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Help CenterDIN 3357 Cast Steel Marine Flanged Ball Valve DN50-DN300 PN16-PN64
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As a leading manufacturer with over 8 years of expertise in industrial valve production, Shanghai Zhibang Valve is proud to present our premium range of DIN 3357 Cast Steel Marine Flanged Ball Valves. Engineered for demanding marine and offshore applications, these valves are the cornerstone of reliable fluid control systems on ships, FPSOs, and coastal infrastructure. Our commitment to ISO9001 quality management ensures that every valve, from DN50 to DN300, is built to withstand the harsh, corrosive marine environment while providing exceptional sealing performance and long service life. We understand that in the maritime industry, failure is not an option, which is why we focus on robust construction, precise engineering, and rigorous testing to deliver a product you can trust for critical applications.
Our marine-grade ball valves are designed with the specific challenges of sea water, fuels, lubricants, and other shipboard fluids in mind. The following features highlight their technical superiority and operational benefits:
- Superior Corrosion Resistance: The cast steel body, compliant with standards like A216 WCB, is often supplemented with specialized coatings or alternative materials (LCB, LCC for low temperatures) to combat saltwater corrosion, a primary cause of valve failure at sea.
- Robust, Fire-Safe Design: An optional, critical feature for safety-sensitive areas. In the event of a fire, the metal-seated design maintains a seal, preventing catastrophic fluid release. This design can be certified to relevant fire test standards upon request.
- Bubble-Tight Sealing: Utilizing advanced seat materials like PTFE or reinforced polymers, the valve ensures zero leakage across its full pressure range (PN16 to PN64), essential for environmental protection and system efficiency.
- Low Torque & Easy Operation: The polished ball and low-friction seats require minimal operating torque. This allows for smooth manual operation with a lever or, for larger sizes (typically DN150+), efficient actuation via gearboxes or pneumatic/hydraulic actuators, reducing crew effort and maintenance.
- Full Port or Reduced Port: Available in configurations to suit your flow requirements. Full port (full bore) valves minimize pressure drop for pumping efficiency, while standard port valves offer a cost-effective solution where flow restriction is not a primary concern.
- Extended Stem Design: Specifically beneficial for insulated pipelines, the extended stem ensures the operating mechanism remains accessible and functional even when the valve body is covered with insulation material.
The technical specifications of our DIN 3357 Marine Ball Valves are detailed below. Please note that specific material grades, trim options, and actuator types are customizable to meet your project's exact specifications.
| Parameter | Specification |
|---|---|
| Design & Manufacturing Standard | DIN 3357, DIN EN 1092-1 (Flanges) |
| Size Range (DN) | 50, 65, 80, 100, 125, 150, 200, 250, 300 |
| Pressure Rating (PN) | 16, 25, 40, 64 (Corresponding to Class 150, 300) |
| Body Material (Standard) | Cast Steel A216 WCB |
| Ball & Stem Material | Stainless Steel (AISI 304/316) or Chrome Plated Carbon Steel |
| Seat & Seal Material | PTFE, RPTFE, PEEK, or Metal (for fire-safe) |
| Test Standards | Shell Test: 1.5 x PN; Seat Test: 1.1 x PN |
Choosing our valve translates into direct benefits for your operation: reduced downtime due to reliable performance, lower lifecycle costs through durability, enhanced safety with fire-safe options, and global compliance for vessel construction and repair. Our valves are engineered to integrate seamlessly into both newbuilds and retrofit projects.
Backed by our ISO9001 certification and a track record of supplying to diverse markets across North America, Europe, Southeast Asia, and beyond, Shanghai Zhibang Valve stands as a reliable partner. With an annual export value demonstrating our global reach and stability, we ensure consistent quality and reliable supply from our strategic ports in Shanghai, Guangzhou, and Hong Kong. We invite you to experience the difference that professional manufacturing and a customer-centric approach can make. Contact us today to discuss your specific requirements for DN50-DN300 PN16-PN64 marine ball valves, request detailed technical drawings, or obtain a competitive quotation tailored to your project's scope and schedule.
Frequently Asked Questions (FAQ)
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Q: Is this valve suitable for seawater cooling systems?
A: Absolutely. The standard cast steel construction with appropriate coatings, and the option for stainless steel trim (AISI 316), makes it highly suitable for handling seawater, provided the specific material combination is selected for your service conditions. -
Q: What is the lead time for an order of DN200, PN40 valves?
A: Lead times vary based on order quantity and configuration. For standard specifications, we typically maintain stock or can produce within 4-6 weeks. We provide a confirmed schedule upon order placement. -
Q: Can you supply the valves with actuators?
A: Yes. We offer comprehensive packages including pneumatic (double-acting or spring-return), hydraulic, or electric actuators from reputable brands. The valve can be pre-assembled, tested, and shipped as a ready-to-install unit. -
Q: How does the "fire-safe" option work?
A: In a fire-safe design, the primary soft seats (e.g., PTFE) are backed by secondary metal seats. If the fire destroys the soft seals, the metal-to-metal contact between the ball and the body/seat ring maintains a seal to prevent major leakage, a critical safety feature. -
Q: Are your flanges compatible with ANSI/ASME standards?
A: While the valve is designed to DIN 3357, the flange dimensions per DIN EN 1092-1 are generally compatible with ANSI Class 150 and 300 flanges in terms of bore and bolt circle for many sizes. It's crucial to confirm dimensional compatibility for your specific piping system. -
Q: What documentation do you provide with the valves?
A: We provide a comprehensive documentation package including Material Test Certificates (3.1 or 3.2 as requested), pressure test reports, dimensional drawings, and a manual. Certificates of Conformity and origin are also supplied for export. -
Q: Do you offer different trims for different media?
A: Certainly. The "trim" (ball, stem, seats) can be customized. For seawater, we recommend 316 stainless steel ball/stem with PTFE seats. For fuels or oils, different seat materials like PEEK may be suggested. We advise based on your media, temperature, and pressure. -
Q: What is your warranty policy?
A: We offer a standard warranty against defects in materials and workmanship for a defined period from shipment, provided the valve is installed, operated, and maintained as per our instructions. Specific warranty terms are detailed in our commercial contract.
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