Types
Centrifugal pump has a lot types, classification method commonly have following several ways
一 according to impeller number: single stage centrifugal pump, multistage centrifugal pump
1 Single stage pump: there is one impeller on pump shaft.
2 Multistage pump: there are two or more impellers on shaft, and pump total head is the sum of N impeller heads.
二 according to working pressure: low pressure, middle pressure, and high pressure centrifugal pump
1 low pressure pump: pressure is lower than 100 m water column
2 middle pressure pump: pressure is between 100 and 650 m water column
3 High pressure pump: pressure is higher than 650 m water column
三 according to impeller inflow manner
1 unilateral feed water pump: also called single suction pump, namely the impeller is only an inlet,
2 bilateral water pump: also called double suction pump, namely on both sides of the impeller have an inlet. Its flow rate is one time larger than the single suction pump, can approximate as two single suction pump impeller back-to-back together.
四 according to pump casing combination form
1 Horizontal split-case pump: namely in the horizontal plane through axis line have combined seam.
2 vertical combined pump: namely the junction plane is vertical to axial lead.
五 according to shaft position: horizontal type, and vertical type
1 Horizontal type pump: pump shaft is on horizontal position
2 Vertical type pump: pump shaft is on vertical position
六 according to suction type: signle suction type, double suction type.
七 according to impeller structures: open type, semi-open type, and closed type impeller centrifugal pump
八 according to the impeller leads water to delivery chamber mode
1. Volute pump: after water flows out of impeller, directly entering into casing with helix shape.
2. guide vane pump: after water coming out from impeller, entering into the guide vane that setted outside, then entering into next level or inflows outlet tube.
Usually, we say pump belongs to multistage pumps, refers to how many impeller. Based on other structure characteristics, it may be horizontal pumps, vertical junction plane pump, guide vane pump, high-pressure pump, single feed water pump, etc. So name is different according to different terms. In addition, according to usage can also be classified, such as oil, water pump and condensate pump, electric dust removal pump, circulating water pump, etc
