In order to obtain correct operation and the best operating results, a number of important measures are essential, starting with the preparation of the safety devices (pressure unloader valves, safety valves, cardan shaft cones, etc.) together with the correct sizing of hoses and filters.
One of the most important recommendations is that the pump should never be fed from a positive pressure water source (e.g. water supply or other pump), since positive pressure can interfere with valve closure and result in early component wear.
The diaphragm pump must also be installed below the level of the feed tank so that the liquid can flow to the pump at natural atmospheric pressure and avoid cavitation.
In case of feeding from canals, reservoirs or tanks located below the pump, the feeding occurs by suction, i.e. at negative pressure (vacuum). In this case, make sure that the water level is no more than three meters below the pump’s suction fitting in order to avoid the aforementioned cavitation.
Read also: THE COMPONENTS OF A DIAPHRAGM PUMP