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Help CenterDirect Marine Dual Plate Check Valve for Ballast Water Systems, Corrosion Resistant, Full Lining Option
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Product Overview
As a professional manufacturer with over 8 years of experience in valve production, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our Direct Marine Dual Plate Check Valve specifically engineered for ballast water systems. Our valve combines corrosion-resistant materials with a full lining option, delivering reliable backflow prevention in harsh marine environments. Built with precision and durability in mind, this check valve ensures minimal pressure loss and long service life, making it a trusted choice for shipbuilders, offshore operators, and marine engineering projects worldwide.
Key Features & Technical Benefits
- Corrosion Resistance: Constructed from high-grade ductile iron or cast steel with optional full rubber/PTFE lining, providing excellent protection against seawater, brine, and other corrosive media.
- Dual Plate Design: Lightweight yet robust dual plates enable rapid closing with minimal water hammer, ensuring system safety during pump shutdowns.
- Full Lining Option: Available with a complete lining (e.g., EPDM, PTFE) covering all wetted surfaces, ideal for aggressive ballast water treatment chemicals.
- Space-Saving Wafer Style: Compact design fits between flanges, reducing installation footprint and weight on ship piping systems.
- Low Pressure Drop: Streamlined flow path minimizes energy loss, contributing to overall system efficiency.
- Easy Maintenance: External spring and hinge design allows quick inspection and replacement without removing the valve from the pipeline.
- Flexible Orientation: Suitable for horizontal or vertical installation (optional spring assist for vertical lines).
Technical Specifications (Typical)
| Specification | Value / Option |
| Size Range | DN50 – DN600 (2" – 24") |
| Pressure Rating | PN10 / PN16 / Class 150 (others available upon request) |
| Body Material | Ductile Iron (GGG40 / GGG50) or Cast Steel (WCB) |
| Lining Material (Optional) | EPDM, PTFE, or other elastomers |
| Disc Material | Ductile Iron / Stainless Steel (316 optional) |
| Seat Material | NBR / EPDM / PTFE |
| Operating Temperature | -20°C to +120°C (wider range customizable) |
| End Connections | Wafer (Lug style optional) |
| Compliance Standards | Manufactured under ISO9001 quality system; design meets API 594 and EN 593 (references) |
Why Choose Our Direct Marine Dual Plate Check Valve?
- Marine-Grade Reliability: Each valve is tested for sealing performance and pressure integrity before shipment, ensuring flawless operation in demanding ballast water applications.
- Customized Full Lining: Our in-house lining process guarantees uniform coverage and strong adhesion, preventing media corrosion and extending valve life.
- Global Shipping Flexibility: With shipments from Shanghai, Guangzhou, Hong Kong, and Beijing, we provide fast delivery to North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East.
- Competitive Pricing & OEM Support: As a direct manufacturer, we offer factory-direct prices and can customize valves per your drawings or technical requirements.
- Proven Export Track Record: Annual export value of US$1 million to US$1.5 million demonstrates our capability to serve international clients.
Frequently Asked Questions (FAQ)
Q1: Is this check valve suitable for seawater ballast systems with high salinity?
A: Yes. The valve can be supplied with full EPDM or PTFE lining which provides excellent resistance to seawater and dissolved salts. Standard body materials are also corrosion-protected with epoxy coating.
Q2: What is the maximum operating temperature?
A: Standard temperature range is -20°C to +120°C. For higher temperature applications (up to 200°C), we can upgrade the seat and lining materials as per request.
Q3: Can this valve be installed vertically?
A: Yes, the dual plate design operates in both horizontal and vertical pipelines. For vertical upward flow, a light spring option is available to assist closing.
Q4: Do you provide spare parts for maintenance?
A: Absolutely. We supply individual plates, springs, pins, and seat rings. Our standard design allows easy field replacement without special tools.
Q5: What certifications does your company hold?
A: Our manufacturing facility is certified under ISO9001:2015. Each valve is tested per our internal quality procedures, and we can provide material certificates, test reports, and a Certificate of Conformance upon request.
Q6: What is the typical lead time for bulk orders?
A: For standard sizes (DN50-DN300), delivery is within 15-25 working days after receipt of deposit. Customized sizes or lining may require 30-40 working days, depending on quantity.
Q7: Can I get a sample valve for testing before bulk order?
A: Yes, sample orders are welcome. We can supply one unit with negotiated terms. Sample cost and freight are discussed individually.
Q8: How do you ensure leak-free performance?
A: Each valve undergoes hydrostatic shell test and seat leakage test per API 598. Our dual plate design provides bubble-tight shutoff in the reverse flow direction.
Trust & Reliability
Since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. has built a reputation for delivering high-quality valves to global markets. With an annual export value surpassing US$1 million, we serve clients across more than 20 countries and regions. Our products have been adopted in shipbuilding yards, offshore platforms, and marine retrofitting projects, earning positive feedback for their corrosion resistance and long-term durability.
We understand the critical role of a check valve in ballast water management—any failure can lead to costly downtime or regulatory non-compliance. That's why we design our dual plate check valves to exceed industry standards, backed by rigorous testing and full traceability. Whether you need standard valves or customized full-lining solutions, we are ready to support your marine projects with competitive pricing and professional after-sales service.
Contact us today for a quotation or technical consultation. Let our marine valve expertise help your ballast system operate smoothly.
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