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Home > Industrial Equipment & Components > Valve > Butterfly Valve > JIS F7481 Large Diameter Butterfly Valve for Seawater Cooling Systems, DN300-DN800

JIS F7481 Large Diameter Butterfly Valve for Seawater Cooling Systems, DN300-DN800

JIS F7481 Large Diameter Butterfly Valve for Seawater Cooling Systems, DN300-DN800 thumbnail-3

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JIS F7481 Large Diameter Butterfly Valve for Seawater Cooling Systems, DN300-DN800 photo-1

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JIS F7481 Large Diameter Butterfly Valve for Seawater Cooling Systems, DN300-DN800 photo-4

JIS F7481 Large Diameter Butterfly Valve for Seawater Cooling Systems, DN300-DN800 photo-5

Product Spotlights

JIS F7481 compliant large diameter butterfly valves (DN300-DN800) specifically engineered for seawater cooling systems. Features corrosion-resistant construction, customizable seat materials (EPDM/PTFE), and multiple actuation options. Enhances system reliability in harsh marine environments, reduces maintenance costs, and is backed by ISO9001 certified manufacturing and global supply experience.

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

Key Specifications

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Standard:

JIS F7481

Application:

Other, Seawater Cooling Systems

Size Range:

DN300 - DN800

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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
Company Profile
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Standard JIS F7481

Application Other, Seawater Cooling Systems

Size Range DN300 - DN800

Material Corrosion-resistant alloy (customizable)

Seat Type Optional EPDM or PTFE

Operation Manual, gearbox, or actuator (available)

Connection Flanged (standard)

Pressure Rating Customizable based on system requirements

Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016, specializes in producing high-performance industrial valves for demanding applications. Our JIS F7481 Large Diameter Butterfly Valves are engineered specifically for seawater cooling systems, offering a reliable and durable solution for flow control in corrosive marine environments. With an annual export value reflecting our global reach, we understand the critical need for valves that withstand harsh conditions while ensuring operational efficiency.

This valve series is designed to meet the rigorous requirements of cooling water intake, distribution, and discharge in power plants, shipbuilding, offshore platforms, and coastal industrial facilities. The core value lies in its robust construction, excellent sealing performance under varying pressures, and long service life even with continuous exposure to seawater, helping clients minimize maintenance costs and downtime.

Detailed Product Features & Specifications:

Compliance with JIS F7481: Manufactured according to Japanese Industrial Standards for valves used in seawater systems, ensuring dimensional accuracy, material suitability, and performance benchmarks.
Optimized for Corrosive Media: Key components are made from or coated with specially selected corrosion-resistant alloys to combat the aggressive nature of seawater, including chlorides and sulfates.
Large Diameter Range: Available from DN300 (approx. 12 inches) to DN800 (approx. 32 inches), catering to high-flow applications common in main cooling lines.
Flexible Seating Options: The valve seat can be configured with materials like EPDM for general seawater use or PTFE for enhanced chemical resistance and lower friction, depending on specific water chemistry and temperature.
Multiple Actuation Methods: Designed to accommodate manual handwheel operation, gearbox for easier handling of large sizes, or connection to pneumatic/electric actuators for automated control systems.
Flanged Connection Design: Standard flanged ends facilitate secure installation and alignment with piping systems, complying with common flange standards.
Low Torque Operation: The disc design and bearing arrangement aim to reduce operating torque, making manual or actuated operation smoother and less strenuous.
Bubble-Tight Shut-off (Optional): Depending on the seat material and design precision, the valve can achieve bubble-tight shut-off, crucial for system isolation during maintenance.

Technical Parameters Table (Representative):

Parameter	Details / Range
Nominal Diameter (DN)	300, 350, 400, 450, 500, 600, 700, 800
Pressure Rating	Customizable; typical design for low to medium pressure cooling systems
Body Material	Cast steel with corrosion-resistant coating or alloy (e.g., Ni-Al bronze) available upon request
Disc Material	Similar corrosion-resistant alloy, often coated
Seat Material Options	EPDM, PTFE, or other specified elastomers
Operation Type	Manual lever, gear operator, or actuator compatible
End Connection	Flanged, dimensions per standard flange tables
Testing Standard	Factory testing per applicable standards for sealing and operation

Advantages & Client Benefits:

Enhanced System Reliability: Reduces risk of valve failure due to corrosion, leading to more stable cooling system operation.
Cost-Effective Maintenance: Durable materials extend service intervals, lowering long-term operational expenses.
Simplified Installation & Operation: Standard flanges and optional actuation methods integrate easily into new or existing systems.
Adaptability: Customizable material and seat options allow the valve to be tailored to the specific seawater conditions of your project.
Global Supply Capability: Supported by our manufacturing base in Shanghai and multiple shipment ports, ensuring timely delivery to markets worldwide.

Backed by our ISO9001 certification, Shanghai Zhibang Valve ensures consistent quality management in every production step. Our annual export value of US$1 Million to US$1.5 Million demonstrates successful supply to diverse markets including North America, Europe, Asia, Africa, and Oceania – regions where seawater cooling is prevalent. This global experience means we understand regional requirements and environmental challenges. Choosing our JIS F7481 butterfly valve provides not just a product, but a solution backed by proven manufacturing expertise and international logistics support. We encourage you to contact us for detailed specifications, pricing, or to discuss customization for your specific DN300-DN800 seawater cooling application.

Frequently Asked Questions (FAQ):

Q: What does "JIS F7481" mean for this valve?
A: JIS F7481 is a Japanese Industrial Standard specifying requirements for valves intended for seawater service. It covers materials, dimensions, pressure ratings, and performance criteria to ensure suitability for corrosive marine environments.
Q: Can this valve handle other corrosive fluids besides seawater?
A: Yes, the corrosion-resistant construction makes it suitable for other aggressive media like certain chemical solutions or brackish water, but the specific compatibility should be verified based on the fluid's composition.
Q: Are actuators included, or how are they specified?
A: Actuators are typically not included as standard but are available as an option. We can provide compatible pneumatic or electric actuators based on your control system requirements and torque calculations.
Q: What is the typical delivery time for DN600 or DN800 sizes?
A: Delivery time depends on order quantity and customization. Standard models in large diameters may have a longer lead time than smaller sizes; we provide estimated timelines upon quotation.
Q: How do I choose between EPDM and PTFE seat material?
A: EPDM is generally suitable for standard seawater temperatures and offers good elasticity. PTFE provides superior chemical resistance and can handle higher temperatures but may have different sealing characteristics. Selection depends on your system's temperature, pressure, and specific water chemistry.
Q: Does the valve come with any specific warranty or guarantee?
A: We provide a warranty against manufacturing defects. The warranty period and terms are detailed in our sales contract and are based on proper installation and use within specified operating conditions.
Q: Can you provide custom flange standards if our piping uses a different standard than JIS?
A: Yes, flange dimensions can often be customized to match other common standards like ANSI, DIN, or GB, upon request. This ensures compatibility with your existing piping.
Q: What documentation is provided with the valve?
A> Standard documentation includes a material certificate, test report (for performed tests), and installation/maintenance manual. Additional certificates can be provided if requested.