UNICUS® 4S
The UNICUS® 4S is available in either 5000 or 6000 psig with discharge capacities ranging from a 13 scfm charge rate to 26 scfm charge rate. Unsurpassed maintenance accessibility abounds as we have provided all access doors with snap pin technology – pull the pin and lift the door, no hand tools are required. Should you require access to the back of the operations panel, no problem: the panel tilts forward. All requisite panels are equipped with sound attenuated material. An integral rack was built to accommodate four (4) storage cylinders as standard, along with the piping. Additionally, we provide two (2) ASME coded air storage cylinders as a part of the standard scope of supply. If you want to dress your unit up in concert with the fire department theme, ask about our Fire Edition package. When your department needs the best all-in-one compressor system on the market today, backed by a global network of service partners, look to BAUER.

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SYSTEM FOOTPRINT
UN 4/13H-E1/E3 - UN 4/26-E3:
DIMENSIONS L X W X H inches (mm)
- 101” x 38” x 80” (2565 mm x 965 mm x 2023 mm)
WEIGHT pounds (kg)
- 4350 - 4550 lbs (1973 - 2064 kg)
AVAILABLE ACCESSORIES (FACTORY INSTALLED)
- CO monitoring system
- H2S monitoring system with audible alarm
- 100 ft high pressure cabinet enclosed hose reel
- Additional air storage cylinders
- Panel mounted remote fill hose connection
- Dual Fill/3 position
- Tri Fill/3 position
- B-VIRUS FREE® (Dealer Installed)
STANDARD SCOPE OF SUPPLY
- BAUER breathing air purification system with B-SECURUS
- BAUER PLC-based controller with four-line text display
- NEMA 4-rated electrical enclosure
- Automatic condensate drain system with non-corrosive condensate reservoir and integrated float sensor and automatic “Full” indication and compressor shutdown
- Two (2) 6000 PSIG UN code stamped air cylinders
- NFPA 1901 2016 edition compliant 2 position containment fill station accommodates SCBA or SCUBA cylinders up to 31” overall length
- Unique diesel drive system incorporating our exclusive automatic belt tensioning system
- Powder coat paint for a hard, durable finish
- Hydraulic surge brakes with breakaway actuator
- Four (4) bank dual-function cascade controls with air direction valve
- Formed structural steel frame designed and built by BAUER
- Hypalon® type cover protection for the operations panel and fill station
- Refill port
- BAUER Gas-Tek™ CO monitoring system with calibration kit
- 2” ball hitch
TECHNICAL DATA
Model | Charging Rate1 | Number of Stages | Motor | FAD2 | RPM | Purification System | ||
---|---|---|---|---|---|---|---|---|
SCFM | l/min | HP | kW | |||||
5000 PSIG (345 BAR) | ||||||||
UNICUS 4S/20-E3 | 21 | 595 | 4 | 15 | 11 | 17.5 | 1300 | P5 B-SECURUS |
UNICUS 4S/26-E3 | 26.4 | 748 | 4 | 20 | 15 | 22 | 1350 | P5 B-SECURUS |
6000 PSIG (414 BAR) | ||||||||
UNICUS 4S/13-E1/E3 | 13 | 368 | 4 | 10 | 7.5 | 10.8 | 1420 | P2 B-SECURUS |
UNICUS 4S/18-E3 | 18 | 510 | 4 | 15 | 11 | 15 | 1325 | P5 B-SECURUS |
UNICUS 4S/25-E3 | 25.2 | 714 | 5 | 20 | 15 | 21 | 1300 | P5 B-SECURUS |
1) Based on recharging an 80 cubic foot tank from 500 to 3000 psig.
2) Compressor capacity referenced to standard inlet conditions.