The BAUER GRU™ Vapor Recovery system range has been specifically designed for gas vapor recovery in oil and gas production facilities. BAUER offers a complete size range from 10 HP to 75 HP. Larger systems (125-500 HP) are available under the GRU™ XL line. At the heart of every BAUER GRU™ vapor recovery system is the legendary BAUER Rotorcomp® rotary screw compressor, world-renowned for exceptional durability and reliability. The sophisticated control system within the GRU™ senses pressure upstream of the unit, and automatically adjusts compressor speed to modulate compressor output based on the availability of gas. If there is an insufficient amount of gas available for compression, the system automatically goes into standby mode, for instantaneous compression when upstream gas pressure suddenly increases. This significantly reduces the “need” to vent gas into the atmosphere, because the compressor is ready to operate instantaneously (compared to ramping up through normal start-up sequences after being completely shut down).