QTHS-3-1000
1000m³h SF6 Vacuum Evacuation System
The SF6 Vacuum Evacuation System (1000 m³/h) is designed for high-capacity vacuum evacuation of large gas-insulated electrical equipment, including GIS, GIL, and high-voltage circuit breakers. The unit is used to evacuate air, moisture, and non-condensable gases from gas compartments prior to SF6 gas filling during installation, commissioning, and maintenance operations.
The system adopts a dual-stage vacuum configuration combining a rotary vane vacuum pump and a Roots blower, enabling rapid pump-down performance and stable deep vacuum operation. Its robust design ensures reliable operation under demanding substation and field service conditions.
The SF6 Vacuum Evacuation System (1000 m³/h) is designed for high-efficiency evacuation of large SF6 gas compartments used in GIS and other gas-insulated electrical equipment. The system adopts a dual-stage vacuum configuration combining a rotary vane pump and a Roots blower, enabling rapid pump-down to an ultimate vacuum level of ≤1 Pa while effectively removing moisture and non-condensable gases.
This model is particularly suitable for installation, commissioning, and maintenance operations requiring fast evacuation performance and stable vacuum reliability.
In addition to the 1000 m³/h configuration, YUNENG also offers evacuation systems with capacities such as 250 m³/h and 500 m³/h, as well as customized solutions tailored to specific project requirements.
| Item | Name of Parameter | Unit | QTHS-3-1000 |
| Technical parameters | Type | / | Mobile |
| Working temperature | ℃ | -20℃～50℃ | |
| Ultimate vacuum of vacuum pump unit | Pa | ≤1 | |
| Pumping rate | m3/H | ≥1000 | |
| Measuring range of vacuum gauge | Pa | 0-100000 (Absolute pressure) | |
| The vacuuming time to 1mbar for a container with a volume of 1m³ and an initial pressure of 1bar | mins | ≤8 | |
| The vacuuming time to 0.2mbar for a container with a volume of 1m³ and an initial pressure of 1bar | mins | ≤30 | |
| Number of evacuation interface groups | / | 1 | |
| Size of evacuation interface | DN | 20 | |
| Working power | / | As per buyer’s option | |
| Dimension for reference | mm | 1300*850*1350 | |
| Total power | kW | ≤8 | |
| Weight for reference | Kgs | 540 | |
| *Due to different equipment configurations, its dimensions, weight and gas treatment indexes will vary slightly. | |||
1. High Pumping Efficiency
A dual-stage vacuum system integrating a rotary vane pump and Roots blower provides fast evacuation speed and achieves deep vacuum levels up to ≤1 Pa, significantly reducing preparation time before gas filling.
2. Stable and Reliable Operation
Designed for continuous operation in large-capacity evacuation tasks, ensuring consistent vacuum performance for GIS and large SF6 gas compartments.
3. Oil Backflow Protection
Equipped with anti-backflow protection devices to prevent vacuum pump oil contamination and ensure safe operation of gas-insulated equipment.
4. Clear and Simple Operation
An integrated control system with intuitive operation interface enables easy monitoring of vacuum level and system status.
5. Mobile and Field-Ready Design
A compact skid-mounted structure with mobility features allows convenient use in substations and on-site maintenance environments.
- Vacuum evacuation of GIS (Gas Insulated Switchgear) systems
- Evacuation of GIL (Gas Insulated Transmission Lines)
- Vacuum preparation before SF6 gas filling during equipment installation
- Maintenance and overhaul of high-voltage SF6-insulated equipment
- Vacuum drying and degassing of large gas compartments in substations
