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Help CenterGB/T Pneumatic Marine Gate Valve With Double Acting Actuator, DN50-DN200, PN1.6-4.0MPa
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As a professional valve manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our robust GB/T Pneumatic Marine Gate Valve series. Engineered for demanding marine and industrial environments, this valve integrates a reliable double-acting pneumatic actuator to deliver precise and automated flow control. Our commitment to stringent manufacturing standards ensures each valve offers durability, leak-tight sealing, and smooth operation, making it a trusted component for critical piping systems worldwide. With an annual export value reflecting our global reach, we provide solutions that meet the specific needs of markets across North America, Europe, Asia, and beyond.
This valve is designed for superior performance in isolating fluid flow in pipelines. The pneumatic actuation allows for remote operation, enhancing safety and efficiency in hard-to-reach or hazardous areas. Key features include:
- Robust Construction: The valve body is typically crafted from ductile iron or cast steel, offering excellent resistance to corrosion and mechanical stress, with stainless steel options for highly corrosive media.
- Efficient Double-Acting Actuator: The actuator uses air pressure to both open and close the valve, providing reliable bi-directional operation without the need for spring return, suitable for frequent cycling.
- Bubble-Tight Sealing: Utilizing advanced seat materials like PTFE or metal, the valve ensures zero leakage when closed, crucial for system safety and environmental protection.
- Easy Maintenance & Installation: A flanged connection design per international standards simplifies integration into existing piping networks. The modular actuator design allows for easy field servicing.
- Wide Compatibility: Suitable for handling water, oil, gas, and other neutral fluids in temperatures ranging from standard ambient to elevated levels, depending on material selection.
Below is a summary of key technical specifications for common models:
| Parameter | Specification / Option |
| Design Standard | GB/T (Chinese National Standard) |
| Nominal Diameter (DN) | 50, 65, 80, 100, 125, 150, 200 mm |
| Pressure Rating (PN) | 1.6 MPa, 2.5 MPa, 4.0 MPa |
| Actuator Air Supply | Standard: 0.4-0.7 MPa (Customizable) |
| Operation Temperature | -20°C to +200°C (Varies with seat/body material) |
| Flow Characteristic | Full bore, minimal pressure drop |
| Control Signal | On/Off via solenoid valve (Optional: positioner for modulating control) |
The primary advantage of choosing this pneumatic gate valve is the significant improvement in operational control and safety. For plant managers, it reduces manual labor and exposure to operational risks. For system designers, it offers a reliable, automatable component that integrates seamlessly into SCADA or PLC systems. The use of GB/T standards ensures compatibility with a wide range of industrial equipment, particularly in regions where these specifications are prevalent. Furthermore, the availability of different pressure ratings and sizes allows for precise matching to your system's requirements, optimizing performance and cost-efficiency.
Backed by our ISO9001 certification and nearly a decade of manufacturing expertise since 2016, Shanghai Zhibang guarantees product consistency and reliability. Our substantial annual export volume to diverse markets, including North America, Eastern Europe, Southeast Asia, and Africa, is a testament to the global acceptance of our quality valves. We support this with efficient logistics from major ports like Shanghai, Guangzhou, and Hong Kong. For engineers and procurement specialists seeking a dependable, automated valve solution that balances performance with value, our GB/T Pneumatic Marine Gate Valve is a proven choice. Contact us today to discuss your project specifications or to request a detailed quotation.
Frequently Asked Questions (FAQ):
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Q: What is the main difference between a double-acting and a single-acting actuator on this valve?
A: A double-acting actuator uses air pressure to both open and close the valve, requiring a continuous air supply for both actions. A single-acting (spring-return) actuator uses air to open and a spring to close, which can be beneficial for fail-safe closure. The double-acting type is generally preferred for frequent operation. -
Q: Can this valve be used for fluids other than water, such as oil or mild chemicals?
A: Yes. The valve's compatibility depends on the selected body and seat materials. Standard materials suit water, oil, and gas. For chemical services, we offer options like stainless steel bodies and PTFE or special alloy seats. Please provide fluid details for a material recommendation. -
Q: Is the valve suitable for underground installation or outdoor use?
A: The standard valve is designed for general industrial use. For outdoor or harsh environments, optional features like weatherproof or corrosion-resistant coatings on the actuator and extended stem designs are available upon request. -
Q: What accessories are typically needed for a complete automated valve package?
A> A typical package includes the valve, pneumatic actuator, solenoid valve for air control, limit switches for position indication, and an air filter regulator. We can supply all necessary accessories as a complete set. -
Q: What is the typical lead time for an order of these valves?
A: Lead time varies based on order quantity, size, and material specifications. Standard configurations in common sizes often have shorter lead times. We provide accurate delivery estimates upon order confirmation. -
Q: Do you provide custom modifications, such as different flange standards (ANSI, JIS)?
A> Yes, we offer customization. While the standard follows GB/T flanges, we can manufacture valves with ANSI, DIN, JIS, or other flange standards to meet your piping interface requirements. -
Q: How do I determine the correct size (DN) and pressure rating (PN) for my application?
A> You need to know your pipeline's nominal diameter and the maximum operating pressure and temperature of the system. Our technical team can assist in selection if you provide these parameters along with the fluid type. -
Q: What kind of after-sales support and warranty do you offer?
A> We provide technical documentation, installation guidance, and a standard warranty against manufacturing defects. Spare parts like seals and gaskets are also available for long-term maintenance support.
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