SF6 Gas Series Insulation Part
22 April, 2026
Premium insulation components for SF6 Gas Insulated Switchgear (GIS) and Ring Main Units (RMU). Featuring ultra-low leakage rates, high mechanical strength, and superior SF6 resistance.
Modern power distribution demands compact, maintenance-free, and weather-independent solutions. Our Gas Insulation Series is engineered for SF6 Gas Insulated Switchgear (GIS) and Ring Main Units (RMU) ranging from 12kV to 40.5kV. Unlike air insulation, gas insulation components must serve a dual purpose: providing electrical isolation and acting as a critical pressure barrier. We utilize specialized epoxy resin formulations compatible with SF6 gas and advanced Helium Leak Detection processes to ensure every component maintains a hermetic seal for its entire service life.
Critical Interfaces for Sealed Systems: Engineered as the heart of C-GIS and RMU tank systems, these high-precision components—including Switch and Spout Bushings—utilize specialized epoxy formulations to guarantee zero-leakage hermetic sealing and superior resistance to SF6 decomposition products over decades of service.
Secure Your Supply Chain Looking for high-precision components for your GIS production? Please fill out the inquiry form on the right to discuss your technical requirements.👉
Our components are tested to achieve an air leakage rate of less than 1×10⁻⁹ Pa·m³/s (using Helium Mass Spectrometry). This ensures that the assembled GIS unit meets the international standard of an annual relative leakage rate of < 0.1%, guaranteeing a service life of over 30 years.
Our standard Gas Insulation Series is designed to operate safely at a rated SF6 gas pressure of 0.04 MPa to 0.05 MPa (gauge pressure). They typically undergo burst pressure tests exceeding 3x the operating pressure to ensure safety margins during overpressure events.
Yes. We use a specialized Alicyclic Epoxy Resin formulation tailored for GIS applications. It demonstrates excellent chemical stability against Fluorides and other corrosive byproducts generated by arc quenching in SF6, preventing surface degradation.
While primarily designed for Gas Insulated Switchgear (C-GIS) and RMUs where the part forms a gas barrier, some components can be adapted for solid insulation cabinets. However, please specify your application so we can recommend the correct "Air Series" or "Gas Series" product.
Yes. Because gas tightness relies on the perfect bonding between the metal insert and the resin, we perform X-Ray flaw detection to ensure there are no gaps or cracks at the interface, which are common causes of slow gas leaks.
