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Home > Industrial Equipment & Components > Valve > Pressure Reducing Valve > Marine Self Closing Valve 304 SS Body PTFE Seat DN25 PN16 For Shipboard Piping
Marine Self Closing Valve 304 SS Body PTFE Seat DN25 PN16 For Shipboard Piping
Product Spotlights
Marine Self Closing Valve with 304 SS body and PTFE seat ensures automatic shut-off, corrosion resistance, and reliable sealing for shipboard piping. DN25 PN16 flanged design fits standard systems. ISO9001 certified, customizable, and backed by global export experience.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Certification:
Other, ISO9001 (manufacturer level)
Body Material:
304 Stainless Steel
Seat Material:
PTFE (Polytetrafluoroethylene)
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Certification
Other, ISO9001 (manufacturer level)
Body Material
304 Stainless Steel
Seat Material
PTFE (Polytetrafluoroethylene)
Nominal Diameter
DN25 (1 inch)
Pressure Rating
PN16 (16 bar / 232 psi)
Connection Type
Flanged (available upon request)
Application
Shipboard piping systems (marine, offshore)
Valve Type
Self-closing (spring-return, automatic shut-off)
Operating Temperature
-20°C to +180°C (depending on media)
Brand
Shanghai Zhibang Valve Manufacture Co., Ltd.
Shanghai Zhibang Valve Manufacture Co., Ltd. has been a trusted manufacturer of marine-grade valves since 2016. Our Marine Self Closing Valve with 304 SS body and PTFE seat (DN25, PN16) is specifically designed for shipboard piping systems where reliability, corrosion resistance, and automatic shut-off are critical. This valve delivers a robust solution for fuel, water, and other fluid lines on vessels, ensuring safety and operational efficiency. With ISO9001-certified production processes and an annual export value of US$1–1.5 million, we provide high-quality valves that meet international marine standards.
Key Features & Technical Specifications
- Self-Closing Mechanism: Spring-loaded design ensures the valve automatically closes when pressure is released, preventing backflow and accidental spills. Ideal for emergency shut-off applications.
- 304 Stainless Steel Body: Excellent resistance to seawater, chemicals, and high temperatures. Suitable for long-term use in marine environments.
- PTFE Seat: Low friction, high durability, and chemical inertness. Ensures tight sealing and minimizes leakage even under varying pressure conditions.
- DN25 / PN16 Rating: Designed for nominal pipe size 25 mm (1 inch) and working pressure up to 16 bar (232 psi). Commonly used in shipboard fuel, cooling, and ballast systems.
- Flanged Connection: Supplied with standard flanges (EN 1092-1 / DIN) for easy installation. Other connection types (threaded, welded) are available upon request.
- Compact & Lightweight: Space-saving design fits confined areas typical of marine engine rooms and piping compartments.
- Low Maintenance: PTFE seat and stainless steel construction reduce wear, extending service life with minimal upkeep.
Technical Data Table
| Parameter | Value |
| Body Material | 304 Stainless Steel |
| Seat Material | PTFE (Teflon) |
| Nominal Diameter (DN) | 25 (1 inch) |
| Pressure Rating (PN) | 16 (16 bar / 232 psi) |
| Connection Type | Flanged (EN 1092-1) – other options customizable |
| Operating Temperature | -20°C to +180°C |
| Valve Type | Self-closing (spring return) |
| Application | Marine shipboard piping (fuel, water, ballast, etc.) |
Advantages for Your Shipboard Systems
- Enhanced Safety: Automatic closing prevents accidental discharge of hazardous fluids, reducing fire risk and environmental pollution.
- Corrosion Resistance: 304 SS body withstands saltwater, humidity, and chemical exposure typical of marine environments.
- Reliable Sealing: PTFE seat provides bubble-tight shut-off even after thousands of cycles, minimizing leakage.
- Easy Installation: Standard flanged connections allow quick retrofitting into existing piping systems. Custom dimensions available.
- Cost-Effective: Durable materials and simple design reduce replacement frequency and maintenance costs over the vessel's lifetime.
- Compliance: Manufactured under ISO9001 quality management system, ensuring consistent product quality.
Our valves are tested for pressure, seat leakage, and material integrity before shipment. Each valve comes with a test certificate and inspection report. We also offer optional actuation (pneumatic, electric) for remote control applications.
Trusted by Global Marine Operators
Since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. has been supplying marine valves to shipyards, fleet operators, and offshore platforms across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. With an annual export value of US$1–1.5 million, we have built a reputation for reliable products and responsive customer service. Our ISO9001 certification ensures that every valve leaving our Shanghai factory meets rigorous quality standards. We are ready to support your vessel's piping needs with custom solutions, competitive pricing, and timely delivery via major ports (Shanghai, Guangzhou, Hong Kong, Beijing). Contact us today to request a quote or technical datasheet.
Frequently Asked Questions (FAQ)
-
Q: What is the working principle of a marine self-closing valve?
A: It uses a spring mechanism that automatically closes the valve when the handle or actuator is released. This ensures fail-safe shut-off in emergency situations, such as a hose rupture or fire. -
Q: Can this valve be used for seawater?
A: Yes. The 304 stainless steel body and PTFE seat provide excellent corrosion resistance against seawater and are suitable for ballast, cooling, and fire-fighting systems. -
Q: Is the valve available with threaded connections instead of flanged?
A: Yes, we offer both threaded (BSP/NPT) and welded connections as custom options. Please specify when ordering. -
Q: What is the maximum operating temperature for the PTFE seat?
A: PTFE can typically handle temperatures up to +180°C (356°F). For higher temperature applications, alternative seat materials (e.g., PEEK, graphite) are available upon request. -
Q: Does the valve come with certification?
A: Yes, each valve is supplied with a material certificate and pressure test report. Our factory is ISO9001 certified, and we can provide additional type approvals (e.g., DNV, ABS) at extra cost if required. -
Q: What is the lead time for DN25 PN16 self-closing valves?
A: Standard sizes are typically in stock and can be shipped within 7–15 days after order confirmation. Custom orders may require 20–30 days. -
Q: Can I get a sample before bulk order?
A: Yes, we accept sample orders. Sample cost is negotiable, and shipping charges apply. We will refund the sample fee upon bulk order placement. -
Q: How do I maintain this valve?
A: The valve requires minimal maintenance. Periodically check the spring tension and seat condition. Lubricate the stem if needed. Refer to the user manual for detailed instructions.
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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