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Home > Industrial Equipment & Components > Valve > Butterfly Valve > Wafer Type Marine Air Check Valve CB/T4303, Cast Iron Construction for Shipboard Use

Wafer Type Marine Air Check Valve CB/T4303, Cast Iron Construction for Shipboard Use

Wafer Type Marine Air Check Valve CB/T4303, Cast Iron Construction for Shipboard Use thumbnail-3

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Wafer Type Marine Air Check Valve CB/T4303, Cast Iron Construction for Shipboard Use photo-5

Product Spotlights

CB/T4303-compliant wafer-type check valve for marine air systems. Features robust cast iron construction for harsh environments and a space-saving design for easy installation between flanges. Ensures reliable backflow prevention, protects equipment, and offers low pressure drop. Customizable pressure ratings and seal options available. From an ISO9001-certified manufacturer with global export experience.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Application:

Other, Shipboard Air Systems

Product Type:

Wafer Type Marine Air Check Valve

Construction Material:

Cast Iron

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Application Other, Shipboard Air Systems

Product Type Wafer Type Marine Air Check Valve

Construction Material Cast Iron

Applicable Standard CB/T4303

Connection Type Wafer (Between Flanges)

Sealing Type Soft Seal (Optional Metal Seal)

Mounting Orientation Horizontal or Vertical

Pressure Rating Customizable upon request

Temperature Range Available upon request

As a professional manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our Wafer Type Marine Air Check Valve, engineered to the stringent CB/T4303 standard. This valve is specifically designed for demanding shipboard applications, offering a reliable and compact solution to prevent the backflow of air in marine piping systems. With our commitment to quality certified by ISO9001 and a proven track record of exporting to global markets, we provide a durable and cost-effective component that enhances the safety and efficiency of your vessel's operations.

Core Features & Technical Advantages:

Robust Cast Iron Construction: The valve body is manufactured from high-grade cast iron, providing excellent strength, corrosion resistance, and longevity in harsh marine environments, including exposure to saltwater atmospheres.
Space-Saving Wafer Design: The wafer-type configuration allows for installation directly between two pipeline flanges, significantly saving space and weight compared to flanged-end check valves—a critical advantage in the confined spaces onboard ships.
Precision Engineered for CB/T4303: This valve is produced in strict compliance with the Chinese shipbuilding standard CB/T4303, ensuring it meets the specific performance, material, and testing requirements for marine applications.
Reliable Non-Return Function: It automatically prevents reverse flow of air, protecting upstream equipment such as compressors, blowers, and system components from potential damage caused by backflow.
Low Pressure Drop: The internal disc and spring mechanism are designed to offer minimal resistance to forward flow, contributing to overall system energy efficiency.
Versatile Installation: Suitable for installation in both horizontal and vertical pipelines, providing flexibility in system design and layout.
Optional Sealing Materials: Standard soft seals (like NBR) are used for general service, with metal-seal options available upon request for higher temperature or more abrasive media.

Technical Specifications & Parameters:

Parameter	Details / Specification
Valve Type	Wafer Type Swing Check Valve
Primary Application	Marine & Shipboard Compressed Air Systems
Body Material	Cast Iron (GG25/GGG40 grades optional)
Disc & Stem Material	Stainless Steel (Standard)
Seat Seal Material	NBR Rubber (Standard), Metal (Optional)
Connection Standard	Designed for ANSI/ASME B16.5 or JIS/GB flanges
Pressure Class	Customizable (Commonly PN10/PN16, Class 150)
Temperature Range	-10°C to +120°C (Standard NBR Seal), Higher ranges available
Flow Direction	Unidirectional, Arrow marked on body

Benefits for Your Operations:

Enhanced System Protection: Safeguards expensive air compressors and sensitive instruments from damage due to backflow, reducing maintenance costs and downtime.
Optimized Space Utilization: The compact wafer design is ideal for retrofit projects or new builds where space is at a premium, allowing for more efficient engine room and system layout.
Reduced Lifetime Cost: The durable cast iron construction and reliable internal components ensure a long service life with minimal need for replacement, offering an excellent return on investment.
Global Compliance & Compatibility: Manufactured to CB/T4303 and compatible with international flange standards, it simplifies procurement for shipyards and marine equipment suppliers serving a worldwide clientele.
Simplified Maintenance: The design allows for in-line inspection and, in many cases, seat replacement without removing the valve body from the pipeline.

Shanghai Zhibang Valve stands behind this product with the credibility of an ISO9001-certified manufacturing process and the experience gained from exporting over US$1 million in valves annually to key maritime regions including North America, Europe, Southeast Asia, and the Middle East. Our strategic location and multiple ports of shipment (Shanghai, Guangzhou, Hong Kong, Beijing) ensure flexible and reliable logistics. Choosing our Wafer Type Marine Air Check Valve means selecting a component built for reliability, backed by a manufacturer dedicated to quality and global customer satisfaction. Contact us today to discuss your specific requirements or to request a detailed quotation.

Frequently Asked Questions (FAQ)

Q: Is this valve suitable for use with other gases besides air?
A: While designed for air systems, it can potentially be used with other compatible, non-aggressive gases (like nitrogen) within its specified pressure and temperature ratings. Please consult our technical team for specific media compatibility.
Q: Can this wafer check valve be installed in any orientation?
A: Yes, it is designed for both horizontal and vertical pipeline installation. For vertical installation, the flow direction must be upward to ensure proper disc closure.
Q: What is the main advantage of a wafer-type design over a flanged check valve?
A: The primary advantages are significant space and weight savings, as well as lower installation cost due to the need for fewer bolts and a simpler mounting procedure between two existing flanges.
Q: Does the CB/T4303 standard have international recognition?
A: CB/T standards are Chinese national standards for shipbuilding. While specific to China, they are widely recognized and accepted in global shipbuilding, especially for vessels built in or for the Asian market, and they often align with core principles of international marine standards.
Q: What pressure classes are typically available?
A: Common pressure ratings include PN10, PN16, and Class 150. However, pressure ratings are customizable based on your system's design pressure. Please provide your requirements for a precise specification.
Q: How do I determine the correct size (DN) for my application?
A: The valve size (DN) should match the nominal bore of your connecting pipeline flanges. Key parameters to provide are the pipeline size, flange standard (e.g., ANSI, JIS), and the required pressure class.
Q: Are spare parts like sealing rings readily available?
A: Yes. As the manufacturer, we maintain an inventory of standard spare parts, including seal kits. We recommend purchasing critical spares with your initial order to ensure quick maintenance turnaround.
Q: What is your typical lead time for production and delivery?
A: Lead time varies based on order quantity, specification, and current production schedule. Standard configurations generally have shorter lead times. We provide reliable lead time estimates upon order confirmation.