Water-Lifting Devices – Pumps - Practices of Irrigation and On-farm Water Management - page 454

Applications

• Open well pumping for irrigation

• River and canal lift-irrigation

• Pumping from in-well bores

• Sprinkler and drip irrigation systems

• Pumping from sumps for high-rise buildings and industry

12.5.2.7 Open Well Submersible Pumps

Single phase open submersible pumps are extensively used for domestic water sup-
ply, irrigation-open, drip, sprinklers, high-pressure washing garages and poultry
farms (Fig. 12.3 ) .

Fig. 12.3 Views of single phase open-well submersible pump

Applications

• Domestic water supply

• High-raise buildings

• Gardening and sprinkler

• Industries, for clean water handling

• Storage tank filling

12.5.3 Mono-Block Pump

12.5.3.1 Features

It is one of the most common types of centrifugal pump employed for irrigation.
It consists of impeller or rotor and progressively widening spiral or volute casing.
The pump is directly connected to the prime mover, which may be electric motor
or engine. The direct coupling feature reduces transmission losses. Upon rotation
of the impeller, the water enters at the eye, which is thrown radially outward to the
periphery. Such an action causes vacuum at the eye and thus more water enters the
suction pipe to maintain the continuous flow. The impeller accelerates the water to