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Help CenterGB/T3037-94 Compliant Marine Butterfly Valve With Mill Test Report
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As a professional manufacturer of industrial valves since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our high-performance marine butterfly valve, engineered specifically for demanding shipbuilding and offshore applications. This valve is meticulously designed and manufactured to comply with the stringent GB/T3037-94 standard, ensuring reliability and safety in critical marine systems. We understand the unique challenges of the marine environment, including corrosion, pressure fluctuations, and space constraints, which is why our valve is built to deliver exceptional sealing performance, durability, and ease of operation. With an annual export value reflecting our global reach and commitment to quality, we provide a robust solution for seawater cooling, ballast, firefighting, fuel, and bilge systems on various vessels and offshore structures. Our product comes with a comprehensive Mill Test Report, offering full traceability and peace of mind for engineers and procurement specialists.
Core Design & Technical Specifications: Our marine butterfly valve is a quarter-turn rotary motion valve designed for efficient flow control. The disc, mounted on a rotating shaft, provides a tight shut-off or modulation of fluid flow. The design prioritizes compactness and lightweight construction, which is crucial for space-saving installations onboard ships.
- Standard Compliance: Full conformity with GB/T3037-94, the Chinese national standard for shipbuilding butterfly valves, covering design, materials, manufacturing, testing, and inspection requirements.
- Robust Construction: Available in a variety of body and disc materials to suit specific service conditions, including seawater, oils, and chemicals. Common combinations include cast iron/cast steel body with stainless steel disc or full stainless steel/duplex steel construction for highly corrosive media.
- Superior Sealing: Features a resilient seat (EPDM, NBR) or PTFE/metal seat for high-temperature applications, ensuring bubble-tight shut-off and long service life even with abrasive media.
- Versatile Actuation: Can be supplied with a manual lever, gear operator for higher torque applications, or automated with electric or pneumatic actuators for remote control and integration into ship automation systems.
- Connection Flexibility: Offered in wafer, lug, or flanged end connections to match existing piping systems, simplifying installation and replacement.
The table below outlines key specifications for common configurations:
| Parameter | Specification Range |
| Size (DN) | 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600+ |
| Pressure Rating | PN10, PN16, PN25 / Class 150, Class 300 |
| Body Material | Cast Iron (GG25), Carbon Steel (WCB), Stainless Steel (CF8/CF8M), Duplex Steel |
| Seat Material | EPDM (for water), NBR (for oil), PTFE (for chemicals), Metal |
| Temperature Range | -20°C to +120°C (for resilient seat), up to +400°C (for metal seat) |
Advantages & Client Benefits:
- Enhanced System Reliability: Compliance with GB/T3037-94 guarantees the valve meets the specific performance and safety criteria for marine use, reducing the risk of in-service failure and associated downtime or safety hazards.
- Streamlined Procurement & Approval: The provided Mill Test Report (MTR) documents chemical composition, mechanical properties, and non-destructive testing results for all critical components. This facilitates quality verification and simplifies the approval process with shipyards, classification societies, and end clients.
- Cost-Effective Maintenance: The simple, robust design allows for easy inspection and maintenance. Seat and seal replacement can often be performed without removing the valve body from the pipeline, minimizing maintenance time and costs.
- Optimized Space and Weight: Compared to gate or globe valves, the butterfly valve design offers a significantly more compact and lighter solution, contributing to overall weight savings and more efficient use of limited space within vessel engine rooms and pipe racks.
- Global Supply Chain Support: With shipment capabilities from major ports like Shanghai, Guangzhou, and Hong Kong, we ensure timely and efficient delivery to shipyards and projects worldwide, including key markets in North America, Europe, Southeast Asia, and the Middle East.
Backed by our ISO9001 certified quality management system and nearly a decade of manufacturing expertise since 2016, Shanghai Zhibang Valve delivers products that meet rigorous international standards. Our consistent annual export performance demonstrates our reliability as a global supplier. We invite you to leverage our engineering support to select the optimal valve configuration—considering material compatibility, pressure rating, actuation method, and connection type—for your specific marine application. Contact us today for a detailed quotation, technical datasheets, or to discuss custom requirements. Ensure the integrity of your marine piping systems with a valve built to a recognized standard and backed by full material traceability.
Frequently Asked Questions (FAQ):
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Q: What is the significance of the GB/T3037-94 standard for this valve?
A: GB/T3037-94 is the Chinese national standard specifically for shipbuilding butterfly valves. Compliance ensures the valve's design, materials, manufacturing process, pressure testing, and performance are suitable for the harsh and safety-critical marine environment, often a mandatory requirement for shipyard projects. -
Q: What exactly is included in the Mill Test Report (MTR)?
A: The MTR is a certified document from the material manufacturer. It typically includes the heat/charge number, chemical analysis, mechanical property test results (tensile strength, yield strength, elongation), and often results of non-destructive tests for the valve's body, disc, and stem materials, providing full traceability. -
Q: Can this valve be used with seawater?
A: Yes, absolutely. For seawater service, we recommend specific material combinations such as a cast steel or duplex steel body with a stainless steel (316/316L) or duplex steel disc, paired with an EPDM seat. This combination offers strong resistance to corrosion from saltwater. -
Q: What are the main differences between wafer and lug-type butterfly valves?
A: Wafer-style valves are designed to be clamped between two pipe flanges. Lug-style valves have threaded inserts (lugs) on the valve body, allowing them to be bolted directly to each flange, which permits the downstream side to be disconnected for maintenance without removing the entire valve—a useful feature for some system designs. -
Q: Is the valve suitable for automated control systems?
A: Yes. While available with manual lever or gear operation, this valve can be easily fitted with electric or pneumatic actuators. We can supply the actuator as a complete package or provide valves prepared for actuator mounting, facilitating integration into ship automation and remote control systems. -
Q: What is your lead time for standard sizes?
A: Lead times vary based on size, material, and quantity. Standard configurations in common sizes often have shorter production cycles. We provide accurate lead time estimates upon receipt of your detailed inquiry to ensure it aligns with your project schedule. -
Q: Do you offer customization beyond the standard specifications?
A: We have engineering capabilities to address specific requirements. This can include special coatings (e.g., epoxy), extended stems, locking devices, different face-to-face dimensions, or modifications to meet other specific classification society rules. Please inquire with your detailed needs.
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