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Marine Butterfly Valve for Engine Room Seawater Intake, API 609 Design
Product Spotlights
Engineered for engine room seawater intake systems, this API 609 double offset butterfly valve offers corrosion-resistant materials (SS316L/bronze), bubble-tight sealing, low torque operation, and compatibility with various actuators. Suitable for DN50–DN600, pressure Class 150/PN16. Backed by ISO9001 certified manufacturer with global export experience.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Application:
Other, Seawater intake
Material:
Ductile Iron, Bronze, Stainless Steel (optional)
Size Range:
DN50 - DN600 (2“ - 24“)
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Seawater intake
Material
Ductile Iron, Bronze, Stainless Steel (optional)
Size Range
DN50 - DN600 (2“ - 24“)
Pressure Rating
PN10/16, Class150 (customizable)
Connection Type
Wafer, Lug, Flanged
Design Standard
API 609
Seat Type
Resilient Seated (EPDM/NBR) or Metal Seated
Operating Temperature
-10°C to +120°C (depends on seat material)
Actuator Type
Manual, Electric, Pneumatic (available upon request)
Color
Blue, RAL 5015 (customizable)
Shanghai Zhibang Valve Manufacture Co., Ltd., a trusted manufacturer since 2016, specializes in producing high-performance valves for marine and industrial applications. Our Marine Butterfly Valve for Engine Room Seawater Intake, API 609 Design is engineered to withstand the harsh conditions of seawater systems while delivering precise flow control. With ISO9001 certification and annual export value exceeding US$1 million, we ensure every valve meets rigorous quality standards for global markets including North America, Europe, and Southeast Asia.
Key Product Features & Technical Specifications
- Corrosion-Resistant Materials: Body and disc available in ductile iron coated with epoxy, bronze, or stainless steel (316L) to resist seawater corrosion. Optional cathodic protection for extended lifespan.
- API 609 Design Compliance: Developed in accordance with API 609, ensuring reliable sealing, low torque operation, and compatibility with marine piping systems.
- Double Eccentric (Double Offset) Design: Minimizes seat wear during opening/closing, reduces operating torque, and provides bubble-tight shut-off even at low pressure differentials.
- Bidirectional Sealing: Resilient seat (EPDM, NBR) or metal seat options deliver zero leakage for seawater intake applications.
- Easy Installation & Maintenance: Wafer and lug styles allow direct mounting between flanges. Replaceable seat without special tools reduces downtime.
- Actuator Flexibility: Standard manual gearbox; compatible with electric, pneumatic, or hydraulic actuators upon request for remote control.
- Pressure & Temperature Range: Suitable for pressures up to Class 150 and temperatures from -10°C to +120°C (seat dependent), ideal for engine room cooling circuits.
| Parameter | Value / Options |
|---|---|
| Size Range | DN50 – DN600 (2" – 24") |
| Pressure Rating | PN10/16, Class 150 (other available) |
| Face-to-Face Dimension | API 609 Table 1 (short/medium pattern) |
| Leakage Rate | Bubble-tight (Class VI per API 598) |
| Seat Material | EPDM, NBR, PTFE, or Metal (custon) |
| Body Material | Ductile Iron + Epoxy, Bronze, SS316L |
| Operating Torque | Low due to double offset design |
| Certifications | ISO9001, API 609 compliant |
Benefits for Your Marine System
- Extended Service Life: Robust construction and marine-grade coatings reduce corrosion, minimizing maintenance cycles.
- Energy Efficient Operation: Lower torque requirement reduces actuator size and power consumption.
- Safe & Reliable Shut-Off: API 609 design ensures tight sealing even in seawater with sand or debris.
- Compliance with Marine Regulations: Meets common class society requirements such as DNV, ABS, CCS (certification available upon request).
- Global Delivery Support: Shipped from Shanghai, Guangzhou, Hong Kong, or Beijing ports with professional packaging for sea-freight.
Why Choose Shanghai Zhibang Valve?
As a specialized manufacturer with 8+ years of experience in valve production and a dedicated R&D team, we have supplied reliable solutions for marine clients across North America, South America, Europe, the Middle East, and Southeast Asia. Our export value of US$1–1.5 million annually reflects strong global recognition. Every Marine Butterfly Valve undergoes hydrostatic and leakage testing per API 598 before shipment. We also offer customization for different flange standards (ASME, EN, JIS) and actuator interfaces. Partner with us for high-quality, cost-effective valves backed by responsive technical support and fast delivery.
Frequently Asked Questions
-
Q: What materials are recommended for seawater intake butterfly valves?
A: For seawater applications, we recommend stainless steel 316L disc and shaft with ductile iron body coated with high-build epoxy. Bronze body and disc are also suitable for smaller sizes. All materials are corrosion-resistant and selected for long-term immersion in saltwater. -
Q: Is this valve designed for bi-directional shut-off?
A: Yes, the double offset design with resilient seat provides bi-directional bubble-tight sealing. For metal-seated options, the valve can also achieve bi-directional sealing with reduced leakage rates as per API 598. -
Q: Does your valve come with class society certificates like DNV or ABS?
A: Our valves are designed to meet common class rules. We can provide DNV, ABS, LR, or CCS certificates upon request during order. Standard valves are ISO9001 certified and API 609 compliant. -
Q: What is the typical lead time for these butterfly valves?
A: For standard sizes (DN50-DN300) and manual gearbox actuators, lead time is usually 15–25 working days. Larger sizes or actuated valves may take 30–40 days. We can expedite for urgent orders. -
Q: Can you supply custom flange drilling (ASME B16.5 or EN 1092-1)?
A: Yes, we offer flange drilling according to ASME B16.5 (Class 150/300), EN 1092-1 (PN10/16), JIS, and other standards. Please specify your requirements when ordering. -
Q: How does the actuator mounting interface work?
A: Our valves have a standard top flange per ISO 5211, allowing direct mounting of electric, pneumatic, or hydraulic actuators. We can also supply complete actuator-valve assemblies pre-tested. -
Q: What maintenance is needed for seawater butterfly valves?
A: Periodic inspection of seat seal and shaft seals is recommended. The resilient seat is replaceable without removing the valve from the pipeline. Lubrication of the gearbox (if manual) is required every 6–12 months. -
Q: What warranty do you offer?
A: We provide a standard 12-month warranty from the date of shipment for manufacturing defects. Extended warranty options are available upon negotiation.
Contact us today for a quotation or technical data sheet. Our team is ready to support your marine valve needs with prompt service and competitive pricing.
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1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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