www.saVRee.com Diaphragm Pump Explained| pg. 6
Diaphragm Membrane
The diaphragm is actuated via a pneumatic piston. When pneumatic pressure is applied
to one side of the piston, the diaphragm changes to a concave shape. When pneumatic
pressure is applied to the other side of the piston, the diaphragm changes to a convex
shape. As the diaphragm changes shape, a positive (convex) or negative (concave)
pressure is created between the two non-return valves; fluid is sucked or discharged from
the pump due to the pressure difference created. Diaphragm membranes are typically
constructed of thick rubber material.
Pneumatic Valves
Pneumatic valves within the diaphragm casing distribute air to either side of the piston.
As air is distributed to each side of the piston, the piston direction changes, and so too
does the shape of the diaphragm (convex to concave etc.).