Contact Platform Support
Help Center
Home > Industrial Equipment & Components > Valve > Butterfly Valve > Marine Grade Duplex Stainless Steel Ball Valve CB/T3191, Fire-Safe Design API 607
Marine Grade Duplex Stainless Steel Ball Valve CB/T3191, Fire-Safe Design API 607
Product Spotlights
Engineered for extreme environments, this Marine Grade Duplex Stainless Steel Ball Valve combines superior chloride corrosion resistance with API 607 certified fire-safe protection. It offers high strength for reduced weight, reliable shut-off, and a long service life, making it an ideal, cost-effective choice for offshore, marine, and harsh chemical processing applications where safety and durability are paramount.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Standard:
CB/T3191, API 607 Fire-Safe Design
Application:
Other, Marine
Material:
Marine Grade Duplex Stainless Steel (2205)
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
Related Products
-
CB/T3191 Marine Fuel Oil Ball Valve With Mill Test Report, Pressure Tested, 12-Month WarrantyNegotiableMOQ: 1 Unit -
CB/T3191 Duplex Stainless Steel Ball Valve With PTFE Seats, Full Port Design DN50 PN16NegotiableMOQ: 1 Unit
-
CB/T3191 Duplex Stainless Steel Ball Valve for Chemical Tanker Cargo Line ApplicationsNegotiableMOQ: 1 Unit
-
Marine Fuel Oil Service Ball Valve, CB/T3191 Design With Locking Device, Suitable for Viscous OilNegotiableMOQ: 1 Unit
-
CB/T3191 Duplex Stainless Steel Ball Valve, Factory Direct With Technical Support AvailableNegotiableMOQ: 1 Unit
Standard
CB/T3191, API 607 Fire-Safe Design
Application
Other, Marine
Material
Marine Grade Duplex Stainless Steel (2205)
Valve Type
Ball Valve
Connection Type
Flanged (Standard), Optional Threaded/Socket Weld
Pressure Rating
PN16 to PN40 (Customizable)
Temperature Range
-29°C to +200°C (Standard), Higher available
Operation
Manual Lever, Gearbox, Pneumatic/Hydraulic Actuator Optional
Seat Material
Enhanced PTFE, Metal Seated Optional
As a leading manufacturer with a strong foundation since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in delivering high-performance industrial valves for demanding global markets. Our Marine Grade Duplex Stainless Steel Ball Valve, designed in strict compliance with CB/T3191 and featuring an API 607 certified fire-safe design, represents our commitment to engineering excellence. Engineered for the harshest environments, from offshore platforms to chemical tankers, this valve offers an exceptional combination of corrosion resistance, structural integrity, and failsafe operation under extreme conditions, providing our clients with a reliable and long-lasting solution for critical flow control applications.
Core Product Features & Technical Advantages:
- Superior Material Construction: Manufactured from UNS S31803/S32205 Duplex Stainless Steel, this valve offers approximately twice the yield strength of standard 316 stainless steel, along with excellent resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC) in chloride-rich environments typical of marine and offshore applications.
- API 607 Certified Fire-Safe Design: In the event of a fire, the valve's unique design ensures secondary metal-to-metal sealing, preventing catastrophic leakage. The seats and seals are engineered to maintain isolation integrity even after exposure to high temperatures, a critical safety feature for oil & gas and chemical processing plants.
- Robust & Low Maintenance Operation: The full-port or reduced-port design ensures minimal pressure drop. The blow-out-proof stem and anti-static device are standard, enhancing safety. The low-friction, self-lubricating seat materials contribute to easy, smooth operation and extended service intervals.
- Versatile Configuration Options: Available in a wide range of sizes, pressure classes, and end connections to suit specific pipeline requirements. Actuation options include manual lever, gear operator, or automated pneumatic/electric/hydraulic actuators for integration into control systems.
Detailed Technical Specifications:
| Parameter | Specification |
| Design & Manufacturing Standard | CB/T3191, API 607 (Fire Test) |
| Body & Trim Material | Duplex Stainless Steel 2205 (UNS S31803/S32205) |
| Seat & Seal Material (Standard) | Reinforced PTFE (RPTFE) / PEEK |
| Pressure Rating (PN) | PN16, PN25, PN40 (Other classes available upon request) |
| Temperature Range (Standard Seat) | -29°C to +200°C |
| End Connection | Flanged (RF, RTJ), Threaded (NPT, BSPT/BSPP), Socket Weld |
| Operation | Manual Lever (Standard), Gearbox, Pneumatic/Hydraulic/Electric Actuator |
| Fire-Safe Certification | API 607 6th Edition / ISO 10497 |
Benefits for Your Operations:
- Enhanced Safety & Compliance: The API 607 fire-safe certification helps your facility meet stringent international safety regulations, reducing risk and potential liability.
- Reduced Lifecycle Cost: The exceptional corrosion resistance and strength of duplex steel significantly extend valve service life, minimizing replacement frequency and total cost of ownership, even in aggressive media like seawater, acids, and chlorides.
- Reliable Performance: Ensures dependable shut-off and control in critical applications, preventing unplanned downtime in sectors like shipping, petrochemicals, and power generation.
- Global Supply Chain Support: With annual export values between US$1-1.5 million and shipments from major ports like Shanghai, Guangzhou, and Hong Kong, we provide reliable logistics to key markets across North America, Europe, Southeast Asia, the Middle East, and beyond.
Frequently Asked Questions (FAQ):
-
Q: What is the main advantage of using Duplex Stainless Steel over 316L for marine valves?
A: Duplex Stainless Steel (2205) offers a superior combination of higher strength and better chloride stress corrosion cracking resistance compared to 316L. This translates to a lighter, thinner valve design with the same pressure rating and significantly longer service life in seawater and offshore environments. -
Q: Does the "Fire-Safe" design mean the valve is completely leak-proof during a fire?
A: Per API 607 standards, a fire-safe valve is designed to provide a secondary metal seal after the primary soft seal (like PTFE) is compromised by fire. It significantly reduces leakage to a defined, acceptable rate, preventing a major blowout and containing the hazard, but is not necessarily "zero leakage" under extreme prolonged fire exposure. -
Q: Can this valve be used for cryogenic services?
A: The standard temperature range is -29°C to +200°C. For lower cryogenic temperatures (e.g., -196°C for LNG), specific design modifications, material grade changes (e.g., to 304L or 316L for low-temperature toughness), and extended stem options would be required. Please inquire for customized cryogenic solutions. -
Q: Are actuators available directly from your factory?
A: Yes. We offer a range of pneumatic (double-acting or spring-return), electric, and hydraulic actuators from reputable brands or our own assembly. We can pre-assemble, test, and ship the valve as a complete actuated package. -
Q: What documentation do you provide with the valves?
A> Standard documentation includes a Material Test Certificate (MTC/3.1), hydrostatic test report, and a manual. API 607 fire test certificates, full IBR/IBP documentation, or NACE MR0175 compliance certificates are available upon request. -
Q: What is your production lead time for a standard order?
A: Lead times vary based on size, pressure rating, and quantity. For standard DN50-DN300 flanged valves in PN40, typical lead time is 4-6 weeks. We maintain some stock for common items, and expedited production is negotiable. -
Q: Do you offer valves with other standards like API 6D or BS?
A: Absolutely. While this model is built to CB/T3191 (a common Chinese marine standard aligned with international norms), we can manufacture valves to API 6D, ASME B16.34, BS, DIN, and other international standards based on your project specifications. -
Q: How do you ensure quality control?
A> Our manufacturing process is governed by an ISO9001 certified quality management system. Every valve undergoes rigorous in-process inspections and final testing, including shell test, seat test (with air or water), and fire-safe testing on sampled lots to ensure compliance.
Backed by our ISO9001 certified manufacturing system and nearly a decade of industry experience since 2016, Shanghai Zhibang delivers not just a product, but a promise of reliability. Our valves are trusted by clients across six continents, from Eastern Europe to Oceania, a testament to their performance in diverse and challenging conditions. Choosing our Marine Grade Duplex Stainless Steel Ball Valve means investing in a solution that prioritizes safety, durability, and operational efficiency. We invite you to contact us with your specific application details to receive a tailored quotation and technical support. Let us be your partner in securing your critical flow control systems.
Send Inquiry to This Supplier
* Email
Want the best price?
Post an RFQ now!
1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
You May Also Like
-
Duplex Stainless Steel Ball Valve CB/T3191 With Mill Test Report and 2-Year WarrantyNegotiableMOQ: 1 Unit
-
CB/T3191 Approved Duplex Steel Ball Valve for High Pressure Saltwater Service, 6.4MPa RatingNegotiableMOQ: 1 Unit
-
CB/T3191 Low Temperature Marine Ball Valve With Stainless Steel Body for LNG Systems (-196°C, DN15-DN80, PN1.6-4.0MPa)NegotiableMOQ: 1 Unit
-
Stainless Steel Low Temperature Ball Valve per CB/T3191, Extended Bonnet for Cold InsulationNegotiableMOQ: 1 Unit
-
CB/T3191 Low Temperature Marine Ball Valve With Mill Test Report and 2-Year WarrantyNegotiableMOQ: 1 Unit
-
Low Temperature Ball Valve CB/T3191, Stainless Steel, Full Port Design, DN15 to DN80 Size RangeNegotiableMOQ: 1 Unit
-
DNV Certified CB/T3191 Marine Ball Valve for Cryogenic Service (-196°C, Threaded Connection, PN4.0MPa)NegotiableMOQ: 1 Unit
-
Marine Cryogenic Ball Valve CB/T3191 for Offshore Platform LNG Piping and StorageNegotiableMOQ: 1 Unit
-
CB/T3191 Low Temperature Ball Valve for Shipboard LNG Fuel Lines and Transfer SystemsNegotiableMOQ: 1 Unit
-
DN15-DN100 High Temperature Ball Valve, CB/T3191 Marine Standard, PN6.4MPa Pressure RatingNegotiableMOQ: 1 Unit
