Contact Platform Support
Help Center
Home > Industrial Equipment & Components > Valve > Butterfly Valve > CB/T3191 Standard Marine Ball Valve, Reduced Bore, Threaded Ends, PN16 Rating
CB/T3191 Standard Marine Ball Valve, Reduced Bore, Threaded Ends, PN16 Rating
Product Spotlights
CB/T3191 compliant marine ball valve with reduced bore for lower torque/weight and threaded ends for easy installation. PN16 rated, available in carbon/stainless steel with PTFE seats for corrosion resistance. Suitable for bilge, ballast, fuel, and cooling water lines. ISO9001 manufactured, with manual, gear, or actuator operation options.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Application:
Other, Marine & Offshore Piping Systems
Product Standard:
CB/T3191
Port Type:
Reduced Bore (Reduced Port)
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
Related Products
-
CB/T3191 Standard Marine Ball Valve With Low Flow Resistance, DN100 SizeNegotiableMOQ: 1 Unit -
Marine Ball Valve CB/T3191 Standard Compliant With Mill Test ReportNegotiableMOQ: 1 Unit
-
Full Bore Marine Ball Valve for Offshore Platform Fluid Control SystemsNegotiableMOQ: 1 Unit
-
CB/T3191 Standard Manual Gear Operated Marine Ball Valve PN1.6MPa to PN6.4MPaNegotiableMOQ: 1 Unit
-
CB/T3191 Manual Gear Marine Ball Valve for Shipboard Freshwater and Fuel Oil SystemsNegotiableMOQ: 1 Unit
Application
Other, Marine & Offshore Piping Systems
Product Standard
CB/T3191
Port Type
Reduced Bore (Reduced Port)
End Connection
Threaded Ends (NPT/BSP)
Pressure Rating
PN16 (Class 150)
Body Material
Carbon Steel / Stainless Steel / Bronze
Seat Material
PTFE / Reinforced PTFE / Metal
Ball Material
Chrome Plated / Stainless Steel
Operation
Lever Handle / Gearbox / Pneumatic / Electric Actuator
Temperature Range
-20°C to 200°C (depending on seat)
As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve is dedicated to providing reliable and high-performance fluid control solutions for the global marine industry. Our CB/T3191 Standard Marine Ball Valve with reduced bore and threaded ends is engineered specifically to meet the demanding requirements of shipboard and offshore applications. This valve combines robust construction with precise design to ensure leak-proof operation, easy maintenance, and long service life in corrosive saltwater environments. We understand that reliability at sea is non-negotiable, which is why this product is manufactured under a stringent ISO9001 quality management system, ensuring consistent performance and traceability for every unit shipped from our ports in Shanghai, Guangzhou, Hong Kong, or Beijing.
Core Product Features & Technical Advantages:
- Standard Compliance & Reliability: Manufactured strictly in accordance with the Chinese Marine Standard CB/T3191, which is widely recognized and accepted in international shipbuilding and repair. This ensures dimensional interchangeability and compliance with marine industry specifications for piping and valves.
-
Reduced Bore (Reduced Port) Design: The valve features a bore diameter smaller than the pipeline's inner diameter. This design offers significant benefits:
- Lower Torque & Easier Operation: Requires less force to operate, allowing for the use of smaller, more economical actuators (pneumatic/electric) or easier manual handling.
- Compact & Lightweight Structure: Results in a more compact valve body, reducing weight and saving valuable space in tightly packed engine rooms and machinery spaces.
- Cost-Effective: Generally more economical than full-port valves while maintaining excellent shut-off capability for on/off service.
- Threaded End Connections: Equipped with robust threaded ends (NPT or BSP threads are standard options), facilitating quick and secure installation into marine piping systems without the need for welding. This simplifies installation, maintenance, and replacement procedures.
- PN16 Pressure Rating: Rated for a nominal pressure of PN16 (equivalent to Class 150), making it suitable for a wide range of standard marine service pressures in systems such as bilge, ballast, cooling water, fuel oil, lubricating oil, and compressed air lines.
- Superior Sealing & Durability: Utilizes advanced seat materials like PTFE or reinforced PTFE, which provide excellent sealing, low friction, and resistance to a wide range of marine fluids. The ball is typically chrome-plated or made of stainless steel for superior corrosion resistance and smooth operation.
- Robust Construction & Anti-Corrosion: The valve body is crafted from materials like carbon steel with appropriate coatings (epoxy, galvanized) or stainless steel (CF8/CF8M) to withstand harsh marine atmospheres, saltwater spray, and high humidity.
- Versatile Actuation Options: Available with a standard lever handle for manual operation. It can also be easily fitted with gear operators for high-torque applications or automated with pneumatic and electric actuators for remote control, supporting the trend towards automated ship systems.
Key Technical Specifications:
| Parameter | Specification / Option |
|---|---|
| Design Standard | CB/T3191 |
| Pressure-Temperature Rating | PN16 (Class 150) |
| Port Type | Reduced Bore (Standard Port) |
| End Connection | Threaded (NPT, BSPP, BSPT) |
| Common Sizes (DN) | DN15 (1/2"), DN20 (3/4"), DN25 (1"), DN32 (1 1/4"), DN40 (1 1/2"), DN50 (2"), DN65 (2 1/2"), DN80 (3") |
| Body Material | Carbon Steel (WCB), Stainless Steel 304/316, Bronze |
| Seat & Seal Material | PTFE, Reinforced PTFE, Metal (for high temp) |
| Operation Temperature | -20°C to 180°C (PTFE seat), higher ranges available |
| Operation | Lever, Gear Operator, Pneumatic Actuator, Electric Actuator |
| Fire Safe Design | Optional, with anti-static device and fire-safe seats |
Benefits for Your Marine Projects:
- Enhanced System Reliability: Minimizes the risk of in-service failure, reducing downtime and maintenance costs for vessel operators.
- Simplified Inventory & Procurement: Compliance with a recognized standard (CB/T3191) ensures part interchangeability and simplifies your sourcing process.
- Optimized Lifecycle Cost: The durable construction and corrosion-resistant materials extend service intervals and valve lifespan, offering a favorable total cost of ownership.
- Flexibility in System Design: The combination of threaded ends and multiple material/actuation options allows engineers to integrate this valve seamlessly into various marine system designs.
Frequently Asked Questions (FAQ):
-
Q: Is the CB/T3191 standard accepted for international shipbuilding projects?
A: Yes, the CB/T3191 is a Chinese national standard for marine valves that is widely recognized and commonly specified, particularly in shipyards across Asia. It is also frequently accepted by international shipowners and classification societies for standard marine applications, ensuring global compatibility. -
Q: What is the main difference between a reduced bore and a full bore ball valve for marine use?
A: A reduced bore valve has a smaller flow passage than the connecting pipe, leading to a pressure drop but offering advantages like lower cost, lighter weight, and lower operating torque. A full bore valve has a flow passage equal to the pipe ID, minimizing pressure loss, ideal for pigging or where flow efficiency is critical. The reduced bore is a common and cost-effective choice for general on/off service. -
Q: Can this valve be used with seawater directly?
A: For seawater service, we strongly recommend selecting the stainless steel body (316/316L) option. Carbon steel valves with suitable epoxy or other marine-grade coatings can also be used, but material selection must align with the specific fluid's corrosiveness and project specifications. -
Q: Are the threaded ends tapered (NPT/BSPT) or parallel (BSPP)?
A> We can supply both types based on your requirement. Please specify your thread standard (NPT, BSPT, BSPP) and size when inquiring or placing an order to ensure a proper seal with your piping. -
Q: Is this valve suitable for fuel oil lines?
A: Yes, it is commonly used for fuel oil service. For such applications, it is advisable to opt for a fire-safe design (if required by regulations) and ensure the seat material (like PTFE) is compatible with the specific fuel type. -
Q: Do you provide valves with actuators?
A: Yes. We offer a complete package. The valve can be supplied as a manual unit or pre-assembled with pneumatic (on/off or modulating) or electric actuators. Please provide your required torque, control signal, and power supply details for a precise quotation. -
Q: What certifications do your valves have?
A> Our manufacturing process is certified under the ISO9001 Quality Management System, ensuring consistent quality control. Specific product certifications from classification societies (like ABS, BV, DNV, etc.) can be arranged upon request, subject to additional testing and charges. -
Q: What is your typical delivery time and main export regions?
A> For standard sizes and materials, our lead time is generally 15-30 days. We have extensive export experience, shipping to key markets including North America, Europe, Southeast Asia, the Middle East, Africa, and Oceania from major Chinese ports like Shanghai and Guangzhou.
Backed by our ISO9001-certified manufacturing expertise and an annual export value demonstrating our global reach, Shanghai Zhibang Valve stands as a reliable partner for your marine valve needs. This CB/T3191 Marine Ball Valve embodies our commitment to delivering durable, specification-compliant, and cost-effective solutions that perform under pressure. Whether you are a shipyard, a vessel operator, or a marine equipment supplier, choosing our valves means opting for proven reliability and professional support. Contact us today to discuss your specific requirements, request detailed technical data sheets, or obtain a competitive quotation for your next project.
Send Inquiry to This Supplier
* Email
Want the best price?
Post an RFQ now!
1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
You May Also Like
-
CB/T3191 Manual Gear Marine Ball Valve With Cast Steel Body and Flanged Ends DN50-DN200NegotiableMOQ: 1 Unit
-
CB/T3191 Manual Gear Marine Ball Valve Application in Marine Cargo Pump IsolationNegotiableMOQ: 1 Unit
-
316 Stainless Steel CB/T3191 Manual Gear Marine Ball Valve for Saltwater ApplicationsNegotiableMOQ: 1 Unit
-
Low Maintenance CB/T3191 Manual Gear Marine Ball Valve With Replaceable SealsNegotiableMOQ: 1 Unit
-
CB/T3191 Manual Gear Marine Ball Valve Supplied With Installation Manual and Spare Gear KitNegotiableMOQ: 1 Unit
-
Manual Gear Marine Ball Valve CB/T3191 DN100 PN4.0MPa Flanged ConnectionNegotiableMOQ: 1 Unit
-
CB/T3191 Manual Gear Marine Ball Valve With Lockable Handle for Offshore Platform UseNegotiableMOQ: 1 Unit
-
HF-1280 SERIES High Pressure Stainless Steel Globe Valve Flanged Threaded Globe Valve For Water Oil GasNegotiableMOQ: 10 Units
-
CB590-1995High Pressure Angle Globe Check Valve With Mounting PlateNegotiableMOQ: 50 Units
-
JIS / DIN / ASME Forged Steel High Pressure Globe Valve for ShipNegotiableMOQ: 20 Units
