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 > Check Valve > CBT4303 Ship Flanged Butterfly Non-return Valve, PN16 Pressure Rating

CBT4303 Ship Flanged Butterfly Non-return Valve, PN16 Pressure Rating

CBT4303 Ship Flanged Butterfly Non-return Valve, PN16 Pressure Rating thumbnail-3

CBT4303 Ship Flanged Butterfly Non-return Valve, PN16 Pressure Rating thumbnail-4

CBT4303 Ship Flanged Butterfly Non-return Valve, PN16 Pressure Rating thumbnail-5

CBT4303 Ship Flanged Butterfly Non-return Valve, PN16 Pressure Rating photo-1

CBT4303 Ship Flanged Butterfly Non-return Valve, PN16 Pressure Rating photo-2

CBT4303 Ship Flanged Butterfly Non-return Valve, PN16 Pressure Rating photo-3

CBT4303 Ship Flanged Butterfly Non-return Valve, PN16 Pressure Rating photo-4

CBT4303 Ship Flanged Butterfly Non-return Valve, PN16 Pressure Rating photo-5

Product Spotlights

Marine-grade PN16 flanged butterfly check valve for automatic backflow prevention. Features corrosion-resistant construction (cast iron/stainless steel), low flow resistance, and maintenance-friendly design. Ideal for shipboard seawater, ballast, and cooling systems. ISO 9001 manufactured, ensuring reliable performance and global project compliance.

Negotiable MOQ: 10 Units (Price negotiable depending on order volume and customization)

Key Specifications

Get Latest Price

Application:

Other, Marine & Shipbuilding

Valve Type:

Butterfly Non-Return (Check) Valve

Pressure Rating:

PN16

Contact Supplier Request Quote Chat Now

Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

shanghai

Delivery Detail:

7 days

Product Details
Company Profile
Contact Us

Application Other, Marine & Shipbuilding

Valve Type Butterfly Non-Return (Check) Valve

Pressure Rating PN16

Connection Type Flanged (Wafer/Lug style)

Body Material Cast Iron/Ductile Iron (Standard)

Disc Material Stainless Steel (Standard)

Seat Material EPDM/NBR (Standard)

Operation Automatic (Flow-dependent)

Size Range DN50 to DN600 (2“ to 24“)

Standards ISO 9001 Quality Management

As a leading manufacturer with ISO 9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present the CBT4303 Ship Flanged Butterfly Non-return Valve. Engineered specifically for demanding marine applications, this valve ensures reliable one-way flow control, preventing backflow and protecting critical shipboard systems. With a robust PN16 pressure rating and a flanged design for secure installation, the CBT4303 is a trusted component for shipbuilders and marine engineers worldwide, combining durability with maintenance-friendly operation.

The CBT4303 valve is designed to offer superior performance and longevity in seawater, ballast, cooling, and fire-fighting lines. Its automatic operation eliminates the need for external power, making it a simple yet vital safeguard for your vessel's piping integrity.

Core Product Features & Technical Advantages:

Marine-Grade Construction: Manufactured from corrosion-resistant materials suitable for shipboard environments. The standard configuration features a cast iron body with a stainless steel disc, providing excellent resistance to seawater and atmospheric corrosion.
Automatic, Fail-Safe Operation: Functions as a true non-return valve. The disc opens with forward flow and closes automatically by gravity and reverse flow pressure, ensuring immediate sealing to prevent backflow and water hammer.
Flanged Connection for Security: The wafer or lug-style flanged design allows for easy installation between pipeline flanges using through-bolts, creating a rigid and leak-proof connection that withstands vessel vibration and movement.
Low Flow Resistance: The butterfly-style disc design offers a streamlined flow path when open, minimizing pressure drop across the valve and contributing to overall system efficiency.
Maintenance-Friendly Design: Many models feature a compact, lightweight body. Seat replacement can often be performed without removing the valve body from the pipeline, significantly reducing downtime and maintenance costs.
Versatile Sealing Options: Standard seats are made from EPDM or NBR, suitable for a wide range of temperatures and media including fresh water, seawater, and air. Alternative elastomers are available for specific chemical or temperature requirements.

Technical Specifications & Configurations:

The table below outlines key specifications for the standard CBT4303 series. Customizations are available upon request to meet specific project needs.

Parameter	Specification
Design Standard	API 609, BS EN 593
Pressure Rating	PN16 (16 bar)
Test Pressure	Shell: 24 bar, Seat: 17.6 bar
Temperature Range (with EPDM seat)	-10°C to +120°C
End Connection	Flanged (PN16/ANSI 150# drilling pattern)
Flow Direction	Horizontal or Vertical (flow bottom to top)
Optional Features	External lever & spring kit, position indicator, locking device

Benefits for Your Project:

Enhanced System Safety: Protects pumps, compressors, and other equipment from damage caused by reverse flow, contributing to safer vessel operation.
Reduced Operational Costs: The reliable automatic operation requires no manual intervention or external power, lowering energy consumption and labor costs.
Long Service Life: The use of durable materials and corrosion-resistant coatings ensures extended service intervals and a lower total cost of ownership.
Global Compliance: Manufactured under an ISO 9001 quality management system, ensuring consistent quality and traceability, which is crucial for international marine projects.

Trust in the reliability and global reach of Shanghai Zhibang Valve. Since our establishment in 2016, we have grown into a trusted exporter, shipping over US$1 million in quality valves annually to key markets across North America, South America, Europe, Asia, Africa, and Oceania. Our valves are shipped from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring timely delivery to your project site. The CBT4303 Flanged Butterfly Non-return Valve embodies our commitment to manufacturing robust, application-specific solutions. For detailed quotations, technical drawings, or to discuss custom requirements for your marine or industrial application, contact our engineering team today.

Frequently Asked Questions (FAQ):

Q: Can this valve be installed in any orientation?
A: For optimal performance and sealing, it is recommended to install the valve in a horizontal pipeline. For vertical installation, the flow must be directed from bottom to top to allow gravity to assist in disc closure.
Q: What is the difference between a wafer and a lug-style flanged butterfly valve?
A: A wafer-style valve is sandwiched between two pipeline flanges and uses longer bolts. A lug-style valve has threaded inserts (lugs) on the valve body, allowing it to be bolted directly to each flange, which can be beneficial for end-of-line applications or easier maintenance.
Q: Is the valve suitable for saltwater (seawater) service?
A: Yes, the standard materials (cast iron body, stainless steel disc) offer good corrosion resistance for seawater. For highly aggressive or extended immersion service, discussing material upgrades like full stainless steel construction is advisable.
Q: How do I determine the correct valve size for my pipeline?
A: The valve size (DN) should match the nominal diameter of your pipeline flanges. It is also important to consider flow rate and pressure drop; our technical team can assist with sizing based on your system parameters.
Q: Does the valve require regular maintenance?
A: These valves are designed for low maintenance. Periodic visual inspection for external corrosion and checking for proper operation during system tests is recommended. The seat, being a wear part, may need replacement after extended service.
Q: Are certifications or test reports available with the valve?
A: As an ISO 9001 certified manufacturer, we can provide standard material certificates and factory test reports (e.g., shell and seat pressure tests) upon request. Specific marine society approvals (e.g., ABS, DNV) can be discussed for custom orders.
Q: What is the lead time for standard sizes?
A: Lead times vary based on size and quantity. Standard sizes (DN50-DN300) often have shorter lead times or may be available from stock. Please inquire for a specific delivery schedule.
Q: Can the valve be customized for different pressures or temperatures?
A: Absolutely. While PN16 is standard, we can engineer valves for other pressure classes (PN10, PN25, ANSI 150#, etc.) and offer a range of seat materials (Viton, PTFE) for higher temperature or chemical service.