SELF-PRIMING

DESCRIPTION
The stac-self series are self-priming centrifugal pumps, with open impeller and interchangeable wear plate. The special design of the pump casing allows a quick priming up to 7,5 m of depth. A non return valve is Incorporated into the body and avoids its emptying when the pump is stopped, so it can starts quickly again. No return valve is needed along the suction pipe. The mechanical seal is abrasion-resistant and grease lubricated.

ADVANTAGES
Because of its self-priming capacity the pump can be used without filling up the suction pipe and without other vaives except the one incorporated in the body of the pump. For this reason, it can be easily used as portable pumps driven by electric motors or endothermic engines. The open impeller with large thickness blades and the interchangeable wear plates give a good abrasion resistance against sand, marble dust, gravel, eto... The impeller can be inspected by opening the specific covers without disassembling the pump.

APPLICATIONS
The stac-self pump are properly used for pumping dirty liquids also with filamentous substances in many industrial fields, in the civil engineering works for flood land drainage or water table lowering, and in ecology for water treatment, sewage pumping, fumnes exhaustion.


SELF-PRIMING

It's the capacity of pump to evacuate the air in the suction pipe when started. This is possible making in turbulence the fluid inside the body of the pump with liquid using the specific upper cover. When started the impeller creates a turbulence that ailows the passage of the air from the suction to the delivery port. All the stac-self pumps are able to create a depression of 0.8 bar at least, this is enough to grant During the utilization of the pump a correct Functioning.

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