Air-operated diaphragm pumps work on the principle of displacement. An air control system coordinates a shaft, each end of which has a flexible diaphragm attached. Compressed air or other gaseous driving media flows into the control system and sets the shaft in controlled motion. This sets the controlled diaphragm in motion, moving the medium from the inlet to the delivery chamber. The control system then gives another impulse to the shaft, displacing the medium from the delivery chamber to the outlet. The diaphragm ensures that the driving medium remains separated from the conveying medium.
Contact in Switzerland and Europe
Ateliers Ehrismann has been ensuring the highest manufacturing quality at its site in Switzerland since 1923. Together with our strong partner the AxFlow group of companies, we are represented not only in Switzerland but throughout Europe.
Individualization is our strength
Ateliers Ehrismann has one of the most modern workshops in the field of electrical engineering and metal construction. Customer orders can thus be designed to meet all individual requirements.
Certified several times
The outstanding manufacturing quality is certified several times. We can manufacture and repair process equipment, for complex and highly sensitive industrial applications. Our quality management continues to constantly optimize the processes in the areas of purchasing, manufacturing and service management in order to remain the first point of contact in Switzerland and Europe in the future.
Double diaphragm pumps with flap valves are adapted to abrasive and highly viscous media with particle sizes of up to 75mm for the wastewater industry. The special arrangement and nature of the components prevents pump blockage.
Depending on the application, different housing materials are used. For heavy-duty applications, robust materials such as aluminium, alloy C, stainless steel and grey cast iron are suitable. Corrosion-resistant materials such as polypropylene and PVDF are used for pumping chemical media.
Air-operated diaphragm pumps have the property of being able to run dry. AODD pumps can draw in media from several metres without damaging the components. Especially in irregular operation of the pumping technology, this is a decisive advantage over other pumps.