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Help CenterZhibang Valve PN1.6-4.0MPa Marine Dual Plate Check Valve Flanged Cast Steel Stainless Steel Disc
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Shanghai Zhibang Valve Manufacture Co., Ltd, a professional manufacturer established in 2016 with ISO9001 certification, proudly offers the Zhibang Valve PN1.6-4.0MPa Marine Dual Plate Check Valve – a reliable solution for marine and industrial applications requiring non-return flow control. Our annual export value of US$1-1.5 million and global reach to markets including North America, Europe, Southeast Asia, and Africa reflect the trust customers place in our products. This dual plate check valve combines a robust cast steel body with a durable stainless steel disc, delivering exceptional performance under pressures from 1.6 to 4.0 MPa. Engineered for flanged connections, it minimizes pressure loss and prevents backflow in critical systems.
The Marine Dual Plate Check Valve is designed with advanced features to meet the rigorous demands of marine piping, water treatment, oil & gas, and industrial processes. Its dual-plate mechanism ensures quick closure, reducing water hammer and protecting downstream equipment. Key advantages include:
- Compact & Lightweight Design – Compared to traditional swing check valves, the dual plate design saves up to 60% space and weight, simplifying installation and support structure requirements.
- Flanged Connections – Available in standard flanges (ANSI, DIN, JIS, etc.) for easy integration into existing piping systems.
- Stainless Steel Disc – The disc is made of high-grade stainless steel for excellent corrosion resistance in seawater and chemical environments.
- Pressure Rating PN1.6-4.0MPa – Suitable for medium to high pressure applications, with testing up to 1.5 times the rated pressure.
- Low Pressure Drop – The streamlined flow path and dual plates minimize resistance, reducing energy consumption in pumping systems.
- Temperature Range – Operates effectively from -29°C to +300°C (depending on material selection).
- Reliable Sealing – Elastic seal or metal-to-metal sealing options against backflow, with zero leakage performance.
- Versatile Materials – Body in cast steel (WCB, LCB, or alloy steels); disc in stainless steel (304, 316, 316L); optional coatings for additional protection.
| Parameter | Specification |
| Nominal Diameter (DN) | 50 – 600 mm (custom sizes available) |
| Pressure Rating | PN1.6, PN2.5, PN4.0 MPa |
| Body Material | Cast Steel (WCB), Stainless Steel (CF8, CF8M) – optional |
| Disc Material | Stainless Steel (304, 316, 316L) |
| Flange Standard | ANSI B16.5, DIN 2533, JIS B2238 (or as requested) |
| Application | Marine, Offshore, Water Supply, Fire Fighting, HVAC, Oil & Gas |
| Certification | ISO9001:2015 |
Why choose Zhibang Valve for your marine check valve needs? Our factory in Shanghai, China, operates with strict quality control under ISO9001 certification. With an annual export value exceeding US$1 million and shipments to ports including Shanghai, Guangzhou, Hong Kong, and Beijing, we have established a strong global supply chain. The dual plate check valve is extensively tested for strength, sealing, and durability, ensuring a service life of over 10 years in normal conditions. We offer customizable options – materials, flange drilling, and coatings – to match specific project requirements. Technical support and after-sales service are available from our experienced team. Contact us today for a competitive quotation and fast delivery to your port.
Frequently Asked Questions
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What is the operating pressure range of this valve?
The Zhibang Marine Dual Plate Check Valve is rated for PN1.6 to 4.0 MPa (approximately 232 to 580 psi). It is hydrostatically tested at 1.5 times the rated pressure before delivery. -
Can it be used in seawater applications?
Yes. The stainless steel disc and optional body materials (CF8M or with epoxy coating) provide excellent corrosion resistance against seawater. Please specify your medium when ordering. -
What flange standards are available?
We can supply flanges according to ANSI B16.5, DIN, JIS, GB, and other standards. Custom drilling patterns are also available upon request. -
How does the dual plate design reduce water hammer?
Dual plates close rapidly upon flow reversal, minimizing the reverse flow velocity and thus reducing the pressure surge (water hammer) compared to conventional swing check valves. -
What is the temperature limit?
The standard design handles temperatures from -29°C to +300°C. For extreme temperatures (cryogenic or high-temperature), special materials and designs are available – please consult our technical team. -
Is this valve suitable for gas applications?
Yes, it can be used for both liquid and gas service. For gases, ensure the valve is installed horizontally to guarantee proper disc operation. Vertical installation with upward flow is also acceptable. -
What warranty do you offer?
We provide a standard 12-month warranty from shipment date, covering manufacturing defects. Extended warranty is negotiable for large projects. -
Can I get a sample or small order for testing?
Certainly. We support sample orders and can produce small batches for qualification. Please contact our sales team with your requirements.
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