Bellows Sealed Globe Valve

Overview:

The Bellows Sealed Globe Valve is designed to provide highly reliable and long-lasting performance, particularly in critical industrial applications where leakage prevention is essential. The valve features a bellows seal that prevents fluid leakage, offering enhanced safety and environmental protection. This type of valve is commonly used in industries such as chemical processing, power generation, oil and gas, and pharmaceuticals.

Product Features:

1. Bellows Sealed Design:
   • The valve is equipped with a metal bellows seal, which ensures a hermetic seal between the valve stem and the bonnet, eliminating the risk of leakage from the stem area.
   • The bellows are made from high-grade stainless steel, providing excellent resistance to high pressure and temperature conditions, as well as corrosion and fatigue.
2. Globe Valve Function:
   • Linear motion design for precise flow control. Globe valves are ideal for throttling applications and are typically used where the valve needs to be fully open or fully closed, as well as for flow regulation.
   • Tight shutoff capability ensures minimal leakage when the valve is fully closed.
3. Reliable and Safe:
   • The double-sealing system consists of the bellows seal and a backup packing seal. Even if the bellows fail, the packing prevents external leakage.
   • This dual protection makes the valve suitable for handling hazardous, toxic, or radioactive fluids.
4. Extended Service Life:
   • The bellows design prevents stem wear and reduces the need for frequent maintenance. The welded end of the bellows enhances the mechanical strength and minimizes the chance of failure.
   • The valve is designed for high cycle life, with the bellows capable of withstanding numerous opening and closing cycles.
5. Corrosion and High-Temperature Resistance:
   • The valve body and internals can be made from various materials, including stainless steel, carbon steel, and alloy steels, ensuring suitability for a wide range of fluids and operating conditions, including high-temperature and corrosive environments.
   • Typically suitable for temperatures ranging from -29°C to 400°C depending on the material selection.
6. Flanged or Threaded Connections:
   • Available with flanged ends (ANSI, DIN, or JIS standards) or threaded connections for easier installation and removal.
   • Face-to-face dimensions conform to industry standards for easy replacement of existing valves.
7. Minimal Maintenance:
   • The non-rotating stem design reduces wear and tear, while the bellows seal minimizes the need for frequent packing adjustments or replacements, making this valve highly low-maintenance.
8. Manual and Automated Options:
   • Available in manual, electric, or pneumatic actuation configurations. Electric and pneumatic actuators provide the option for automated operation in larger systems.

Applications:

1. Chemical and Petrochemical Industries:
   • Ideal for handling toxic, corrosive, or volatile substances, such as acids, solvents, and gases. The bellows seal ensures no external leakage, making it safe for critical processes.
2. Power Generation:
   • Used in boiler feedwater systems, steam and condensate systems, where reliability and high-temperature resistance are essential.
3. Oil and Gas Industry:
   • Suitable for use in refineries, gas processing plants, and other installations that handle hydrocarbons and volatile organic compounds (VOCs).
4. Pharmaceutical and Food Processing:
   • Ensures a clean and safe environment, preventing any leakage that could contaminate the process fluid or surroundings.
5. Nuclear and Other Critical Applications:
   • Used in nuclear power plants or other highly regulated industries where safety is a top priority.

Advantages:

• Zero Stem Leakage: The bellows seal prevents any leakage through the stem, enhancing operational safety and protecting the environment.
• High Durability: Long service life due to the non-rotating stem and wear-resistant bellows.
• Safety Assurance: Dual sealing system ensures safe operation even in case of bellows failure.
• Wide Application Range: Can handle a variety of fluids, including corrosive, high-pressure, and high-temperature media.
• Environmental Protection: Leak-proof design minimizes the risk of environmental contamination.

Conclusion:

The Bellows Sealed Globe Valve is a highly reliable valve solution designed for critical applications where fluid containment is essential. Its robust construction, long service life, and dual-sealing design make it an ideal choice for industries that demand both high performance and safety, particularly when handling hazardous or sensitive media. Whether used for flow control or shutoff, this valve ensures excellent sealing performance and reduced maintenance.