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High-Quality Vacuum Interrupter Bellows from China Suppliers - Durable Factory-Made Components for Power Systems
Product Description
Optimized Design & Sealing
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.
Resilience to Extreme Conditions
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. Specialized annealing and surface treatment processes significantly enhance material tensile strength and corrosion resistance.
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.
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.
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 do Wuxi Jindu bellows maintain?
Our bellows effectively sustain an ultra-high vacuum environment at the 10^-8 Pa level inside the vacuum interrupter chamber, ensuring rapid and reliable arc quenching.
What extreme environmental conditions can these bellows withstand?
They are built to operate reliably across extreme temperatures ranging from -40°C to +150°C and are highly resistant to coastal salt spray corrosion, industrial chemical erosion, mechanical shocks, and electromagnetic vibrations.
How is the quality and leak-tightness of the bellows tested?
Each bellows undergoes over twenty rigorous tests, including helium mass spectrometry leak detection and fatigue life testing. This ensures that leakage rates remain strictly below the international standard of 1×10^-10 Pa·m³/s.
Can these bellows be customized for EHV (Extra-High Voltage) applications?
Yes. While standard solutions are designed for 12kV-40.5kV medium-voltage circuit breakers, we provide customized solutions for EHV equipment using multilayer convolution designs and specialized materials.
How do the bellows support smart grid predictive maintenance?
Modern bellows feature integrated displacement sensing to monitor contact wear in real time, allowing for predictive maintenance and enhanced electrical switchgear reliability.