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Help CenterWCB Cast Steel Marine Check Valve Customized Non-Standard Class150 2"-12" Threaded Connection
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Shanghai Zhibang Valve Manufacture Co., Ltd. has been a trusted manufacturer of industrial valves since 2016, exporting annually over US$1 Million to global markets including North America, South America, Europe, Africa, and Oceania. Our WCB Cast Steel Marine Check Valve is designed specifically for demanding marine environments where reliability and corrosion resistance are critical. As a customized non-standard solution, we offer Class150 threaded connections in sizes from 2" to 12", providing flexibility for unique piping systems while maintaining the robust performance that only cast steel can deliver.
This check valve is engineered to prevent backflow in seawater, freshwater, and other industrial fluid systems onboard ships, offshore platforms, and coastal facilities. The valve body is made from WCB (Weldable Cast Carbon Steel) per ASTM A216, offering excellent strength and weldability under moderate pressure and temperature conditions. The threaded connection simplifies installation and reduces the need for flanges, making it ideal for space-constrained marine applications.
Key Features & Technical Specifications
- Durable WCB Cast Steel Body – Withstands harsh marine environments, resists corrosion, and maintains structural integrity under pressure.
- Threaded End Connections – NPT or BSPT threads available; easy to install and maintain without special tools.
- Class150 Pressure Rating – Suitable for low to moderate pressure applications typical in marine systems (up to 285 psi at ambient temperature).
- Wide Size Range 2"–12" – Accommodates various pipeline diameters; customizable non-standard sizes upon request.
- Non-Standard Customization – We can modify dimensions, face-to-face length, disc material, seat design, and coatings to meet specific project requirements.
- Marine-Grade Internal Components – Disc and seat available in stainless steel, bronze, or other alloys for enhanced corrosion resistance.
- Low Pressure Drop – Streamlined flow path minimizes resistance and ensures efficient operation.
- Reliable Sealing – Metal-to-metal or soft seat options provide drip-tight shutoff and long service life.
| Material | Body: WCB (ASTM A216), Trim: 13Cr / SS304 / SS316 / Bronze (optional) |
| Pressure Rating | Class150 (PN20) |
| Connection Type | Threaded (NPT / BSPT) |
| Size Range | 2" – 12" (custom sizes available) |
| Design Standard | API 6D, BS 1868, or customized |
| Test Pressure | Shell: 450 psi, Seat: 315 psi (hydrostatic) |
| Operating Temperature | -29°C ~ 425°C (-20°F ~ 800°F) |
| Application | Marine ballast systems, cooling water, fire fighting, bilge, cargo handling |
Advantages for Your Business
By choosing our customized WCB cast steel marine check valve, you benefit from:
- Tailored Solutions – We produce non-standard dimensions, thread types, and internal materials to exactly match your piping design. No need to compromise on standard products.
- Cost-Effective Manufacturing – Direct from our ISO9001-certified factory in Shanghai, you save on intermediate costs while ensuring consistent quality.
- Fast Lead Times – Typical production takes 15–30 working days for standard sizes; custom orders may require 25–40 days, depending on complexity.
- Global Logistics Support – Shipments from Shanghai, Guangzhou, Hong Kong, or Beijing ports ensure flexible delivery options worldwide.
- Dedicated Technical Support – Our engineers can assist with material selection, pressure calculations, and valve sizing to optimize system performance.
We understand that marine environments demand exceptional reliability. That is why every valve undergoes rigorous hydrostatic and seat leak testing before leaving our facility. Our ISO9001:2015 quality management system ensures traceability and consistent production standards.
Trust Shanghai Zhibang Valve – With annual exports exceeding US$1 Million and a presence across all major continents, we have built a reputation for delivering robust, made-to-order valves that keep marine operations running smoothly. Contact us today to discuss your specific requirements and receive a competitive quotation. Our team is ready to provide a customized solution that fits your budget and schedule.
Frequently Asked Questions (FAQ)
-
Q: What is the material of the valve body?
A: The body is made of WCB cast steel per ASTM A216. For corrosive environments, we can also supply LCB (low temperature) or stainless steel bodies upon request. -
Q: Are these valves suitable for seawater?
A: Yes, with appropriate trim materials such as SS316 or bronze, the valve can handle seawater, brackish water, and other saline fluids. We recommend specifying the medium when ordering to ensure correct material selection. -
Q: Can I get a non-standard size or face-to-face dimension?
A: Absolutely. Our product is designed as “customized non-standard.” We can produce any face-to-face length, thread type, or special end preparation according to your drawings or specifications. -
Q: What is the maximum working pressure for Class150 threaded check valve?
A: Class150 corresponds to a maximum allowable working pressure of 285 psi at 100°F (38°C). Pressure ratings decrease at higher temperatures – please consult our technical sheet for the exact values. -
Q: How does the threaded connection differ from flanged?
A: Threaded connections are compact, require no gaskets or bolts, and install quickly. They are ideal for small-bore pipes and applications where space is limited. For larger sizes (above 12"), flanged connections are more common. -
Q: What quality certifications do you have?
A: Our company is ISO9001:2015 certified. We also offer material certificates, pressure test reports, and other documentation as requested. -
Q: What is the typical lead time?
A: For standard sizes 2"–12", delivery is usually 15–30 working days. Customized non-standard valves may take 25–40 working days. Rush orders can be arranged with prior agreement. -
Q: Do you provide samples or small orders?
A: Yes, we welcome sample orders to evaluate quality. MOQ depends on size and customization level; please contact our sales team for details.
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