Contact Platform Support
Help CenterLow Torque Marine Butterfly Valve With Full PTFE Lining and Wafer/Lug Design for Seawater Systems
Product Spotlights
Related Products
-
Wafer & Flanged Marine Butterfly Valve With EPDM Rubber Lining for Seawater ServiceNegotiableMOQ: 1 Unit -
DN80-DN500 Marine Rubber Lined Butterfly Valve, Lever/Gear/Actuator OperatedNegotiableMOQ: 1 Unit
-
Marine Rubber Lined Butterfly Valve for Bilge, Ballast, and Cooling Water LinesNegotiableMOQ: 1 Unit
-
Corrosion-Resistant Marine Butterfly Valve for Offshore Platform Seawater IntakeNegotiableMOQ: 1 Unit
-
Full Lug Marine Butterfly Valve With EPDM Liner for Shipboard Piping SystemsNegotiableMOQ: 1 Unit
As a leading manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve is dedicated to providing reliable fluid control solutions for demanding marine environments. Our Low Torque Marine Butterfly Valve with Full PTFE Lining is engineered specifically to combat the harsh challenges of seawater systems, offering superior corrosion resistance, minimal maintenance, and long-term operational reliability. This valve represents our commitment to combining advanced material science with robust mechanical design, ensuring optimal performance for shipbuilding, offshore platforms, desalination plants, and coastal infrastructure projects worldwide. With an annual export value demonstrating our global reach across continents from North America to Oceania, we understand the critical needs of marine engineers and system designers.
The core innovation of this valve lies in its full PTFE (Polytetrafluoroethylene) lining, which completely isolates the metallic valve body from the corrosive medium. This design is crucial for seawater applications where chloride-induced corrosion, scaling, and biofouling are constant threats. The PTFE lining provides a non-stick, chemically inert surface that prevents adhesion of marine organisms and mineral deposits, ensuring consistent flow characteristics and reducing the need for frequent cleaning. The low torque operation is achieved through a precision-engineered disc profile and high-quality bearing systems, allowing for easier manual operation or enabling the use of smaller, more cost-effective actuators, which reduces the overall system weight and energy consumption—a critical factor in marine vessel design.
Key Technical Features & Specifications:
- Unmatched Corrosion Resistance: The full PTFE lining acts as a permanent barrier, protecting the valve body (typically carbon steel, ductile iron, or stainless steel) from direct contact with seawater, brines, and other aggressive chemicals commonly found in marine systems.
- Superior Seat & Seal Integrity: The PTFE seat provides a bubble-tight seal with excellent resilience. Its low friction coefficient contributes directly to the low operating torque and ensures smooth, wear-resistant operation over thousands of cycles.
- Versatile End Connection Design: Available in both wafer and lug styles. The wafer design is compact and lightweight, ideal for space-constrained installations between two pipe flanges. The lug design provides threaded inserts, allowing the valve to be installed at the end of a pipeline or easily removed without disturbing the entire piping section, which is highly valued for maintenance.
- Robust Disc Options: The disc is available in 316 stainless steel (CF8M) for maximum corrosion resistance or nickel-plated ductile iron for cost-effective solutions in less severe conditions. The disc shape is optimized for minimal flow turbulence and pressure drop.
- Broad Operational Range: Suitable for a wide temperature spectrum and standard pressure ratings, making it adaptable for various system requirements from cooling water lines to ballast water treatment systems.
The following table outlines standard specifications for common valve sizes:
| Valve Size (DN / Inch) | Approx. Weight (Wafer, kg) | Max. Working Pressure (PN16) | Standard Torque (Manual, Nm) |
|---|---|---|---|
| DN50 / 2" | 2.5 | 16 bar | 15 |
| DN150 / 6" | 12 | 16 bar | 60 |
| DN300 / 12" | 45 | 16 bar | 280 |
| DN500 / 20" | 120 | 10 bar | 650 (Gear operated) |
Benefits for Your Marine Project:
- Extended Service Life & Reduced TCO: Dramatically lowers lifecycle costs by eliminating corrosion-related failures, reducing downtime, and minimizing replacement frequency compared to unlined or rubber-lined valves in seawater.
- Enhanced System Efficiency: Low torque operation translates to lower actuation energy and reduced wear on operators. The smooth PTFE surface maintains a high Cv (flow coefficient), optimizing system hydraulics.
- Maintenance Simplification: The inert lining resists scaling and biological growth, decreasing the need for chemical cleaning or mechanical scraping. Routine maintenance is often limited to periodic inspection of the actuator.
- Design Flexibility: The availability of wafer and lug designs, along with multiple material combinations for disc and stem, allows for precise matching to your specific piping layout, pressure class, and corrosion budget.
- Reliable Performance: Consistent sealing performance and operational smoothness ensure reliable isolation and control of critical seawater flows, contributing to overall vessel or plant safety and efficiency.
Backed by our established manufacturing expertise since 2016 and a proven track record of supplying valves to global markets, you can trust Shanghai Zhibang Valve as a stable and capable partner. Our products are shipped from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring efficient logistics to your project site anywhere from Eastern Europe to Southeast Asia. The ISO9001 certification underpins our commitment to consistent quality in every valve we produce. Choose this low-torque, PTFE-lined marine butterfly valve to secure a durable, efficient, and cost-effective solution for your most challenging seawater applications. Contact us today to discuss your specifications or request a detailed quotation.
Frequently Asked Questions (FAQ):
-
Q: What are the main advantages of a full PTFE lining compared to a rubber lining for seawater?
A: PTFE offers superior chemical inertness, a wider temperature range, better resistance to permeation and aging, and a non-stick surface that greatly reduces marine fouling and scaling. It typically provides a longer service life in highly corrosive seawater environments. -
Q: Can this valve be used for other fluids besides seawater?
A: Absolutely. The full PTFE lining makes it suitable for a wide range of aggressive media, including strong acids, alkalis, chlorides, and various chemical process streams where corrosion resistance and purity are required. -
Q: What is the difference between the wafer and lug design, and how do I choose?
A: A wafer valve is installed between two flanges using long bolts. A lug valve has threaded inserts (lugs) allowing it to be bolted directly to each mating flange, enabling end-of-line service or easier removal. Choose wafer for standard inline connections and lug for end-of-line service or where disassembly is frequent. -
Q: What types of actuators are compatible with this valve?
A: The valve is designed for low torque, making it compatible with manual levers, manual gear operators, electric actuators, pneumatic actuators, and hydraulic actuators. The specific mounting interface (ISO 5211 standard is common) can be specified. -
Q: What is the expected service life of the PTFE lining in continuous seawater service?
A: Under standard operating conditions (temperature, pressure, flow), the PTFE lining can provide reliable service for many years, often exceeding the lifespan of elastomer linings. The actual life depends on specific service conditions like cyclic frequency and presence of abrasives. -
Q: Do you provide custom sizes or pressure ratings outside the standard range?
A: Yes, as a manufacturer, we can often accommodate requests for non-standard sizes, special face-to-face dimensions, or higher pressure classes. Please inquire with your specific requirements for feasibility and lead time. -
Q: How is the quality of the PTFE lining ensured during manufacturing?
A: The lining process involves specialized techniques to ensure a uniform, void-free, and securely bonded PTFE layer to the valve interior. Our ISO9001 quality system includes inspection checkpoints for lining thickness, integrity, and adhesion strength. -
Q: What information do you need to provide an accurate quotation?
A: Please provide the valve size (DN/NPS), design type (wafer/lug), pressure rating, disc material preference, type of operation (manual/actuated), actuation details if needed, connection standard, and the quantity required.
Send Inquiry to This Supplier
You May Also Like
-
Ductile Iron Body Marine Rubber Lined Butterfly Valve, EPDM/NBR Liner, DN50-DN600NegotiableMOQ: 1 Unit
-
PN10/PN16 Marine Rubber Lined Butterfly Valve, Ductile Iron Body, 316 Stainless Steel StemNegotiableMOQ: 1 Unit
-
Marine Rubber Lined Butterfly Valve With 12-Month Warranty and Mill Test ReportNegotiableMOQ: 1 Unit
-
Standard Compliant Marine Butterfly Valve With Technical Support and Spare Parts AvailableNegotiableMOQ: 1 Unit
-
Fire-Safe Design Marine Butterfly Valve With Rubber Lining and Metal Seat BackupNegotiableMOQ: 1 Unit
-
Marine Desulfurization Tower Butterfly Valve With Extended 2-Year Warranty on Seal AssemblyNegotiableMOQ: 1 Unit
-
Marine Butterfly Valve for FGD Tower Applications, Duplex Stainless Steel Body, High Pressure RatedNegotiableMOQ: 1 Unit
-
Acid-Resistant Marine Butterfly Valve for Flue Gas Desulfurization, PTFE Lined, Mill Test Report ProvidedNegotiableMOQ: 1 Unit
-
Low Torque Marine Butterfly Valve for Desulfurization Tower Control, Wafer/Lug DesignNegotiableMOQ: 1 Unit
-
Marine Butterfly Valve for Desulfurization Systems, Complete With Installation Guide and Technical SupportNegotiableMOQ: 1 Unit
