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Home > Industrial Equipment & Components > Valve > Check Valve > Factory Direct Marine Dual Plate Check Valve DN450 Ductile Iron Body Stainless Steel Disc Wafer Type Standard Compliant
Factory Direct Marine Dual Plate Check Valve DN450 Ductile Iron Body Stainless Steel Disc Wafer Type Standard Compliant
Product Spotlights
Factory direct DN450 marine dual plate check valve with ductile iron body and stainless steel disc. Wafer type saves space and reduces weight. Low pressure drop, quick closing prevents water hammer. ISO9001 certified, 100% pressure tested. Customizable seat material and pressure rating. Suitable for seawater, oil, gas. Competitive pricing from Shanghai Zhibang Valve.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Standard:
Other, Compliant with industry standards
Application:
Other, Marine and industrial piping systems
Body Material:
Ductile Iron
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Standard
Other, Compliant with industry standards
Application
Other, Marine and industrial piping systems
Body Material
Ductile Iron
Disc Material
Stainless Steel
Size
DN450 (18 inch)
Type
Wafer Type
Connection
Wafer (between flanges)
Pressure Rating
Available upon request
Shanghai Zhibang Valve Manufacture Co., Ltd – a trusted ISO9001 certified manufacturer since 2016 – proudly presents our Factory Direct Marine Dual Plate Check Valve DN450. Engineered with a rugged ductile iron body and stainless steel disc, this wafer type check valve delivers reliable backflow prevention in demanding marine environments. Our annual export value of US$1–1.5 million across global markets (North America, Europe, Asia, Africa, Oceania, and more) reflects the confidence customers place in our quality. This valve combines durability, compact design, and strict compliance with international standards, making it an ideal choice for seawater, oil, gas, and water treatment applications.
Below you’ll find a detailed technical breakdown and the key benefits that set our DN450 check valve apart.
Key Features & Technical Specifications
- Body Material: Ductile iron (ASTM A536 Grade 60-40-18) – high strength, corrosion resistance, and impact toughness suitable for marine use.
- Disc Material: Stainless steel (SS304 or SS316 optional) – excellent resistance to seawater and aggressive fluids.
- Seat Material: EPDM / NBR / Viton (customizable) – ensures tight shut-off and long service life.
- Size: DN450 (18 inch) – wafer style for compact installation between flanges.
- Pressure Rating: CL150 / CL300 / PN10 / PN16 (available upon request).
- Operating Temperature: -20°C to +120°C (depending on seat material).
- Design Standard: API 594, ISO 5752, or equivalent – compliant with marine classification requirements.
- End Connection: Wafer type, fits EN 1092-1, ANSI B16.5, or JIS flanges.
- Testing: 100% hydrostatic & pneumatic test prior to shipment.
Technical Parameter Table
| Parameter | Value / Option |
|---|---|
| Nominal Diameter | DN450 (18”) |
| Body Material | Ductile Iron (GJS 400-15) |
| Disc Material | SS304 / SS316 / Duplex (optional) |
| Seat Material | EPDM, NBR, Viton (customizable) |
| Pressure Rating | CL150 / CL300 / PN10 / PN16 |
| Operating Temperature | -20°C ~ +120°C |
| Design Standard | API 594 / ISO 5752 / DIN 3840 |
| Face-to-Face Dimension | Per API 594 Table A |
| Test Pressure (Shell) | 1.5 × Rated Pressure |
| Test Pressure (Seat) | 1.1 × Rated Pressure |
Advantages & Customer Benefits
- Space-Saving Design: Wafer type means shorter face-to-face length compared to swing check valves – ideal for tight piping layouts on ships and offshore platforms.
- Low Pressure Drop: Lightweight dual plates open fully even at low flow rates, reducing energy consumption in pumping systems.
- Quick Closing: Dual disc design minimizes water hammer and slamming, protecting piping and equipment from pressure surges.
- Corrosion Resistance: Ductile iron body combined with stainless steel disc and optional elastomer lining ensures long life in seawater and chemical environments.
- Easy Maintenance: All internal parts can be replaced without removing the valve from the pipeline – reduces downtime and maintenance cost.
- Factory Direct Pricing: As a manufacturer, we eliminate middlemen – you get competitive prices with consistent quality control from raw material to finished product.
- Global Shipping Flexibility: Available from Shanghai, Guangzhou, Hong Kong, Beijing ports – fast delivery to North America, Europe, Middle East, Asia, and Oceania.
Trust & Reliability
With ISO9001 certification and six years of specialization, Shanghai Zhibang Valve has supplied over 50,000 check valves to marine, oil & gas, and water treatment projects worldwide. Our annual export value of US$1–1.5 million and presence in 15+ markets (including North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Middle East, and Western Europe) demonstrate our commitment to international quality standards. Every DN450 dual plate check valve undergoes 100% pressure testing and dimensional inspection before leaving our factory. Choose Zhibang – your reliable partner for marine valve solutions.
Frequently Asked Questions
-
Q: What is the working pressure of the DN450 dual plate check valve?
A: The standard pressure ratings are CL150, CL300, PN10, and PN16. Custom pressures are available upon request. Please consult our sales team for your specific requirements. -
Q: Can this valve be used for seawater applications?
A: Yes, the stainless steel disc (SS316) and ductile iron body with appropriate seat elastomer (e.g., EPDM) provide excellent resistance to seawater corrosion. -
Q: What flange standards does the wafer type fit?
A: The valve is designed to fit between flanges per ANSI B16.5, EN 1092-1, and JIS B2210 standards. Adapters are not required. -
Q: Is the valve bidirectional?
A: Standard dual plate check valves are unidirectional. The flow direction is indicated by an arrow on the body. For bidirectional applications, please inform us for custom design. -
Q: What is the minimum flow rate to fully open the disc?
A: The cracking pressure is typically 0.005–0.01 MPa (0.7–1.45 psi), depending on disc weight and spring tension. Full opening is achieved at around 0.1 m/s flow velocity. -
Q: Do you provide third-party inspection certificates?
A: Yes, we can arrange inspection by SGS, BV, or other agencies at the buyer's cost. Our standard test report is included with every shipment. -
Q: What is the lead time for DN450 valves?
A: For standard materials and quantity (1–20 pieces), lead time is 15–25 working days. Larger orders require 30–45 days. Contact us for exact schedule. -
Q: How do you ensure the quality of the valve?
A: Our ISO9001 quality system covers incoming material control, in-process inspection, and final hydrostatic/pneumatic testing. Each valve is marked with a unique serial number for traceability.
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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