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Home > Industrial Equipment & Components > Valve > Check Valve > Marine Check Valve Ductile Iron Epoxy Coated DN50-DN300 PN1.0-1.6MPa Flanged End BV Certificate Ballast System
Marine Check Valve Ductile Iron Epoxy Coated DN50-DN300 PN1.0-1.6MPa Flanged End BV Certificate Ballast System
Product Spotlights
Ductile iron body with high-build epoxy coating provides exceptional corrosion resistance for marine ballast systems. Flanged ends DN50-DN300, PN1.0-1.6MPa. Designed for low pressure drop and reliable backflow prevention. ISO9001 certified manufacturer with export experience to global markets.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Material:
Other, Ductile Iron
Application:
Other, Ballast System
Standard:
Other, ISO9001 Certified
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Other, Ductile Iron
Application
Other, Ballast System
Standard
Other, ISO9001 Certified
coating
Epoxy Coated
size_range
DN50 - DN300
pressure_rating
PN1.0 - PN1.6 MPa
connection_type
Flanged End
valve_type
Swing Type / Lift Type (optional)
color
Blue / Black (customizable)
Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our Marine Check Valve – a high-performance, ductile iron valve designed specifically for demanding ballast systems and marine applications. Manufactured in our Shanghai facility since 2016, every valve undergoes strict quality control to ensure reliable backflow prevention, corrosion resistance, and long service life. With an epoxy-coated finish and flanged ends in sizes DN50 to DN300, this valve meets the rigorous standards of shipbuilders and offshore operators worldwide.
Key Features & Technical Specifications
- Material: Ductile iron body (GGG40/GGG50 equivalent) provides superior strength and impact resistance compared to cast iron.
- Coating: High-build epoxy coating (250–300 microns) applied inside and out for excellent protection against seawater, chemicals, and abrasion.
- Temperature Range: -10°C to +120°C (suitable for most marine fluids).
- End Connection: Flanged to EN 1092-1 / PN10 or PN16, with drilling patterns compatible with international standards.
- Operation: Automatic – opens by forward flow and closes when flow reverses, preventing backflow and water hammer.
- Design Options: Available in swing-type or lift-type disc configuration (consult factory for application-specific recommendations).
- Testing: 100% hydrostatic shell and seat test before shipment.
| Parameter | Specification |
|---|---|
| Size Range | DN50 – DN300 (2" – 12") |
| Pressure Rating | PN1.0 / PN1.6 MPa (150 / 232 psi) |
| Body Material | Ductile Iron GGG40 (EN-JS1020) |
| Disc Material | Ductile Iron + Epoxy Coating (or optional SS316) |
| Seat Material | EPDM / NBR (optional Viton for high temperature) |
| Coating Thickness | 250 – 300 microns |
| Flange Standard | EN 1092-1 (PN10/PN16) / ANSI B16.5 (Class 150 available upon request) |
Advantages for Your Ballast System
- Corrosion Resistance: The epoxy coating is specifically formulated for marine environments, resisting saltwater corrosion and reducing maintenance frequency.
- Low Pressure Drop: Streamlined disc design minimizes flow resistance, ensuring efficient ballast operations.
- Durability: Ductile iron body withstands vibration and shock loads common in shipboard piping.
- Easy Installation: Flanged ends allow quick bolting between standard pipe flanges, reducing downtime.
- Cost-Effective: Competitively priced without compromising on quality – a smart choice for shipyards and fleet operators.
Trust Behind the Valve
Shanghai Zhibang Valve Manufacture Co., Ltd. has been a dedicated manufacturer since 2016, with an annual export value of US$1 million to US$1.5 million. Our products are shipped to major ports including Shanghai, Guangzhou, Hong Kong, and Beijing, and are trusted by markets across North America, South America, Europe, Southeast Asia, Africa, and Oceania. We are ISO9001 certified, ensuring consistent quality management. With extensive experience in marine valves, we understand the critical need for reliability in ballast systems. Every Marine Check Valve is backed by our professional after-sales support and technical team. Contact us today for a competitive quotation or to discuss your custom requirements.
Frequently Asked Questions (FAQ)
-
Q1: What is the difference between swing check and lift check types?
A: Swing check valves have a hinged disc that swings open with forward flow, suitable for horizontal or vertical installations with low pressure drop. Lift check valves have a disc that lifts vertically; they are better for high-pressure applications and require a straight piping section. We can supply both types based on your system requirements. -
Q2: Can this valve be used for seawater ballast systems?
A: Yes, the ductile iron body with epoxy coating is specifically designed for seawater resistance. We recommend EPDM seat material for seawater compatibility. Please specify your fluid type when ordering. -
Q3: Does the valve meet international flange standards?
A: The flanges are manufactured to EN 1092-1 PN10/PN16 as standard. If you require ANSI B16.5 Class 150, please inform us and we can provide a compatible option. -
Q4: What is the temperature limit of the epoxy coating?
A: Standard epoxy coating can withstand continuous temperatures up to 120°C. For higher temperature applications (up to 200°C), we offer optional PTFE lining or stainless steel disc. -
Q5: How do you ensure quality before delivery?
A: Each valve undergoes a hydrostatic shell test at 1.5 times the rated pressure and a seat leakage test. Additionally, our ISO9001 quality system ensures traceability of materials and production records. -
Q6: What is the typical lead time for DN50-DN300?
A: Standard sizes (DN50 to DN150) are usually shipped within 15–20 working days. Larger sizes (DN200–DN300) may require 25–30 working days. Urgent orders can be expedited upon request. -
Q7: Do you offer customized coatings or colors?
A: Yes, we can customize the coating color (e.g., RAL 5015 blue, RAL 9005 black) and thickness. Please provide your specifications for a tailored solution. -
Q8: Is the valve suitable for vertical installation?
A: For swing check valves, vertical installation (with flow upward) is acceptable. For lift check valves, horizontal installation is preferred. We recommend consulting our technical team for your specific orientation.
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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