General classification

 
  Flat Diaphragm Bead Diaphragm Plate Diaphragm Roll Diaphragm
Stroke Range low middle middle – high high – very high
Working Stroke at Work Diameter of 50 mm ± 2.25 mm ± 4.75 mm ± 6 mm ± 15mm
Preferred Function regulate, pump regulate control, pump control
Pressure Contact double sides single side double sides single side