CompAir Ultima™
Oil-free two-stage compressors Ultima 55 to 160 kW – two motors, no gearbox
Ultima is built differently from conventional oil-free compressors: the low-pressure and high-pressure stages each have their own variable-speed permanent magnet motor. There is no gearbox.
The controller regulates both stages independently and keeps the pressure ratio optimal at all times. The result is 100 % oil- and silicone-free air with an efficiency above IE5.
Motor power
55 to 160 kW
Pressure
4 to 10 bar
Flow rate
4.4 to 24 m³/min
Hot water
up to 90 °C
Why Ultima?
Without a gearbox there are no friction losses or wear; the bearings are lubricated for life. When idling, Ultima uses 45 % less energy than conventional two-stage compressors; a 160 kW model needs less than 8 kW.
The footprint is 34 % smaller than that of the predecessor. All models are prepared for heat recovery and deliver hot water up to 90 °C. The capacity can be extended later if your demand grows.
- Two permanent magnet motors, no gearbox
- Efficiency above IE5 and IES2
- 45 % less energy when idling
- 34 % smaller footprint
- Heat recovery up to 90 °C
- Very quiet
- Capacity can be extended later
- Delcos XL SE7 controller with iConn
Product images
Technical data
| Compressor model | Cooling type | Operating pressure | Drive power | Free air delivery at 8 bar g ¹⁾ | Free air delivery at 10 bar g ¹⁾ | Sound pressure level ²⁾ at 100 % load | Dimensions L × W × H | Weight |
|---|---|---|---|---|---|---|---|---|
| [bar g] | [kW] | [m³/min] | [m³/min] | [dB(A)] | [mm] | [kg] | ||
| U55s | Air | 5 – 10 | 55 | 4,4 – 10,4 | 4,3 – 8,9 | 72 | 2281 × 1081 × 1998 | 2300 |
| Water | 5 – 10 | 55 | 4,4 – 10,4 | 4,3 – 8,9 | 64 | 1831 × 1081 × 1998 | 1750 | |
| U75s | Air | 5 – 10 | 75 | 4,4 – 14,4 | 4,3 – 12,8 | 73 | 2281 × 1081 × 1998 | 2300 |
| Water | 5 – 10 | 75 | 4,4 – 14,4 | 4,3 – 12,8 | 67 | 1831 × 1081 × 1998 | 1750 | |
| U75 | Air | 4 – 10 | 75 | 6,7 – 11,9 | 7,7 – 9,9 | 64 | 3244 × 1394 × 1992 | 3360 |
| Water | 4 – 10 | 75 | 6,7 – 11,9 | 7,7 – 9,9 | 63 | 2044 × 1394 × 1992 | 2750 | |
| U90s | Air | 5 – 10 | 90 | 4,4 – 17,0 | 4,3 – 15,5 | 74 | 2281 × 1081 × 1998 | 2300 |
| Water | 5 – 10 | 90 | 4,4 – 17,0 | 4,3 – 15,5 | 68 | 1831 × 1081 × 1998 | 1750 | |
| U90 | Air | 4 – 10 | 90 | 6,7 – 14,9 | 7,7 – 12,7 | 65 | 3244 × 1394 × 1992 | 3360 |
| Water | 4 – 10 | 90 | 6,7 – 14,9 | 7,7 – 12,7 | 64 | 2044 × 1394 × 1992 | 2750 | |
| U110s | Air | 5 – 10 | 110 | 4,4 – 19,6 | 4,3 – 18,5 | 75 | 2281 × 1081 × 1998 | 2300 |
| Water | 5 – 10 | 110 | 4,4 – 19,6 | 4,3 – 18,5 | 69 | 1831 × 1081 × 1998 | 1750 | |
| U110 | Air | 4 – 10 | 110 | 6,7 – 18,5 | 7,7 – 16,3 | 65 | 3244 × 1394 × 1992 | 3360 |
| Water | 4 – 10 | 110 | 6,7 – 18,5 | 7,7 – 16,3 | 64 | 2044 × 1394 × 1992 | 2750 | |
| U132 | Air | 4 – 10 | 132 | 6,7 – 22,2 | 7,7 – 19,9 | 67 | 3244 × 1394 × 1992 | 3360 |
| Water | 4 – 10 | 132 | 6,7 – 22,2 | 7,7 – 19,9 | 66 | 2044 × 1394 × 1992 | 2750 | |
| U160 | Air | 4 – 10 | 160 | 6,7 – 23,9 | 7,7 – 23,6 | 70 | 3244 × 1394 × 1992 | 3360 |
| Water | 4 – 10 | 160 | 6,7 – 23,9 | 7,7 – 23,6 | 69 | 2044 × 1394 × 1992 | 2750 |
¹⁾ Measured and stated in accordance with ISO 1217, 4th edition, Annex C & E, under the following conditions: intake pressure: 1 bar (a) / 14.5 psi(a), intake temperature: 20 °C, relative humidity: 0 % (dry)
²⁾ Measured under free-field conditions in accordance with ISO 2151, tolerance ±3 dB(A)
Data from CompAir. Flow rate to ISO 1217, Annex C or E. We will be happy to determine with you which version and pressure are right for your system.
Frequently asked questions
What is the “digital gearbox”?
Instead of a mechanical gearbox, each compression stage is driven by its own motor. The controller continuously adjusts the speeds of both stages so that the pressure ratio is optimal for current demand.
What does oil-free to ISO 8573-1 Class 0 mean?
Class 0 is the strictest purity class for oil in compressed air. A compressor certified to it puts no oil into the air, neither as droplets nor as vapour. You therefore need no oil filters and no oil-water separator for the condensate, and the risk of contaminated products disappears.
Can the waste heat be used?
Yes. Up to 94 % of the energy consumed turns into heat. With heat recovery you can use it to heat water or rooms. More on this under Heat recovery.
Do I still need a dryer?
Yes. Even oil-free compressed air contains moisture. Depending on the application, a refrigeration dryer is sufficient; for very dry air you need a desiccant dryer or an HOC dryer, which uses the heat of the compressor.
Who maintains the compressor?
We do. As the CompAir partner for north-western Switzerland, we maintain and repair your system with genuine spare parts and service kits. If your compressed air supply fails, you can reach our on-call service on 062 552 00 88.
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Which compressor is right for your business?
Compressed air demand, pressure, operating times and available space determine the choice. We advise you, supply the compressor with air treatment, install the system and take care of service.