ANSI Carbon Steel Bellow Sealed Globe Valve
ANSI carbon steel bellow sealed globe valves are designed to provide zero-leakage performance in critical process applications. Using a metallic bellows as the stem sealing element, they prevent fugitive emissions and ensure safe, reliable flow control in high-pressure and high-temperature services.
Overview
Bellow sealed globe valves are control valves developed to eliminate stem leakage commonly associated with conventional packing seals. A welded metallic bellows provides a hermetic seal between the process fluid and the atmosphere, making these valves ideal for hazardous, toxic, or environmentally sensitive applications.
Design & Construction
- Robust globe valve body manufactured from ANSI-rated carbon steel
- Metallic bellows welded to the valve stem and bonnet
- Compact structure with precise flow control characteristics
- Secondary packing seal provided as a safety backup
Sealing Principle
- Bellows acts as the primary stem sealing element
- Prevents process fluid from contacting and eroding the valve stem
- Provides a true "positive valve seal" with physical isolation
- Effectively eliminates fugitive emissions
Performance Advantages
- Zero-leakage stem sealing
- High reliability under pressure and temperature fluctuations
- Reduced maintenance compared to conventional packed valves
- Extended service life in aggressive operating conditions
Environmental & Safety Benefits
Leakage from valve gland packings and flange joints is a major source of emissions in chemical and petrochemical plants. Bellow sealed globe valves significantly reduce these risks, supporting safer plant operation and compliance with environmental protection requirements.
Applications
- Chemical and petrochemical processing plants
- Oil and gas pipelines
- Steam and thermal oil systems
- Power generation facilities
- Processes handling toxic, hazardous, or high-purity fluids
Key Advantages
- Excellent leak-tightness
- Environmentally friendly design
- Accurate throttling and flow regulation
- Suitable for high-pressure and high-temperature services