BAUER GRU® DUPLEX
The BAUER GRU® DUPLEX biogas compressor is designed for larger flow applications where extreme turn-down and redundancy are required. The BAUER GRU® Biogas Recovery Compressor range has been specifically designed for methane recovery and conditioning in biogas applications. The function of the biogas recovery compressor is to elevate the pressure of the incoming biogas from 1-7 PSIG (typical) to 90-230 psig, which is the operating pressure requirement for most PSA/membrane type gas conditioning systems. BAUER offers a complete BAUER GRU® system size range from 10 HP to 750 HP (7.5-560 kW).

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5 Different HP Size Ranges
- 250-500 HP (150-370 kW)
- 500-1600 scfm (850-2790 m3/hr)
- 75% TURN-DOWN CAPABILITY TO 25% OF MAX
- BUILT-IN REDUNDANCY
SYSTEM FOOTPRINT
With enclosure and vent stacks
- 216.5” L x 96.5” W x 154.3” H (5499 mm X 2451 mm X 3919 mm)
Without enclosure and vent stacks
- 216.5” L x 96.5” W x 96.1” H (5499 mm X 2451 mm X 2441 mm)
BAUER GRU® Duplex Flow Performance Table at 230 PSIG (16 bar) Final Pressure | ||||||||||||||
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Flow Rate at Various Inlet Suction Pressures scfm/(m3/hr) | ||||||||||||||
Compressor Model | Motor | SCFM | M3/H | SCFM | M3/H | SCFM | M3/H | |||||||
HP | kW | LOW | HIGH | LOW | HIGH | LOW | HIGH | LOW | HIGH | LOW | HIGH | LOW | HIGH | |
BAUER GRU® 15-100 Duplex | 100 x 2 | 75 x 2 | 154 | 498 | 262 | 846 | 228 | 666 | 387 | 1132 | 260 | 730 | 442 | 1240 |
BAUER GRU® 15-125 Duplex | 125 x 2 | 93 x 2 | 154 | 610 | 262 | 1036 | 228 | 826 | 387 | 1403 | 260 | 906 | 442 | 1539 |
BAUER GRU® 28-150 Duplex | 150 x 2 | 112 x 2 | 228 | 710 | 387 | 1206 | 340 | 1016 | 578 | 1726 | 388 | 1108 | 659 | 1883 |
BAUER GRU® 28-200 Duplex | 200 x 2 | 149 x 2 | 354 | 1024 | 601 | 1740 | 528 | 1380 | 897 | 2345 | 602 | 1510 | 1022 | 2566 |
BAUER GRU® 28-250 Duplex | 250 x 2 | 186 x 2 | 354 | 1110 | 601 | 1886 | 528 | 1498 | 897 | 2545 | 602 | 1642 | 1023 | 2790 |
All performance values referenced in the table above are based on the following conditions: Referenced to ISO 1217 (14.50 psi (100 kPA), 68° F (20° C), 0% RH), Biogas temperature at compressor inlet: 86° F (30° C). Biogas Composition: 52% CH4, 46% CO2, 1% N2, 1% O2. Discharge pressure at compressor skid edge: 230 psig (15.8 bar). Any deviations from these conditions will modify the stated performance results. Consult with your Bauer representative for conditions other than referenced herein.