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Help CenterCB/T3191 Marine Ball Valve With Mill Test Report Provided
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As a professional manufacturer specializing in marine fluid control solutions, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our high-performance CB/T3191 Marine Ball Valve. Engineered to meet the rigorous demands of the shipbuilding industry, this valve is designed for reliable, long-lasting service in critical marine applications. Our commitment to quality, backed by ISO9001 certified manufacturing processes since 2016, ensures every valve delivers the performance and durability required for safe and efficient vessel operation. We understand that marine environments demand components that can withstand corrosion, pressure, and constant use, which is why our CB/T3191 valves are manufactured with precision and subjected to stringent testing, including the provision of a comprehensive Mill Test Report (MTR) for full material traceability and quality assurance.
The CB/T3191 standard specifies the technical requirements for marine ball valves, and our product is a faithful and high-quality embodiment of these specifications. It is a quarter-turn valve that uses a perforated, pivoting ball to control flow. When the valve is open, the ball's hole aligns with the flow direction, allowing media to pass through. A 90-degree rotation of the handle positions the solid side of the ball across the flow path, providing a tight seal and complete shut-off. This simple yet robust design offers several distinct advantages for marine engineers and shipbuilders.
- Superior Sealing Performance: The valve features advanced seat materials and a precision-machined ball, ensuring a bubble-tight seal even after prolonged cycling. This is critical for preventing leaks in fuel, bilge, ballast, and other shipboard systems.
- Low Torque Operation: The streamlined flow path and low-friction design allow for easy operation, reducing the effort required by crew members, which is especially important for larger valve sizes.
- Quick Opening/Closing: The quarter-turn operation enables rapid response in emergency situations or during routine system adjustments, enhancing operational safety and efficiency.
- Minimal Pressure Drop: When fully open, the bore of the ball valve is almost equal to the pipeline diameter, resulting in very little flow resistance and helping to maintain system pressure and pump efficiency.
- Durability & Corrosion Resistance: Constructed from marine-grade materials such as carbon steel with suitable coatings or stainless steel (316/316L), the valve offers excellent resistance to saltwater corrosion, making it ideal for both interior and exterior marine installations.
- Versatile Actuation Options: While supplied with a standard manual lever, our valves can be easily fitted with gear operators for high-torque applications or automated with pneumatic, hydraulic, or electric actuators for remote control and integration into the ship's automation systems.
- Bi-Directional Flow: The symmetrical design allows the valve to be installed in either flow direction without compromising its sealing capability or performance.
To help you specify the correct valve for your project, here are some of the key technical parameters:
| Parameter | Specification |
|---|---|
| Design Standard | CB/T3191 (China Shipbuilding Standard) |
| Size Range (Nominal Diameter) | DN15 (1/2") to DN600 (24") |
| Pressure Rating | PN10, PN16, PN25, PN40 / Class 150, Class 300 |
| Body Material (Common) | WCB Carbon Steel, CF8/CF8M Stainless Steel |
| Ball & Stem Material | Stainless Steel (304/316), with various coatings available |
| Seat Material | PTFE (Standard), Reinforced PTFE, Metal (for high temp) |
| Temperature Range | Standard: -20°C to +200°C (depends on seat material) |
| End Connection | Flanged (RF, FF), Threaded (NPT, BSPT/BSPP), Socket Weld |
| Fire Safe Design | Available upon request (to API 607/API 6FA standards) |
Choosing our CB/T3191 Marine Ball Valve provides tangible benefits for shipyards, naval architects, and vessel operators. It simplifies procurement by meeting a recognized industry standard, reduces maintenance costs through reliable performance, and enhances overall system safety. The included Mill Test Report is not just a document; it's your guarantee. It details the chemical composition and mechanical properties of the raw materials used, providing full traceability and proof that the valve meets its specified material grades. This is a crucial requirement for classification society approvals and for maintaining high standards in marine engineering projects worldwide.
With an annual export value ranging between US$1 Million and US$1.5 Million, Shanghai Zhibang has established a strong reputation for delivering quality valves to a global clientele across North America, South America, Europe, Asia, Africa, and Oceania. Our products are shipped from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring efficient and flexible logistics to meet your project timelines. Our experience in serving diverse international markets means we understand the specific requirements and standards expected in different regions. When you partner with us, you are not just buying a valve; you are gaining access to reliable manufacturing expertise, comprehensive quality documentation, and a product built to perform in the challenging marine environment. Contact us today to discuss your requirements, request a detailed quotation, or obtain a sample Mill Test Report to verify our commitment to quality and transparency.
Frequently Asked Questions (FAQ)
Q1: What is the significance of the CB/T3191 standard?
A1: CB/T3191 is a Chinese national professional standard specifically for marine ball valves. It defines the design, manufacturing, testing, and acceptance criteria to ensure the valves are suitable for the harsh conditions and safety-critical applications found on ships and offshore platforms. Valves conforming to this standard are widely recognized and accepted in the global shipbuilding industry.
Q2: Is the Mill Test Report (MTR) provided for every valve?
A2: Yes, a Mill Test Report (also called Material Test Report or Certificate) is provided as a standard documentation package with our CB/T3191 valves. This report, issued by the material mill, certifies the chemical and physical properties of the metal used for critical components like the valve body, ball, and stem.
Q3: Can these valves be used with seawater?
A3: Absolutely. For seawater applications, we typically recommend valves constructed from 316/316L stainless steel or carbon steel with specialized marine-grade coatings (like epoxy or zinc-nickel) to provide superior resistance to saltwater corrosion. Please specify the media during inquiry for correct material selection.
Q4: Are your valves suitable for remote operation?
A4: Yes. While supplied as manual valves, they are designed to be compatible with various actuators. We can supply the valves pre-fitted with pneumatic, hydraulic, or electric actuators, or you can source the actuators separately. The valve design includes a standardized mounting interface for easy automation.
Q5: What is the lead time for an order?
A5: Lead time depends on the order quantity, size, material specification, and any special requirements (like actuation). For standard specifications in moderate quantities, typical lead times range from 30 to 60 days. We provide accurate lead time estimates with every formal quotation.
Q6: Do you offer customization beyond the standard CB/T3191 specifications?
A6: Yes, we offer a range of customizable options. These include special coatings, extended stem lengths for insulated lines, locking devices, different handle types, and compliance with additional international standards like ISO, DIN, or ANSI/API. Please discuss your specific needs with our technical sales team.
Q7: What quality certifications does your manufacturing process hold?
A7: Our manufacturing facility is certified to the ISO9001:2015 Quality Management System standard. This certification underpins our consistent production processes, quality control checks, and traceability systems, ensuring reliable and repeatable product quality.
Q8: How do you ensure packaging for safe ocean freight?
A8: Valves are carefully cleaned, dried, and preserved (with VCI or desiccant as needed). They are then packed in sturdy wooden cases or pallets designed to withstand the rigors of international shipping. Flanges and threaded ends are protected with plastic caps to prevent damage during transit.
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