Not  everyone  can  make  an  industry standard. When  we  designed  and
  built  the  Quincy®  QR-25,   however,  that  is  exactly  what  we  created;
  --the  industry  standard  for  reciprocating  compressors.

  Because the  QR-25  runs  at  slower  speeds  than  other  compressors, it
  has a  lower operating  temperature and  achieves  maximum  compressor
  efficiency.  The QR-25  features  durable  cast  iron  construction for longer
  life  and  less  down time,  and  heavy-duty  disc-type  valves  for  efficient
  air flow. The result is more air per horsepower

  And the  QR-25  series gives you unmatched flexibility.  Choose horsepower
  from 1/3  to  25,  choose single stage or two-stage,  or choose base mount
  or tank mount.

  No matter which  QR-25  model you select,  you're choosing  Quincy Quality.
  Because of that  quality,  the  QR-25  is backed by the  most comprehensive
  five-year warranty in the business. It's the standard of durability, commonly
  in use for 20, 30, even 40 years.