Working Principle and Advantages of Globe Valves
Globe valves operate by pressing the valve disc firmly against the valve seat through the valve stem, effectively blocking fluid flow and achieving reliable shut-off. Compared to other valve types, globe valves offer the following advantages:
- Short stroke with excellent shut-off: The valve stem's linear movement allows for simple and efficient operation, ideal for frequent opening and closing.
- Minimal seal surface wear and easy maintenance: Once opened, the valve disc disengages from the seat, reducing mechanical wear on sealing surfaces.
- Suitable for both high and low-pressure systems: With stable structure and reliable sealing, globe valves perform well across a wide pressure range.
- Ease of maintenance: The valve disc and sealing components are easily replaceable without full disassembly, making it especially suitable for welded installations.
Typical Applications of Globe Valves
Globe valves are suitable for a variety of gaseous and liquid media, covering applications from standard to harsh industrial conditions. Typical uses include:
- Water and steam systems: widely used in hot and cold water supply, boiler systems, and steam pipelines.
- Air and gas control: ideal for opening and closing non-corrosive gases such as compressed air, nitrogen, and oxygen.
- Corrosive fluids: when equipped with appropriate body and sealing materials, applicable for acidic, alkaline, or chloride-containing media.
- Oil transportation: suitable for distribution systems involving lubricants, fuel oil, and other petrochemical fluids.
- Slurry and particulate-laden fluids: compact structure and strong closing force help prevent backflow or leakage.
- Radioactive or toxic media: used in nuclear power and chemical industries to ensure safe and sealed operation.
Different Types of Globe Valves and Their Application Differences
1. Angle Globe Valve
Ideal for installations with limited space or where a 90-degree pipeline turn is required; offers lower pressure loss compared to straight-through types.
2. Straight-Through or Y-Type Globe Valve
Features a smoother flow path with reduced fluid resistance, making it suitable for high-pressure or high-temperature systems demanding minimal pressure drop.
3. Plunger Globe Valve
Provides strong sealing performance, suited for frequent operation and applications requiring tight shut-off; some models also support flow regulation.
Application Notes and Recommendations
Although globe valves have a wide range of applications, caution or avoidance is advised in the following situations:
- Not suitable for media containing suspended solid particles to prevent damage to the sealing surface.
- Systems requiring extremely low flow resistance, as globe valves inherently have relatively higher flow resistance due to their structure.
- Reverse flow applications require special design; standard globe valves are recommended for unidirectional use, and for bidirectional sealing, valves with special structures should be selected.
Conclusion
Globe control valves, with their excellent sealing performance and precise control capabilities, have become indispensable key components in fluid control systems. Selecting the appropriate design and materials based on specific operating conditions can significantly enhance system efficiency and safety. If you need further technical support during the selection process, our team is ready to provide you with professional solutions.
