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Help Center316 Stainless Steel Marine Ball Valve With Drain Valve, DN50 to DN200 Size Range
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As a professional manufacturer specializing in high-performance industrial valves, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our 316 Stainless Steel Marine Ball Valve with an integrated drain valve. Engineered for the demanding environments of marine and offshore applications, this valve combines superior corrosion resistance with practical functionality. Our commitment to ISO9001 certified manufacturing processes ensures every valve delivers reliable performance and long-term durability for your critical fluid control systems.
The core value of this product lies in its dual-purpose design. The integrated drain valve provides a convenient and safe method for system drainage, pressure relief, or sampling without requiring additional piping or separate valves. This simplifies installation, reduces potential leak points, and enhances overall system safety and maintenance efficiency. For shipbuilders, offshore platform operators, and marine engineers, this valve offers a robust solution that stands up to saltwater, harsh weather, and corrosive cargoes.
Key Features & Technical Advantages:
- Superior Corrosion Resistance: Constructed from 316 stainless steel, offering excellent resistance to pitting and crevice corrosion in chloride-containing environments, far surpassing 304 stainless steel.
- Integrated Drain Design: The built-in drain valve (typically a small ball or needle valve) allows for controlled draining, venting, or pressure equalization, eliminating the need for a separate drain port assembly.
- Full Port Design (Standard): Provides minimal pressure drop and allows for easy passage of pigging devices or inspection tools, which is crucial for marine pipeline maintenance.
- Robust Construction: Features a one-piece or two-piece body design (depending on size) for enhanced strength. The stem is designed with an anti-blowout feature for safety.
- Versatile Sealing Options: Standard seat material is PTFE for tight shut-off and good chemical resistance. Reinforced PTFE or other specialized seat materials are available upon request for specific media or temperature ranges.
- Multiple Actuation Options: Standard lever handle for quick operation. Optional gearbox operators are available for larger sizes (DN150, DN200) or for applications requiring higher torque.
- Fire-Safe Design Available: Can be manufactured to meet common fire-safe standards (e.g., API 607, API 6FA) upon request, providing an extra layer of safety for hazardous areas.
Detailed Specifications & Configurations:
| Parameter | Specification / Option |
|---|---|
| Size Range | DN50 (2"), DN65 (2.5"), DN80 (3"), DN100 (4"), DN125 (5"), DN150 (6"), DN200 (8") |
| Pressure Rating | Standard: PN16 (232 psi). PN25 (363 psi) and other classes are customizable. |
| Connection Standards | Flanged: ANSI B16.5, DIN, JIS, GB standards. Threaded: NPT, BSPT, BSPP. |
| Temperature Range | Standard: -20°C to 150°C (-4°F to 302°F) with PTFE seats. Extended ranges available. |
| Drain Valve Size | Typically 1/2" NPT or 3/4" NPT, integrated into the ball valve body. |
| Body & Trim Material | Body/Ball/Stem: AISI 316 SS. Seats: PTFE. Seals: PTFE/Viton® (optional). |
Benefits for Your Operations:
- Reduced Installation Cost & Space: Combining two valve functions into one unit saves on piping materials, labor, and valuable space in tight engine rooms or offshore modules.
- Enhanced Safety & Maintenance: The drain valve allows for safe depressurization before maintenance and efficient fluid removal, reducing spill risks and worker exposure.
- Long Service Life & Low TCO: The 316 stainless steel construction ensures exceptional longevity even in aggressive marine environments, lowering total cost of ownership through reduced replacement frequency.
- Global Compliance & Compatibility: Manufactured to international dimensional standards, ensuring easy integration into both new builds and retrofit projects worldwide.
- Reliable Performance: The quarter-turn operation ensures quick, positive shut-off, which is critical for emergency isolation scenarios on vessels and platforms.
Frequently Asked Questions (FAQ):
Q1: What is the main advantage of 316 stainless steel over 304 for marine use?
A1: 316 stainless steel contains molybdenum, which significantly increases its resistance to corrosion from chlorides (like seawater) and many industrial chemicals. This makes it the preferred material for marine and coastal applications where salt spray and moisture are constant factors.
Q2: Can the drain valve be used for pressure relief?
A2: The primary function of the integrated drain valve is for drainage and venting. While it can be used for minor pressure equalization, it is not designed as a primary pressure relief device. For critical pressure relief applications, a dedicated Pressure Relief Valve (PRV) should be installed in the system.
Q3: Are these valves suitable for fuel oil or chemical cargo lines on ships?
A3: Yes, the 316 SS material and PTFE seats offer good compatibility with a wide range of media, including various fuel oils, lube oils, seawater, ballast water, and many mild chemicals. For specific aggressive chemicals, we recommend consulting our technical team for seat material selection.
Q4: What types of end connections are available?
A4: We primarily offer flanged connections (ANSI, DIN, JIS, GB) which are standard for marine piping in sizes DN50 and above. Threaded ends (NPT, BSP) are available as a special option, particularly for smaller sizes or specific system requirements.
Q5: Do you offer fire-safe versions of this valve?
A5: Yes, we can manufacture this ball valve with a fire-safe design upon request. This includes features like secondary metal-seated sealing in case the primary soft seats are damaged by fire, typically complying with standards like API 607 or API 6FA.
Q6: What is the lead time for an order of DN150 valves?
A6: Standard configurations are often available from stock or have shorter lead times. For customized orders (specific standards, actuation), typical production lead time is 4-6 weeks. We provide accurate lead time quotes with every formal quotation.
Q7: Can the valve be equipped with pneumatic or electric actuators?
A7: Absolutely. While supplied with a manual lever or gear operator as standard, the valve is designed to be compatible with a wide range of pneumatic (double-acting or spring-return) and electric actuators. We can supply the complete actuated package.
Q8: What documentation is provided with the valves?
A8: Each shipment is accompanied by a Material Test Certificate (MTC) for the 316 stainless steel, a detailed dimensional drawing, a manual, and a packing list. Additional certifications, such as a 3.1 Material Certificate, can be provided upon request.
Backed by our ISO9001 certified quality management system and nearly a decade of manufacturing expertise since 2016, Shanghai Zhibang delivers valves that meet the stringent demands of global marine markets. Our products have been successfully exported to North America, Europe, Southeast Asia, and other key regions, with an annual export value demonstrating our capacity and reliability. We support flexible shipping from major ports like Shanghai, Guangzhou, and Hong Kong to ensure timely delivery. Choose our 316 Stainless Steel Marine Ball Valve with Drain Valve for a combination of durability, functionality, and value that protects your assets and streamlines your operations. Contact us today for a detailed quotation or to discuss your specific project requirements.
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