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Low Torque Marine Flanged Butterfly Check Valve for Precise Flow Control in Ship Piping
Product Spotlights
Combines butterfly valve flow control with automatic check valve function in one compact, space-saving unit. Features a precision low-torque design for easier operation and reduced actuator costs. Built with robust, corrosion-resistant materials suitable for harsh marine environments like seawater systems. Offers precise flow modulation and reliable backflow prevention for ship ballast, cooling, and bilge piping. Available in a wide size range with flanged connections and optional automation for integration into modern vessel control systems.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Application:
Other, Ship Piping Systems (Ballast
Material:
Cast Steel/Ductile Iron with Corrosion-Resistant Coating
Connection Type:
Flanged (Standard ANSI/DIN/JIS)
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Ship Piping Systems (Ballast
Material
Cast Steel/Ductile Iron with Corrosion-Resistant Coating
Connection Type
Flanged (Standard ANSI/DIN/JIS)
Size Range
DN50 to DN600 (2“ to 24“)
Pressure Rating
PN10 to PN25 (Class 150 to Class 300)
Seat Type
Resilient Seated (EPDM/NBR/Viton Optional)
Operation
Wafer/Lug Type with Gearbox or Actuator Option
Standard Compliance
ISO 9001 Manufacturing Quality System
As a professional manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing reliable fluid control solutions for the global marine industry. Our Low Torque Marine Flanged Butterfly Check Valve is engineered to deliver precise flow management and dependable backflow prevention in demanding shipboard environments. With an annual export value reaching US$1-1.5 million, we have consistently supplied high-performance valves to markets across North America, South America, Europe, Asia, Africa, and Oceania, earning trust through quality and service.
This valve is designed to address the critical need for efficient, low-maintenance flow control in ship piping systems, combining the functions of a check valve and a butterfly valve into a single, compact unit. It ensures unidirectional flow while allowing for manual or automated modulation, making it an ideal choice for ballast, cooling, fuel, and bilge systems.
Core Product Features & Technical Advantages:
- Low Torque Design: The disc and shaft assembly is precision-balanced and utilizes low-friction bearings, significantly reducing the operating torque required. This allows for smaller, more cost-effective actuators and reduces wear on the valve components, extending service life.
- Integrated Check Function: Features a unique disc design that automatically closes upon flow reversal, preventing backflow and protecting upstream equipment like pumps and compressors without the need for a separate check valve.
- Robust Flanged Construction: Manufactured with standard flanges (ANSI, DIN, JIS) for secure, leak-free connections to ship piping. The robust body, typically cast steel or ductile iron with specialized marine-grade coatings, resists corrosion from seawater and harsh chemicals.
- Precise Flow Control: The disc can be positioned at any angle between fully open and fully closed, enabling accurate regulation of flow rates for optimal system performance. This is crucial for balancing systems and managing fluid transfer operations.
- Resilient & Reliable Sealing: Equipped with an elastomeric seat (EPDM standard, with NBR or Viton available) that provides a bubble-tight seal in the closed position and ensures smooth, low-friction operation. The seat is easily replaceable, minimizing downtime during maintenance.
- Versatile Actuation Options: Can be operated manually via a lever, gearbox, or automated with electric, pneumatic, or hydraulic actuators. This flexibility supports integration into modern, centralized ship control systems.
The following table outlines key specifications for standard models:
| Parameter | Specification / Range |
| Valve Size (Nominal Diameter) | DN50 (2") to DN600 (24") |
| Pressure Rating | PN10, PN16, PN25 (Class 150, Class 300) |
| Body Material | WCB Cast Steel, Ductile Iron, CF8/CF8M Stainless Steel (Optional) |
| Disc Material | WCB, CF8, Duplex Steel, Nickel-Aluminum Bronze (Marine Grade) |
| Seat Material | EPDM (Standard), NBR, Viton, PTFE |
| Shaft Material | Stainless Steel (17-4PH or 316SS) |
| Temperature Range | -20°C to +120°C (with EPDM seat), up to +200°C (with special seats) |
| End Connection | Wafer or Lug Type, Flanged per ANSI B16.5, DIN, JIS, BS |
| Operation | Manual Lever, Worm Gear, Electric/Pneumatic Actuator (Optional) |
Benefits for Your Marine Operations:
- Space and Weight Savings: The combined butterfly-check valve design eliminates the need for two separate valves and the associated piping, saving valuable space and reducing weight on board—a critical factor in ship design.
- Reduced Maintenance & Operating Costs: The low torque operation and durable materials minimize energy consumption for actuation and reduce the frequency of maintenance interventions, lowering the total cost of ownership.
- Enhanced System Safety and Reliability: The automatic check function provides fail-safe protection against backflow, preventing potential damage to pumps and system contamination, thereby increasing overall operational safety.
- Improved Process Efficiency: Precise flow control allows for optimal system tuning, improving the efficiency of cooling, ballast transfer, and other fluid handling processes on the vessel.
Frequently Asked Questions (FAQ):
-
Q: What is the main advantage of a "low torque" design in a marine butterfly check valve?
A: The low torque design requires less force to operate the valve, whether manually or via an actuator. This translates to smaller, more economical actuators, reduced wear on valve components, lower operating energy, and easier manual operation in emergency situations. -
Q: Can this valve be used for seawater applications?
A: Yes. We offer material configurations specifically for seawater service, such as nickel-aluminum bronze discs and shafts with high-grade stainless steel, along with specialized epoxy or rubber coatings on the body to resist corrosion. The seat material can be specified as EPDM or Viton for compatibility. -
Q: How does the integrated check function work, and is it reliable?
A: The disc is designed to pivot freely. Under forward flow, the pressure pushes the disc open. When flow stops or reverses, the backpressure and sometimes a light spring assist in rapidly closing the disc against the seat, creating a seal. The reliability is high due to the simple mechanical principle and the use of durable, corrosion-resistant materials. -
Q: What flange standards do you support?
A: We manufacture valves with flanges conforming to major international standards, including ANSI B16.5 (USA), DIN/EN (Europe), JIS (Japan), and BS (UK). Please specify your required standard and pressure class when inquiring. -
Q: Is the valve suitable for automated control systems?
A: Absolutely. The valve is designed for easy integration with electric, pneumatic, or hydraulic actuators. We can supply the valve as a complete package with your chosen actuator, including necessary brackets and controls, ready for installation into your ship's automation network. -
Q: What is the lead time for an order?
A: Lead times vary based on order quantity, size, material specifications, and actuation requirements. Standard configurations typically have shorter lead times. We provide accurate delivery estimates upon receipt of your detailed specifications. -
Q: Do you provide customization for specific project requirements?
A: Yes. As a manufacturer, we offer customization options including special materials, coatings, extended shafts, different flange facings (RF, FF, RTJ), and integration with specific actuator brands. Contact us with your project details for a tailored solution. -
Q: What after-sales support do you offer?
A: We provide comprehensive technical documentation, installation manuals, and spare parts support. Our team is available for technical consultation to ensure proper valve selection, installation, and troubleshooting.
Backed by our ISO 9001 certified manufacturing processes, every valve undergoes rigorous testing to ensure performance and durability. Our global reach, with exports to over a dozen major markets worldwide from key Chinese ports like Shanghai and Guangzhou, demonstrates our capability to meet international standards and deliver reliably. Choosing Shanghai Zhibang's Low Torque Marine Flanged Butterfly Check Valve means investing in a component that enhances the efficiency, safety, and reliability of your ship's piping systems while simplifying maintenance and reducing lifecycle costs. Contact us today to discuss your specific requirements and receive a competitive quotation.
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1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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