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Help CenterCB/T3191 Marine Air Valve For Ship Engine Room Compressed Air Supply, DN50-DN100
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As a specialized manufacturer of marine valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. brings you the CB/T3191 Marine Air Valve, engineered specifically for the demanding environment of ship engine room compressed air supply systems. Our valves are designed to provide reliable, leak-free control of compressed air, a critical utility for starting main engines, operating pneumatic tools, and controlling various shipboard systems. With an annual export value demonstrating our global reach across markets from North America to Southeast Asia, we understand the stringent requirements for marine equipment. This valve is a cornerstone of our product line, reflecting our commitment to quality certified by ISO9001 and adherence to the specialized CB/T3191 standard for shipbuilding.
The CB/T3191 Marine Air Valve is more than just a shut-off device; it is a vital safety and operational component. Constructed from robust materials suitable for marine corrosion resistance, it ensures a secure and durable connection within your compressed air piping network. Its design prioritizes easy operation and maintenance, crucial for the efficient running of any vessel. Let's delve into the features that make this valve an excellent choice for shipbuilders, repair yards, and vessel operators worldwide.
Key Features & Technical Advantages:
- Robust Construction for Marine Environments: Available in materials like cast iron, ductile iron, cast steel, and stainless steel to combat corrosion from saltwater atmospheres and ensure long service life.
- Standard-Compliant Design: Manufactured in strict accordance with the CB/T3191 standard, ensuring compatibility and performance expected in Chinese shipbuilding and widely accepted in international marine projects.
- Reliable Sealing Performance: Features soft seals (typically NBR) or optional metal-to-metal seals, providing a bubble-tight shut-off for compressed air systems, preventing energy loss and ensuring system pressure integrity.
- Easy Operation and Maintenance: The manual lever operation is designed for positive and quick opening/closing. The simple structure allows for easy inspection and seal replacement if necessary, minimizing downtime.
- Wide Size and Pressure Compatibility: Covers common pipeline sizes from DN50 to DN100 with standard pressure ratings like PN10, PN16, and PN25, offering flexibility for different system designs.
- Flanged Connection for Secure Installation: Standard flanged ends provide a strong, bolt-connected interface that is resistant to vibration and easy to install or remove during maintenance.
Technical Specifications Overview:
| Parameter | Specification |
| Product Standard | CB/T3191 |
| Nominal Diameter (DN) | 50, 65, 80, 100 mm |
| Pressure Rating (PN) | 10, 16, 25 bar |
| Connection Type | Flanged (RF face common) |
| Body Material | Cast Iron / Ductile Iron / Cast Steel / Stainless Steel |
| Seal Material | NBR (Standard), Metal Seal (Optional) |
| Operation Mode | Manual Lever |
| Applicable Medium | Compressed Air, Inert Gases |
| Temperature Range | -20°C to +150°C (dependent on seal material) |
Benefits for Your Marine Operations:
- Enhanced System Reliability: A reliable air valve prevents leaks that can lead to pressure drops, ensuring pneumatic tools and engine starters function when needed.
- Reduced Maintenance Costs: Durable construction and simple design translate to less frequent repairs and easier servicing, lowering the total cost of ownership.
- Safety Assurance: Positive shut-off capability enhances the safety of the compressed air system, allowing for safe isolation during maintenance.
- Global Supply Chain Compatibility: Adherence to the CB/T3191 standard makes this valve a suitable choice for shipyards worldwide, particularly those familiar with or requiring this specification.
- Flexible Sourcing: Available in multiple material grades and sizes, allowing you to select the optimal valve for specific corrosion zones or pressure requirements on the vessel.
Choosing Shanghai Zhibang's CB/T3191 Marine Air Valve means partnering with an established manufacturer whose products are trusted across continents, from Eastern Europe to Oceania. Our ISO9001 certification underpins our consistent manufacturing quality, while our experience in serving diverse global markets ensures we understand the practical needs of marine engineers. Shipped from major ports like Shanghai and Guangzhou, we offer logistical efficiency to keep your projects on schedule. For a dependable, standard-compliant solution for your ship's compressed air system, contact us for a quotation or detailed technical consultation today.
Frequently Asked Questions (FAQ):
Q1: Is this valve suitable for use with other gases besides compressed air?
A: Primarily designed for compressed air systems, it can also be used with inert gases like nitrogen. However, compatibility with other specific gases (e.g., oxygen, fuel gas) must be verified based on the seal material and application safety standards.
Q2: What is the main advantage of the CB/T3191 standard compared to other valve standards?
A: CB/T3191 is a Chinese national standard specifically developed for shipbuilding. Valves conforming to this standard are designed with considerations for marine environmental factors like vibration, corrosion, and space constraints common in engine rooms, ensuring better suitability for marine applications.
Q3: Can you provide valves with different flange standards, like ANSI or JIS?
A: While the standard offering complies with the flange dimensions referenced in CB/T3191 (typically Chinese GB standard), we can often accommodate requests for ANSI or JIS flanges as a customization option. Please inquire with your specific requirements.
Q4: What is the typical lead time for an order of DN80 valves?
A: Lead times vary based on order quantity, material selection, and current production schedule. For standard materials like cast iron, we generally maintain stock or short production cycles. Contact us with your desired quantity for an accurate delivery estimate.
Q5: How do I select between a soft seal (NBR) and a metal seal?
A: NBR soft seals offer excellent sealing and are standard for general compressed air service. Metal seals are recommended for higher temperature applications, more abrasive conditions, or where the medium may degrade elastomers. Our technical team can advise based on your operating parameters.
Q6: Are spare parts like seal kits readily available?
A: Yes, as the manufacturer, we maintain an inventory of critical spare parts, including seal rings and gaskets, ensuring you can source maintenance kits quickly to minimize vessel downtime.
Q7: Does the valve come with any operational markings or nameplate?
A: Yes, our valves are typically marked with essential information such as the flow direction arrow, pressure rating (PN), nominal size (DN), and material designation, which is crucial for proper installation and identification.
Q8: Can you provide documentation like material certificates and test reports?
A> Certificates of Conformity, material test reports, and pressure test reports are available upon request. Our ISO9001 quality system ensures proper documentation trails for our products.
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