WELCOME

Md. Nurul Kadir

Lecturer

Department of Agricultural Engineering

MAIN FEATURES

PUMPS AND TUBE WELLS

DIFFERENT TYPES OF PUMPS

DIFFERENT TYPES TUBE WELLS

PUMPS

• A pump is a mechanical appliance used to increase the

pressure energy of a liquid, in order to lift it from a lower

to a higher level.

• This is usually achieved by creating a low pressure at inlet and a

high pressure at the outlet ends of the pump.

• Thus, the principle of working of a pump is distinctly different from

the indigenous water lifts in which water is lifted by displacement

through buckets, water wheels or screws.

• Two basic groups of pumps 1. Positive displacement pumps 2.

Variable-displacement pumps

PUMPSPumps have two main purposes:

1. Transfer of liquid from one place to another place (e.g. water from an

underground aquifer into a water storage tank)

2. Circulate liquid around a system (e.g. cooling water or lubricants through

machines and equipment)

• PUMPS

• PRIME MOVERS: Electric motors, diesel engines or air

system

• PIPING: Used to carry the fluid

• VALVES: Used to control the flow in the system

• OTHER FITTINGS: Controls and instrumentation

• END-USE EQUIPMENT: Which have different

requirements and therefore determine the pumping

system components and configuration. Examples include

heat exchangers, tanks and hydraulic machines.

The pump and the prime mover are typically the most

energy inefficient components.

THE MAIN COMPONENTS OF A PUMPING SYSTEM

TUBE WELLS

A WELL is a hole dug in the ground to obtain the subsoil water.

A tube well is a type of water well in which a long 100–200 mm

(4 to 8 inch) wide stainless steel tube or pipe is bored into an

underground aquifer. The lower end is fitted with a strainer, and

a pump at the top lifts water for irrigation. The required depth of

the well depends on the depth of the water table.

• YIELD FROM STANDARD TUBE WELL 40-45 L/S.

• SHALLOW TUBE WELLS : 30-60M DEPTH, 20 L/S YIELD

• DEEP TUBE WELLS : 60-300 M DEPTH, YIELD 200 L/S

Different types of PUMPS

1. On the basis of type of service:

a) Deep well pumps

b) Low lift pumps (LLP)

c) High lift pumps

d) Booster pumps

e) Fire service pumps

f) Stand-by pumps

Different types of PUMPS

2. On the basis of Power used to drive them:

a) Steam pumps

b) Gasoline pumps

c) Diesel pumps

d) Electric pumps

Different types of PUMPS

3. On the basis of Mechanical Principles of Operation:

a) Displacement Pumps

i. Reciprocating

ii. Rotary

b) Centrifugal Pumps

c) Air-lift Pumps

TYPES TUBE WELLS