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CB/T4303 Counterweight Check Valve for Marine Use, Standard Compliant, Technical Support Available
Product Spotlights
Marine-grade CB/T4303 compliant counterweight check valve designed for reliable unidirectional flow control in shipboard systems. Features a robust counterweight mechanism for positive sealing, durable cast steel/ductile iron construction resistant to seawater corrosion, and is available in sizes DN50-DN600 with flanged connections. Offers enhanced safety by preventing backflow to protect critical equipment, requires low maintenance, and is backed by manufacturer technical support and ISO9001 quality management.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Standard:
CB/T4303
Application:
Other, Marine and shipbuilding systems
Valve Type:
Counterweight Check Valve
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Standard
CB/T4303
Application
Other, Marine and shipbuilding systems
Valve Type
Counterweight Check Valve
Connection Type
Flanged (common), optional others
Body Material
Cast Steel, Ductile Iron
Seat Material
Rubber, Metal
Pressure Rating
PN10-PN25, Class150-Class300
Size Range
DN50-DN600
Technical Support
Available from manufacturer
Certification
ISO9001 Quality Management System
As a professional manufacturer with a strong foundation in the valve industry since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our CB/T4303 Counterweight Check Valve for Marine Use. Engineered specifically for the demanding conditions of maritime applications, this valve is a critical component for ensuring the safety, reliability, and efficiency of shipboard piping systems. We combine rigorous manufacturing standards under our ISO9001 certification with dedicated technical support to deliver a product that meets the exacting requirements of global shipbuilders and marine engineers.
Our marine-grade counterweight check valve is designed to prevent reverse flow in pipelines, protecting pumps and other equipment from damage. The unique counterweight mechanism ensures positive sealing and reliable operation under varying flow conditions and system pressures common in marine environments.
Key Features and Technical Advantages:
- Robust Construction for Harsh Environments: Manufactured from high-grade materials such as cast steel or ductile iron, the valve body is built to withstand corrosive seawater, high humidity, and mechanical stresses encountered at sea.
- Reliable Counterweight Mechanism: The internal counterweight provides a consistent closing force, ensuring the disc seals promptly and securely when flow stops or reverses, minimizing water hammer and backflow risks.
- Compliance with Marine Standards: The valve is designed and manufactured in strict compliance with the CB/T4303 standard, a recognized specification for shipbuilding valves in China, ensuring compatibility and reliability in marine systems.
- Low Maintenance Design: Simple internal structure with minimal moving parts reduces the need for frequent maintenance, a crucial factor for vessels on long voyages.
- Versatile Installation: Suitable for horizontal or vertical installation (flow direction must be upward in vertical lines), providing flexibility in system design and space-constrained engine rooms.
Technical Specifications:
| Parameter | Specification / Range |
|---|---|
| Design Standard | CB/T4303 |
| Nominal Pressure (PN) | PN10, PN16, PN25 |
| Pressure Class (ASME) | Class150, Class300 |
| Nominal Diameter (DN) | DN50 to DN600 |
| Body Material | Cast Steel (WCB), Ductile Iron |
| Disc / Seat Material | Rubber Seated or Metal Seated options |
| Connection Type | Flanged (RF, FF), other ends available upon request |
| Flow Direction | Unidirectional, marked on valve body |
| Applicable Medium | Sea Water, Fresh Water, Oil, Air |
| Operating Temperature | -20°C to +120°C (varies with seat material) |
Benefits for Your Marine Projects:
- Enhanced System Safety: Prevents catastrophic backflow, protecting vital machinery like pumps, condensers, and firefighting systems.
- Operational Reliability: The counterweight design offers consistent performance without reliance on external power sources, crucial for fail-safe marine operations.
- Reduced Lifetime Cost: Durable construction and low maintenance requirements lead to lower total cost of ownership over the valve's service life.
- Global Compliance: Adherence to CB/T4303 facilitates its use in international shipbuilding and repair projects, especially those following similar technical frameworks.
- Expert Support: Our technical team provides support from selection and installation guidance to after-sales service, ensuring optimal valve performance.
With an annual export value ranging between US$1 Million and US$1.5 Million, Shanghai Zhibang has established a strong presence in key global markets including North America, Europe, Southeast Asia, and Africa. Our products are shipped from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring efficient logistics for our international clients. Backed by our ISO9001 quality management system, every CB/T4303 Counterweight Check Valve undergoes stringent testing to guarantee it meets performance specifications. We invite shipyards, marine equipment suppliers, and vessel operators to experience the reliability of our valves. Contact us today for detailed quotations, technical data sheets, and to discuss how our valves can be integrated into your next marine project.
Frequently Asked Questions (FAQ)
-
Q: What is the primary function of this counterweight check valve in a marine system?
A: Its primary function is to allow fluid flow in one direction only and automatically close to prevent reverse flow (backflow) when the flow stops or reverses. This protects upstream equipment like pumps from damage and maintains system integrity. -
Q: How does the counterweight mechanism differ from a standard swing check valve?
A: A standard swing check valve relies on flow pressure and gravity to close. The counterweight adds an external closing force, enabling faster and more positive sealing, which is particularly beneficial in systems with pulsating flow or where rapid closure is needed to prevent water hammer. -
Q: Can this valve be installed in any orientation?
A: It is designed for horizontal pipeline installation. For vertical installation, it can only be used in upward flow applications. The valve body is clearly marked with the flow direction arrow for correct installation. -
Q: What materials are available for the valve body to handle seawater corrosion?
A> Common materials include cast steel (WCB) with appropriate coatings or linings, and ductile iron with corrosion-resistant treatments. The specific material recommendation depends on the water chemistry and service conditions. -
Q: Does compliance with CB/T4303 mean it's accepted for international shipbuilding projects?
A: CB/T4303 is a widely recognized Chinese standard for shipbuilding. Many international shipyards and classification societies accept valves manufactured to this standard, especially when supplemented by specific material certifications and test reports. It's advisable to confirm with your project's specific requirements. -
Q: What kind of technical support do you provide?
A: Our support includes assistance with valve selection based on your system parameters, installation guidance, troubleshooting, and after-sales service. We can provide CAD drawings, performance curves, and operation manuals. -
Q: Are customization options available for size, pressure rating, or connection type?
A: Yes, we offer customization within certain parameters. While DN50-DN600 and standard pressure ratings are common, we can discuss modifications to dimensions, flange standards (ANSI, JIS, DIN), or special coatings upon request for larger quantity orders. -
Q: What is the typical lead time for orders?
A: Lead time varies based on order quantity, specifications, and current production schedule. Standard configurations typically have shorter lead times. We provide estimated delivery schedules upon receipt of your detailed inquiry.
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1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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