applications: its compact footprint saves space in pipe corridors; the resilient seat provides bubble-tight shut-off even under low pressure; and the optional actuator compatibility allows integration with ship automation systems. Compared to gate valves or globe valves, the butterfly valve’s quarter-turn operation reduces installation height and weight.
We also supply complementary accessories such as limit switch boxes, solenoid valves, and positioners for remote control. Customization options include special coatings, extended stems for insulated pipes, and counterweight mechanisms for emergency closure.
Trust & Reliability
Shanghai Zhibang Valve Manufacture Co., Ltd. has served multiple international markets including North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Middle East, East Asia, Western Europe, Central America, Northern Europe, Southern Europe, South Asia, and the domestic Chinese market. Our products are exported from major ports: Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring convenient logistics.
With annual export value between US$1 million and US$1.5 million, we have built a stable partnership with shipyards, engineering companies, and valve distributors worldwide. Our technical team provides responsive support for selection, installation, and maintenance. Every order is backed by our commitment to quality and on-time delivery.
Choose Shanghai Zhibang for your marine valve needs. Contact us today for a quotation or technical datasheet. We look forward to contributing to your successful marine projects.
Frequently Asked Questions
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Q: What is the difference between JIS F7481 and other standards (e.g., JIS B2032)?
A: JIS F7481 is a marine-specific standard for butterfly valves, while JIS B2032 is for general industrial butterfly valves. F7481 includes additional requirements for materials, face-to-face dimensions, and testing for marine environments. -
Q: Can this valve be used for potable water?
A: Yes, if the seat material is EPDM or PTFE approved for drinking water. Please specify when ordering so we can provide appropriate material certificates. -
Q: What actuator options do you offer for remote operation?
A: We offer pneumatic (double-acting or spring-return) and electric actuators (24V DC, 220V AC, etc.). The valve can be prepared with ISO5211 mounting pad for direct coupling. -
Q: Is the valve suitable for horizontal or vertical installation?
A: The wafer-type butterfly valve can be installed in any orientation. For vertical piping with heavy disc, proper support is recommended for large sizes. -
Q: What is the lead time for DN150 size?
A: Standard sizes (DN50-DN200) are usually in stock or have a lead time of 15-25 days depending on quantity. Larger sizes or customized orders may require 30-45 days. -
Q: Do you provide a warranty?
A: Yes, we offer a 12-month warranty from the date of shipment covering manufacturing defects. Extended warranty is available upon request. -
Q: How do I select the correct seat material for my application?
A: For seawater: EPDM is recommended. For fuel oil or hydrocarbons: NBR. For high temperature or aggressive chemicals: PTFE. Our sales engineers can assist with selection. -
Q: Can you supply with special flange drilling (e.g., PN10)?
A: Our standard product is designed for JIS 5K flange drilling. For other flange standards, we offer custom modifications—please contact us with your requirements.
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