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Help CenterBronze Body Marine Check Valve, Class Society Approved, DN15-DN300, PN1.0-6.4MPa
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Shanghai Zhibang Valve Manufacture Co., Ltd., founded in 2016 and ISO9001 certified, specializes in producing high-quality Bronze Body Marine Check Valves that meet the rigorous requirements of international classification societies. Our valves are engineered for reliable backflow prevention in marine pipelines, shipbuilding, and offshore platforms, covering a wide size range from DN15 to DN300 and pressure ratings from PN1.0 to PN6.4 MPa.
As a dedicated manufacturer with an annual export value of US$1–1.5 million, we serve customers across North America, Europe, Asia, Africa, and Oceania. Each valve is produced under strict quality control and can be supplied with approval certificates from major classification societies such as ABS, DNV, LR, BV, and others (upon request). Our bronze check valves offer excellent corrosion resistance, extended service life, and low maintenance, making them an ideal choice for seawater, oil, gas, and other marine media.
Product Features & Technical Specifications
- Material Excellence: High-grade bronze (C95800 or equivalent) provides outstanding resistance to seawater corrosion, dezincification, and erosion.
- Class Society Approval: Designed and manufactured in accordance with standards of ABS, DNV, LR, BV, CCS, and other classification societies (specific approval available on request).
- Wide Pressure Range: Suitable for PN1.0 up to PN6.4 MPa, covering low to medium pressure marine systems.
- Various Connection Types: Flanged (GB, JB, ISO, JIS, ASME), threaded, or wafer ends available to fit different piping systems.
- Reliable Sealing: Metal-to-metal or optional soft seat (NBR/EPDM) for bubble-tight shutoff.
- Low Pressure Drop: Optimized disc design minimizes flow resistance and head loss.
- Easy Maintenance: Top-entry or bolted cover design allows quick inspection and service without removing from pipeline.
| Size Range | DN15 – DN300 (1/2" – 12") |
| Pressure Rating | PN1.0 – PN6.4 MPa (Class 150 – 400) |
| Working Temperature | -20°C to 200°C (depending on seat material) |
| Body Material | Bronze (C95800, B62, etc.) |
| Trim Material | Bronze / Stainless Steel / Monel (optional) |
| End Connection | Flanged (RF, FF), Threaded (NPT/BSP), Wafer |
| Applicable Media | Seawater, fresh water, oil, gas, and other non-aggressive fluids |
| Standards | GB/T 13932, JB/T 8937, ISO 5208, ASME B16.34 |
Our bronze marine check valves are rigorously tested for shell strength, seat leakage, and functional operation. Each valve undergoes hydrostatic and pneumatic testing in accordance with ISO 5208, ensuring zero leakage performance. The valves are designed for easy installation in horizontal or vertical pipelines, with spring-assisted closure for quick response to reverse flow.
Key Benefits for Your Application
- Marine Durability: Bronze withstands harsh saltwater environments, reducing replacement frequency.
- Class Society Compliance: Simplifies vessel certification and meets international marine safety requirements.
- Versatile Sizing: Full range DN15–DN300 covers small auxiliary lines to main seawater cooling systems.
- Cost-Effective: Competitive pricing with OEM/ODM capabilities for large projects.
- Global Logistics: Shipped from Shanghai, Guangzhou, Hong Kong, or Beijing ports with fast lead times.
At Shanghai Zhibang Valve, we combine over 8 years of manufacturing expertise with a commitment to quality. Our ISO9001 certification ensures consistent production processes, and our valves are exported to 30+ countries. With an annual export value exceeding US$1 million, we have earned the trust of shipyards, offshore operators, and industrial end-users worldwide. We invite you to contact us for detailed quotations, technical drawings, or custom solutions. Our experienced team will support you from inquiry to after-sales service.
Frequently Asked Questions
Q1: What are the available connection types for your bronze check valves?
A: We offer flanged (RF or FF), threaded (NPT, BSP), and wafer connections. For special requirements, we can customize end connections per your piping standard.
Q2: Which classification society certificates can you provide?
A: Our valves can be supplied with approval certificates from ABS, DNV, LR, BV, CCS, RINA, and others upon request. We have experience with multiple class societies and can meet the specific certification needs of your project.
Q3: Can you produce valves for seawater desalination or oil tanker systems?
A: Yes, our bronze check valves are widely used in seawater cooling, ballast, fire fighting, and cargo systems. The corrosion-resistant material and certified design make them suitable for various marine applications.
Q4: What is the minimum order quantity (MOQ)?
A: For standard sizes and materials, our MOQ is 5 pieces. For special sizes or materials, please inquire. We are flexible and can accommodate small trial orders.
Q5: How long is the lead time?
A: Typical lead time is 15–30 working days depending on quantity and specification. For urgent orders, we can expedite production after confirmation.
Q6: Do you offer warranty?
A: We provide a 12-month warranty from the date of shipment against manufacturing defects. Extended warranty is available on request.
Q7: Can I get a sample before mass production?
A: Yes, we can provide samples for evaluation. Sample cost and shipping are negotiable, and the cost is refundable upon bulk order.
Q8: Are your valves suitable for high-vibration marine environments?
A: Yes, our spring-assisted check valve design provides positive closure even under vibration. The robust bronze body and internal components ensure reliable operation in demanding conditions.
Choose Shanghai Zhibang Valve as your trusted partner for bronze marine check valves. Contact us today to discuss your specifications, request a quote, or receive a free technical consultation. We are ready to support your marine projects with quality valves and professional service.
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