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Help CenterCB/T465-1995 Marine Cast Iron Gate Valve With Blow-Proof Handwheel
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As a professional manufacturer with a strong foundation since 2016 and ISO9001 certified quality management, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our high-performance Marine Cast Iron Gate Valve, meticulously engineered to meet the stringent CB/T465-1995 standard. This valve is specifically designed for demanding marine applications, featuring a critical blow-proof handwheel that ensures operational safety and reliability in challenging offshore and shipboard environments. We combine robust manufacturing capabilities with a deep understanding of maritime industry requirements to deliver components that shipbuilders and marine engineers can trust for critical fluid control systems.
Our commitment to quality is reflected in our annual export value, serving a diverse global clientele across continents including North America, Europe, Southeast Asia, and Africa from our strategic base in Shanghai. This valve embodies our dedication to producing durable, safe, and compliant marine hardware.
Detailed Product Features & Technical Specifications:
This valve is engineered for isolation service in marine piping systems, handling seawater, ballast, fuel oil, lubricating oil, and other shipboard fluids. Its design prioritizes longevity and fail-safe operation.
- Robust Cast Iron Construction: The valve body, bonnet, and gate are manufactured from high-grade cast iron, offering excellent corrosion resistance against seawater and marine atmospheres, combined with high mechanical strength to withstand pipeline stresses and vibration.
- CB/T465-1995 Compliance: This Chinese ship standard specifies requirements for marine valves, ensuring the product meets dimensional, material, testing, and marking criteria suitable for marine use, providing a recognized benchmark for quality and interoperability in shipbuilding.
- Blow-Proof Handwheel Design: The standout safety feature. The handwheel is designed to prevent accidental detachment or "blowing off" due to sudden internal pressure surges when the valve is in operation. This is a crucial safety mechanism protecting personnel.
- Rising Stem & Metal Seat: Features a rising stem design for clear visual indication of the valve position (open/closed). The metal-to-metal seat ensures reliable shut-off and durability, suitable for a wide range of temperatures without degradation.
- Flanged Connection: Standard configuration includes flanged ends conforming to common marine flange standards (e.g., JIS, DIN, ANSI), facilitating easy and secure installation into ship piping systems. Other end connections may be available upon request.
- Full Bore Design: Provides minimal flow restriction and pressure drop when fully open, which is efficient for pumping systems and reduces energy consumption.
Technical Parameters Table:
| Parameter | Specification |
| Product Standard | CB/T465-1995 |
| Body Material | Cast Iron |
| Nominal Pressure (PN) | PN16 / Class 150 |
| Nominal Size (DN) | Commonly DN50 to DN300 (Customizable) |
| Seat & Seal Material | Cast Iron / Metal |
| Stem Material | Stainless Steel (Optional) |
| Operation Temperature | -20°C to 200°C |
| Operation Mode | Manual (Handwheel) |
| Connection Standard | Flanged (Standard as per order) |
| Applicable Medium | Sea Water, Oil, Air, Non-corrosive Fluids |
Advantages & Customer Benefits:
- Enhanced Marine Safety: The blow-proof handwheel directly addresses a key safety hazard in marine engineering, reducing risk for crew and protecting system integrity.
- Proven Durability: Cast iron construction ensures long service life even in corrosive marine environments, reducing maintenance frequency and total cost of ownership.
- Regulatory Compliance: Adherence to the CB/T465-1995 standard simplifies the specification and approval process for shipyards and marine equipment suppliers, ensuring acceptance in many markets.
- Global Supply Reliability: With annual exports valued between US$1-1.5 million and shipment capabilities from major ports like Shanghai, Guangzhou, and Hong Kong, we offer dependable logistics for global projects.
- Versatile Application: Suitable for various ship systems including bilge, ballast, cooling, firefighting, and fuel lines, making it a versatile component for inventory.
Backed by our ISO9001 certification, which governs our entire manufacturing process from material sourcing to final testing, this Marine Cast Iron Gate Valve represents a reliable choice. Our established presence since 2016 and successful penetration into diverse markets from Eastern Europe to Oceania testify to the consistent quality and performance of our products. We understand the critical nature of marine components and build valves that are designed to perform under pressure, literally and figuratively. For your next shipbuilding, repair, or retrofit project, choose a valve that prioritizes safety with its blow-proof design and reliability through robust construction. Contact us today to discuss your specifications, request a quotation, or learn more about our full range of marine valves tailored for global maritime applications.
Frequently Asked Questions (FAQ):
Q1: What does "blow-proof handwheel" mean, and why is it important for marine valves?
A1: A blow-proof handwheel is designed with a locking or retaining mechanism to prevent it from being forcefully detached from the valve stem if internal pressure is accidentally trapped and released when operating the valve. In marine environments, this is a critical safety feature to prevent injury to personnel and damage to equipment.
Q2: Is the CB/T465-1995 standard internationally recognized?
A2: CB/T standards are Chinese shipbuilding standards. They are widely recognized and accepted in many international maritime projects, especially in Asia and among owners building vessels in Chinese shipyards. It signifies the valve is built to specific marine-grade requirements.
Q3: Can this valve be used for seawater service?
A3: Yes, the cast iron material offers good resistance to seawater corrosion. However, for prolonged seawater immersion or highly aggressive conditions, specifying optional materials like bronze or stainless steel for certain trim parts (e.g., stem) is recommended and can be discussed.
Q4: What are the available pressure classes and sizes?
A4: The standard pressure rating is PN16/Class 150. Common sizes range from DN50 (2") to DN300 (12"). We can manufacture valves outside this standard range based on customer drawings or specifications.
Q5: Do you offer different end connections besides flanged?
A5: Flanged ends are the standard for marine gate valves to facilitate bolting to piping. Other connection types like threaded (NPT, BSP) may be available for specific applications or smaller sizes. Please inquire with your requirements.
Q6: What is the lead time for production and delivery?
A6: Lead time depends on order quantity and specifications. Standard items may have shorter lead times. We ship from Shanghai, Guangzhou, Hong Kong, or Beijing ports, offering flexible logistics. We provide estimated timelines upon order confirmation.
Q7: Are testing certificates provided with the valves?
A7> Yes, as an ISO9001 certified manufacturer, we conduct pressure tests (shell and seat) and other quality checks. Standard test certificates can be provided with the shipment. Additional certification per specific class society rules may be arranged upon request.
Q8: What is the primary application of this gate valve on a ship?
A8: Its primary use is for on/off isolation in various shipboard piping systems. Typical applications include ballast water systems, bilge lines, cooling water systems, fuel oil transfer lines, compressed air systems, and general service lines.
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