EN
GSH-NNA-30/250-400 SF6 Gas Reclaiming System | SF6 Recovery Purification Machine
GSH-NNA-30/250-400 heavy-duty SF6 gas recovery unit: 30m³/h recovery rate, 250m³/h high-capacity vacuum, 400kg liquefied storage. Integrates recovery, vacuum, deep purification, liquefaction and refilling. PLC auto control, multi-stage safety protection. Mobile industrial design for large GIS & EHV switchgear.
- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
GSH-NNA-30/250-400 is a heavy-duty industrial-grade SF₆ gas handling system designed for large-scale power utilities, switchgear manufacturing plants, EPC contractors and third-party testing institutions. It is dedicated to high-efficiency SF₆ gas recovery, deep vacuumizing, multi-stage purification, compression liquefaction, large-capacity storage and pressure-regulated refilling during installation, major maintenance and decommissioning of 110kV ~ 500kV large-capacity GIS, EHV SF₆ circuit breakers, instrument transformers and gas-insulated busbars.
It adopts a two-stage oil-free SF₆ dedicated compressor with positive & negative pressure recovery mode, achieving a recovery rate of 30m³/h and final recovery pressure as low as ≤10kPa, minimizing residual gas emission. The 250m³/h high-capacity dual-stage rotary vane vacuum pump ensures deep vacuum degree ≤5Pa, fully meeting the strict vacuum requirements of high-voltage gas-insulated equipment. The multi-stage deep purification system includes high-efficiency particle filters, molecular sieve dryers and coalescing oil-mist separators, effectively removing moisture, decomposition products, oil residues and dust particles. Recovered gas meets IEC 60480 reuse standards and can be directly refilled into equipment.
Equipped with a 7-inch PLC touch screen, the unit supports one-key fully automatic operation and manual step-by-step control. It has built-in comprehensive safety protection mechanisms including over-pressure, over-current, over-temperature and low oil level alarms. The heavy-duty mobile cabinet structure with reinforced casters and traction handle is suitable for both on-site substation operation and fixed workshop use. It realizes closed-loop large-volume SF₆ gas management, reduces gas emission, lowers operation costs and meets environmental protection and production efficiency requirements.
Specifications
| Parameter | Specification |
|---|---|
| System Functions | SF₆ recovery, deep vacuumizing, purification drying, liquefied storage, pressure-regulated refilling |
| Recovery Performance | |
| Recovery Rate | 30 m³/h (at initial pressure 0.8MPa) |
| Final Recovery Pressure | ≤ 10 kPa (absolute, negative pressure deep recovery) |
| Compressor Type | Two-stage oil-free SF₆ special compressor |
| Vacuum Performance | |
| Vacuum Pumping Speed | 250 m³/h |
| Ultimate Vacuum | ≤ 5 Pa |
| Vacuum Rise Rate | ≤ 400 Pa / 24h |
| Vacuum Pump Type | Dual-stage rotary vane vacuum pump |
| Purification Performance | |
| Particulate Filtration | ≤ 0.1μm, 99.99% efficiency |
| Moisture Content After Purification | ≤ 40 ppmV |
| Oil Content After Purification | ≤ 10 ppmW |
| SF₆ Purity After Recovery | ≥ 98% by volume |
| Dryer Regeneration | Vacuum heating activation regeneration supported |
| Storage Tank | 400kg nominal liquefied storage capacity, pressure vessel certified |
| Design Pressure of Tank | 5.0 MPa |
| Control Mode | PLC + 7" touch screen, fully automatic / manual dual mode |
| Safety Protection | Over-pressure, over-current, over-temperature, low oil level alarm, emergency stop, safety valve |
| System Leakage Rate | ≤ 0.5% per year |
| Cooling Mode | Air-cooled, no external water source required |
| Input Power Supply | AC 380V ± 10%, 50Hz, three-phase |
| Operating Temperature | -10℃ ~ +50℃ |
| Ambient Humidity | ≤ 85% RH (non-condensing) |
| Structure Form | Heavy-duty mobile cabinet type with brake casters and traction handle |
Applications
Core Application Objects
- Large-capacity gas-insulated switchgear (GIS) of 110kV ~ 500kV voltage grade
- EHV SF₆ circuit breakers, gas-insulated busbars and large-capacity instrument transformers
- SF₆ insulated combined electrical apparatus and switchgear assembly lines in manufacturing plants
Typical Usage Scenarios
- Power grid operation & maintenance: large substation GIS major maintenance, fault repair and gas replacement
- Switchgear manufacturing plants: workshop assembly test, finished product gas filling and factory quality inspection
- Power engineering EPC companies: large-scale GIS equipment installation, commissioning and project handover acceptance
- Third-party testing institutions: large equipment SF₆ gas quality testing and insulation diagnosis
- Decommissioning of old equipment: large-volume SF₆ gas recovery and treatment before equipment scrapping
Advantages
Heavy-Duty Large-Capacity Processing Capability
30m³/h recovery + 250m³/h vacuum + 400kg storage → greatly improves processing efficiency for large-volume equipment, shortens maintenance downtime
Positive & Negative Pressure Deep Recovery
Two-stage recovery design minimizes residual gas → reduces SF₆ emission, more environmentally friendly and economical
Multi-Stage Deep Purification Reuse Standard
Recovered gas directly meets IEC 60480 reuse requirements → saves new gas purchase cost, realizes closed-loop circular management
Fully Automatic Intelligent Operation
One-key automatic workflow, data recording and fault diagnosis → reduces operator work intensity and human operation errors
Comprehensive Safety Protection System
Multi-level electrical + pressure + mechanical protection + pressure vessel certification → ensures personal and equipment safety during high-pressure large-volume gas operation
FAQ
Q: Can it handle large-volume GIS compartments at one time?
A: Yes. The unit is equipped with a 400kg standard liquefied storage tank, which can meet one-time recovery of conventional large-capacity GIS compartments. For larger volume scenarios, multiple recovery cycles can be performed, or the storage tank capacity can be customized according to customer requirements.
Q: Can the recovered gas be directly refilled into equipment for reuse?
A: Yes. The multi-stage deep purification system can effectively remove moisture, oil, dust and decomposition products. After one recovery cycle, all gas quality indicators meet the requirements of IEC 60480 standard for reused gas, and can be directly refilled into electrical equipment. For gas with severe decomposition after arc fault, secondary purification is recommended.
Q: What safety certification does the storage tank have?
A: The storage tank is designed and manufactured in strict accordance with national pressure vessel standards, with complete factory inspection documents and pressure vessel certification, which meets the safety requirements for on-site and workshop use. Regular inspection can be carried out according to pressure vessel management regulations.
