Contact Platform Support
Help CenterReliable Marine Dual Plate Check Valve Factory, Fast Prototype Delivery, Technical Drawings Support
Product Spotlights
Related Products
-
Forged Steel Marine Dual Plate Check Valve, Integral Seat, Class 300, Flanged Ends, PTFE/Graphite PackingNegotiableMOQ: 1 Unit -
Reliable Marine Dual Plate Check Valve for Compressed Air, Cast Iron Body, Rubber Seal, DN50-DN200, Wafer Factory Direct With Technical SupportNegotiableMOQ: 1 Unit
-
Cast Iron Marine Dual Plate Check Valve for Compressed Air, DN50-DN200, PN1.0-1.6MPa, Wafer, Rubber Seal, CCS CertifiedNegotiableMOQ: 1 Unit
-
Marine Dual Plate Check Valve for Compressed Air, Cast Iron, Rubber Lined, DN50-DN200, PN1.0-1.6MPa, Wafer Connection, CCSNegotiableMOQ: 1 Unit
-
PN1.0-1.6MPa Marine Dual Plate Check Valve for Compressed Air, Cast Iron, Rubber Seal, DN50-DN200, Wafer, CCS CertifiedNegotiableMOQ: 1 Unit
Shanghai Zhibang Valve Manufacture Co., Ltd. – your trusted partner for marine dual plate check valves designed to withstand demanding marine environments while ensuring absolute reliability. As an ISO 9001:2015 certified manufacturer established in 2016, we combine years of engineering excellence with a customer-centric approach. Our fast prototype delivery (typically 3–5 working days) and full technical drawing support (2D/3D CAD files upon request) help you accelerate project timelines without compromising quality. Whether you need a standard configuration or a custom solution for a specialized application, our team is ready to support you from concept to production.
Product Overview – The dual plate check valve (also known as a wafer check valve) is a compact, lightweight non-return valve designed to prevent backflow in piping systems. Its dual spring-loaded plates close automatically when flow reverses, minimizing water hammer and protecting downstream equipment. Perfect for marine, offshore, and industrial applications where space and weight are critical.
Key Features & Benefits
- Compact Wafer Design – Reduces installation space and weight by up to 50% compared to swing check valves; ideal for tight marine piping layouts.
- Spring-Assisted Closure – Ensures rapid, positive shut-off even in vertical or horizontal lines; prevents slamming and minimizes water hammer.
- Low Pressure Drop – Streamlined flow path and optimized disc profile maintain system efficiency, reducing energy consumption.
- Wide Material Selection – Available in stainless steel (SS316/SS316L), carbon steel (WCB/WCC), duplex, and super duplex for seawater resistance and corrosive media.
- Full Interchangeability – Designed to fit between standard flanges (ASME, DIN, JIS) – suitable for retrofitting existing systems without modification.
- Fast Prototype & Technical Support – Get a working sample within days; our engineers provide detailed 2D/3D drawings, hydraulic calculations, and material certifications to meet your project specs.
- Customizable Options – End connections (wafer, lug, flanged), sealing materials (PTFE, NBR, EPDM, Metal), and coating colors (RAL code) are all configurable.
Technical Specifications
| Size Range | DN40 ~ DN600 (1.5" ~ 24") |
| Pressure Rating | Class 150, 300, 600, 900, 1500, 2500 (PN10 ~ PN420) |
| Standards Compliance | API 594, API 6D, BS 1868, EN 593 (optional) |
| Temperature Range | -29°C ~ +425°C (depends on sealing material) |
| Leakage Rate | Zero leakage (metal seat) or |
| Body Materials | WCB, WCC, CF8, CF8M, Duplex 2205, Super Duplex 2507 |
| Disc Materials | SS304, SS316, Duplex, Alloy 20, Monel (available upon request) |
| Seat Materials | PTFE, RPTFE, NBR, EPDM, Viton, Metal (Stellite overlay) |
Why Choose Shanghai Zhibang?
Since 2016, we have been dedicated to manufacturing high-performance valves for global markets. Our ISO 9001:2015 certified quality management system ensures consistent product excellence. Each dual plate check valve undergoes hydraulic testing (shell & seat test) per API 598, and we provide full inspection reports with every shipment. With an annual export value of US$1–1.5 million, we supply to North America, South America, Europe, Southeast Asia, Africa, Oceania, the Middle East, and beyond. Our engineering team offers free technical proposal drawings within 24 hours of inquiry, and prototype samples can be delivered in as fast as 3 working days for standard sizes. We understand the urgency of marine projects – that’s why we prioritize rapid response and flexible customization.
Trust the Numbers: Over 500 successful projects delivered to marine and industrial customers worldwide. Our valves have been installed on cargo ships, offshore platforms, desalination plants, and oil refineries. We invite you to contact us today to request a quotation, technical drawing, or free prototype sample. Let our reliable dual plate check valve be the silent guardian of your pipeline system.
📌 Need a custom design or urgent delivery?
Send us your requirements (pressure, temperature, flange standard, and material preference), and our engineering team will provide a complete technical proposal with CAD files within 24–48 hours.
Frequently Asked Questions
Q1: Can the dual plate check valve be installed in vertical lines?
Yes, our spring-assisted design allows reliable operation in both horizontal and vertical upward flow (inclined or vertical). The spring ensures the discs close quickly even without gravity assistance. However, for vertical downward flow, please consult our engineers to confirm suitability.
Q2: What materials do you recommend for seawater service (marine applications)?
For seawater resistance, we recommend super duplex stainless steel (e.g., UNS S32750) for the body and discs, with PTFE or metal seats. We also offer optional coatings (like epoxy or nylon) to enhance corrosion protection. Please provide the specific medium and operating parameters for a tailored recommendation.
Q3: How fast can you deliver a prototype or sample?
For standard sizes (DN50–DN300) and common materials, prototype samples can be ready within 3–5 working days. Custom sizes or alloys may take 7–10 working days. We can also arrange express shipping for urgent needs.
Q4: Do you provide technical drawings (2D/3D) before purchase?
Absolutely. We provide free dimensional drawings (PDF/DWG) and 3D models (STEP/IGES) upon request. Our technical team will work with your engineers to ensure the valve fits perfectly into your system.
Q5: What standards do your valves comply with?
Our dual plate check valves are designed and tested per API 594, API 6D, and BS 1868. We also manufacture to ASME B16.34, EN 593, and other international standards. Face-to-face dimensions follow ISO 5752 (series 48) or API 594, depending on the series.
Q6: Can you customize the color or apply special coatings?
Yes, we offer painting and coating according to customer specifications (RAL codes, epoxy paint, hot-dip galvanizing, etc.). Please note that excessive coating may affect the tightness of the flange gasket – our engineers will advise on the best method.
Q7: What is the typical lead time for bulk orders (e.g., 50–100 pieces)?
For standard configurations, bulk production takes about 20–30 working days after prototype approval. We can arrange faster delivery for partial quantities. All shipments are made from Shanghai, Guangzhou, Hong Kong, or Beijing ports.
Q8: What warranty do you offer?
We provide a standard 12-month warranty from the date of shipment against manufacturing defects. Extended warranty is available upon request. During the warranty period, we will replace or repair any defective parts free of charge (excluding misuse or improper installation).
Send Inquiry to This Supplier
You May Also Like
-
Wafer Type Marine Dual Plate Check Valve for Compressed Air, Cast Iron, Rubber Disc, DN50-DN200, PN1.6MPa, CCS CertifiedNegotiableMOQ: 1 Unit
-
DN50-DN200 Marine Dual Plate Check Valve for Compressed Air, Cast Iron Body, Rubber Seat, PN1.0-1.6MPa, Wafer, CCS ApprovedNegotiableMOQ: 1 Unit
-
Offshore Compressed Air Pipeline Marine Dual Plate Check Valve, Cast Iron, Rubber Seal, DN50-DN200, PN1.6MPa, Wafer, CCSNegotiableMOQ: 1 Unit
-
Marine Dual Plate Check Valve for Compressed Air, Cast Iron, Rubber Seat, DN50-DN200, PN1.0-1.6MPa, Wafer, 1-Year Warranty and Mill Test ReportNegotiableMOQ: 1 Unit
-
Flanged Dual Plate Check Valve DN50-DN300 PN16-PN40 NBR Seal for Ship Fuel Oil LinesNegotiableMOQ: 1 Unit
-
Marine Dual Plate Check Valve DN50-DN300 Cast Steel NBR Seal PN1.6-4.0MPa for Oil SystemsNegotiableMOQ: 1 Unit
-
Wafer Type Dual Plate Check Valve Cast Steel Body LR Approved 1.6-4.0MPa for Marine Oil PipelinesNegotiableMOQ: 1 Unit
-
Ship Oil Pipeline Check Valve Dual Plate Design for Lubricating Oil and Hydraulic Oil SystemsNegotiableMOQ: 1 Unit
-
Marine Check Valve Dual Plate 150LB-300LB Cast Steel NBR for Fuel Oil Transfer SystemsNegotiableMOQ: 1 Unit
-
Dual Plate Check Valve for Oil Systems Cast Steel Body Standard Compliant NBR Seal Factory Direct SupplyNegotiableMOQ: 1 Unit
