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Help CenterMarine Check Valve for Ballast Water System Ductile Iron Body Epoxy Lined DN50-DN300 PN1.0-1.6MPa Flanged Type
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Shanghai Zhibang Valve Manufacture Co., Ltd. presents our premium Marine Check Valve for Ballast Water System, engineered with a ductile iron body and an epoxy-lined interior for superior corrosion resistance in harsh marine environments. Designed specifically for ballast water management, these flanged check valves are available in sizes DN50 to DN300 with pressure ratings PN1.0 to PN1.6MPa, ensuring reliable backflow prevention and long service life. Our valves are manufactured under strict quality controls, backed by our ISO9001-certified facility, and trusted by clients across global markets including North America, Europe, and Southeast Asia.
Key Features & Technical Specifications
- Robust Construction: The ductile iron body provides high tensile strength and impact resistance, ideal for heavy-duty marine applications.
- Epoxy Lining: A thick, uniform epoxy coating protects against seawater corrosion, scaling, and chemical attack, extending valve life significantly.
- Flanged Ends: Standard flanged connections (DIN/ANSI/JIS available upon request) ensure easy installation and leak-proof sealing.
- Low Pressure Drop: Optimized flow path minimizes energy loss, enhancing system efficiency.
- Reliable Sealing: Resilient or metal-to-metal seat options provide tight shut-off under varying pressure conditions.
- Wide Operating Range: Suitable for fresh water, seawater, and treated ballast water at temperatures from -10°C to 80°C (customizable).
Dimensions & Pressure Ratings
| Size (DN) | Pressure Rating (PN) | Flange Standard | Weight (approx. kg) |
|---|---|---|---|
| DN50 | PN1.0 - 1.6 | DIN/ANSI | 3.5 |
| DN100 | PN1.0 - 1.6 | DIN/ANSI | 8.2 |
| DN200 | PN1.0 - 1.6 | DIN/ANSI | 22.5 |
| DN300 | PN1.0 - 1.6 | DIN/ANSI | 38.0 |
The check valve is designed for vertical or horizontal installation (horizontal recommended for gravity-assisted closing), with a compact face-to-face dimension conforming to international standards. Each unit undergoes hydrostatic testing at 1.5x rated pressure and seat leakage testing per ISO 5208.
Why Choose Our Marine Check Valve?
- Corrosion Resistance: Epoxy lining meets NAVSEA or equivalent standards for ballast water applications.
- Low Maintenance: Simple construction with fewer moving parts reduces wear and tear.
- Certified Quality: Manufactured in an ISO9001 facility with traceable material certificates.
- Custom Options: Available with different seat materials (EPDM, PTFE, metal), coating colors, and flange drilling patterns.
- Global Shipping: We ship from Shanghai, Guangzhou, Hong Kong, and Beijing ports to worldwide destinations.
Our engineering team can also provide tailored solutions for high-temperature, high-pressure, or special media applications upon request.
Trust & Reliability
Shanghai Zhibang Valve Manufacture Co., Ltd. (established 2016) is a dedicated manufacturer with an annual export value of US$1–1.5 million, serving markets across North America, South America, Europe, Asia, Africa, and Oceania. Our valves are used in ballast water systems on commercial vessels, offshore platforms, and marine terminals, earning positive feedback for durability and performance. With ISO9001 certification, rigorous testing protocols, and a responsive after-sales team, we ensure every valve meets your expectations. Contact us today for a quote or technical datasheet – we are ready to support your marine projects with high-quality check valves.
Frequently Asked Questions (FAQ)
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Q: What media can this check valve handle?
A: It is designed for ballast water (seawater, freshwater) and can also handle treated effluents within the temperature range -10°C to 80°C. For aggressive chemicals, consult our team. -
Q: Is the valve suitable for vertical pipeline installation?
A: Yes, but for optimal sealing, we recommend horizontal installation or vertical with upward flow. Spring-assisted versions are available for vertical lines. -
Q: What is the standard flange drilling pattern?
A: Default flanges are drilled per DIN PN10/16. ANSI Class 150 or JIS 10K patterns are available as options. -
Q: Do you provide material certificates?
A: Yes, we provide mill certificates for the ductile iron body and epoxy coating traceability upon request. -
Q: What is the expected service life?
A: With proper installation and maintenance, the valve can last 10–15 years in ballast water service. The epoxy lining significantly extends protection against corrosion. -
Q: Can the valve be customized for higher pressure?
A: Yes, we can manufacture versions up to PN2.5MPa (or equivalent) with reinforced design. Please contact us with your requirements. -
Q: What packing and shipping options do you offer?
A: Each valve is individually packed in plywood cases with cushioning. We ship via sea freight from Shanghai, Guangzhou, Hong Kong, or Beijing. -
Q: What warranty do you provide?
A: We offer a 12-month warranty from shipment date against manufacturing defects. Extended warranty is negotiable.
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