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Help CenterMarine Freshwater Gate Valve CB/T3591, DN200, PN1.6MPa, For Shipboard Piping
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As a dedicated manufacturer with years of expertise in fluid control solutions, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our Marine Freshwater Gate Valve manufactured to the stringent CB/T3591 standard. Engineered specifically for demanding shipboard piping applications, this DN200, PN1.6MPa valve is built to ensure reliable isolation, long service life, and safe operation in marine and freshwater environments. Our commitment to ISO9001 quality management processes underpins every stage of production, delivering a product that meets the exacting requirements of global shipbuilders and repair yards. We understand the critical nature of onboard systems, which is why this valve is designed for durability and ease of maintenance, helping to minimize downtime and operational risks.
This gate valve is a cornerstone for controlling fluid flow in various shipboard systems. Its robust construction and adherence to marine-specific standards make it a trusted component for engineers and procurement specialists worldwide.
- Rugged Construction for Marine Duty: Designed to withstand the harsh conditions of marine operation, including vibration, potential corrosion, and variable pressure loads. The body and key components are selected from materials known for their strength and corrosion resistance, ensuring integrity over the valve's lifespan.
- Reliable Sealing Performance: Features a precision-machined gate and seat interface that provides bubble-tight shut-off when fully closed, preventing leaks in critical piping systems for ballast, cooling, firefighting, or general service.
- Standard-Compliant Design: Manufactured in strict compliance with the Chinese CB/T3591 standard for marine valves, ensuring dimensional interchangeability, pressure ratings, and material specifications are suitable for maritime applications.
- Easy Operation and Maintenance: The standard handwheel operation allows for straightforward manual control. The design facilitates maintenance, with the potential for seat and seal replacement depending on the specific model configuration, supporting long-term cost-effectiveness.
- Versatile Application Scope: Suitable for use with both freshwater and seawater in various onboard systems where on/off control is required. Its PN1.6MPa rating covers a wide range of standard service pressures.
Key technical specifications and configuration options for this marine gate valve are summarized below:
| Parameter | Specification / Description |
| Product Standard | CB/T3591 (Marine Valve Standard) |
| Valve Type | Gate Valve (Rising Stem, Outside Screw & Yoke common) |
| Nominal Diameter (DN) | 200 |
| Nominal Pressure (PN) | 1.6 MPa (Class 150 equivalent) |
| Connection Type | Flanged, dimensions as per CB/T3591 & associated flange standards |
| Operation | Handwheel (Standard). Gear Operation is available for high-torque applications. |
| Flow Direction | Generally bidirectional; specific design should be confirmed. |
| Main Body Material Options | Cast Steel (WCB), Ductile Iron, or other marine-grade materials upon request. |
| Trim Materials (Seat, Gate) | Stainless Steel, Bronze, or other alloys suitable for freshwater/seawater. |
| Packing | Graphite or PTFE-based packing for reliable stem sealing. |
Advantages and Customer Benefits:
- Enhanced System Reliability: The valve's robust design and tight sealing contribute to the overall reliability of the ship's piping system, reducing the risk of in-service failures.
- Reduced Lifecycle Costs: Durable materials and a service-friendly design help extend maintenance intervals and reduce the total cost of ownership through a longer service life.
- Global Supply Compatibility: Adherence to the CB/T3591 standard ensures the valve fits within common marine piping specifications, simplifying procurement and spare parts management for fleets operating worldwide.
- Supplier Assurance: Sourcing from an ISO9001-certified manufacturer provides confidence in consistent quality, production traceability, and professional after-sales support.
Shanghai Zhibang Valve's commitment to quality is demonstrated by our ISO9001 certification, which governs our manufacturing and quality control processes. Since our establishment in 2016, we have grown into a reliable partner for clients across North America, South America, Europe, Asia, Africa, and Oceania, with an annual export value reflecting strong international trust. Our valves are shipped efficiently from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring timely delivery to shipyards and marine suppliers globally. This particular CB/T3591 gate valve embodies our focus on delivering durable, specification-compliant products that perform under pressure. For a reliable component that meets marine standards and supports the smooth operation of your vessel's systems, contact us for detailed specifications, pricing, and delivery options.
Frequently Asked Questions (FAQ):
Q1: Is this valve suitable for both seawater and freshwater applications on ships?
A1: Yes, this gate valve is designed for marine freshwater service. The specific material selection for the body, trim (seat/gate), and internal parts can be configured to handle either seawater or freshwater effectively. It is crucial to specify the intended fluid during inquiry to ensure the correct corrosion-resistant materials are used.
Q2: What does the "CB/T3591" standard signify?
A2: CB/T3591 is a Chinese national professional standard specifically for marine valves. It defines requirements for design, dimensions, materials, pressure ratings, testing, and marking for valves used on ships and marine platforms. Valves conforming to this standard are recognized as suitable for marine applications.
Q3: Can this DN200 valve be operated manually, or is a gearbox required?
A3: The standard configuration includes a handwheel for manual operation, which is typically sufficient for DN200 at PN1.6MPa. However, for applications requiring easier operation or where high differential pressure exists, a gear operator can be supplied as an optional accessory. Please discuss your specific operational needs with us.
Q4: What are the common flange facing and drilling standards for this valve?
A4: As per common practice for CB/T3591 marine valves, the flanges typically conform to standards such as JIS, DIN, ANSI, or GB, depending on the ship's design specifications. The exact flange standard (e.g., RF face, drilling pattern) must be specified at the time of order to ensure proper piping connection.
Q5: What is the lead time for an order of these valves?
A5: Lead time depends on the order quantity, specific material configuration, and current production schedule. For standard material configurations, we generally maintain competitive lead times. We provide estimated delivery schedules upon receipt of a detailed inquiry or purchase order.
Q6: Do you offer customization, such as different end connections or materials?
A6: Yes, as a manufacturer, we can discuss customization options. This can include alternative materials for corrosive services, different end connections (if feasible), special painting or coating requirements per marine specifications, or the addition of locking devices. Customization may affect lead time and cost.
Q7: What testing is performed on the valves before shipment?
A7: Valves are subjected to routine tests as per the CB/T3591 standard and customer requirements. These typically include a shell strength test (hydrostatic pressure test) and a seat leakage test to verify pressure containment and sealing performance. Certified test reports can be provided upon request.
Q8: How does your company ensure quality control during manufacturing?
A8: Our quality management system is certified to ISO9001 standards. This involves controlled processes from material procurement and inspection, through machining and assembly, to final testing and packaging. This systematic approach aims to ensure each valve meets the specified requirements consistently.
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