SF6 gas servicing cart: recovery, evacuation, refilling and purification
Leaving SF6 equipment practically empty of gas before opening it, drying it under deep vacuum and refilling it with the same cleaned gas takes a servicing cart that recovers to very low residual pressures and compresses enough to liquefy the SF6. The AE736A recovers SF6 below 0.5 mbar while compressing up to 50 bar, pulls vacuum below 0.0001 mbar and returns the gas dried and filtered to 0.5 µm, on a cart built to order in mounting, compressor, control and storage.
SF6 calculator
Estimate how long recovery and evacuation of a compartment take and how much gas is left inside →AE736A key data
- Functions: the AE736A removes SF6 from the equipment, liquefies and stores it; evacuates the equipment for dry-out; re-evaporates the gas for refilling; and purifies it by absorbing decomposition products and moisture.
- Recovery and vacuum: the AE736A recovers SF6 below 0.5 mbar while compressing up to 50 bar, and its vacuum circuit goes below 0.0001 mbar.
- Purification: the AE736A dries and filters SF6 to 0.5 µm, with a colour-change moisture indicator.
- Control: the AE736A is operated manually or by PLC, with an optional HMI touchscreen offering one-touch start and stop.
- Compressor: the AE736A is supplied with a choice of oil-less, oil-free or oil-lubricated SF6 compressor.
- Configuration: the AE736A is trailer, caster or skid mounted, with an aluminium enclosure or roll-up tarpaulin sides, with or without on-board storage and for any voltage and frequency combination.
- Safety: the AE736A shuts off automatically at maximum allowable pressure, has an automatic high-pressure shutdown with warning light and restarts through an internal equalisation circuit; valves and fittings are instrumentation grade.
Advantages
The complete cycle in one machine
Removal and liquefaction of the gas into the storage tank, evacuation of the equipment for dry-out, re-evaporation for refilling and purification by absorption of decomposition products and moisture.
Deep recovery
Recovery capability below 0.5 mbar minimises the SF6 left in the equipment, and the vacuum circuit reaches below 0.0001 mbar for thorough dry-out before recharging.
Configured to the job
Manual or PLC control with optional one-touch HMI touchscreen, choice of oil-less, oil-free or oil-lubricated compressors, and any worldwide voltage and frequency combination.
Safe by design
Automatic shut-off at maximum allowable pressure, automatic high-pressure shutdown with warning light, internal equalisation restart circuit and instrumentation-grade valves and fittings.
Mobility to match the site
Trailer, caster or skid mounting, with aluminium enclosure or roll-up tarpaulin sides, with or without on-board storage.
Applications
- Gas-insulated switchgear and circuit breakers charged with SF6.
- Bus ducts, accelerators and transformers using SF6 as dielectric.
- SF6 reclaiming and handling during commissioning and maintenance.
About the product
The AE736A is a custom-built servicing cart: simple to operate, with limited maintenance and safe, economical running. A regulated inlet connects directly to high-pressure bottles, heavy-duty suction and discharge gauges and a colour-change moisture indicator monitor the process, and 3 m hoses with power cable are included.
Technical specifications
| Recovery | Below 0.5 mbar; compression up to 50 bar |
| Vacuum | Below 0.0001 mbar |
| Purification | Drying and filtering to 0.5 µm; absorption of decomposition products |
| Control | Manual, PLC or optional HMI touchscreen |
| Compressors | Oil-less, oil-free or oil-lubricated |
| Supply | All voltage and frequency combinations |
| Mounting | Trailer, caster or skid; aluminium enclosure or tarpaulin sides |
| Storage | With or without on-board tank |
| Safety | Automatic shut-off at maximum allowable pressure; high-pressure shutdown with warning light; internal equalisation restarting circuit |
| Instrumentation | Instrumentation-grade valves and fittings; heavy-duty suction and discharge gauges; colour-change moisture indicator |
| Included | 3 m hoses and power cable |
Frequently asked questions
Which configurations does the AE736A accept?
The AE736A is built to order: trailer, caster or skid mounted; with an aluminium enclosure or roll-up tarpaulin sides; with or without on-board storage; with an oil-less, oil-free or oil-lubricated compressor; and for any voltage and frequency combination.
What safety protections does the AE736A have?
The AE736A shuts off automatically when maximum allowable pressure is reached, has an automatic high-pressure shutdown with warning light and an internal equalisation restarting circuit, and uses instrumentation-grade valves and fittings with heavy-duty suction and discharge gauges.
Which functions does the cart perform?
Four: recovery with liquefaction and storage, evacuation of the equipment for dry-out, re-evaporation for refilling, and purification by absorption of decomposition products and moisture.
How far does the recovery go?
Below 0.5 mbar of residual pressure, compressing up to 50 bar for liquefaction even in high ambient temperatures.
How is it controlled?
Manually or by PLC; an optional HMI touchscreen adds one-touch start and stop.
Can it connect to gas bottles?
Yes. The regulated inlet connects directly to high-pressure bottles without throttling, and the cart works with tanks, bottles or other carts.
