A powerful compressor is the be-all and end-all for discharging a silo, because it is the principal determining factor for the time required to discharge the vessel. Reliability, power and the capability to work continuously for long periods are therefore criteria on which we place particular value when it comes to product selection. winkler has the premier manufacturers in its product range, with the brands GHH, CVS, RIWO, Gardner Denver and Blackmer.