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Help CenterPN16 Class 150 Wafer Type Dual Plate Check Valve in Cast Steel for Marine Pipeline Systems
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As a dedicated manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our high-performance PN16 Class 150 Wafer Type Dual Plate Check Valve. Engineered specifically for the demanding environments of marine pipeline systems, this valve is designed to provide reliable, automatic backflow prevention, protecting critical shipboard equipment and ensuring operational safety. Our commitment to quality, backed by ISO9001 certification, ensures that every valve delivers the durability and performance required for maritime applications, from ballast and bilge systems to fuel and cooling lines.
This valve combines robust construction with a space-saving wafer design, making it an ideal choice for shipbuilders, marine engineers, and offshore operators worldwide. With an annual export value reflecting our global reach across markets from North America and Europe to Southeast Asia and Africa, we understand the stringent requirements of marine applications. Our valves are built to withstand corrosive seawater, constant vibration, and high-pressure fluctuations, offering a dependable solution that minimizes maintenance and maximizes system uptime.
Core Features & Technical Advantages:
- Superior Backflow Prevention: The dual plate (twin disc) design ensures quick, positive sealing upon flow reversal, preventing water hammer and protecting pumps and compressors.
- Robust Marine-Grade Construction: Manufactured from cast steel (common grades: WCB, LCC), the valve body offers excellent strength and corrosion resistance suitable for seawater and marine atmospheres.
- Compact & Lightweight Wafer Design: The wafer-style valve installs directly between pipeline flanges, significantly saving space and weight compared to lug or flanged body check valves—a critical factor in ship design.
- Low Pressure Drop & High Flow Efficiency: The streamlined dual plates open fully with forward flow, presenting minimal flow obstruction, which helps reduce pumping energy costs.
- Reliable Sealing: Features a metal-to-metal seat or optional resilient seat (upon request) for tight shut-off, even with suspended solids sometimes present in marine systems.
- Versatile Installation: Can be installed in both horizontal and vertical pipelines (flow direction upward), providing flexibility in complex marine piping layouts.
- Minimal Maintenance: Simple design with few moving parts reduces the need for frequent servicing, a vital benefit in hard-to-access shipboard locations.
Detailed Technical Specifications:
| Parameter | Specification |
| Design Standard | API 594, API 6D, ANSI/ASME B16.34 |
| Pressure Rating | PN16 (16 bar) / ANSI Class 150 (285 psi) |
| Temperature Range | Standard: -29°C to 425°C (-20°F to 800°F) depending on seat material |
| Face-to-Face Dimension | Complies with API 594 short pattern or standard dimensions |
| Flange End Standard | ANSI B16.5, RF (Raised Face) or FF (Flat Face) available |
| Disc & Seat Options | Standard: SS304/SS316 discs with metal seat. Optional: NBR, EPDM, or Viton seals. |
Benefits for Your Marine Operations:
- Enhanced System Safety: Prevents reverse flow that could damage pumps, cause spillage, or disrupt ballast stability.
- Reduced Lifetime Cost: Durable construction and low maintenance lead to lower total cost of ownership.
- Improved Space Utilization: The wafer design allows for more compact piping arrangements, freeing up valuable space onboard.
- Global Compliance: Manufactured to widely recognized international standards, facilitating approval for use in vessels sailing worldwide.
- Reliable Performance: Consistent operation under the pitch and roll of a vessel, as well as in varying temperature conditions.
Shanghai Zhibang's expertise as a manufacturer, supported by our ISO9001 quality management system, ensures that every Class 150 Dual Plate Check Valve meets rigorous production standards. Our valves are trusted by partners across major global markets, from Eastern and Western Europe to the Americas, Asia, Africa, and Oceania, with shipments efficiently handled through key ports like Shanghai, Guangzhou, Hong Kong, and Beijing. This proven track record in export, coupled with our focus on marine applications, means you are sourcing from a supplier who understands the critical nature of your projects.
Choosing our valve means investing in a component that safeguards your marine pipeline integrity, reduces operational risks, and contributes to the overall efficiency of your vessel. We invite shipyards, marine equipment distributors, and engineering procurement teams to contact us for detailed quotations, technical data sheets, or to discuss custom requirements. Let us provide you with a reliable flow control solution that stands up to the challenge of the sea.
Frequently Asked Questions (FAQ)
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Q: What is the main advantage of a dual plate design over a single disc swing check valve for marine use?
A: The dual plate (twin disc) design offers faster closing action, which is crucial to prevent water hammer—a pressure surge that can damage pipes and fittings. It's also more compact and lighter, which is advantageous for weight-sensitive marine applications. -
Q: Can this wafer check valve be installed in vertical pipelines?
A: Yes, it can be installed in vertical lines provided the flow direction is upward. For downward flow in vertical lines, specific design considerations or an alternative valve type might be needed. -
Q: What cast steel materials are typically used, and how do they resist marine corrosion?
A> Common materials are WCB (carbon steel) or LCC (low-temperature carbon steel). For enhanced corrosion resistance in seawater, the valve internal components (discs, seat) are often made of stainless steel (304/316). External coatings or paints per marine specifications can also be applied. -
Q: Is this valve suitable for seawater ballast systems?
A: Absolutely. Its corrosion-resistant material options and robust design make it well-suited for ballast, bilge, cooling water, and other seawater handling systems onboard ships. -
Q: Are spare parts like seals or discs available for long-term maintenance?
A: Yes, as a manufacturer, we provide ready availability of critical spare parts. This ensures the long-term serviceability of the valve throughout the vessel's lifecycle. -
Q: What documentation is provided with the valve?
A> Standard documentation includes a material test certificate, dimensional drawing, and a manual. Certifications like ISO9001 are applicable to our manufacturing process. Specific marine society approvals (e.g., ABS, DNV, LR) can be discussed as a custom requirement. -
Q: What is the lead time for an order?
A: Lead times vary based on order quantity and specification. We maintain some standard sizes in stock, and production schedules can be provided upon request. -
Q: Do you offer valves with different pressure ratings (e.g., Class 300)?
A: Yes. While this product focuses on PN16/Class 150, we manufacture a full range of check valves in higher pressure classes (like Class 300, 600) and other materials (duplex stainless steel, etc.) suitable for more demanding services.
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