BAUER XXL™ SERIES
The BAUER XXL™ SERIES CNG systems have been designed to provide maximum flow at very low inlet pressures, ranging from 5 psig up to 25 psig (although the systems are also capable of taking higher inlet pressures).
Maximizing CNG flow at low inlet pressures is accomplished by adding another stage of compression in front of our standard C23.12 M-SERIES, C26.12 X-FILL, and C52.12 X-FILL booster compressor systems for CNG.
The first compressor stage in the BAUER XXL™ SERIES CNG compressor is a standard BAUER GRU® rotary screw gas compressor system. BAUER GRU® rotary screw compressor systems have been used extensively in biogas applications around the world with a track record of extreme reliability. The BAUER GRU® compressor boosts the available utility gas inlet pressure to maximize the performance of BAUER’s standard M-SERIES and X-FILL series reciprocating booster compressors.

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BAUER XXL™ SERIES CNG System Diagram

BAUER C26 XXL MOBILE

Self-contained transportable CNG System configured for plug-and-play operation with instant site set-up. Flexible inlet pressure range from 5-215 psig.
SPECIFICATIONS
- 250-275 HP (187-205 kW)
- 360 scfm (612 m3/h)
- 5000 psig (345 bar) psig max discharge pressure
SYSTEM FOOTPRINT
Dimensions LxWxH inches(mm)
- 40’ X 8’ X 9.5’ (12,192 mm X 2,438 mm X 289 mm)
BAUER C23 XXL SYSTEM

SPECIFICATIONS
- 270-335 HP (200-250 kW)
- 340-761 scfm (578-1293 m3/h)
- 5000 psig (345 bar) max discharge pressure
SYSTEM FOOTPRINT
Dimensions LxWxH inches(mm)
- 297.6” X 99.6” X 117”
(7559.04 mm X 2529.84 mm X 2971.8 mm)
WEIGHT pounds (kg) approx.
- 22700 lbs (10297 kg)
BAUER C52 XXL SYSTEM

SPECIFICATIONS
- 475-550 HP (355-410 kW)
- 720 scfm (1244 m3/h)
- 5000 psig (345 bar) max discharge pressure
SYSTEM FOOTPRINT
BAUER GRU® 15/28
- 100” W X 130” L X 117” H (2540 mm W X 3886 mm L X 2971 mm H)
C.52.12 X-FILL
- 297.6” L X 99.6” W X 117” H (297.6mm x 2529.84mm x 2971.8mm)
TECHNICAL DATA
Model | Gas Inlet Pressure Range (see note 1 & 4) |
Final Discharge Pressure | CNG Flow Capacity (see note 2) | Number of Stages | Motor (see note 3) | ||||||||||
PSIG | BAR | PSIG | BAR | ||||||||||||
MIN | MAX | MIN | MAX | SCFM | M3/H | DGE/H | DLE/H | GGE/H | GLE/H | HP | kW | ||||
C23-XXL | 5 | 25 | 0.35 | 1.72 | 5000 | 345 | 115 | 195 | 49 | 186 | 58 | 219 | 5 | 75-90 | 56-67 |
C23-XXL Duplex | 5 | 25 | 0.35 | 1.72 | 5000 | 345 | 230 | 390 | 98 | 371 | 116 | 439 | 5 | 150-180 | 112-135 |
C26-XXL | 5 | 25 | 0.35 | 1.72 | 5000 | 345 | 360 | 612 | 153 | 579 | 182 | 689 | 5 | 250-275 | 187-205 |
C26-XXL Mobile | 5 | 25 | 0.35 | 1.72 | 5000 | 345 | 360 | 612 | 153 | 579 | 182 | 689 | 5 | 250-275 | 187-205 |
C52-XXL | 5 | 25 | 0.35 | 1.72 | 5000 | 345 | 720 | 1244 | 307 | 1162 | 363 | 1374 | 5 | 475-550 | 355-410 |
Note 1: The volumetric capacity stated in the table can be achieved for all inlet pressure scenarios upwards of 5 psig inlet pressure. The size for the first stage GRU compressor varies with available gas inlet pressure.
Note 2: Volumetric performance stated in ISO1217 Standard Conditions: 14.5 psig, 68° F, 0%RH (100,000 kPA, 20° C, 0%RH)
Note 3: Motor power (HP/kW) requirement depends on inlet pressure which determines the size of the GRU rotary screw booster used for the application
Note 4: Gas inlet pressures above 25 psig require a gas inlet regulator