Water Pumps
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Water pumps are fabricated for transferring water
from one destination to another. Water pumps are used for various
applications. They are used not only to supply water for domestic
purposes but also for use in irrigation, land and mine drainage, sea
water desalination, and condensate transport. There are some of the
pumps that are specifically designed foe wastewater treatment.
Wastewater pumps for example are specifically designed for treating
wastewater like sewage, slurries etc.
Water pumps are categorized on the basis of their functions and the
types of water they are dealing with. On these basis water can be
classified as:
Wastewater pumps
Wastewater like sewage, effluent, drainage and seepage is collected by
using wastewater pumps. Pumps use various techniques to transfer water.
For example some of the pumps make the use of centrifugal force to
impart velocity to the water. Some of the pumps like positive
displacement pumps utilize gears, impellers or rollers helps in creating
vacuum for drawing water. Some of the wastewater pumps that are commonly
used are:
| Types
Of Wastewater Pump |
Features |
| Agitator Pumps
|
Agitator
pumps resuspend the slurry in a fluid form by delivering them the
kinetic energy that surrounds the pump intake. |
| Cantilever and
Circulation Pumps |
Cantilever
pumps are used for protecting the motor and seals from the pumped
media whereas the circulation pumps help in the circulation of the
media throughout the distribution or process system. |
| Dosing Pumps |
Dosing
pumps are fabricated for injecting various chemical additives into
mixing or pumping systems. They are pumps that are meant for the
low-volume fluid with controllable discharge rates. |
| Grinder
pumps |
Grinder
pumps are meant for shredding the solids |
| Macerator
pumps |
Sewage
holding tank is emptied by using macerator pump. |
| Progressive cavity
pumps |
Fluid
or media with suspended solid is transfer through pipelines or
storage tank from the suction side of the pump to the discharge side
of the pump. |
Features
of Wastewater Pump
- Adjustable speed
- Run dry for extended period of time
- Can pump sticky or stringy materials
- Media can be moved either horizontally or vertically
- They are portable, self priming and explosion proof
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Buying
Tips
Certain specifications must be looked into before going for
wastewater pumps. These specifications are:
- Maximum discharge flow.
- Maximum discharge pressure.
- Inlet and Discharge size.
- Power of the pump
- Source of the power that whether it is alternating current
(AC), direct current (DC), compressed air, gasoline, diesel
fuel, hydraulic systems, natural gas or solar energy.
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Hydraulic pumps
Hydraulic pumps impart high-pressure to the fluids. Mechanical energy
is used for creating such a high pressure. A hydraulic pump, when
powered by pressurized fluid, can act as motor by rotating in a reverse
direction. On the basis of configuration, hydraulic pumps can be
categorized as:
| Pump |
Features |
| Axial
Piston Pump |
Here fluid is
pressurize by an axially-mounted piston to pressurize fluid. The
piston when comes in contact with the fluid pressurize it. Piston is
set to motion through the mechanical motion from the pump's power
source. |
| Radial
piston pump |
In radial pump piston
is installed radially about a central axis to pressurize fluid. When
the piston is powered it enter the the chambers and pressurize
fluid. |
| Internal
and External gear pump |
Internal gears are
used for pressurizing fluid in internal gear pump. Internal gears
when powered moves fluid through the pump outlet. In external gear
pump external gears pressurizes the fluid. |
| Vane
Pump |
In a vane pump when
the vane rotates, blades blades on the vane push fluid out the
pump's outlet. There can be one, two or more pump stages. |
Buying Tips :
Hydraulic Pumps
Following specifications must be considered before buying hydraulic
pumps:
- Operating pressure
- Maximum operating pressure
- Operating speed
- Operating horsepower
- Operating temperature
- Maximum fluid flow
- Maximum fluid viscosity
- Displacement per revolution
- Pump weight.
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Condensate Pumps
Condensate are transferred for the purpose of reheating by condensate
pumps. These pumps are also used for removing condensate from an HVAC or
collection pan. Tanks, valves and other controls are important
components of the condensate pumps. The components are made of aluminum,
brass, bronze, cast iron, plastic, or stainless steel. There are two
types of condensate pumps:
| Types |
Features |
| Boiler
feed pumps |
Boiler feed pumps
condensate back into the system for reuse by closing the boiler,
steam and condensate. |
| Sump pumps |
For removing unwanted
build up of water, sump pumps are installed in compartments. |
Buying Tips
Following are the specifications that should be considered before
going for condensate pumps:
- Source of power
- Maximum discharge pressure and flow
- Temperature of the media
- Size of the tank or reservoir
- Number of pumps in an assembly
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Screw pumps
Screw pumps are meant for transferring high or low viscosity fluids
along an axis. They are rotary displacement pumps that uses screws for
transferring fluids. These pumps when used for treating wastewater, will
require, lower power drive as compared to untreated sewage or sludge or
slurries.
Progressing cavity pumps
Progressing cavity pumps are engineered for transferring fluid
consisting of suspended solids from the suction side of the pump to the
discharge side of the pump. This transfer takes place either from the
storage tanks or through the pipelines. This pump is suitable for higher
flow applications. These pumps are either single stage or multistage and
use singular screw for handling fluids in a continuous flow.
Vertical Pumps
Vertical process pumps are those pumps that contains vertical shafts.
These pumps can be used both as a wet-pit pumps or dry pumps. The
benefit these pumps is that the liquid level is above the impeller and
the pump is self priming. The shaft seal is above the level of the
liquid thereby protecting it by getting wet from the pumped liquid. This
also simplifies the sealing task.
Multistage Centrifugal Pump
In multistage centrifugal pump all impeller are placed in a series.
Here liquid passes from one impeller stage to another and finally to the
discharge unit. Some of the examples of these pumps are: Boiler feed
pump, deep well pumps, high pressure water supply pumps, etc. |
