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Home > Industrial Equipment & Components > Valve > Butterfly Valve > CB/T3191 Marine Ball Valve With Mill Test Report, For Compressed Air Pipelines, Threaded Ends

CB/T3191 Marine Ball Valve With Mill Test Report, For Compressed Air Pipelines, Threaded Ends

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Product Spotlights

CB/T3191 standard marine ball valve for compressed air. Features threaded ends for easy installation, robust construction for harsh environments, and includes a Mill Test Report for quality assurance. Offers reliable sealing, low pressure drop, and is available in various materials and pressure ratings. Ideal for marine and industrial air systems.

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

Key Specifications

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Application:

Other, Compressed Air Pipelines

Material:

Carbon Steel or Stainless Steel

Connection Type:

Threaded Ends (NPT, BSP)

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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, Compressed Air Pipelines

Material Carbon Steel or Stainless Steel

Connection Type Threaded Ends (NPT, BSP)

Pressure Rating PN16, PN25, Class 150, Class 300

Valve Size DN15 to DN100 (1/2“ to 4“)

Operation Type Lever Handle or Gearbox

Seat Material PTFE, Reinforced PTFE, Metal

Test Standard CB/T3191, Mill Test Report Provided

Temperature Range -20°C to 200°C (depending on seat material)

As a leading manufacturer with a strong commitment to quality and reliability, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our CB/T3191 Marine Ball Valve. Designed specifically for demanding compressed air pipeline applications, this valve combines robust construction with precise engineering to ensure leak-free operation and long service life in marine and industrial environments. With our ISO9001 certified manufacturing processes and a proven track record of supplying to global markets, we deliver valves that meet stringent performance standards. Our focus on providing comprehensive documentation, including Mill Test Reports, gives our B2B partners the confidence and traceability they require for critical projects.

This marine-grade ball valve is engineered to handle the unique challenges of compressed air systems, where reliability and safety are paramount. Its design adheres to the CB/T3191 standard, ensuring compatibility and performance within marine piping systems.

Superior Sealing Performance: The valve features precision-machined ball and seat components, often made from PTFE or reinforced PTFE, which provide excellent sealing even under fluctuating pressure conditions common in compressed air lines. This minimizes air loss and maintains system efficiency.
Robust Construction for Marine Use: Constructed from durable materials like carbon steel or corrosion-resistant stainless steel, the valve body is built to withstand harsh marine atmospheres, including salt spray and humidity, ensuring longevity and reducing maintenance needs.
Easy Operation and Maintenance: Equipped with a standard lever handle or optional gearbox for larger sizes, the valve allows for quick quarter-turn operation. The full port design minimizes pressure drop across the valve, which is crucial for maintaining compressed air flow and energy efficiency.
Threaded Connection Convenience: The threaded ends (NPT, BSP standard) facilitate easy installation and integration into existing compressed air pipelines without the need for specialized welding equipment, saving time and labor costs.
Comprehensive Quality Assurance: Each valve undergoes rigorous pressure testing and inspection. The accompanying Mill Test Report provides verifiable data on material composition, mechanical properties, and test results, offering full traceability and peace of mind.

Key technical specifications for our CB/T3191 Marine Ball Valve are summarized in the table below. Please note that specific configurations can be customized upon request.

Parameter	Specification / Option
Design Standard	CB/T3191
Nominal Diameter (DN)	15, 20, 25, 32, 40, 50, 65, 80, 100
Pressure Rating	PN16, PN25, Class 150, Class 300
Body Material	Carbon Steel (WCB), Stainless Steel (CF8/304, CF8M/316)
Seat Material	PTFE, Reinforced PTFE, Metal (for high temp)
Connection	Threaded (NPT, BSPT, BSPP)
Operation	Lever Handle (Standard), Gearbox (Optional for DN≥50)
Temperature Range	-20°C to 200°C (Standard PTFE seat)

For our clients, the benefits are clear. You gain a reliable component that reduces downtime due to valve failure, ensures the safety of your compressed air system by preventing leaks, and simplifies procurement with fully documented quality. The threaded design allows for flexible system layout and easier future modifications.

With an annual export value ranging between US$1 Million and US$1.5 Million and a presence in major markets across North America, South America, Europe, Asia, Africa, and Oceania, Shanghai Zhibang Valve has established itself as a trusted global supplier. Our ISO9001 certification underpins every stage of production, from raw material sourcing to final testing. We ship efficiently from key ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery to your project site. Choose our CB/T3191 Marine Ball Valve for a combination of certified quality, proven marine performance, and the solid backing of an experienced manufacturer. Contact us today to discuss your specific requirements or to request a sample and full certification package.

Frequently Asked Questions (FAQ)

Q: Is this valve suitable only for marine applications?
A: While designed to the CB/T3191 marine standard, its robust construction makes it highly suitable for various industrial compressed air systems, offshore platforms, and other demanding environments where reliability is critical.
Q: What exactly is included in the Mill Test Report (MTR)?
A: The MTR is a certified document from the material manufacturer. It typically includes the heat number, chemical composition analysis, mechanical property test results (tensile strength, yield strength), and verification of compliance with the ordered material specification.
Q: Can I get valves with different thread standards?
A: Yes. We commonly supply valves with NPT (American) and BSP (British) threads. Please specify your required thread standard (e.g., NPT, BSPT, BSPP) and size when inquiring or placing your order.
Q: What are the advantages of a full port ball valve for compressed air?
A: A full port (or full bore) design has an internal diameter equal to the pipeline. This minimizes flow restriction and pressure drop, which is essential for maintaining the efficiency and consistent pressure of a compressed air system, potentially saving energy.
Q: How do I determine the correct pressure rating for my application?
A: The valve pressure rating (e.g., PN25, Class 150) should exceed the maximum operating pressure of your system, including any potential pressure surges. Our technical team can assist you in selecting the appropriate rating based on your system parameters.
Q: Are spare parts like seals and seats available?
A: Yes, we offer maintenance kits containing essential spare parts such as seat seals, stem seals, and gaskets. This ensures you can perform maintenance and extend the valve's service life easily.
Q: What is the typical lead time for an order?
A: Lead time depends on the order quantity and specific configuration. Standard models are often available from stock or have shorter production cycles. We provide estimated lead times with every quotation.
Q: Do you offer any customization?
A: We can discuss customization options such as specific material grades, special coatings or painting, locking devices for the handle, or extended stems. Please contact us with your detailed requirements.