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Help CenterMarine Butterfly Valve Manufacturer, GB/T3036, Manual/Gear/Actuator Operated Options
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As a dedicated manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in producing high-performance, reliable marine butterfly valves. Our valves are engineered to meet the rigorous demands of marine and offshore applications, ensuring safe and efficient control of fluid flow in seawater cooling systems, ballast systems, fuel lines, and other critical shipboard services. Manufactured in strict compliance with the GB/T3036 standard, our butterfly valves offer robust construction, excellent sealing performance, and versatile operation options to suit diverse project requirements. With an annual export value demonstrating our global reach, we are committed to providing quality products that shipbuilders, shipyards, and marine engineers can depend on.
Our marine butterfly valves are designed for durability and longevity in harsh saltwater environments. The core construction utilizes high-grade materials selected for their corrosion resistance and mechanical strength.
- Body & Disc Materials: We offer ductile iron with epoxy coating for standard applications, stainless steel (CF8/CF8M) for superior corrosion resistance, and bronze for specific seawater compatibility needs.
- Seat & Seal Options: The valve seat, critical for leak-tight shut-off, is available in EPDM for general water, NBR for oil/fuel services, and PTFE for wider chemical compatibility and higher temperature ranges.
- Stem Design: A one-piece or two-piece stainless steel stem is standard, ensuring high torque strength and resistance to galvanic corrosion.
A key feature of our product line is the availability of multiple operation methods, providing flexibility for different system designs and automation levels.
- Manual Operation: Features a durable hand lever or a worm gear operator. The gearbox provides mechanical advantage for easier operation of larger size valves under higher pressures.
- Actuator Operation: Valves can be fitted with electric or pneumatic actuators for remote and automated control, essential for modern vessel automation systems. Actuators are available upon request and can be customized for specific voltage, signal, and fail-safe requirements.
The valves are built to precise technical specifications to ensure reliable performance. Below is a summary of key parameters for our standard series:
| Parameter | Specification |
|---|---|
| Design Standard | GB/T3036 |
| Nominal Diameter (DN) | 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000, 1200 |
| Pressure Rating (PN) | 10, 16, 25 |
| Leakage Class | Class A (Zero Leakage) with soft seat; Meets relevant test standards |
| Operating Temperature | -20°C to +80°C (EPDM/NBR); -20°C to +120°C (PTFE) |
| Face-to-Face Dimension | Complies with GB/T3036, ensuring interchangeability |
The advantages of choosing our marine butterfly valves translate into tangible benefits for your projects:
- Compact & Lightweight: The wafer or lug design offers significant space and weight savings compared to gate valves, a crucial factor in marine design.
- Quick Operation & Good Flow Control: The 90-degree quarter-turn operation allows for fast opening/closing. The disc design provides a relatively linear flow characteristic for effective throttling when needed.
- Low Maintenance & Long Service Life: Simple design with few moving parts reduces maintenance needs. Corrosion-resistant materials and robust construction ensure reliable service even with minimal upkeep.
- Cost-Effective Solution: Competitive pricing combined with low lifetime costs due to durability and easy maintenance offers an excellent return on investment.
Our commitment to quality is backed by our ISO9001 certification, which governs our entire manufacturing and quality control process. This ensures every valve that leaves our Shanghai facility meets consistent, high standards. With a proven track record of exporting to major markets across North America, South America, Europe, Asia, Africa, and Oceania, we understand the diverse requirements of the global marine industry. We support our clients with flexible shipping options from ports in Shanghai, Guangzhou, Hong Kong, and Beijing. For your next marine or offshore project requiring dependable fluid control, partner with a manufacturer that combines technical expertise with proven reliability. Contact us today to discuss your specifications, request a quote, or explore our customizable options for manual, gear, or actuator-operated butterfly valves.
Frequently Asked Questions (FAQ)
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Q: What is the main difference between a wafer-type and a lug-type marine butterfly valve?
A: A wafer-type valve is installed between two flanges using through-bolts and relies on the flange connection for sealing pressure. A lug-type valve has threaded inserts (lugs) on the valve body, allowing it to be bolted directly to each flange, enabling the downstream side to be disconnected independently. Lug-type is often preferred for end-of-line service or where system disassembly is frequent. -
Q: Are your valves suitable for seawater service?
A: Yes, they are designed for marine applications. We recommend specific material combinations for seawater, such as stainless steel (CF8M/316) body/disc with EPDM or PTFE seats, and proper epoxy coating for iron bodies to provide effective corrosion protection. -
Q: Can you provide valves with electric actuators for remote control?
A: Absolutely. We offer valve and actuator packages as a complete solution. You can specify your requirements for voltage (AC/DC), control signal (on/off, modulating), enclosure rating (IP67/IP68 for marine use), and fail-safe mode (spring return). -
Q: Do you offer customized face-to-face dimensions or special coatings?
A: While our standard valves comply with GB/T3036 dimensions for interchangeability, we can accommodate requests for special face-to-face lengths or advanced coatings like Rilsan or zinc-nickel plating upon request for specific project needs. -
Q: What is the typical delivery time for an order?
A: For standard sizes and materials, delivery time is generally 15-30 days after order confirmation. For larger sizes, special materials, or actuator packages, the lead time may be longer, which we will confirm upon quotation. -
Q: What testing do your valves undergo before shipment?
A> Our standard testing includes shell strength test, seat leakage test (typically using air or water per relevant standards), and operational torque test. Additional tests like fire-safe testing or NDT can be arranged upon request. -
Q: What documentation is provided with the shipment?
A> We provide a comprehensive package including commercial invoice, packing list, material certificates (MTC), test reports, and a detailed operation and maintenance manual. -
Q: How do I select the right seat material (EPDM, NBR, or PTFE)?
A> The choice depends on the fluid media and temperature. EPDM is suitable for water, steam, and mild chemicals. NBR is recommended for oils and fuels. PTFE offers the widest chemical resistance and higher temperature capability. Our technical team can assist you in selecting the optimal material.
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