OPERATING LIMITS: 
Fluid temporature up to +35 
Maximum amblent temperature40 
Brass foot valve 
Impeller: Plastic or 100%brass impeller 
Winding: 100%copper winding or aluminum winding 
Cast iron bracket 
220V/50Hz 
110V/220V/60Hz can also be provided on your requirement 
Mechanical seal: Graphite and Ceramic 
Shaft: 45#steel 

WORKING PRINCIPLE 
The series are SELF PRIMING CENTRIFUGAL PUMPS which are suitable for deep wells. Self-priming is achieved by using an ejector, housed in the jet body, which can be installed directly on the pump body or more often lowered in a well and connected to the pump body by two pipes. The total delivery produced by the closed centrifugal impeller is sent only to the delivery opening. The remaining(driving)water is recirclated through the ejector, which is connected to the suction chamber where it generates the necessary vacuum to draw up water from the point where the jet body is immersed. 
The water from the jet body opening mixes in the diffuser with recirculating water from the pump, thus increasing its pressure at the expense of the recirculating water, and is drawn into the pump through the suction pipe.