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Home > Industrial Equipment & Components > Valve > Ball Valve > DIN 3357 Standard Duplex Stainless Steel Ball Valve, With Locking Device and Blow-Proof Stem
DIN 3357 Standard Duplex Stainless Steel Ball Valve, With Locking Device and Blow-Proof Stem
Product Spotlights
DIN 3357 standard duplex stainless steel ball valve featuring a safety locking device and blow-proof stem. Offers superior corrosion resistance and strength for harsh environments. Ensures operational safety and reliable shut-off. Ideal for chemical, offshore, and other demanding industries. ISO9001 certified manufacturing ensures quality and consistency.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Standard:
DIN 3357
Material:
Other, Duplex Stainless Steel (e.g., UNS S31803)
Connection Type:
Flanged
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Standard
DIN 3357
Material
Other, Duplex Stainless Steel (e.g., UNS S31803)
Connection Type
Flanged
Pressure Rating
PN16, PN25, PN40, etc.
Temperature Range
-29°C to +200°C (typical)
Stem Design
Blow-Proof Stem
Safety Feature
Locking Device
Operation
Lever Handle or Gear Operator
Port Type
Full Port or Reduced Port
Seat Material
PTFE, Reinforced PTFE, PPL, etc.
As a leading manufacturer specializing in industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our premium DIN 3357 Standard Duplex Stainless Steel Ball Valve. Engineered for demanding applications, this valve combines the superior corrosion resistance of duplex stainless steel with robust safety features, including a locking device and a blow-proof stem design. It is an ideal solution for industries where reliability, safety, and long service life are paramount under harsh operating conditions.
Our valve is meticulously manufactured to meet the stringent requirements of the DIN 3357 standard, ensuring dimensional accuracy, performance consistency, and interchangeability. The duplex stainless steel construction offers excellent resistance to stress corrosion cracking, pitting, and crevice corrosion, making it suitable for a wide range of aggressive media.
Key Product Features & Technical Advantages:
- Superior Material Performance: Constructed from duplex stainless steel (typically UNS S31803/S32205), which provides nearly double the yield strength of standard austenitic stainless steels (304/316). This material offers outstanding resistance to chloride-induced stress corrosion cracking, making it perfect for offshore, chemical processing, and pulp & paper applications.
- Enhanced Safety with Locking Device: An integrated locking device allows the valve to be secured in the open or closed position. This is a critical feature for safety procedures, preventing unauthorized or accidental operation, which is essential in plant isolation and safety-critical systems.
- Blow-Proof Stem Design: The stem is designed with an anti-blowout feature, ensuring that internal pressure cannot eject the stem assembly. This design enhances operator safety and prevents potential leaks from the stem area, even under high-pressure conditions or if the packing needs adjustment.
- Robust Construction & Sealing: The valve features a sturdy, one-piece or two-piece body construction per DIN 3357. The seats are typically made from advanced polymers like PTFE or PPL, providing tight shut-off, low operating torque, and good chemical compatibility.
- Versatile Operation & Configurations: Available with a standard lever handle for quick quarter-turn operation or an optional gearbox for higher torque applications. Valves can be supplied in full port or reduced port configurations to suit flow requirements.
Detailed Technical Specifications:
| Parameter | Specification |
|---|---|
| Design Standard | DIN 3357 |
| Pressure Rating | Commonly PN16, PN25, PN40 (Class 150, 300) |
| Temperature Range | Standard: -29°C to +200°C (dependent on seat material) |
| Body & Ball Material | Duplex Stainless Steel (UNS S31803/S32205) |
| Stem Material | Duplex Stainless Steel |
| Seat & Seal Material | PTFE, Reinforced PTFE, PPL, or other options available |
| End Connection | Flanged as per DIN/EN/ANSI standards |
| Fire Safe Design | Optional, available upon request |
| Locking Device | Standard, padlockable (lock not included) |
Benefits for Your Operations:
- Extended Asset Life: The corrosion resistance of duplex steel significantly reduces maintenance needs and replacement frequency, lowering total cost of ownership.
- Improved Plant Safety: The combination of the locking device and blow-proof stem directly contributes to a safer working environment, helping you comply with stringent health and safety regulations.
- Reliable Performance: Adherence to DIN 3357 guarantees reliable performance, leak-tight shut-off, and easy integration into existing piping systems that follow European standards.
- Wide Market Acceptance: Our valves are trusted and exported globally to markets including North America, South America, Europe, Southeast Asia, Africa, and the Middle East.
Backed by our ISO9001:2015 certified quality management system, every valve undergoes rigorous testing—including shell tests, seat tests, and operational checks—before shipment. With an annual export value ranging between US$1 Million to US$1.5 Million and major shipment ports like Shanghai, Guangzhou, and Hong Kong, we have the experience and logistics capability to serve clients worldwide efficiently. Choose Shanghai Zhibang for a valve solution that delivers durability, safety, and peace of mind. Contact us today for a quotation or to discuss your specific application requirements.
Frequently Asked Questions (FAQ):
-
Q: What are the main advantages of duplex stainless steel over 316 stainless steel for ball valves?
A: Duplex stainless steel offers significantly higher strength (approximately double the yield strength) and superior resistance to stress corrosion cracking, particularly in chloride-containing environments. This translates to longer service life and better suitability for demanding applications like offshore or chemical processing. -
Q: How does the locking device function? Is it compliant with any safety standards?
A: The locking device is a mechanical feature that allows a padlock (not supplied) to be inserted, securing the lever handle in either the open or closed position. This is a common requirement for lockout/tagout (LOTO) procedures, aiding compliance with workplace safety standards aimed at preventing accidental energization of lines during maintenance. -
Q: Can this valve be used for both on/off service and throttling?
A: While ball valves are primarily designed for quick on/off service, they can be used for limited throttling. However, for prolonged throttling applications, especially with abrasive fluids, other valve types may be more suitable to avoid premature seat erosion. -
Q: What flange standards are available for this DIN 3357 valve?
A: The valve body is flanged as per the DIN 3357 standard, which is compatible with EN (European) flange dimensions. We can also supply valves with face-to-face dimensions and drilling to match ANSI/ASME standards upon request to ensure compatibility with your specific piping. -
Q: Is the "blow-proof stem" feature tested?
A> Yes, the blow-proof stem design is a fundamental safety feature. It is validated during factory pressure testing, where the valve is subjected to pressures above its rated capacity to ensure the stem cannot be ejected under extreme conditions. -
Q: What is the typical lead time for this product?
A: Lead times vary based on size, pressure rating, and quantity. Standard configurations often have shorter lead times. We recommend contacting our sales team with your specific requirements for an accurate delivery schedule. -
Q: Are other end connections besides flanged available?
A: The DIN 3357 standard primarily defines flanged-end valves. For other connection types like threaded (NPT/BSP) or welded ends, different product lines would be more appropriate. Please inquire about your specific connection needs. -
Q: Do you provide documentation like test certificates and material reports?
A> Yes, as an ISO9001 certified manufacturer, we can provide standard inspection reports and test certificates. More detailed documentation, such as material chemical and mechanical test reports (3.1 material certificates), can be supplied upon request.
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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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