Bellow Seal Globe Valve Description
Bellows sealed globe valve is a kind of globe valve using metal bellows instead of traditional packing, through the bellows expansion and contraction to compensate for the stem movement, to achieve the stem dynamic sealing zero leakage, dedicated to toxic, flammable or high purity media in harsh working conditions.
Advantages
Zero leakage safety
The bellows dynamic seal completely eliminates the risk of valve stem leakage and meets the SIL3 safety level.
Maintenance-free design
The bellows life is ≥10,000 operations, reducing maintenance costs by more than 60%.
Corrosion and high temperature resistance
316L bellows + carbide sealing surface, withstanding extreme working conditions of -29℃~540℃.
Low operating torque
The bellows compensates for thermal expansion and contraction, and the opening and closing torque is 40% lower than that of ordinary stop valves
Bellow Seal Globe Valve Specification
|
Items |
Standard | Core Requirements |
|---|---|---|
| Design and Manufacturing | API 600 / ASME B16.34 | Covering pressure-temperature rating and bellows fatigue life requirements |
| Pressure Level | Class 150～2500 | High-pressure models (such as Class 900) require butt welding connections |
| Connection Standards | ASME B16.5(Flange) | or ASME B16.11 (socket weld) |
| Material Specifications | ASTM A182 F316L(Bellow Seal) | Valve body forgings must comply with ASTM A105/A182 |
| Test Standards | API 598 / MSS SP-134 | Helium leak test, sealing test pressure ≥ 1.1 times the nominal pressure |
Bellow Seal Globe Valve
Applications
- High-risk media control
Chemical industry: Control the transportation of highly toxic/corrosive media such as chlorine and liquid ammonia.
The bellows seal completely eliminates the risk of valve stem leakage and protects personnel and environmental safety.
Petrochemical industry: Used in sulfur-containing oil and gas pipelines and ethylene cracking units, it can withstand high-pressure corrosive hydrocarbon media and avoid fire hazards caused by packing seal failure.
- High-temperature fluid system
Heat transfer oil circulation: Replace the packing valve in the 425℃ high-temperature heat transfer oil pipeline to solve the leakage problem caused by high-temperature pulverization of graphite packing (the permeability is 50 times that of steam).
Steam energy system: The main steam pipeline of the thermal power plant (≤540℃/100MPa) achieves zero leakage; Nuclear power cooling water system ensures the integrity of radiation protection.
- Clean and sterile environment
Pharmaceutical industry: Control water for injection and sterile solvents to meet GMP clean requirements and prevent microbial contamination.
- Food and beverage: Transport sanitary media such as milk and juice, with a dead-angle design to avoid residues, in line with FDA/3A certification. Extreme working conditions
Industrial gas: Liquid oxygen/liquid nitrogen storage tank (-196℃) pipeline control, bellows compensate for low temperature shrinkage to prevent seal failure.
Environmental water treatment: Hydrochloric acid and sodium hydroxide reagent addition system, acid and alkali corrosion resistant design extends valve life by more than 3 times.
- Energy security node
Power station hydrogen cooling system: Generator hydrogen seal control, bellows double seal to block hydrogen leakage (such as 25FJ-1.6P valve)
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