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Home > Industrial Equipment & Components > Valve > Check Valve > Swing Marine Check Valve for Ship Ballast Water System Ductile Iron Epoxy Coated DN50-DN300 PN1.0-1.6MPa Flanged
Swing Marine Check Valve for Ship Ballast Water System Ductile Iron Epoxy Coated DN50-DN300 PN1.0-1.6MPa Flanged
Product Spotlights
Ductile iron swing check valve with epoxy coating for ship ballast water systems. DN50-DN300, PN1.0-1.6MPa flanged. ISO9001 certified manufacturer since 2016. Low pressure drop, corrosion resistant, easy maintenance. Suitable for seawater, customizable port locations.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Material:
Other, Ductile Iron
Application:
Other, Ship ballast water system
Standard:
Other, ISO9001
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, Ship ballast water system
Standard
Other, ISO9001
Connection Type
Flanged
Nominal Diameter
DN50 - DN300
Pressure Rating
PN1.0 - PN1.6 MPa
Coating
Epoxy Coated
Type
Swing check valve
Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our Swing Marine Check Valve for Ship Ballast Water System — a high-performance solution engineered specifically for demanding marine environments. Manufactured from premium ductile iron and protected by a durable epoxy coating, this valve ensures reliable backflow prevention in ballast water pipelines. With a wide size range from DN50 to DN300 and pressure ratings of PN1.0 to PN1.6MPa, it offers flexibility for various shipboard installations. As a trusted ISO9001-certified manufacturer since 2016, we combine precision engineering with rigorous quality control to deliver valves that meet the rigorous needs of global shipping fleets.
Key Features & Technical Specifications
- Durable Ductile Iron Body — Offers superior strength and corrosion resistance compared to cast iron, ensuring long service life in seawater environments.
- Epoxy Coating (Internal & External) — Provides excellent protection against saltwater corrosion and chemical attack, extending valve longevity.
- Swing Disc Design — Optimized flow path minimizes pressure drop; gravity-assisted closing prevents water hammer.
- Flanged End Connections — Compliant with international flange standards (e.g., ISO, DIN, BS) for easy installation and sealing.
- Wide Size Range (DN50–DN300) — Accommodates various pipeline diameters in ballast water systems.
- Pressure Ratings (PN1.0–PN1.6MPa) — Suitable for low to medium pressure applications typical in ship ballast systems.
- Low Maintenance Requirement — Simple internal structure with replaceable seat and disc for easy servicing.
- Compact & Lightweight — Compared to conventional globe check valves, the swing type offers a more compact envelope.
Product Specifications Table
| Parameter | Value |
|---|---|
| Material | Ductile Iron (GGG40/GGG50 equivalent) |
| Coating | Epoxy (minimum 250 microns thickness) |
| Nominal Diameter | DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300 |
| Pressure Rating | PN1.0 MPa / PN1.6 MPa |
| Connection Type | Flanged (RF face; drilling to ISO 7005-2, ASME B16.5 optional) |
| Operating Temperature | -10°C to +80°C (for standard version) |
| Application | Ship ballast water systems, seawater cooling, fire fighting |
| Certification | ISO9001:2015 (quality management system) |
Why Choose Our Swing Marine Check Valve?
- Proven Reliability — Designed with a heavy-duty hinge pin and reinforced disc to withstand repeated slamming in high-flow conditions.
- Corrosion Resistance — Epoxy coating certified for saltwater immersion; internal components available in stainless steel or bronze upon request.
- Compliance with Marine Standards — Manufactured in accordance with ISO, IMO, and classification society requirements (customization available).
- Ease of Installation — Standard flanged ends allow direct bolting to existing pipelines without special adaptors.
- Competitive Pricing — As a direct manufacturer, we offer factory pricing with no middlemen, ensuring cost savings.
- Global Shipping — We export from Shanghai, Guangzhou, Hongkong, and Beijing ports to over 40 countries across North America, Europe, Asia, Africa, and Oceania.
Since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. has been a dedicated supplier of fluid control solutions to the maritime industry. With annual export value exceeding US$1 million and a strong presence in both domestic and international markets, we have earned the trust of shipbuilders, system integrators, and vessel operators worldwide. Our ISO9001 certification reflects our commitment to consistent quality and continuous improvement. Every swing check valve is hydrostatically tested at 1.5 times the rated pressure, and our quality team performs 100% visual and dimensional inspections before shipment. When you choose Zhibang, you choose a partner that stands behind its products with responsive after-sales support and technical expertise. Contact us today for a quote or custom specification — we look forward to serving your ballast water system needs.
Frequently Asked Questions
-
Q: What is the difference between a swing check valve and a lift check valve?
A: A swing check valve uses a hinged disc that swings open with forward flow and closes with reverse flow, offering lower pressure drop. Lift check valves have a spring-loaded disc that lifts vertically, making them better for high-pressure applications but with higher resistance. -
Q: Can this valve be used for seawater applications other than ballast water?
A: Yes, the epoxy coating and ductile iron body are suitable for seawater cooling, bilge, and fire-fighting systems. However, we recommend confirming the specific chemical compatibility with our technical team. -
Q: What flange standards are available?
A: Our standard flanges are manufactured to ISO 7005-2 (PN10/PN16). We can also supply ASME B16.5 Class 150 flanges upon request at no extra cost for DN50–DN300. -
Q: Is the valve maintenance-friendly?
A: Yes, the bonnet is bolted for easy access to the disc, seat, and hinge pin. Replacement parts are available and can be fitted by trained personnel without special tools. -
Q: What is the expected service life under normal conditions?
A: With proper installation and regular inspection (e.g., checking coating integrity and sealing surfaces), the valve typically lasts 10–15 years in ballast water service. Actual life depends on water quality and operating frequency. -
Q: Do you offer custom pressure ratings or sizes outside DN300?
A: Yes, we can develop special sizes (e.g., DN350, DN400) and pressure ratings (e.g., PN2.5MPa) based on minimum order quantities and technical feasibility. Please contact us with your requirements. -
Q: How is the valve shipped?
A: Each valve is individually packed with flanges protected by plastic caps, then securely palletized and wrapped with stretch film. We ship by sea or air from Shanghai, Guangzhou, Hongkong, or Beijing per your instruction. -
Q: What quality tests are performed before delivery?
A: Every valve undergoes shell hydrostatic test (1.5× rated pressure), seat leakage test (at 0.1MPa and rated pressure), and visual/dimensional inspection. A test certificate is included with each order.
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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