Product Introduction
As an insulating gas, SF6 is non‑toxic, non‑flammable, and offers excellent insulation characteristics. Its insulation strength is significantly higher than that of traditional insulating gases, and it also possesses superior arc‑quenching properties. As a result, SF6 is widely used in SF6 electrical equipment.
However, SF6 gas is expensive, and under the action of arcs, sparks, and corona discharges, it can decompose and produce toxic by‑products. Therefore, SF6 gas recovery is necessary during the application of SF6 electrical equipment. This device is specially designed for recovering and recharging SF6 gas during the manufacturing and maintenance of SF6 electrical equipment.
The device is suitable for vacuuming, gas filling, recharging, purification, and recovery of SF6 gas in SF6 electrical equipment.
The device consists of an SF6 gas recovery unit. Its main advantages include the ability to directly store recovered SF6 gas in liquid form in a container, recover residual pressure in GIS to 53 kPa (absolute pressure), compact size for easy mobility and placement, fast vacuuming speed, and the ability to dry and filter the recovered SF6 gas. It can also recharge SF6 gas back into SF6 electrical equipment.
Product functions
SF6 gas recovery: Quickly and safely recovers SF6 gas from equipment, reducing emissions.
Vacuum evacuation: Performs vacuum treatment on electrical equipment to prepare for gas filling operations.
Gas purification: Removes moisture, particulates, oil contamination, and decomposition products to improve gas purity.
Gas storage: Stores purified SF6 gas in high-pressure storage tanks for convenient transport and reuse.
SF6 gas filling: Precisely fills SF6 gas into equipment such as GIS and circuit breakers.
Technical Parameter
| Recovery | Initial recovery pressure ≤0.8MPa |
| Final recovery pressure ≤50KPa | |
| Recovery time: For 1 m3 SF6 gas volume with initial pressure of 0.8MPa, recovery to the final pressure of 50KPa, the recovery time is less than 2.5 hours | |
| Aeration | 1 m3 SF6 gas volume with initial pressure of 133Pa is charged to 0.8mpa, and the charging time is less than 0.8 hours |
| Vacuum extraction | The limit vacuum degree of the device is less than or equal to 10 Pa, and the time required to vacuum the 1 m3 SF6 gas volume with an initial pressure of 0.1MPa to 133Pa is less than 1.0 hours |
| 저장 | Storage container volume 0.05m3 |
| Nominal liquid storage capacity 50kg | |
| Maximum storage pressure 3.8MPa | |
| Decontamination | For SF6 gas with water content below 1000PPM (volume ratio), after recovery and purification by the device, the water content is less than 60PPM (weight ratio), and the oil content is less than 10PPM (weight ratio). |
| Annual leakage rate | ≤1% nominal storage |
| 소음 | ≤75dB(A) Sound pressure level |
| Operating ambient temperature | -10℃-40 ℃ |
| 전원 | AC three-phase five-wire system 50Hz 400V±10% |
| 힘 | ≤5kW |
| 무게 | About 545kg |
| Overall dimensions (L × W × H) | 1450×810×1200mm3 |
Main Component Performance Parameters
| Index name | SF6 Gas Recovery Device |
| Power supply AC | 380(three five-wire, phase sequence automatic conversion) |
| Rated maximum gas storage pressure (20℃) | ≤4MPa |
| Limiting vacuum | ≤10Pa |
| Device vacuum maintenance | At 133Pa pressure for 24H, the vacuum value rose < 400Pa |
| SF6 Compressor | French Meyoule |
| 압축기 펌핑 속도 | 7m3/h (customizable) |
| 진공펌프 | 2X-4 |
| Vacuum pump pumping rate | 15m3/h |
| Recovery device ADAPTS to inlet initial pressure (20℃) | 0-1.0 MPa |
| Final pressure of electrical equipment recovery (20℃) | ≤50Kpa |
| Gas oil control after recovery | Domestic oil content < 10μg/g |
| Unit annual air leakage rate | < 1% |
| Continuous trouble-free operation time of the device | ≥1000h |
| Cumulative trouble-free running time | ≥5000h |
| 소음 수준 | Machine ≤75dB(A) |
| Theoretical liquid storage capacity | 50kg |
| Refrigerated liquefaction compressor | Dombe |
| Refrigerated storage tank | 50L |
| Recovered gas moisture | 60PPM/V |
| After recovery of gas oil | 10PPM/V |
| Dry filtration system | Vacuum heating activation regeneration |
| Initial gas pressure | ≤133pa |
| Charging final pressure | 0.8 mpa |
| Inflation rate | ≥5m3/h |
| Gasification mode | 전기난방 자동 온도 조절 |
| 차량 종류 | push-type |
| Overall dimension | 1450×810×1200cm3 |
| Machine weight | About 545kg |
| Cooling mode | Air cooling |
| Filtration system | The use of American HASON technology, three-stage filtration - can higher remove the recovered SF6 gas in the water, oil, particulate impurities and dust, to ensure that the recovered SF6 gas reuse |
Concise Parameter Table
| Model number | SF6 Gas Recovery Device |
| Vacuum pump pumping speed | 15m3/h |
| Limiting vacuum | 10Pa |
| 진공펌프 | 국내 양극 진공 펌프 |
| SF6 Recovery compressor | 7m3/h |
| Stress | 2.5 MPa |
| Compressor manufacturer | French Meyoule |
| Filter particle | 0.02 micron |
| Oil content | High Efficiency (PPM) |
| Acid number | 0.1 parts per million |
| Hydrolyzable fluoride | 0.2 parts per million |
| Biotoxicity | no |
| Moisture | ≤60PPM |
| SF6 purity | 99.9% or higher |
| SF6 storage tank | 50L |
| SF6 탱크 재질 | Carbon steel |
| Refrigeration system | High quality and efficient compressor |
| Filter | American original |
| 건조기 | American original |
| Vacuum gauge | 바늘 |
| Valve | Unique technology (built-in butterfly seal to ensure that multiple switches do not leak) |
Product Characteristics
1、Built-in phase sequence protector, no matter when can avoid the host due to phase sequence error and reversal of the worry.
2、All electrical systems are branded with high quality.
3、High-quality casters will greatly protect the floor paint and reduce the labor required when pushing.
4、The machine is air-cooled and does not require an external water source.
5、Built-in temperature protection system works even at -20 degrees Celsius.
6、Built-in drying and heating system ensures that the desiccant can be heated and regenerated by the equipment after saturation, so that there is no need to replace the desiccant.
Application Scenarios
GIS gas-insulated switchgear maintenance: During GIS equipment installation, overhaul, expansion, and decommissioning, SF6 gas is recovered, purified, stored, and refilled to reduce gas emissions and improve maintenance efficiency.
SF6 circuit breaker installation and overhaul: During circuit breaker commissioning, fault repair, and routine maintenance, SF6 gas is safely processed to ensure rapid restoration of equipment operation after maintenance is completed.
Substation high-voltage equipment operation and maintenance: Suitable for routine maintenance and scheduled overhauls of various SF6-insulated equipment in substations, supporting long-term stable operation through professional gas management.
Power equipment manufacturing and factory testing: During the production of high-voltage electrical equipment, provides vacuum evacuation, gas filling, and gas recovery services for products such as GIS, circuit breakers, and transformers, meeting production assembly and factory testing requirements.
Power plant electrical equipment maintenance: In thermal, hydro, nuclear, and gas-fired power plants, provides gas recovery and replenishment for SF6-insulated switchgear, ensuring safety and continuity in power generation equipment maintenance.
New energy power plant operation and maintenance: Suitable for SF6 electrical equipment in wind farms, photovoltaic plants, and energy storage projects, achieving efficient SF6 gas management during equipment inspection, upgrade, and fault handling.
Power engineering construction and on-site commissioning: During transmission and substation project construction and pre-commissioning of new equipment, supports SF6 gas filling, vacuum evacuation, and sealing treatment for on-site installation and commissioning work, improving project delivery efficiency.
Faq about SF6 Gas Recovery Filling Storage Tester
What is an SF6 gas recovery unit, and what role does it play in power equipment maintenance?
An SF6 gas recovery unit is a specialized device used for recovering, purifying, storing, and refilling sulfur hexafluoride (SF6) gas. It enables closed-loop gas management during equipment installation, maintenance, and decommissioning. By reducing SF6 gas emissions and supporting gas recycling, it helps lower operating costs, meet environmental requirements, and ensure that high-voltage electrical equipment can be safely and efficiently returned to service.
How does the SF6 gas recovery unit maintain the quality of recovered gas?
During the recovery process, the equipment removes impurities and moisture from the gas through filtration and drying systems, while minimizing the risk of ambient air ingress into the system to maintain SF6 gas purity. For gas that has been stored for a long time or comes from complex sources, professional testing methods can be used to confirm whether it meets the requirements for reuse, thereby improving the reliability of equipment operation.
Which power equipment is most suitable for use with an SF6 gas recovery unit?
A: The SF6 gas recovery unit is suitable for GIS (gas-insulated switchgear), SF6 circuit breakers, gas-insulated transformers, ring main units, and other equipment that uses SF6 as an insulating or arc-quenching medium. For equipment with large gas volumes or high maintenance frequency, using a professional recovery unit can improve operational efficiency and reduce environmental impact during maintenance.
