ALL CATEGORIES

Seller Center
- Product Management
  
  Post Product
  
  Manage Products
  
  Featured Products
- Blog Management
  
  Post Blog Article
  
  Manage Blog Articles
  
  Manage Blog Categories
- Inquiry Management
  
  My Inquiries
  
  Buying Requests
- Analytics Center
  
  Performance Dashboard
  
  Product Analytics
  
  Visitor Analytics
Connect Your Store to WeChat

Follow Our Official Service Account
Manage Products & Inquiries Anywhere
Seller Services

Seller Services

Goldsupplier.com: 20 years of Global Trade Expertise, Empowering Your Business to Go Global!

Join GoldSupplier.com

Free & Instant Registration

Showcase Company & Products

Access Global Buying Requests

Register Now

Activate Verified Supplier Membership

Priority Verified Visibility

Claim Exclusive Buying Requests

Automated Multi-language Store

Verified Now

Launch Your EasyOcean Website

Full-Service Website Management

Google Page 1 Guarantee

Enhanced Brand Credibility

Launch Now
Buyer Services
Post Buying Request

Browse Product Categories

Featured Suppliers
Contact Platform Support

Help Center

Home > Industrial Equipment & Components > Valve > Butterfly Valve > CB/T4303 Marine Butterfly Check Valve, Wafer Type, Dual Plate Design, PN16 Pressure Rating, Mill Test Report Provided

CB/T4303 Marine Butterfly Check Valve, Wafer Type, Dual Plate Design, PN16 Pressure Rating, Mill Test Report Provided

CB/T4303 Marine Butterfly Check Valve, Wafer Type, Dual Plate Design, PN16 Pressure Rating, Mill Test Report Provided thumbnail-3

CB/T4303 Marine Butterfly Check Valve, Wafer Type, Dual Plate Design, PN16 Pressure Rating, Mill Test Report Provided thumbnail-4

CB/T4303 Marine Butterfly Check Valve, Wafer Type, Dual Plate Design, PN16 Pressure Rating, Mill Test Report Provided thumbnail-5

CB/T4303 Marine Butterfly Check Valve, Wafer Type, Dual Plate Design, PN16 Pressure Rating, Mill Test Report Provided photo-1

CB/T4303 Marine Butterfly Check Valve, Wafer Type, Dual Plate Design, PN16 Pressure Rating, Mill Test Report Provided photo-2

CB/T4303 Marine Butterfly Check Valve, Wafer Type, Dual Plate Design, PN16 Pressure Rating, Mill Test Report Provided photo-3

CB/T4303 Marine Butterfly Check Valve, Wafer Type, Dual Plate Design, PN16 Pressure Rating, Mill Test Report Provided photo-4

CB/T4303 Marine Butterfly Check Valve, Wafer Type, Dual Plate Design, PN16 Pressure Rating, Mill Test Report Provided photo-5

Product Spotlights

ISO9001-certified marine-grade dual-plate check valve in compact wafer design. Features PN16 pressure rating, rapid closure to prevent water hammer, and includes Mill Test Report for quality assurance. Ideal for space-saving, reliable backflow prevention in global marine and industrial applications.

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

Key Specifications

Get Latest Price

Application:

Other, Marine and Industrial Piping Systems

Type:

Wafer Type, Dual Plate Design

Pressure Rating:

PN16

Contact Supplier Request Quote Chat Now

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
Company Profile
Contact Us

Application Other, Marine and Industrial Piping Systems

Type Wafer Type, Dual Plate Design

Pressure Rating PN16

Body Material Cast Iron, Ductile Iron, Stainless Steel

Disc Material Stainless Steel

Seat Material EPDM, NBR, Viton

Connection Standard ISO 5211 Flange Compatible

Certification ISO9001 Quality Management System

Testing Report Mill Test Report Provided

Operation Automatic, Bidirectional Flow

As a professional manufacturer with a strong commitment to quality and reliability, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our CB/T4303 Marine Butterfly Check Valve. Engineered specifically for demanding marine applications and industrial systems, this valve is designed to provide dependable backflow prevention, ensuring the safety and integrity of your piping networks. With our ISO9001-certified production processes and a focus on precision engineering, we deliver a product that combines robust performance with ease of installation and maintenance, making it a trusted choice for clients across the globe.

Our Wafer Type, Dual Plate Design check valve offers superior functionality in a compact form factor. The dual plate mechanism ensures quick and positive closure upon flow reversal, minimizing water hammer and protecting downstream equipment. The wafer-style design allows for simple installation between standard pipe flanges, significantly reducing space requirements and overall weight compared to traditional swing check valves—a critical advantage in space-constrained marine environments.

Key Features & Technical Advantages:

Dual Plate Design: Features two semi-circular plates hinged on a central shaft. This design ensures rapid closure with minimal pressure drop during forward flow and provides excellent sealing against backflow.
PN16 Pressure Rating: Rated for a nominal pressure of 16 bar, making it suitable for a wide range of marine and industrial hydraulic and process applications.
Compact Wafer Construction: The valve installs directly between two flanges using through-bolts, eliminating the need for extra gaskets or a separate valve body connection. This simplifies installation and reduces maintenance points.
Versatile Material Options: The valve body is typically available in cast iron, ductile iron, or stainless steel to suit different fluid compatibilities and corrosion resistance requirements. Discs are commonly stainless steel, and seats are available in EPDM, NBR, or Viton for various media (water, oil, chemicals, seawater).
Bidirectional Sealing (Optional): Depending on the seat design, some models can provide effective sealing in both flow directions, offering flexibility in system design.
Low Torque Operation: The balanced design of the dual plates requires minimal force to open, reducing the load on the pumping system and improving energy efficiency.
Mill Test Report (MTR): Each valve is supplied with a comprehensive Mill Test Report, providing traceable documentation for material chemical composition, mechanical properties, and pressure tests, ensuring compliance with specified standards and giving you full confidence in the product's quality.

Detailed Technical Specifications:

Parameter	Specification
Design Standard	CB/T4303 (Chinese Ship Standard)
Type	Wafer, Dual Plate, Butterfly Check Valve
Nominal Pressure	PN16
Nominal Diameter (Typical Range)	DN50 to DN600 (2" to 24")
Body Material	Cast Iron (GG25), Ductile Iron (GGG40), Stainless Steel (CF8/CF8M)
Disc Material	Stainless Steel (304/316)
Seat Material	EPDM (Standard), NBR, Viton (Available upon request)
Flange Connection	ISO 5211, PN16 Flange Dimensions
Temperature Range	-10°C to +120°C (depending on seat material)
Flow Direction	Horizontal or Vertical (Recommended orientation specified)
Leakage Rate	Class A (Zero Leakage) or Class B (Low Leakage) per applicable standards

Benefits for Your Operations:

Enhanced System Safety: Prevents backflow effectively, protecting pumps and other sensitive equipment from damage due to reverse flow.
Space and Weight Savings: The wafer design is ideal for marine applications where every kilogram and cubic centimeter counts, allowing for more efficient ship design.
Reduced Maintenance Costs: Simple design with fewer moving parts translates to lower lifetime maintenance requirements and costs.
Improved Flow Efficiency: The streamlined internal passage and dual-plate design minimize pressure loss when the valve is fully open, saving energy.
Global Compliance: Manufactured according to CB/T4303 ship standards and supported by ISO9001 quality management, ensuring reliability for international projects.

Frequently Asked Questions (FAQ):

Q: What is the main advantage of a dual-plate check valve over a single-disc swing check valve?
A: The dual-plate design offers a more compact profile, faster closure speed (reducing water hammer risk), and typically has a lower pressure drop in the fully open position compared to traditional swing check valves.
Q: Is this valve suitable for seawater applications?
A: Yes, when ordered with appropriate materials such as stainless steel (316) body and discs along with a compatible seat material like EPDM or Viton, this valve is well-suited for seawater service. Specific material selection should be confirmed based on your exact fluid conditions.
Q: Can this wafer-type valve be installed in any orientation?
A: While it can function in various orientations, horizontal installation with the shaft in a horizontal position is generally recommended for optimal performance and longest service life. Vertical installation is possible but may require specific consideration for spring-assisted models to ensure proper closure.
Q: What does PN16 pressure rating mean?
A: PN16 indicates a nominal pressure rating of 16 bar at ambient temperature (typically 20°C). This is the maximum continuous pressure the valve is designed to withstand. The pressure rating may vary with temperature; please consult the detailed performance charts.
Q: What is included in the Mill Test Report (MTR)?
A: The MTR provides certified test results from the material manufacturer, including chemical analysis, mechanical properties (tensile strength, yield strength, elongation), and often results of non-destructive tests. It serves as a material traceability and quality assurance document.
Q: Are the flanges included with the valve?
A: No, the wafer-type valve is designed to be installed between two existing pipeline flanges. The valve itself has integral flange faces that mate with the pipeline flanges, which are connected using through-bolts. The pipeline flanges are not supplied with the valve.
Q: Do you offer customization for different sizes or materials?
A: Yes, as a manufacturer, we can provide valves in a range of nominal diameters from DN50 to DN600 and in various body and seat material combinations to meet specific project requirements. Customization options are available upon request.
Q: What is the typical lead time for orders?
A: Lead times depend on order quantity, specification, and current production schedule. Standard configurations often have shorter lead times. Please contact our sales team with your specific requirements for an accurate delivery estimate.

Backed by Shanghai Zhibang Valve's ISO9001-certified manufacturing system and nearly a decade of industry experience since our establishment in 2016, we guarantee the quality and performance of every CB/T4303 Marine Butterfly Check Valve. Our products have gained the trust of clients worldwide, with an annual export value ranging between US$1 Million and US$1.5 Million, serving diverse markets across North and South America, Europe, Asia, Africa, and Oceania. We support flexible shipment from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing. Choose our valve for a reliable, space-saving, and efficient solution for your marine and industrial backflow prevention needs. Contact us today for a detailed quotation or technical consultation.

Product Tags: Marine Butterfly Check Valve , Wafer Type Check Valve , Dual Plate Check Valve