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Help CenterDIN 3357 Duplex Stainless Steel Ball Valve, DN15-DN200, PN16-PN40, Flanged End
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As a leading manufacturer with a strong commitment to quality and reliability, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our premium DIN 3357 Duplex Stainless Steel Ball Valve. Engineered for demanding industrial applications, this valve series combines the superior corrosion resistance of duplex stainless steel with the robust, leak-proof design mandated by the DIN 3357 standard. Our valves are designed to deliver exceptional performance and longevity in critical processes, helping you minimize downtime, reduce maintenance costs, and ensure operational safety. With our extensive experience since 2016 and a proven track record of exporting to global markets, we provide valves that meet the highest standards of precision and durability.
Our Duplex Stainless Steel Ball Valves are meticulously crafted to handle aggressive media, high pressures, and extreme temperatures. The core advantages stem from the material's unique metallurgical properties and our precise manufacturing processes.
- Superior Material Performance: Duplex stainless steel offers approximately twice the yield strength of standard austenitic stainless steels (like 304/316), providing excellent resistance to stress corrosion cracking, pitting, and crevice corrosion. This makes it ideal for chloride-containing environments, offshore applications, and chemical processing.
- Robust Flanged Design: Manufactured in compliance with DIN 3357, the flanged ends ensure a secure, standardized connection to piping systems, facilitating easy installation and maintenance. The face-to-face dimensions adhere strictly to international standards for compatibility.
- Wide Pressure and Size Range: Available from DN15 to DN200 and rated for PN16 to PN40 (equivalent to Class 150 to Class 300), this series offers versatile solutions for various system requirements, from utility lines to main process lines.
- Versatile Actuation Options: The valves can be supplied with a standard manual lever for quick operation. For larger sizes or automated systems, options include gear operators, and pneumatic or hydraulic actuators, allowing for seamless integration into control systems.
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Reliable Sealing Solutions: We offer a choice of seat materials to suit different service conditions:
Seat Material Primary Features Typical Temperature Range PTFE (Virgin) Excellent chemical resistance, low friction -20°C to 200°C Reinforced PTFE Improved mechanical strength, reduced creep -20°C to 200°C PPL (Peek) Superior high-temperature and wear resistance -29°C to 300°C Metal Seat (Stellite) For high-temperature, abrasive, or erosive services Up to 425°C - Fire-Safe Design Available: Optional fire-safe designs comply with API 607/API 6FA standards, providing an added layer of safety in hazardous areas by maintaining sealing integrity under fire conditions.
- Full Port or Standard Port: Choose between full port (full bore) design for minimal pressure drop and pigging capability, or standard port for cost-effective solutions where flow restriction is not a primary concern.
- Anti-Static and Blowout-Proof Stem: The stem is designed with anti-static devices to prevent spark hazard and is securely retained to prevent accidental blowout under pressure, enhancing operational safety.
The technical specifications below provide a clear overview of the valve's capabilities:
| Parameter | Specification |
| Body & Ball Material | Duplex Stainless Steel (UNS S31803/S32205) |
| Stem Material | Duplex Stainless Steel |
| Seat & Seal Material | PTFE, RPTFE, PPL, Metal (Selectable) |
| Size Range (Nominal Diameter) | DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200 |
| Pressure Rating | PN16, PN25, PN40 (Corresponding to ANSI Class 150, 300) |
| End Connection Standard | DIN 3357 Flanged (RF, FF face types available) |
| Face-to-Face Dimension | As per DIN 3357, API 6D |
| Test Standards | API 598, ISO 5208 |
| Operation | Lever, Gear, Pneumatic/Hydraulic Actuator (Optional) |
Choosing Shanghai Zhibang's Duplex Stainless Steel Ball Valve brings tangible benefits to your operation. You gain a component with extended service life in corrosive settings, reducing replacement frequency. The high strength-to-weight ratio allows for a more compact and lighter design compared to some alternatives, easing handling and support requirements. Its reliable performance ensures process integrity, preventing costly leaks and shutdowns. Furthermore, the standardized design guarantees easy sourcing of spare parts and simplifies maintenance procedures.
Our commitment to quality is backed by ISO9001 certification, ensuring consistent manufacturing excellence. With an annual export value ranging between US$1 Million and US$1.5 Million, our products have earned the trust of clients across diverse regions including North America, South America, Europe, Asia, Africa, and Oceania. We ship efficiently from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery to your project site. This global acceptance is a testament to the reliability and performance of our valves. Invest in a valve solution engineered for resilience and backed by a manufacturer with a solid international reputation. Contact us today for a detailed quotation or technical consultation to find the perfect valve for your specific application.
Frequently Asked Questions (FAQ)
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Q: What are the main advantages of duplex stainless steel over 316 stainless steel for ball valves?
A: Duplex stainless steel offers significantly higher yield strength and superior resistance to stress corrosion cracking and pitting, especially in chloride-rich environments. It provides better value in demanding applications where 316L might fail prematurely. -
Q: Is this valve suitable for seawater or offshore applications?
A: Yes, the duplex stainless steel construction, particularly grades like UNS S31803/S32205, is highly recommended for seawater handling, offshore platforms, and marine environments due to its excellent resistance to chloride-induced corrosion. -
Q: Can I order this valve with actuators for automated control?
A: Absolutely. We can supply these ball valves equipped with pneumatic (double-acting or spring-return) or hydraulic actuators. Electric actuators are also available upon request. Please specify your required torque, control signal, and fail-safe mode. -
Q: What is the difference between PN16, PN25, and PN40 pressure ratings?
A: These are metric pressure ratings (Pressure Nominal). PN16 is suitable for a maximum working pressure of 16 bar at ambient temperature. PN25 for 25 bar, and PN40 for 40 bar. The appropriate rating should be selected based on your system's maximum operating pressure. -
Q: Do you provide documentation like test reports and material certificates?
A: Yes, we provide essential documentation including material test certificates (MTC) in accordance with EN 10204 3.1, and hydrostatic test reports as per API 598 or ISO 5208 standards. These are available upon request. -
Q: Are spare parts like seats and seals readily available?
A: Yes, we maintain an inventory of common spare parts. Due to the standardized design, seats, seals, and stem packing kits can be easily sourced and replaced during maintenance. -
Q: What face types are available for the flanged ends?
A: The valves are typically supplied with Raised Face (RF) flanges as standard. Flat Face (FF) and Ring Type Joint (RTJ) facings can be provided as optional configurations to match your piping specifications. -
Q: What is the typical lead time for an order?
A: Lead time depends on the order quantity, size, and configuration. For standard sizes and materials, we often have stock or can deliver within 4-6 weeks. Customized orders (special actuators, materials) may require additional time. We provide precise lead time estimates with every quotation.
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