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Help CenterDual Plate Check Valve Cast Iron Marine DN300 PN1.6MPa Wafer Connection Stainless Steel Disc EPDM Seal 1 Year Warranty
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Welcome to Shanghai Zhibang Valve Manufacture Co., Ltd. We are a professional manufacturer with ISO9001 certification, established in 2016, and our annual export value ranges from US$1 million to US$1.5 million. Our Dual Plate Check Valve Cast Iron Marine DN300 PN1.6MPa is engineered for reliable backflow prevention in demanding marine and industrial systems. Combining a robust cast iron body, a lightweight stainless steel disc, and a durable EPDM seal, this valve offers excellent corrosion resistance and tight shut-off. Designed with a wafer connection, it is easy to install between flanges and saves space in piping layouts.
The dual plate design minimizes pressure drop and responds quickly to flow changes, ensuring system safety and efficiency. Whether you need a check valve for seawater cooling, ballast systems, or general water applications, this product delivers consistent performance under high-pressure conditions. We take pride in offering a one-year warranty and comprehensive technical support.
Key Features and Benefits
- Compact Wafer Design – Fits between standard flanges, reduces installation space and weight.
- Cast Iron Body – Provides high strength and excellent durability for marine environments.
- Stainless Steel Disc – Offers superior corrosion resistance and long service life.
- EPDM Seal – Ensures reliable shut-off against backflow, compatible with fresh water, sea water, and many chemicals.
- Low Pressure Drop – Streamlined flow path minimizes energy loss.
- Rapid Closing Action – Prevents water hammer and protects downstream equipment.
- ISO9001 Certified Manufacturing – Consistent quality control from raw material to final testing.
- 1-Year Warranty – Guarantee of product reliability and after-sales support.
Technical Specifications
| Size | DN300 (12 inch) |
| Pressure Rating | PN1.6MPa (232 psi) |
| Body Material | Cast Iron (GG25) |
| Disc Material | Stainless Steel (SS304) |
| Seal Material | EPDM (optional: NBR, Viton) |
| Connection Type | Wafer (ANSI Class 150, DIN PN10/16) |
| Operating Temperature | -20°C to +80°C (depending on seal material) |
| Applicable Medium | Fresh water, sea water, oil, gas (application-specific) |
| Face-to-Face Dimension | EN 558 Series 14 (or API 609) |
| Testing Standards | API 598 / ISO 5208 (hydrostatic shell and seat test) |
This valve is specifically designed for marine applications such as engine cooling water, fire fighting systems, and ballast water management. The stainless steel disc and EPDM seal resist corrosion from saltwater, ensuring a long operational life even in harsh offshore environments. Its wafer configuration reduces weight by up to 50% compared to conventional swing check valves, making it ideal for space-constrained installations.
Why Choose Shanghai Zhibang Valve?
Our company, established in 2016 and located in Shanghai, China, has built a strong reputation for manufacturing high-quality valves. With ISO9001 certification, we follow strict quality management procedures from material procurement to final testing. Our annual export value of US$1–1.5 million demonstrates our commitment to serving international clients across North America, South America, Europe, Southeast Asia, Africa, and Oceania. We offer flexible shipping from Shanghai, Guangzhou, Hong Kong, and Beijing ports. Each Dual Plate Check Valve is individually tested and comes with a one-year warranty against manufacturing defects. Our experienced technical team can provide customized solutions for non-standard requirements (e.g., special disc materials, coatings, or larger sizes).
We understand that a reliable check valve is crucial for system safety and operational efficiency. Our product not only meets industry standards but also delivers consistent performance in the most demanding conditions. By choosing Zhibang, you benefit from professional support, competitive pricing, and timely delivery. Contact us today for a quotation or technical consultation.
Frequently Asked Questions (FAQ)
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Q: Can this valve be installed vertically or horizontally?
A: Yes, the dual plate check valve can be installed in both horizontal and vertical pipelines, provided the flow direction is upward for vertical installations to ensure proper disc closing. -
Q: What is the maximum operating temperature for the EPDM seal?
A: Standard EPDM can withstand temperatures from -20°C to +80°C. For higher temperatures, we offer optional seal materials such as NBR (-10°C to +80°C) or Viton (-20°C to +200°C). Please specify when ordering. -
Q: Does this valve come with flanges?
A: No, it is a wafer type valve designed to be clamped between two pipe flanges (ANSI or DIN). The valve itself does not include flanges. The required bolts and nuts are not included, but we can provide them upon request. -
Q: What kind of media can this valve handle?
A: It is suitable for clean water, seawater, light oils, and non-aggressive gases. For aggressive chemicals or abrasive media, please consult our engineers for material upgrades. -
Q: Is the valve fully tested before shipment?
A: Yes, every valve undergoes a hydrostatic shell test at 1.5 times the rated pressure and a seat leakage test according to API 598 or ISO 5208. Test certificates are available upon request. -
Q: How long is the delivery time for DN300 size?
A: Standard delivery is 15–25 working days after order confirmation, depending on quantity. For urgent orders, we can expedite with an additional fee. -
Q: Do you provide a manufacturer's warranty?
A: Yes, we offer a 1-year warranty from the date of shipment covering manufacturing defects. Any issues due to improper use or installation are not covered. -
Q: Can I get a sample before placing a large order?
A: Absolutely. We accept sample orders, and the sample cost can be deducted from the first mass order. Please contact our sales team for details.
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