Large amounts of liquid in the pump gas can cause problems for pumps, e.g. due to condensation. Compared with many other pump types, the diaphragm pump is not very sensitive to condensation.

Some 1,500 exhibitors (from thirty countries) and 40,000 trade visitors are expected at Paris-Nord Villepinte, France, from 4th to 7th December 2001, for the 17th Pollutec International Exhibition of Environment Equipment, Technologies and Services for Industry.