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Help CenterMarine Self Closing Drain Valve Bronze Body DN15-DN50 PN1.0-2.5MPa Threaded Connection
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Shanghai Zhibang Valve Manufacture Co., Ltd. presents our premium Marine Self Closing Drain Valve with a durable bronze body, designed for reliable performance in demanding marine environments. Available in sizes from DN15 to DN50 and pressure ratings from PN1.0 to PN2.5MPa, these valves feature a threaded connection for easy installation. As a dedicated manufacturer established in 2016, we combine years of engineering expertise with strict quality control, ensuring each valve meets the rigorous demands of shipbuilding, offshore platforms, and industrial drainage systems. Our self-closing mechanism enhances safety by preventing accidental flooding or backflow, making it an essential component for any vessel or marine facility.
Key Features & Technical Specifications
- High-Quality Bronze Body – Resistant to seawater corrosion, providing long service life in harsh marine conditions.
- Self-Closing Mechanism – Automatically closes when not manually held open, preventing accidental overflow and enhancing operational safety.
- Threaded Connection – Available in BSP or NPT threads for easy integration with existing piping systems.
- Wide Size Range – DN15 (1/2") to DN50 (2") to suit various drain line requirements.
- Pressure Capability – Rated from PN1.0 to PN2.5MPa (10–25 bar / 145–362 psi), suitable for low to medium pressure systems.
- ISO9001 Certified – Manufactured under a quality management system ensuring consistent product reliability.
- Optional Coatings – Additional anti-corrosion paint or nickel plating available upon request for extended durability.
| Parameter | Specification |
|---|---|
| Body Material | Bronze (C95800 / equivalent) |
| Nominal Diameter (DN) | 15, 20, 25, 32, 40, 50 |
| Pressure Rating | PN1.0 / PN1.6 / PN2.5MPa |
| Connection Type | Threaded (BSP or NPT) |
| Operating Temperature | -20°C to +120°C |
| Seal Material | NBR / EPDM (optional) |
| Application | Marine drainage, bilge, ballast, and sanitary systems |
Customer Benefits: By choosing the Zhibang Marine Self Closing Drain Valve, you gain a reliable solution that reduces the risk of water ingress and flooding. The corrosion-resistant bronze body ensures minimal maintenance, while the self-closing feature provides peace of mind for crew and operators. Threaded connections simplify installation, and the wide pressure range accommodates various system designs. Each valve is rigorously tested before shipment, guaranteeing leak-free performance.
Trust & After-Sales Support
As a manufacturer with annual export value of US$1–1.5 million, Shanghai Zhibang Valve has supplied valves to markets across North America, South America, Europe, Asia, Africa, and Oceania. Our ISO9001 certification reflects our commitment to quality. We ship from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery. For bulk orders, customized sizes, or special coatings, please contact our sales team. We offer responsive after-sales support and technical consultation to assist with your specific marine drainage requirements.
Frequently Asked Questions
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Q: What is the typical lifespan of this valve in seawater?
A: The bronze body provides excellent corrosion resistance; with proper maintenance, the valve can last over 10 years. -
Q: Can I get the valve with NPT threads instead of BSP?
A: Yes, both BSP and NPT thread options are available. Please specify your requirement when ordering. -
Q: Does the valve close automatically even if the handle is released?
A: Yes, the spring-loaded self-closing mechanism ensures the valve closes automatically when not manually held open. -
Q: What is the maximum working pressure for DN50 size?
A: The DN50 valve is rated up to PN2.5MPa (25 bar). For higher pressures, please consult our engineers. -
Q: Is the valve suitable for below-deck bilge systems?
A: Absolutely, it is designed for marine drainage including bilge, ballast, and sanitary overboard discharges. -
Q: Do you provide a test certificate with each valve?
A: Yes, we can provide a material test certificate and pressure test report upon request. -
Q: What is the minimum order quantity for this product?
A: Generally, no minimum quantity for standard sizes; custom orders may require a minimum quantity.
Contact us today for a quote or technical inquiry. Our team is ready to assist you with delivering the right marine valve solution for your project.
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