Below is a list of Pneumatic Diaphragm Valves manufacturers from Clemmons, North Carolina. Pnuematic diaphragm valves convert the energy of compressed air in order to engage an elastomeric membrane thereby maintaining and regulating the flow of a given process stream. While manual, hydraulic and electric diaphragm valves are common alternatives, the use of a pneumatic actuator is preferred when quick valve adjustments are needed.