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Help CenterPN10/PN16 Marine Rubber Lined Butterfly Valve, Ductile Iron Body, 316 Stainless Steel Stem
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As a leading manufacturer with ISO 9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing robust and reliable fluid control solutions for demanding marine environments. Our PN10/PN16 Marine Rubber Lined Butterfly Valve is engineered to deliver exceptional performance, durability, and cost-effectiveness for shipbuilding, offshore platforms, and seawater treatment systems. With over eight years of industry experience and a strong export presence across global markets, we understand the critical need for valves that withstand corrosive conditions while ensuring leak-tight sealing. This valve represents our commitment to quality, offering a perfect balance of strength, corrosion resistance, and low maintenance for your critical piping applications.
Product Overview & Key Advantages
This marine-grade butterfly valve is designed specifically to handle seawater, ballast water, bilge systems, and other corrosive fluids. Its construction prioritizes longevity and reliability in harsh saltwater environments, reducing the total cost of ownership through extended service intervals and minimal downtime.
- Superior Corrosion Resistance: The combination of a ductile iron body with a high-quality rubber lining and a 316 stainless steel stem provides excellent protection against galvanic corrosion and pitting, which are common challenges in marine applications.
- Bubble-Tight Sealing: The resilient rubber liner ensures a bubble-tight seal against the disc, minimizing internal and external leakage even under varying pressure conditions, which is crucial for environmental protection and system efficiency.
- Robust & Durable Construction: Ductile iron offers higher tensile strength and impact resistance compared to standard cast iron, making the valve body suitable for the vibrations and mechanical stresses encountered onboard ships.
- Low Torque & Easy Operation: The design of the rubber-lined seat and the polished 316 SS stem ensures smooth, low-friction operation, whether manually operated with a lever or automated with a gearbox or actuator.
- Versatile Configurations: Available in wafer or lug body styles to suit different piping installation requirements. Various rubber compound options (e.g., EPDM, NBR) are available to match specific fluid media and temperature ranges.
- Easy Maintenance: The valve design often allows for inline maintenance or seat replacement without removing the entire valve from the pipeline, significantly reducing maintenance time and costs.
Technical Specifications & Detailed Data
The following table outlines key specifications for our standard PN10/PN16 Marine Rubber Lined Butterfly Valve. Custom specifications for higher pressures, special sizes, or exotic materials are available upon request.
| Parameter | Specification |
|---|---|
| Design Standard | API 609, ISO 5752 |
| Pressure Rating | PN10 (10 bar), PN16 (16 bar) |
| Temperature Range | -10°C to +120°C (depends on liner material) |
| Body Material | Ductile Iron (GGG40/50), Epoxy Coated |
| Disc Material | Ductile Iron, Epoxy Coated or 316 SS |
| Stem Material | AISI 316 Stainless Steel |
| Seat/Liner Material | Resilient Rubber (EPDM, NBR, others optional) |
| Operation | Manual Lever, Gear Operator, or Actuator |
| Connection | Wafer, Double Flange, Lug Type |
| Face-to-Face | Per ISO 5752 Series 14/20 |
Applications & Benefits for Your Business
This valve is an ideal choice for numerous marine and industrial applications where corrosion resistance and reliable shut-off are paramount. By choosing our product, you invest in system integrity and operational safety.
- For Shipbuilding & Repair Yards: Ensures compliance with marine standards, provides a long service life, and reduces the frequency of valve replacements during dry-docking, lowering overall project costs.
- For Offshore Oil & Gas Platforms: Handles seawater cooling systems, firefighting lines, and ballast water with reliability, contributing to the safety and uninterrupted operation of offshore assets.
- For Port Facilities & Desalination Plants: Manages intake and discharge lines effectively, resisting biofouling and corrosion from seawater, leading to reduced maintenance and higher plant availability.
- For System Integrators & Engineers: Offers a standardized, readily available component that simplifies design, ensures compatibility, and speeds up procurement for marine projects worldwide.
Shanghai Zhibang Valve backs its products with the credibility of an ISO 9001 certified manufacturing process, ensuring consistent quality control from raw material inspection to final testing. Our annual export value of US$1-1.5 million and presence in major markets from North America and Europe to Southeast Asia and Africa demonstrate our proven ability to meet international standards and client expectations. We ship efficiently from key ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery. Choose our PN10/PN16 Marine Rubber Lined Butterfly Valve for a solution that combines technical excellence with practical reliability, safeguarding your marine operations. Contact us today for a quotation or to discuss your specific project requirements.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of a rubber-lined butterfly valve for marine use?
A: The primary advantage is its exceptional corrosion resistance. The rubber lining completely isolates the metallic body and disc from the corrosive fluid (like seawater), while the 316 stainless steel stem provides additional protection. This combination drastically extends valve life in saltwater environments.
Q2: Can this valve be used for freshwater applications as well?
A: Absolutely. While it is optimized for marine conditions, its durable construction and tight sealing make it equally suitable for freshwater cooling systems, potable water lines, wastewater treatment, and various industrial processes.
Q3: What types of rubber lining are available, and how do I choose?
A: Common options include EPDM for hot water and steam (up to 120°C), and NBR for oils and fuels. We also offer other compounds like Viton for specific chemicals. The choice depends on the fluid media, temperature, and chemical compatibility requirements of your application.
Q4: Is the valve suitable for throttling or flow control?
A: While primarily designed for on/off service, this resilient-seated butterfly valve can be used for moderate throttling. For precise flow control, we recommend consulting with our engineers to select the appropriate disc profile and actuator configuration.
Q5: What actuation options are available?
A: The valve can be fitted with manual levers, gear operators for larger sizes requiring reduced operating torque, or automated actuators (electric, pneumatic, or hydraulic) for remote control and integration into SCADA systems.
Q6: Do you provide certifications or test reports with the valves?
A> Yes, as an ISO 9001 certified manufacturer, we can provide standard material certificates and factory test reports (e.g., shell test, seat leak test) upon request. Specific maritime certifications can be discussed based on project requirements.
Q7: What is the typical delivery lead time for standard sizes?
A: For standard sizes (DN50-DN600) and configurations, our lead time is generally competitive. We maintain strategic stock for common items. Exact timelines depend on order quantity and specific specifications; please inquire for a detailed schedule.
Q8: How does the lug-style valve differ from the wafer-style?
A> A wafer-style valve is installed between two pipe flanges using through-bolts. A lug-style valve has threaded inserts (lugs) on the body, allowing it to be bolted directly to each flange without through-bolts. Lug style is often preferred for end-of-line service or where one side of the pipeline may need to be disconnected independently.
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