Ariel Compressor frames are not horsepower limited.  Ariel compressor frames are limited by internal gas rod load.  The published horsepower ratings are guidelines to be used in applying each compressor frame.  The horsepower ratings may be exceeded, as long as other application limits are not exceeded.  A torsional analysis should be performed to confirm vibratory torque limits are not exceeded.

Some frames carry a power limit on each throw. This limit is flagged separately, and is speed dependent. The KBK:T frame includes a power per throw limit.