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Help CenterAPI 609 Large Diameter Butterfly Valve DN800-DN1200 Class150, Ductile Iron, Gear Operated, Used in Shipbuilding
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Shanghai Zhibang Valve Manufacture Co., Ltd, established in 2016, is a professional manufacturer specializing in high-quality industrial valves. Our API 609 Large Diameter Butterfly Valve DN800-DN1200 Class150 is engineered for demanding shipbuilding and marine applications. Made from premium ductile iron and equipped with a reliable gear operator, this valve ensures precise flow control even in large-diameter piping systems. With annual export value exceeding US$1 million and ISO9001 certification, we deliver consistent quality that meets international standards.
This butterfly valve features a compact design, lightweight construction, and excellent sealing performance. The gear-operated mechanism provides smooth torque transmission, reducing manual effort while enabling accurate throttling and isolation. Available in sizes from DN800 to DN1200 with Class150 pressure rating, it is ideal for seawater cooling systems, ballast water management, and fire-fighting networks in ships.
Key Features & Benefits
- Ductile Iron Body: Superior strength and corrosion resistance compared to cast iron, suitable for marine environments.
- API 609 Compliant Design: Ensures interchangeability and reliability per international butterfly valve standard.
- Gear Operator with Handwheel: Provides high torque output for large valves, requiring minimal operator effort.
- Bi-Directional Sealing: Bubble-tight shut-off for both directions, enhancing system safety.
- Optional Seat Materials: EPDM (water/oil) or PTFE (chemical resistant) to suit different media.
- Nylon/Epoxy Coated Disc: Prevents scaling and extends service life in saltwater applications.
- Short Face-to-Face Dimensions: Conforms to ISO 5752, saving installation space.
- Easy Maintenance: Replaceable seat and bushings allow field servicing without special tools.
Technical Specifications
| Parameter | Value |
|---|---|
| Size Range | DN800 – DN1200 (32″ – 48″) |
| Pressure Class | Class150 (PN10/PN16 flanges compatible) |
| Body Material | Ductile Iron (ASTM A536 60-40-18) |
| Disc Material | Ductile Iron + Nylon/Epoxy Coating |
| Stem Material | Stainless Steel 416 / 410 |
| Seat Material | EPDM (standard) / PTFE (optional) |
| Operation | Gear operated with lockable handwheel |
| Design Standard | API 609, ISO 5752, EN 593 |
| Flange Drilling | ASME B16.5 / EN 1092-2 |
| Temperature Range | -20°C to +120°C (EPDM) / -20°C to +180°C (PTFE) |
| Leakage Rate | ISO 5208 Rate A (bubble-tight) |
Applications in Shipbuilding
Our large-diameter butterfly valves are widely used in the following ship systems:
- Seawater cooling and fire-fighting mains
- Ballast water management systems
- Bilge and drainage lines
- Fuel oil transfer (with PTFE seat)
- HVAC and chilled water networks
- Sanitary and freshwater systems
Quality Assurance & Service
Shanghai Zhibang Valve Manufacture Co., Ltd operates under an ISO9001 quality management system. Each valve undergoes hydrostatic shell test, seat leakage test, and operational torque verification before shipment. Our production capacity and strict quality controls ensure consistent performance even for large orders.
With annual export value between US$1 million and US$1.5 million, we serve markets across North & South America, Europe, Asia, Africa, and Oceania. Shipment is available from Shanghai, Guangzhou, Hong Kong, or Beijing ports. We offer flexible customization options such as coatings, stem extensions, and lockable handles. Contact our team for detailed drawings, pricing, and lead times.
Frequently Asked Questions
Q: Can this valve be used for seawater applications?
A: Yes, the ductile iron body with epoxy coating and stainless steel stem make it highly resistant to seawater corrosion. EPDM seat is recommended for seawater service.
Q: What is the maximum operating pressure?
A: For Class150 valves, the maximum working pressure varies by temperature. At ambient temperature (38°C) it is 1.96 MPa (285 psi). Pressure-temperature charts are available upon request.
Q: Do you provide actuators for remote operation?
A: Yes, we can supply electric, pneumatic, or hydraulic actuators as optional add-ons. Gear operator is standard for manual override.
Q: What is the delivery time for DN1200 size?
A: Standard lead time is 30-45 working days for large diameters. Custom orders may require 50-60 days depending on quantity and coating requirements.
Q: Are the valves certified for marine classification?
A: Our valves can be designed and tested to meet DNV, GL, or ABS requirements upon request. Please specify classification society when ordering.
Q: Can the gearbox be replaced in the field?
A: Yes, the gearbox is mounted via standard bolt pattern and can be replaced without removing the valve from the pipeline. Detailed instructions are included.
Q: What flange standards are available?
A: Valves can be supplied with ASME B16.5 Class150 flanges or EN 1092-2 PN10/PN16 flanges. Other standards are available on request.
Q: How do I request a quotation?
A: Please provide size, quantity, seat material, and any required certifications. You can contact our sales team via email or phone for a prompt reply.
Choose Shanghai Zhibang Valve – a reliable partner for your shipbuilding projects. Request a quote today!
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