ZJ-70
250m3/h Compact Onsite Transformer Vacuum Pump | Vacuum Evacuation System
- The YUNENG ZJ-70 150m³/h Compact Onsite Transformer Vacuum Pump is a high-performance vacuum evacuation system designed for power transformer vacuum drying, evacuation, oil filling, and maintenance.
- With a 70 L/s pumping speed and ≤3 Pa ultimate vacuum, it provides fast and stable air extraction to establish the high-vacuum conditions required for transformer installation and servicing.
- The system is suitable for transformer manufacturers, power utilities, substations, and maintenance contractors, including applications involving high-voltage power transformers and on-site vacuum processing.
Specification of 250m3/h Compact Onsite Transformer Vacuum Pump
The ZJ-70 is a compact and mobile vacuum unit designed for on-site maintenance of small and medium-sized transformers up to 110 kV. It features a small footprint and light weight, allowing easy transportation and operation in narrow outdoor substations and remote working sites.
It provides stable and consistent vacuum performance for onsite drying and transformer evacuation procedures. By equipping with a dedicated GIS vacuum interface, which can be used to perform complete and reliable SF6 vacuum evacuation for gas insulated switchgear.
| Item | Name of Parameter | Unit | ZJ-70 |
| Technical parameters | Pumping rate | L/s | 70 |
| Limit vacuum | Pa | ≤3 | |
| Pumping level | / | 2 | |
| Working power | / | AC380V 50Hz,3P or as per buyer’s option | |
| Total power | kW | 4 | |
| Vacuum connection | DN | 25 | |
| Size | mm | 1200*950*1600 | |
| Weight | kg | 350 | |
| *Due to different equipment configurations, its dimensions, weight will vary slightly. | |||
Advantages of 250m3/h Compact Onsite Transformer Vacuum Pump
1. Compact & Mobile Design
Lightweight and small in size, the unit is easy to transport and deploy without heavy lifting equipment, ideal for frequent onsite service.
2. Stable Two-Stage Vacuum System
The two-stage pumping structure ensures steady vacuum level and consistent output, guaranteeing reliable and repeatable treatment results.
3. Low Energy Consumption
Optimized power design reduces energy consumption and operating costs, supporting long-term continuous field operation.
4. Simple & Intuitive Operation
User-friendly control layout minimizes training time and reduces operational errors for field technicians.
5. Low Maintenance Cost
Robust structure and easily accessible components simplify daily inspection and maintenance, lowering long-term operating costs.
Application of 250m3/h Compact Onsite Transformer Vacuum Pump
1. On-Site Vacuum Drying for 220 kV Transformers
Removes moisture and gas from insulation materials to avoid air and moisture contamination before oil filling.
2. Routine Transformer Maintenance
Used for regular overhaul, fault repair, and performance restoration of small and medium transformers.
3. Small Substation Commissioning
Provides reliable vacuum support for installation, testing, and commissioning of substation equipment.
4. GIS Equipment Vacuum Evacuation
With dedicated GIS interface, it performs standardized vacuum processing for GIS installation and maintenance.
