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Help CenterMarine Self Closing Valve For Ballast Water System Cast Steel Body Flanged Connection
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Shanghai Zhibang Valve Manufacture Co., Ltd., a trusted ISO9001 certified manufacturer since 2016, proudly presents our Marine Self Closing Valve for Ballast Water System. Designed with a robust cast steel body and flanged connection, this valve ensures reliable automatic shut-off in critical marine applications, preventing backflow and protecting ballast pipelines. Our valves are engineered to meet the rigorous demands of international shipping, with annual export values exceeding US$1 million and shipments to over 15 global markets including North America, Europe, and Southeast Asia.
This self-closing valve is a vital component for ballast water management systems, offering exceptional durability and low maintenance. The cast steel body provides superior strength against corrosion and high-pressure environments, while the flanged connection simplifies installation and ensures leak-proof sealing. Whether for new vessel construction or retrofit projects, our valve delivers consistent performance under harsh marine conditions.
Key Features & Technical Specifications
- Self-Closing Mechanism: Automatically closes upon loss of flow or pressure, preventing accidental discharge and ensuring system safety.
- Cast Steel Body: High-quality cast steel (ASTM A216 WCB or equivalent) offers excellent tensile strength and resistance to seawater corrosion.
- Flanged Connection: Standard ANSI/ASME B16.5 flanges (Class 150/300) for easy alignment and secure bolting.
- Ballast Water System Compatibility: Designed for use in ballast lines, overboard discharge, and tank filling systems.
- Low Maintenance: Simple internal design with replaceable sealing components reduces downtime.
- Optional Coatings: Available with epoxy or zinc-rich paint for enhanced corrosion protection (upon request).
| Parameter | Specification |
|---|---|
| Material | Cast Steel (ASTM A216 WCB) |
| Connection Type | Flanged (ANSI B16.5, Class 150/300) |
| Size Range | DN50 – DN600 (2" – 24") |
| Pressure Rating | PN10/16/25 (customizable) |
| Operating Temperature | -20°C to +200°C |
| Application | Marine ballast water systems |
| Certification | ISO9001:2015 |
Advantages for Your Business
- Enhanced Safety: Automatic closure reduces risk of ballast water overflow or contamination.
- Long Service Life: Cast steel construction withstands high-pressure surges and saltwater corrosion.
- Easy Installation: Flanged ends allow direct mounting to standard pipe flanges, saving labor time.
- Global Compliance: Meets IMO D-2 ballast water performance standards (when used with treatment systems).
- Customizable Options: Available with different flange drills, coatings, and actuation types (manual or pneumatic).
At Shanghai Zhibang Valve, we have been manufacturing high-quality valves since 2016, serving customers across North America, South America, Europe, Asia, Africa, and Oceania. Our annual export value of US$1–1.5 million reflects our commitment to global standards. Every valve undergoes rigorous quality control – from raw material inspection to pressure testing – ensuring reliable performance in demanding marine environments.
We ship from major ports including Shanghai, Guangzhou, and Hong Kong, offering flexible logistics to meet your project deadlines. With ISO9001 certification and a dedicated team of engineers, we provide technical support and after-sales service you can trust. Choose our marine self-closing valve for your ballast water system and experience the difference of professional manufacturing.
Frequently Asked Questions
-
Q: What is the working principle of this self-closing valve?
A: The valve automatically closes when the flow stops or reverses, using a spring-loaded disc or clapper mechanism. It prevents backflow and maintains pressure integrity in the ballast line. -
Q: Is this valve suitable for both saltwater and freshwater ballast systems?
A: Yes, the cast steel body with optional corrosion-resistant coating is designed for both saltwater and freshwater environments. -
Q: Can the valve be fitted with a manual override?
A: Yes, we can provide a manual lock-open or lock-close option upon request for maintenance or emergency situations. -
Q: What flange standards are available?
A: Standard flanges are ANSI B16.5 Class 150/300, but we can also supply DIN, JIS, or GB flanges as per your requirements. -
Q: What is the typical lead time?
A: For standard sizes (DN50-DN300), lead time is 15–25 working days after order confirmation. Larger sizes may require 30–45 days. -
Q: Do you provide test certificates?
A: Yes, we provide material certificates, hydrostatic test reports, and ISO9001 certification upon request. -
Q: Can the valve be used in horizontal or vertical pipelines?
A: It is designed for horizontal installation, but vertical installation is possible with proper support and spring adjustment (consult our engineers). -
Q: What is the warranty period?
A: We offer a standard 12-month warranty against manufacturing defects from the date of shipment.
Contact Shanghai Zhibang Valve today for a quotation or technical consultation. Your reliable partner in marine valve solutions.
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