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Help CenterDual Plate Check Valve for Marine Ballast Water System Cast Iron DN500 PN1.0MPa Stainless Steel Disc EPDM Seal 12 Months Warranty
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Shanghai Zhibang Valve Manufacture Co., Ltd. takes pride in presenting our high-performance Dual Plate Check Valve specifically designed for marine ballast water systems. Engineered from premium cast iron with a robust stainless steel disc and EPDM seal, this DN500 valve operates reliably under PN1.0MPa pressure. As a trusted manufacturer established in 2016 with ISO9001 certification and annual exports exceeding US$1 million, we ensure every valve meets stringent marine industry standards. Our dual plate check valve minimizes water hammer, reduces maintenance, and offers exceptional durability for ballast water management applications.
The dual plate design is a non-slam check valve that allows full flow with minimal pressure drop. The wafer-style body is lightweight yet strong, making installation between flanges quick and space-efficient. The stainless steel disc (SS304 or SS316 available upon request) provides excellent corrosion resistance against seawater, while the EPDM seal ensures tight shut-off and longevity in harsh marine environments. Each valve undergoes rigorous hydrostatic testing (body test at 1.5 times rated pressure, seat test at 1.1 times) to guarantee zero leakage.
Key Features & Technical Advantages
- Non-Slam Operation: Spring-assisted closure prevents water hammer and protects pipeline integrity.
- Compact Wafer Design: Short face-to-face dimensions reduce weight and installation costs.
- Corrosion Resistance: Cast iron body with epoxy coating (optional) and stainless steel internals resist seawater corrosion.
- Low Pressure Drop: Streamlined flow path ensures efficient ballast water handling.
- Bidirectional Sealing: EPDM seal provides bubble-tight shut-off in both flow directions (optional).
- Easy Maintenance: Simple cartridge design allows quick replacement of internal parts without removing valve from pipeline.
- 12-Month Warranty covers manufacturing defects, ensuring peace of mind.
Technical Specifications
| Parameter | Specification |
|---|---|
| Size Range | DN50 – DN600 (DN500 as standard) |
| Pressure Rating | PN1.0MPa (10 bar) – higher ratings available upon request |
| Body Material | Cast Iron (GGG40 / Ductile Iron optional) |
| Disc Material | Stainless Steel (SS304 standard, SS316 optional) |
| Seal Material | EPDM (NBR, Viton optional) |
| End Connection | Wafer type between flanges (EN1092 / ANSI B16.5) |
| Operating Temperature | -20°C to +120°C (EPDM); customizable |
| Applicable Standards | ISO 9001, API 594 / API 6D compliant design |
Why Choose Shanghai Zhibang for Your Marine Ballast Water Valves?
Since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. has specialized in producing high-quality industrial valves for global markets. With an annual export value of US$1 million – US$1.5 million, we serve clients across North America, South America, Europe, Asia, Africa, and Oceania. Our ISO9001-certified facility in Shanghai ensures strict quality control from raw material inspection to final testing. We offer flexible shipping from Shanghai, Guangzhou, Hong Kong, and Beijing ports.
Our dual plate check valves are trusted by marine engineering companies for ballast water treatment systems due to their reliability and long service life. We provide customizable options including different disc materials, seal elastomers, coatings, and pressure ratings to meet specific project requirements. Each valve comes with a 12-month warranty covering material and workmanship defects.
Backed by our experienced team and commitment to quality, we respond to inquiries within 24 hours and offer competitive pricing without compromising performance. Choose Shanghai Zhibang for valves that deliver value, safety, and peace of mind in demanding marine environments. Contact us today for a quote or technical consultation – we look forward to supporting your ballast water system projects.
Frequently Asked Questions
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Q: Is this valve suitable for seawater ballast water systems?
A: Yes, the cast iron body with epoxy coating (optional) and stainless steel disc, combined with EPDM seal, provide excellent resistance to seawater corrosion. For higher corrosion resistance, we recommend stainless steel disc in SS316 and NBR seal. -
Q: What is the operating temperature range of the EPDM seal?
A: Standard EPDM seal is rated from -20°C to +120°C. For higher temperature applications, Viton or silicone seals are available upon request. -
Q: Does this valve prevent water hammer?
A: Yes, the dual plate design with spring-assisted closure ensures non-slam operation, effectively minimizing water hammer in ballast water pipelines. -
Q: Can I get a different pressure rating than PN1.0MPa?
A: Absolutely. We can manufacture valves with pressure ratings up to PN4.0MPa or Class 150/300. Please consult our sales team for customized specifications. -
Q: Is the valve bidirectional?
A: Standard dual plate check valves are unidirectional. However, we can offer bidirectional sealing versions with special seal design. Please specify your requirement when ordering. -
Q: What certifications do you have?
A: Our factory is ISO9001 certified. Design complies with API 594/API 6D standards. For specific marine certifications (e.g., DNV, ABS), they can be arranged at extra cost and lead time. -
Q: What is the lead time for DN500 valves?
A: Standard lead time is 25-35 days after deposit. Express delivery can be arranged for urgent orders. -
Q: Do you provide installation and maintenance manuals?
A: Yes, each valve is shipped with a user manual and technical documentation. Our engineers are also available for online support.
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