Hi Guys
On a different note
Does any other country know a pumper drum that is used to pump liquid ammonia in the place of a normal hermetic or Witt pump?
We make use of double pumper drums that uses flash gas to rise the pressure in a vessel to pump liquid ammonia. GEA apparently made tests and compared to Witt pump energy usage and according to them it uses more energy, this does not make sense as flash gas is a wasted energy when filling the accumulator.

My opinion is that they spread this story as they are losing money not selling pumps.
We have pumper drums running for more than 30 years with no maintenance needed, but overhauling a Witt pump is expensive these days.