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Help CenterJIS F7481 Butterfly Valve for Marine HVAC Ducting, Cast Iron Body, EPDM Liner, Temperature Range -10°C to 120°C
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As a professional manufacturer with a strong foundation since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing reliable and high-performance fluid control solutions for demanding industrial and marine applications. Our JIS F7481 Butterfly Valve is engineered specifically for marine HVAC ducting systems, where dependable operation and long service life are paramount. This valve combines a robust cast iron body with a high-quality EPDM liner, ensuring excellent sealing and durability in a wide temperature range from -10°C to 120°C. Designed to meet the rigorous standards of the maritime industry, it offers a cost-effective and efficient solution for regulating airflow in ship ventilation and air conditioning networks.
The valve's construction is tailored for the challenging marine environment. The cast iron body provides exceptional strength and corrosion resistance, essential for withstanding salty, humid conditions. The EPDM (Ethylene Propylene Diene Monomer) liner serves as the sealing element, offering superior resilience, excellent resistance to aging, ozone, and a broad range of temperatures. This combination ensures a tight seal and smooth, low-torque operation over thousands of cycles.
Key Features and Technical Advantages:
- JIS F7481 Compliance: Manufactured in strict accordance with Japanese Industrial Standard F7481 for ship piping valves, guaranteeing compatibility and reliability for marine applications.
- Optimized for HVAC Ducting: The disc design and liner profile are optimized for minimal pressure drop and efficient airflow control in ventilation and air conditioning ducts.
- Wide Temperature Suitability: The -10°C to 120°C operational range makes it suitable for both standard HVAC and potentially higher-temperature air handling applications onboard.
- Versatile Actuation Options: Available with a manual lever for quick operation, a gearbox for easier handling of larger sizes, or prepared for the installation of pneumatic/electric actuators for automated control systems.
- Compact and Lightweight Design: Compared to other valve types, the butterfly valve design offers a space-saving and weight-saving advantage, crucial in ship design.
- Easy Maintenance: The resilient seated design typically allows for seat replacement without removing the valve body from the pipeline, reducing downtime and maintenance costs.
Technical Specifications Table:
| Parameter | Specification |
| Product Standard | JIS F7481 |
| Body Material | Cast Iron (GG25/GGG40) |
| Disc Material | Ductile Iron / Carbon Steel (Epoxy Coated) |
| Seat/Liner Material | EPDM (Standard), NBR, Viton available |
| Stem Material | Stainless Steel (AISI 420/304) |
| Temperature Range | -10°C to +120°C (with EPDM) |
| Pressure Rating | PN10, PN16 (10/16 bar) |
| Size Range (Nominal Diameter) | DN50 to DN600 (2" to 24") |
| Connection Type | Wafer (Standard), Lug (Optional) |
| Leakage Class | Zero Leakage (Bubble-tight sealing possible) |
Benefits for Your Marine Projects:
- Enhanced System Reliability: Reduces the risk of HVAC system failure due to valve malfunction, ensuring consistent environmental control onboard.
- Reduced Lifetime Cost: Durable materials and easy maintenance lead to lower total cost of ownership compared to valves requiring frequent replacement.
- Simplified Procurement & Installation: Compliance with a recognized marine standard (JIS F7481) simplifies specification and approval processes for shipyards and operators.
- Operational Flexibility: Suitable for both isolation and throttling duties within its specified range, providing versatile control over air flow.
Frequently Asked Questions (FAQ):
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Q: Is this valve suitable for freshwater or seawater cooling systems?
A: While designed for HVAC ducting (air service), the cast iron body with proper epoxy coating can handle certain water applications. However, for dedicated seawater cooling lines, valves with more corrosion-resistant body materials like bronze or stainless steel are recommended. Please consult our engineers for specific media compatibility. -
Q: Can you provide valves with different seat materials other than EPDM?
A: Yes. While EPDM is the standard for its wide temperature range and good general properties, we can offer NBR (Nitrile) for better oil resistance or FKM (Viton) for higher temperature and chemical resistance upon request. -
Q: What is the lead time for standard sizes?
A: For standard sizes (DN50-DN300) in standard configuration, we typically maintain stock or can deliver within 15-30 days. Larger sizes or custom configurations may require 30-45 days. Exact lead times will be confirmed with your order. -
Q: Do you offer actuated versions of this valve?
A: Absolutely. The valve can be supplied as a manual unit, or it can be pre-fitted with pneumatic (on/off or modulating) or electric actuators. We can provide a complete package including brackets and couplings. -
Q: How does the JIS F7481 standard compare to other standards like ISO or ANSI?
A: JIS F7481 is a Japanese standard specifically for valves used in ship piping. It defines dimensions, materials, pressure-temperature ratings, and testing requirements suitable for marine environments. It is widely accepted and recognized in the global shipbuilding industry, often considered equivalent in performance to other major standards for similar applications. -
Q: What kind of testing do these valves undergo?
A: Our valves undergo routine factory tests including shell strength test, seat leakage test (both under water and air), and operational torque test. Certificates of compliance and test reports can be provided. -
Q: Can you provide valves with different end connections, like flanged ends?
A: The standard design is wafer or lug type for installation between flanges. If you require valves with integrated flanges (double flanged ends), this is a customizable option. Please specify the flange standard (e.g., JIS, ANSI, DIN) required. -
Q: What is your packaging for export to prevent damage during sea freight?
A: Valves are individually packed in wooden crates or strong plywood boxes with internal bracing and waterproof wrapping. All machined surfaces and stems are coated with anti-rust grease and protected. This ensures they arrive in perfect condition at global ports.
Backed by our ISO9001 certified quality management system, Shanghai Zhibang ensures every JIS F7481 Butterfly Valve meets stringent manufacturing and inspection criteria. With an annual export value reflecting our global reach across North America, Europe, Asia, and beyond, and efficient shipping from major ports like Shanghai and Guangzhou, we have established ourselves as a trusted supplier to shipyards and marine equipment distributors worldwide. Our commitment is to deliver valves that offer reliable performance, contributing to the safety and efficiency of your marine HVAC systems. For detailed quotations, technical drawings, or to discuss your specific project requirements, please contact our sales team today.
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