Centrifugal Pump
Its purpose is to convert the energy of the driver first into velocity or kinetic energy and then into pressure energy of a fluid that is being pumped.
Centrifugal Pump
Can be used to describe all impeller type rotodynamic pumps which include the radial, axial, and mixed flow variations.
Radial-Flow Pump
Referred as volute centrifugal pumps, it converts the energy of an electric motor or engine into velocity or kinetic energy and then into pressure of a fluid that is being pumped
Axial Flow Pumps
Differ from radial flow in that the fluid enters and exits along the same direction parallel to the rotating shaft.
Mixed Flow Pumpe
Function as a compromise between radial and axial flow pumps.
Aquifer
Is an underground formation that containssufficient saturated permeable material to yield significant quantities of water
Axial Flow
Fluid moves through the pump perpendicular to the axis of rotation of propeller.
Bearings
Accurately positions the shaft and carries both radial and axial load.
Casing
Is the enclosure within which the impeller rotates.
Cavitation
The rapid formation and collapse of vapor bubbles in a flowing luquid in reguons of very low pressure, causing serious wear, tear and damage.
Centrifugal Force
An apparent force that acts outward on a body moving around a center, arising from the body's inertia.
Centrifugal Pump
Converts input power to kinetic energy by accelerating liquid in a revolving device � an impeller.
Diffuser
A piece, adjacent to the impeller exit, which has multiple passages of increasing area for converting velocity to pressure
Drawdown
Is the vertical difference between the pumping water level and the static water level
Efficiency
Is the ratio between the output power and input power
Filter pump
Is an aspirator or vacuum pump that creates a negative pressure on the filtrate side of the filter to hasten the process of filtering
Flow Rate
Describes the rate at which the pump can move fluid through the system
Foot Valve
Is an anti-siphon valve which is installed on the pick-up end of the water pipe near the bottom of the well. Prevents water from flowing backwards out of the pump and well piping when the pump stops operating.
Friction Head
Also called pressure drop. It is the resistance to flow.
Head
Refers to pressure produced by a vertical column of fluid. Also, the height above the suction inlet that a pump can lift a fluid.
Horizontal Pump
Is a pump with the shaft normally in horizontal positions.
Horizonta split-cage pump
Is a centrifugal pump characterized by a housing that is split parallel to the shaft
Hydrodynamics
Is a term generally associated with the science of force exerted by water in motion, such as driving a turbine connected to an electric generator
Hydrokinetics
Is a science of water in motion
Hydrostatics
The science of water at rest
Impeller
The bladed member of a rotating assembly of the pump which imparts the principal force to the liquid pumped
In-line Pump
Is a centrifugal pump in which the driving unit is supported by the pump having its suction and discharge flanges on approximately the same center
Input Power
Is the power that must be supplied to the pump
Kinetic Energy
A thermodynamic property. The energy associated with the mass and velocity of a body.
Mixed Flow
Fluid moves at some angle between radial and axial from the propeller
Net positive suction head (NPSH)
The difference between the pump's inlet stagnation pressure head and the vapor pressure head
Output Power
Is the power actually delivered to the fluid by the pump
Perfect Vacuum
Is a space entirely devoid of gases, liquid or solids
Piezometer
Is a device in a pipe to enable a Bourden gauge or a manometer attached to the ______________ to show the net or normal pressure
Pitot Tube
A device used to measure the pressure of water discharginng from a nozzle or flowing in a pipe by having its open end in the water and the other end connected to a gauge or manometer
Potential Energy
A thermodynamic property. The energy associated with the mass and height of a body above a reference plane
Pressure Head
The height of a column of a fluid of specific weight required to give a pressure difference
Pressure
Is a measure of the force per unit area of resistance the pump can handle or overcome
Priming
Is the operation in which the suction pipe, casing of the pump and portion of the delivery pipe up to the deivery valve are completely filled with the liquid which is to be pumped, so that all the air from this portion of the sump is driven out and no air
Propeller
Is a type of blade that transmits power by converting rotational motion into thrust.
Pump
A mechanical device used to raise or move of a liquids or compress gases using suction or pressure
Slippage
Occurs when fluid is allowed to cross impeller blade through the small clearance that exists between the impeller and casing wall
Specific Speed
Is an index of pump performance at the pump's best efficiency point rate of flow, with the maximum diameter impeller, and at a given rotative speed.
Stuffing Box
Is a means of throttling the leakage that would otherwise occur at the point of entry of the shaft into the casing.
Suction Head
Exists when the total suction is below atmospheric pressure
Suction Lift
Exists when the total suction is below atmospheric pressure
Vanes
Guides the liquid from the inlet to the outlet of the impeller
Velocity Head
Is the enrgy in meters of a fluid stream due to its velocity expressed
Viscosity
Is a measure of the thickness of a liquid
Volute
The pump casing for a centrifugal type of pump, typically spira or circular in shape
Wearing Rings
Keeps internal recirculation down to minimum
Wet Pit
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