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The diffuser principle in the self-priming Desmi SA centrifugal pump means that the priming capacity is not dependent on valves or other mechanical elements since it is the liquid flow which carries the air.The SA pump used within different applications and markets.
Your choice of a Desmi self-priming centrifugal pump holds out the advantages of versatility and sturdiness. Once the pump casing has been filled with water, the pump will be self-priming, i.e. it will automatically remove the air in the suction pipe using the diffuser principle. Another feature is the ability of the pump to carry impurities and solids along with the actual fluid. This is due to the open impeller design including a replaceable wear plate, as distinct from closed impeller design of other centrifugal pumps.
For priming, the pump casing is filled with liquid prior to starting. Due to the rotation of the impeller the liquid is immediately pumped from suction chamber through impeller into air separating chamber.
Due to the negative pressure thus created in the impeller eye, liquid is drawn through the return passage into the impeller. Due to the negative pressure in the pump, the check valve opens so as to draw air from the suction line into the pump where liquid and air are mixed and proceed through the passage into air separating chamber.
Capacity range:
Pressure range:
Temperature range:
Open impeller design
Replaceable wear plate
Mechanical shaft seal
Check valve mounted at a high level
Heavy bearing design