1.Compressed air systems in industrial and commercial facilities are generally designed for pressures of *0 to **0psig . However,some special applications such as moulding, printing, and leak testing require higher pressures. 2.PETALL Booster Compressors increase air system pressure to a working pressure of **0psig and to a maximum of **0psig. these reliable units are compact, quiet, and offer an economical alternative to designing the main compressed air system for high pressure. now you simply install a PETALL booster compressor to increase the pressure of the existing compressed air where it is needed.