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Help CenterGB/T3037-94 Lug Type Marine Butterfly Valve Wafer Lug Design Single Side Disassembly Available
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Shanghai Zhibang Valve Manufacture Co., Ltd. presents our high-quality GB/T3037-94 Lug Type Marine Butterfly Valve, designed with a wafer lug configuration and the unique advantage of single side disassembly. As a specialized manufacturer since 2016, we combine over 8 years of production experience with strict ISO9001 quality management to deliver valves that meet the demanding requirements of marine and industrial applications. Our lug type butterfly valve offers reliable shut-off, easy maintenance, and long service life, making it a preferred choice for engineers and procurement professionals worldwide.
This valve is engineered to comply with Chinese national standard GB/T3037-94, ensuring dimensional interchangeability and performance consistency. The lug design allows for dead-end service and single side disassembly, meaning you can remove the downstream piping without affecting the valve body or upstream connections. This feature significantly reduces downtime and maintenance costs. Whether you need a manual lever for quick operation or an actuator for automated control, our valve is customizable to fit your system requirements.
Key Features & Benefits
- Lug Type Design: Threaded inserts allow the valve to be bolted directly to flanges, enabling dead-end service and single side disassembly without draining the entire system.
- Marine Grade Construction: Suitable for seawater, freshwater, and other marine environments, with optional corrosion-resistant materials and coatings.
- Compliance with GB/T3037-94: Ensures strict adherence to Chinese national standards, facilitating integration into projects requiring this specification.
- Bubble-tight Shut-off: Resilient seat design provides zero leakage at rated pressure, enhancing system safety and efficiency.
- Bi-directional Sealing: Capable of handling flow in both directions, offering flexibility in piping layout.
- Low Torque Operation: Optimized disc profile reduces operating torque, allowing for smaller actuators and lower energy consumption.
- Easy Maintenance: Single side disassembly enables quick replacement of seat or disc without removing the valve from the pipeline.
- Wide Range of Materials: Body and disc available in cast iron, ductile iron, carbon steel, stainless steel, with seat options including EPDM, NBR, PTFE, and Viton.
Technical Specifications
| Parameter | Details |
|---|---|
| Standard | GB/T3037-94 |
| Size Range | DN50 - DN600 (2" - 24") |
| Pressure Rating | PN10 / PN16 / ANSI 150 |
| Body Material | Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel |
| Disc Material | Ductile Iron, Stainless Steel (CF8, CF8M), with optional coating |
| Seat Material | EPDM, NBR, PTFE, Viton |
| Temperature Range | -20°C to +120°C (depending on seat material) |
| Operation | Manual Lever, Gearbox, Pneumatic Actuator, Electric Actuator |
| Face-to-Face Dimension | Per GB/T3037-94 or API 609 (optional) |
| Leakage Rate | Zero leakage (bubble-tight) at rated pressure |
The GB/T3037-94 Lug Type Marine Butterfly Valve is designed for a wide range of applications including marine systems, water treatment, HVAC, chemical processing, and general industrial piping. Its robust construction and reliable sealing ensure minimal maintenance and extended service life. The single side disassembly feature is particularly beneficial in confined spaces where full valve removal is impractical.
Why Choose Shanghai Zhibang Valve?
- Established in 2016, we are a professional manufacturer with ISO9001 certification, ensuring consistent quality control.
- Annual export value of US$1 million to US$1.5 million, serving clients across North America, South America, Europe, Asia, Africa, and Oceania.
- Flexible shipping options from Shanghai, Guangzhou, Hongkong, and Beijing ports, with global logistics support.
- We offer customization in materials, coatings, and actuation to meet specific project requirements.
- Our valves have been tested and proven in marine environments, with positive feedback from shipbuilders and EPC contractors.
- Dedicated after-sales service and technical support, with a team of experienced engineers ready to assist.
Trust in our product: With over 8 years of manufacturing experience and a strong track record in international markets, Shanghai Zhibang Valve is your reliable partner for industrial valves. We invite you to contact us for a quotation, technical datasheet, or sample. Our team is committed to providing high-quality products that meet your specifications and delivery schedules.
Frequently Asked Questions (FAQ)
-
Q: What does GB/T3037-94 refer to?
A: GB/T3037-94 is a Chinese national standard for lug type butterfly valves, specifying dimensions, pressure ratings, materials, and testing requirements. It ensures interchangeability and compatibility with other standard components. -
Q: Can this valve be used for dead-end service?
A: Yes, the lug design with threaded inserts allows the valve to be installed at the end of a pipeline for dead-end service, and it supports single side disassembly without disturbing the opposite flange. -
Q: Is single side disassembly really possible without draining the line?
A: The single side disassembly feature means you can remove the downstream piping or the valve internal components from one side while the valve remains bolted to the upstream flange. However, for complete maintenance, the line may need to be depressurized. Always follow safety procedures. -
Q: What materials are available for the seat?
A: We offer EPDM, NBR, PTFE, and Viton seats. Each material provides different temperature and chemical resistance properties. EPDM is suitable for water and mild chemicals, PTFE for corrosive media, and Viton for high-temperature or aggressive fluids. -
Q: What actuation options do you provide?
A: We offer manual lever, gearbox, pneumatic actuator, and electric actuator. Actuators can be supplied with positioners, limit switches, and solenoid valves as needed. For marine applications, we recommend corrosion-resistant materials for actuators. -
Q: How do I ensure the valve is suitable for seawater?
A: For marine use, we recommend a ductile iron body with an epoxy coating or a stainless steel disc, and an EPDM seat. Optional materials like bronze or nickel-aluminum bronze are also available upon request. Please consult our technical team for specific recommendations. -
Q: Do you provide test certificates?
A: Yes, we provide material test certificates, pressure test reports, and a certificate of conformity. Our valves are tested per ISO5208 or API 598 standards. Additional third-party inspections can be arranged. -
Q: What is the typical lead time?
A: For standard sizes and materials, lead time is 15-30 days after order confirmation. Custom orders may require 30-45 days. We work with efficient logistics to meet your project deadlines.
Contact us today to discuss your project requirements. Shanghai Zhibang Valve Manufacture Co., Ltd. is ready to provide you with a reliable, cost-effective solution for your marine and industrial piping needs.
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