Flexible Air Tight Diaphragms can normally bend at the flanging level in both directions. These Diaphragms are designed in such a way that the axial motion is enabled by the differential pressure existing between the two separation chambers or by mechanical controls such as rockers, springs or levers. These Air Tight Diaphragms are flexible and divide two chambers with variable volume and pressure. Flexible Air Tight Diaphragms ensure minimal hysteresis and high degree of sensitivity.