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Home > Industrial Equipment & Components > Valve > Pressure Reducing Valve > 304 Stainless Steel Marine Self Closing Valve DN15-DN50 PN16 Flanged End Automatic Closing
304 Stainless Steel Marine Self Closing Valve DN15-DN50 PN16 Flanged End Automatic Closing
Product Spotlights
304 Stainless Steel construction ensures superior corrosion resistance in marine environments. Automatic spring-return closing provides fail-safe operation, preventing backflow and flooding. Flanged ends (DN15-DN50, PN16) allow easy installation. ISO9001 certified manufacturer with global export experience, offering customizable options for seals, disc materials, and marine certifications.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Material:
Other, 304 Stainless Steel
Standard:
ISO9001, Marine Class (optional)
size_range:
DN15-DN50 (1/2“-2“)
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Other, 304 Stainless Steel
Standard
ISO9001, Marine Class (optional)
size_range
DN15-DN50 (1/2“-2“)
pressure_rating
PN16 (16 bar)
connection_type
Flanged End (DIN/ANSI optional)
application
Marine, Shipbuilding, Offshore
type
Self Closing (Automatic Spring Return)
color
Natural metal (polished/brushed available)
body_design
Wafer or Lug type (optional)
disc_material
304 Stainless Steel (optional 316)
Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016 with an annual export value of US$1–1.5 million, proudly presents the 304 Stainless Steel Marine Self Closing Valve (DN15–DN50, PN16, Flanged End, Automatic Closing). Designed for demanding marine and industrial environments, this valve ensures reliable automatic shut-off to prevent backflow, flooding, and system contamination. Its robust 304 stainless steel construction and spring-loaded closing mechanism guarantee long service life with minimal maintenance, making it a trusted choice for shipbuilding, offshore platforms, and water treatment systems.
This automatic closing valve incorporates a spring-return actuator that instantly closes the valve when pressure drops or manual operation is released. The flanged end design allows easy installation and secure connection to piping systems. Available in sizes from DN15 to DN50, with a nominal pressure rating of PN16 (16 bar), it meets the rigorous demands of marine classification societies. Below we detail its key features, technical specifications, and benefits to help you select the right valve for your project.
Key Features
- Durable 304 Stainless Steel Construction: Resists corrosion from seawater, chemicals, and humidity, ideal for marine and offshore applications.
- Automatic Spring-Return Closing: Ensures fail-safe operation – valve closes automatically upon loss of control pressure or manual release, preventing backflow and accidental spills.
- Flanged Ends Standard: Designed to DIN/ANSI flange standards (upon request) for easy integration with existing piping systems. Sizes DN15–DN50.
- PN16 Pressure Rating: Suitable for systems up to 16 bar (232 psi) at ambient temperature, ensuring reliable performance under moderate pressure conditions.
- Low Maintenance: Simple design with few moving parts reduces wear and tear. The spring mechanism is enclosed for protection against debris.
- Versatile Applications: Perfect for bilge systems, cooling water lines, fuel transfer, ballast systems, and other marine piping circuits.
- Optional Enhancements: Available with 316 stainless steel disc, manual override, position indicator, or special coatings for higher corrosion resistance.
Technical Specifications
| Parameter | Value |
|---|---|
| Valve Type | Self Closing (Automatic Spring Return) |
| Body Material | 304 Stainless Steel (CF8) |
| Disc Material | 304 Stainless Steel (316 optional) |
| Size Range | DN15, DN20, DN25, DN32, DN40, DN50 (1/2" to 2") |
| Pressure Rating | PN16 (16 bar / 232 psi) |
| Connection | Flanged End (DIN/ANSI options) |
| Temperature Range | -20°C to +120°C (depending on seal) |
| Seal Material | PTFE (standard), EPDM or NBR (optional) |
| Actuation | Spring Return (automatic, fail-safe close) |
| Certification | ISO9001:2015; Marine classification (upon request) |
Benefits for Your Application
- Enhanced Safety: The automatic closing feature eliminates human error, reducing the risk of accidental flooding or cross-contamination in critical marine systems.
- Corrosion Resistance: 304 stainless steel withstands aggressive marine environments, prolonging valve life and reducing replacement costs.
- Easy Installation: Flanged ends allow quick bolting to matching flanges without special tools. Standard sizes fit most piping layouts.
- Reliable Operation: Spring mechanism is tested for over 10,000 cycles, ensuring consistent performance even in remote or unmanned locations.
- Cost-Effective: Competitive pricing combined with long service life offers excellent value for shipbuilders and industrial operators.
At Shanghai Zhibang Valve, we have been manufacturing high-quality valves since 2016, exporting to over 15 countries including North America, Europe, Southeast Asia, and Africa. Our ISO9001-certified production processes ensure every valve meets strict quality standards. With an annual export value of US$1–1.5 million, we have built a reputation for reliable delivery and technical support. We ship from Shanghai, Guangzhou, Hong Kong, and Beijing ports, ensuring timely delivery worldwide. Choose our 304 Stainless Steel Marine Self Closing Valve for your next project – contact us today for a quotation or technical consultation.
Frequently Asked Questions
-
Q: What is the difference between a self-closing valve and a check valve?
A: A self-closing valve uses a spring to automatically close the valve when the operating handle is released or pressure drops, providing a positive shut-off. A check valve relies on flow direction to prevent backflow but does not close automatically when flow stops – it requires reverse flow. Our self-closing valve is ideal for manual or remote control applications where fail-safe closure is needed. -
Q: Can this valve be used for potable water systems?
A: Yes, 304 stainless steel is suitable for potable water. However, we recommend checking if any local regulations require specific seal materials (e.g., EPDM or NBR) for drinking water. We can supply with appropriate seals upon request. -
Q: What is the maximum operating temperature for this valve?
A: The standard PTFE seal handles temperatures from -20°C to +120°C. For higher temperatures, please consult us for alternative seal materials such as Graphite or Metal seal. -
Q: Is the spring mechanism replaceable?
A: Yes, the spring assembly is designed to be serviceable. Replacement springs are available as spare parts. We recommend periodic inspection every 6 months in high-cycle applications. -
Q: Can I get the valve with a locking device or position indicator?
A: Yes, we offer optional accessories including a lockable handle, position indicator (open/closed), and manual override. Please specify your requirements when ordering. -
Q: Do you provide marine classification certificates like Lloyd's or DNV?
A: We can supply valves with third-party inspection and certification according to classification societies (e.g., CCS, BV, ABS, DNV, Lloyds) upon request. Please contact our sales team with your specific requirements. -
Q: What is the lead time for standard sizes?
A: For standard DN15-DN50 sizes, our lead time is typically 7–15 working days depending on quantity. Custom orders or special materials may require 20–30 days. Please confirm with our sales team. -
Q: How do I select the correct size for my system?
A: The valve size should match the pipeline nominal diameter. For assistance with flow rate calculations or pressure drop, please provide your system parameters (flow rate, pressure, medium) to our technical support team.
Send Inquiry to This Supplier
1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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