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Help CenterFlanged Marine Check Valve DN50-DN300 PN1.0-1.6MPa Ductile Iron Epoxy Coated BV Approved for Ballast Water
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Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016 with an annual export value of US$1–US$1.5 million, is a professional manufacturer dedicated to high-quality valve solutions for marine and industrial applications. Our Flanged Marine Check Valve (DN50–DN300, PN1.0–1.6MPa) is expertly designed to meet the rigorous demands of ballast water systems. Made from durable ductile iron with an epoxy coating and bearing BV approval, this valve ensures reliable flow control and long service life in the toughest marine environments.
This check valve is engineered to prevent backflow in piping systems, a critical function for ballast water management, cooling water lines, and other marine fluid systems. Its flanged connection allows for easy installation and maintenance, while the robust ductile iron body provides excellent strength and corrosion resistance. The epoxy coating adds an extra layer of protection against seawater and chemicals, meeting the stringent requirements of the maritime industry.
Key Features & Technical Benefits
- Wide Size Range: Available from DN50 to DN300, covering a broad spectrum of pipeline diameters for various marine systems.
- Moderate to High Pressure Ratings: PN1.0 to PN1.6 MPa pressure classes suitable for typical ballast water and general marine applications.
- Ductile Iron Construction: Offers superior tensile strength and impact resistance compared to gray iron, ensuring reliability under pressure surges.
- Epoxy Coating (Internal & External): Provides excellent corrosion and abrasion protection, extending service life in seawater environments.
- BV Approved: Third-party type approval from Bureau Veritas, confirming compliance with international marine standards for safety and performance.
- Flanged Ends: Conforms to ISO 7005 / EN 1092-2 flanges, simplifying integration into existing pipework.
- Quick Acting: Spring-assisted disc or tilting disc design ensures rapid closure to minimize reverse flow and water hammer.
- Low Pressure Drop: Optimized flow path reduces energy loss, improving overall system efficiency.
Technical Specifications
| Parameter | Value |
|---|---|
| Size Range | DN50 – DN300 (2” – 12”) |
| Pressure Rating | PN1.0 – PN1.6 (10 – 16 bar) |
| Material – Body | Ductile Iron (GGG50 / QT450-10 equivalent) |
| Coating | Epoxy, fusion bonded (min. 250 µm thickness) |
| Flange Standard | EN 1092-2, PN10/PN16 |
| Temperature Range | -10°C to +80°C (water service) |
| Type Approval | BV (Bureau Veritas) |
Why Choose Our Marine Check Valve?
- Designed for Ballast Water Systems: Complies with IMO D2 discharge standards and other regulations, as required by modern ballast water treatment systems.
- Corrosion Resistance: The epoxy coating combined with ductile iron offers excellent resistance to seawater, brine, and chemical-laden ballast water.
- Easy Maintenance: Flanged connections allow quick removal for inspection or replacement without cutting pipes.
- Customizable Options: Available with different disc types (swing, tilting, spring-loaded) and coatings (e.g., nylon, rubber lining) upon request.
- Long Service Life: Properly selected and installed, these valves can operate reliably for decades under normal marine conditions.
Company Strengths & Trust Factors
As a dedicated manufacturer with an ISO9001-certified quality management system, Shanghai Zhibang Valve ensures every valve is tested and inspected before shipment. Our annual export value of US$1–US$1.5 million reflects the trust of clients across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. We ship from major Chinese ports (Shanghai, Guangzhou, Hong Kong, Beijing) with reliable logistics and competitive lead times.
With over 7 years of experience in valve production, we understand the critical nature of marine systems. Our Flanged Marine Check Valve is extensively used in ballast water systems on cargo ships, tankers, and offshore platforms. We provide technical documentation, including material certificates and test reports, to support your project requirements.
Contact us today to request a quotation or technical datasheet. Our team is ready to assist you with the right valve configuration for your ballast water system.
Frequently Asked Questions
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Q: What is the difference between PN10 and PN16 pressure ratings?
A: PN10 and PN16 refer to nominal pressure in bar. PN16 valves can withstand higher pressure (16 bar) than PN10 (10 bar). Choose the rating that matches your system design pressure. -
Q: Is this valve suitable for horizontal and vertical installations?
A: Yes, it can be installed in both orientations, though horizontal installation with the disc hinge oriented properly is recommended to minimize wear. -
Q: Does the epoxy coating meet FDA or potable water standards?
A: The epoxy coating is marine-grade and suitable for seawater and industrial water. For potable water, a special coating may be required – please consult our sales team. -
Q: What gasket types are provided with the flanges?
A: Standard gaskets are non-asbestos (e.g., NBR or compressed fiber). Custom gaskets (PTFE, spiral wound) are available on request. -
Q: Can I get BV certificate for each batch?
A: Yes, we provide BV certificate as per order requirement. Additional third-party inspection (e.g., by DNV, Lloyds) can also be arranged at extra cost. -
Q: What is the lead time for DN200 size?
A: Typical lead time for standard DN200 valves is 15-30 days after order confirmation, depending on quantity and coating specifications. -
Q: Does the valve include test reports?
A: Yes, each valve is hydrostatically tested and a test report is included. Material certificates are available upon request. -
Q: How do I select the correct disc type for my application?
A: For ballast water with low flow resistance and no reverse flow, a swing check is common. For water hammer sensitive systems, a spring-assisted check is recommended. Our engineers can advise.
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