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High-Quality Vacuum Interrupter Bellows from China Suppliers | Durable Factory Components for Electrical Switchgear
Product Description
Through optimized waveform structural parameters in the design phase, engineers enable the bellows to achieve maximum stroke within confined spaces while maintaining reliable sealing performance. This innovative design establishes a robust dynamic sealing barrier inside the vacuum interrupter chamber, effectively sustaining an ultra-high vacuum environment at 10^-8 Pa level to facilitate rapid arc quenching.
During actual operation, the bellows must simultaneously withstand multiple extreme conditions: absorbing mechanical shocks from breaker operating mechanisms, compensating for thermal expansion/contraction caused by current-switching temperature fluctuations, and resisting electromagnetic vibrations induced by arcing. To meet these challenges, specialized annealing and surface treatment processes are implemented during manufacturing, significantly enhancing the material's tensile strength and corrosion resistance.
Quality Assurance
For quality assurance, each bellows undergoes over twenty rigorous tests including helium mass spectrometry leak detection and fatigue life testing, ensuring leakage rates remain below the international standard of 1×10^-10 Pa·m³/s.
Applications & Customization
While traditionally applied in 12kV-40.5kV medium-voltage circuit breakers, customized solutions are available for EHV equipment through multilayer convolution designs or specialized materials. With smart grid development, modern bellows now integrate displacement sensing to monitor contact wear in real time, enabling predictive maintenance.
Next-Gen Performance
Through material formulation optimization and protective coating upgrades, next-generation products maintain stable performance across extreme temperatures (-40°C to +150°C) while resisting coastal salt spray corrosion or industrial chemical erosion.
This high-performance component - integrating materials science, mechanical engineering and vacuum technology - continues driving electrical switchgear toward greater reliability, compactness and intelligence, serving as a foundational element for smart grid infrastructure.
Specification
| Wuxi Jindu Bellows Co.,Ltd Specification Range | |||
| ID (inner diameter) | OD (outside diameter) | ID (inner diameter) | OD (outside diameter) |
| Ø10.0 | Ø18.0 | Ø37.0 | Ø53.0 |
| Ø13.0 | Ø22.0 | Ø38.0 | Ø52.0 |
| Ø17.5 | Ø32.0 | Ø38.0 | Ø54.5 |
| Ø20.5 | Ø32.0 | Ø38.1 | Ø53.0 |
| Ø22.0 | Ø32.0 | Ø40.0 | Ø53.7 |
| Ø23.0 | Ø35.0 | Ø40.0 | Ø60.0 |
| Ø24.0 | Ø36.0 | Ø42.4 | Ø57.0 |
| Ø25.0 | Ø40.0 | Ø43.0 | Ø60.0 |
| Ø25.5 | Ø38.0 | Ø46.0 | Ø66.0 |
| Ø27.5 | Ø38.0 | Ø48.0 | Ø66.0 |
| Ø28.0 | Ø40.0 | Ø48.0 | Ø66.2 |
| Ø28.1 | Ø41.0 | Ø50.0 | Ø65.4 |
| Ø30.0 | Ø42.0 | Ø50.5 | Ø67.0 |
| Ø30.1 | Ø43.5 | Ø55.0 | Ø80.0 |
| Ø30.7 | Ø43.7 | Ø57.0 | Ø75.0 |
| Ø30.7 | Ø45.0 | Ø60.0 | Ø86.0 |
| Ø32.0 | Ø46.0 | Ø65.0 | Ø88.0 |
| Ø33.0 | Ø45.0 | Ø73.0 | Ø105.0 |
| Ø34.0 | Ø50.0 | Ø81.0 | Ø105.0 |
| Ø35.0 | Ø50.0 | Ø92.4 | Ø118.0 |
| Ø36.0 | Ø50.0 | Ø155.0 | Ø181.0 |
Frequently Asked Questions
What vacuum level can the bellows maintain?
The bellows are designed to establish a robust dynamic sealing barrier that effectively sustains an ultra-high vacuum environment at the 10^-8 Pa level, facilitating rapid arc quenching.
What extreme operating conditions can these bellows withstand?
They are engineered to simultaneously withstand mechanical shocks from breaker mechanisms, thermal expansion/contraction due to current-switching temperature fluctuations (-40°C to +150°C), electromagnetic vibrations, and environmental challenges like coastal salt spray or industrial chemical erosion.
How is the quality and leak tightness of the bellows verified?
Each bellows undergoes over twenty rigorous tests, including helium mass spectrometry leak detection and fatigue life testing. This ensures that the leakage rates remain strictly below the international standard of 1×10^-10 Pa·m³/s.
Are customized solutions available for Extra-High Voltage (EHV) equipment?
Yes. While traditionally applied in 12kV-40.5kV medium-voltage circuit breakers, customized solutions for EHV equipment are available through specialized materials or multilayer convolution designs.
How do the bellows support smart grid and predictive maintenance systems?
Modern bellows integrate displacement sensing technology, which monitors contact wear in real time. This dynamic tracking enables predictive maintenance capabilities essential for smart grid infrastructure.