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Home > Industrial Equipment & Components > Valve > Ball Valve > Duplex Stainless Steel Marine Ball Valve for Desulfurization Towers DN50 PN4.0MPa
Duplex Stainless Steel Marine Ball Valve for Desulfurization Towers DN50 PN4.0MPa
Product Spotlights
Engineered for marine scrubbers, this DN50 PN4.0MPa ball valve uses duplex stainless steel for superior strength and corrosion resistance against seawater and acidic media. It ensures reliable, leak-tight performance under high pressure and harsh conditions, supporting emission compliance with low maintenance needs. Available with various actuation options for seamless system integration.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Material:
Other, Duplex Stainless Steel (e.g., S31803, S32205)
Application:
Other, Marine Desulfurization Towers (Scrubbers)
Valve Type:
Ball Valve
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Other, Duplex Stainless Steel (e.g., S31803, S32205)
Application
Other, Marine Desulfurization Towers (Scrubbers)
Valve Type
Ball Valve
Nominal Diameter (DN)
50
Pressure Rating (PN)
4.0 MPa
Connection Type
Flanged (Standard), optional
Operation
Manual Lever/Gear, Pneumatic, Electric Actuator
Seat & Seal Material
PTFE, RPTFE, Metal Seated options
Design Standard
API 608, API 6D, ISO 17292
Fire Safe Design
API 607/API 6FA compliant options
As a dedicated manufacturer with years of expertise in industrial valve solutions, Shanghai Zhibang Valve is proud to present our specialized Duplex Stainless Steel Marine Ball Valve, engineered specifically for the demanding environments of desulfurization towers (scrubbers) onboard vessels. This DN50 PN4.0MPa valve is a critical component designed to ensure reliable, leak-tight shut-off and control of aggressive process media, contributing directly to the efficiency and compliance of marine exhaust gas cleaning systems. We understand the challenges of corrosion, high pressure, and cyclic operation in marine applications, which is why this valve is built with superior materials and precision engineering to deliver long-term performance and reduce total cost of ownership for shipowners and system integrators.
Core Features & Technical Advantages:
- Superior Corrosion & Erosion Resistance: Constructed from duplex stainless steel (grades like UNS S31803/S32205), this valve offers an excellent balance of strength and resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC). This is crucial for handling seawater, acidic slurries, and other corrosive fluids present in desulfurization scrubber loops.
- High-Pressure Integrity: Rated for PN4.0MPa (Class 600 equivalent), the valve features a robust body design, high-integrity stem sealing system, and precision-machined ball and seats to maintain a bubble-tight seal even under fluctuating pressure conditions common in scrubber operations.
- Robust Design for Marine Service: The valve is designed to withstand vibration, thermal cycling, and the harsh marine atmosphere. Components are selected and treated to prevent galvanic corrosion, and the overall design minimizes potential failure points.
- Versatile Actuation & Control: Available in standard manual lever operation or can be configured with pneumatic or electric actuators for remote or automated control integration into the vessel's central monitoring system.
- Low Maintenance & High Reliability: The design emphasizes ease of maintenance. Features like a blow-out proof stem, adjustable stem seals, and self-lubricating seat materials reduce the need for frequent intervention and extend service intervals.
Detailed Technical Specifications:
| Parameter | Specification |
| Valve Type | Full Port / Standard Port Floating Ball Valve |
| Size (DN) | 50 (2") |
| Pressure Rating (PN) | 4.0 MPa |
| Body Material | Duplex Stainless Steel (S31803/S32205) |
| Ball Material | Duplex Stainless Steel, Chrome Plated or Weld Overlay options |
| Seat Material | Enhanced PTFE (RPTFE), PEEK, or Metal (for high-temp) |
| Stem Material | Duplex Stainless Steel with Blow-Out Proof Design |
| End Connection | RF Flanged (ASME B16.5, EN1092-1), BW optional |
| Temperature Range | -29°C to +200°C (varies with seat material) |
| Fire Safe Design | Optional, compliant with API 607/6FA |
| Test Standards | Shell Test: 1.5x PN, Seat Test: 1.1x PN per API 598 |
Benefits for Your Desulfurization System:
- Enhanced System Uptime: The exceptional corrosion resistance minimizes unplanned downtime due to valve failure, ensuring continuous scrubber operation for emission compliance.
- Reduced Lifecycle Costs: The durability of duplex steel and long-lasting sealing components lower replacement frequency and maintenance labor costs.
- Operational Safety: The high-pressure rating and reliable sealing provide a critical safety margin, containing process fluids effectively and protecting personnel and equipment.
- Regulatory Compliance Support: A reliable valve is key to maintaining consistent scrubber performance, helping vessel operators meet stringent IMO and regional emissions regulations (like SECA zones).
- Flexible Integration: Available in various configurations and actuator options, the valve can be tailored to fit specific piping layouts and control philosophies of different scrubber manufacturers.
Backed by our ISO9001:2015 certified quality management system, every Duplex Stainless Steel Marine Ball Valve undergoes rigorous material verification, dimensional inspection, and pressure testing before shipment. Since our establishment, we have built a strong reputation by supplying reliable industrial valves to a global clientele across North America, Europe, Southeast Asia, and other key maritime regions. Our annual export volume reflects the trust placed in our products by international partners. We offer flexible shipping from major ports like Shanghai and Guangzhou. For a robust, corrosion-resistant valve solution that stands up to the harsh realities of marine desulfurization, contact Shanghai Zhibang Valve today to discuss your project requirements, request a detailed quotation, or inquire about custom modifications to suit your specific application needs.
Frequently Asked Questions (FAQ):
-
Q: Why is duplex stainless steel specifically recommended for desulfurization tower valves?
A: Desulfurization scrubbers handle a mix of seawater, alkaline solutions, and acidic by-products (sulfuric acid mist). Duplex stainless steel offers a superior combination of high strength (twice that of standard 316 stainless) and excellent resistance to chloride-induced pitting and stress corrosion cracking, which are common failure modes in this environment. -
Q: Can this valve be used with both open-loop and closed-loop scrubber systems?
A: Yes. The corrosion-resistant properties of the duplex steel make it suitable for both types. For closed-loop systems using fresh water and additives, it provides long-term reliability. For open-loop systems using seawater directly, its pitting resistance is particularly advantageous. -
Q: What actuator options are available, and how do I choose?
A: We offer manual lever/handwheel, pneumatic (double-acting or spring-return), and electric motor actuators. The choice depends on your system's automation level, available power source (air or electricity), and fail-safe requirements (e.g., spring-return to close on air loss). -
Q: Is the valve suitable for abrasive slurries sometimes present in scrubber discharge?
A: While duplex steel is erosion-resistant, for highly abrasive slurry services, we can offer options with hardened ball surfaces (e.g., chrome plating or stellite overlay) and more abrasion-resistant seat materials like reinforced polymers or metal seats to extend service life. -
Q: What are the standard flanging dimensions and face finish?
A: The standard flanges conform to ASME B16.5 Class 150/PN20 or EN1092-1 PN40 RF series. The raised face (RF) finish is standard. Other standards like JIS or specific face-to-face dimensions per API 6D can be provided upon request. -
Q: Do you provide documentation like material test certificates (MTC) and inspection reports?
A> Yes. As standard, we provide a manufacturer's data sheet and a final inspection report. Full material traceability with Mill Test Certificates (MTCs) for the duplex steel castings/forgings is available upon request, which is often required for marine classification society approvals. -
Q: What is the typical lead time for an order of DN50 PN4.0MPa valves?
A> For standard configurations with manual operation, lead time is generally competitive. For orders with specific actuators, special coatings, or other customizations, the lead time will be confirmed based on the project requirements. We maintain efficient logistics from our Shanghai base. -
Q: How does the fire-safe option work, and when is it needed?
A> A fire-safe design incorporates secondary metal sealing surfaces (usually behind the primary polymer seats). In a fire event, if the primary seats are compromised, the metal-to-metal contact provides a secondary seal to prevent catastrophic leakage. It is recommended for applications where fire risk is a concern, often as per shipowner specifications or specific system safety analyses.
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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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