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Home > Industrial Equipment & Components > Valve > Butterfly Valve > CB/T4303 Compliant Large Diameter Check Valve, DN500, Wafer Connection, Mill Test Report Provided

CB/T4303 Compliant Large Diameter Check Valve, DN500, Wafer Connection, Mill Test Report Provided

CB/T4303 Compliant Large Diameter Check Valve, DN500, Wafer Connection, Mill Test Report Provided thumbnail-3

CB/T4303 Compliant Large Diameter Check Valve, DN500, Wafer Connection, Mill Test Report Provided thumbnail-4

CB/T4303 Compliant Large Diameter Check Valve, DN500, Wafer Connection, Mill Test Report Provided thumbnail-5

CB/T4303 Compliant Large Diameter Check Valve, DN500, Wafer Connection, Mill Test Report Provided photo-1

CB/T4303 Compliant Large Diameter Check Valve, DN500, Wafer Connection, Mill Test Report Provided photo-2

CB/T4303 Compliant Large Diameter Check Valve, DN500, Wafer Connection, Mill Test Report Provided photo-3

CB/T4303 Compliant Large Diameter Check Valve, DN500, Wafer Connection, Mill Test Report Provided photo-4

CB/T4303 Compliant Large Diameter Check Valve, DN500, Wafer Connection, Mill Test Report Provided photo-5

Product Spotlights

CB/T4303 compliant large diameter (DN500) wafer check valve designed for marine & industrial backflow prevention. Features space-saving wafer connection, robust construction with material traceability via Mill Test Report, and low pressure drop. Offers versatile installation, reliable sealing, and is backed by ISO9001 manufacturing. Ideal for enhancing system safety and reducing maintenance costs in global projects.

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

Key Specifications

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Application:

Other, Marine

Product Standard:

CB/T4303

Nominal Diameter (DN):

500

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
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Application Other, Marine

Product Standard CB/T4303

Nominal Diameter (DN) 500

Connection Type Wafer

Body Material Cast Steel / Ductile Iron

Seat Material Stainless Steel / Rubber

Pressure Rating PN10 / PN16 / PN25

Test Report Mill Test Report Provided

Flow Direction Vertical or Horizontal

Suitable Medium Water, Oil, Gas

As a leading manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in producing high-performance industrial valves for global markets. Our CB/T4303 Compliant Large Diameter Check Valve, DN500, with Wafer Connection, is engineered to deliver superior backflow prevention in demanding marine and industrial applications. We combine rigorous manufacturing processes under our ISO9001 certification with a deep understanding of international standards to offer a reliable solution that ensures system integrity and operational safety. With an annual export value reflecting our global reach, we are committed to providing valves that meet the exacting requirements of projects worldwide.

This large diameter check valve is designed for critical applications where preventing reverse flow is paramount. Its compliance with the CB/T4303 standard, specific to shipbuilding and marine systems, guarantees its suitability for harsh environments. The wafer-style connection offers a space-saving and cost-effective installation compared to flanged types, making it ideal for retrofitting or new system designs where space is constrained.

Key Product Features & Technical Advantages:

Standard Compliance: Manufactured in strict adherence to the CB/T4303 standard, ensuring reliability for marine and related industrial uses.
Robust Construction: The valve body is typically crafted from high-grade cast steel or ductile iron, providing excellent strength and corrosion resistance.
Efficient Wafer Design: The wafer connection is sandwiched between pipeline flanges, reducing overall weight, installation space, and bolt requirements.
Reliable Sealing: Features a resilient seat (often NBR or EPDM rubber) or a metal seat (stainless steel) for tight sealing and long service life against water, oil, or gas media.
Low Pressure Drop: The internal swing or dual-plate design minimizes flow resistance, optimizing system efficiency.
Quick Response: The swing disc or plates close swiftly upon flow reversal, effectively preventing water hammer and protecting upstream equipment.
Versatile Installation: Suitable for installation in both horizontal and vertical pipelines (with upward flow), offering flexibility in system layout.
Quality Assurance: Each valve is accompanied by a Mill Test Report (MTR), providing traceable material chemical and mechanical property data.

Detailed Technical Specifications:

Parameter	Specification
Product Model	Large Diameter Wafer Check Valve
Design Standard	CB/T4303
Nominal Diameter (DN)	500
Connection Type	Wafer
Pressure Rating (PN)	PN10, PN16, PN25 (Customizable)
Body Material	WCB (Cast Carbon Steel), Ductile Iron, etc.
Disc Material	WCB, Stainless Steel (304/316)
Seat Material	NBR, EPDM, Metal (Stainless Steel)
Suitable Medium	Water, Sea Water, Oil, Gas
Temperature Range	-20°C to +120°C (varies with seat material)
Face-to-Face Dimension	As per CB/T4303 or customer request
Testing Standard	Shell Test, Seat Test per applicable standards

Benefits for Your Project:

Enhanced System Safety: Prevents backflow effectively, protecting pumps and other critical equipment from damage.
Reduced Maintenance: Durable construction and reliable sealing minimize downtime and repair costs.
Cost-Effective Installation: The wafer design lowers installation time, labor, and material costs (fewer bolts, no spool pieces).
Documented Quality: The provided Mill Test Report offers transparency and assurance for quality-critical projects, simplifying procurement audits.
Global Acceptance: Compliance with CB/T4303 and our ISO9001 system ensures the product meets rigorous international buyer expectations.

Shanghai Zhibang Valve backs its products with a proven track record, serving diverse markets from North America and Europe to Southeast Asia and Africa. Our annual export volume of US$1-1.5 million is a testament to the trust placed in our quality and reliability. Sourcing from multiple major ports like Shanghai and Guangzhou ensures flexible and efficient logistics. When you choose this DN500 wafer check valve, you are not just purchasing a component; you are investing in a solution backed by documented manufacturing excellence, global supply chain capability, and a commitment to supporting your project's success. Contact us today for a detailed quotation or to discuss your specific requirements.

Frequently Asked Questions (FAQ)

What does CB/T4303 compliance mean for this valve?
CB/T4303 is a Chinese national standard specifically for shipbuilding—marine valves. Compliance indicates the valve is designed, manufactured, and tested to meet the performance and material requirements suitable for marine applications, including resistance to corrosion and operational reliability in such environments.
Can this wafer check valve be installed in a vertical pipeline?
Yes, it typically can be installed in vertical lines, provided the flow direction is upward. It is crucial to confirm the specific design with the manufacturer, as some models are optimized for horizontal installation only.
What is included in the Mill Test Report (MTR)?
The MTR is a certificate from the material mill. It provides detailed information about the chemical composition, mechanical properties (like tensile strength, yield strength), and heat treatment of the raw materials used for the valve's pressure-retaining parts, ensuring traceability and quality verification.
Is the valve suitable for seawater applications?
Yes, with appropriate material selection. For example, specifying a valve body in WCB cast steel with suitable coatings or using stainless steel (316) for internal components can make it suitable for seawater. The exact material grade should be confirmed based on your specific service conditions.
What are the pressure ratings available for the DN500 size?
Common pressure ratings include PN10, PN16, and PN25. The specific available rating depends on the design and material. We can provide valves across this range, and other ratings may be available upon request.
How does the wafer connection compare to a flanged connection?
A wafer valve is installed between two pipeline flanges using long bolts. It is lighter, more compact, requires fewer bolts, and is generally more economical than a flanged valve, which has its own integral flanges. It is ideal where space and weight are considerations.
What is the typical delivery lead time for this product?
Lead times vary based on order quantity, specific material requirements, and production schedule. Standard configurations may have shorter lead times. Please contact us with your project timeline for an accurate delivery estimate.
Do you offer customization for different end connections or materials?
Yes, as a manufacturer, we offer customization options. This can include different face-to-face dimensions, special coatings, alternative materials for body, disc, and seat, or testing to additional standards. Please provide your detailed specifications for a tailored solution.