What well conditions possibly limit the capacity of the pump?
How does the diameter of a cased deep well and pumping level of the water affect the capacity?
If there are no limiting factors, How is capacity determined?
What is Suction?
What is Atmospheric Pressure?
How much is the pressure due to atmosphere?
What is maximum theoretical suction lift?
What is a shallow well or suction type pump?
How does friction loss affect suction conditions?
How is water discharged from a reciprocating pump?
What are the factors limiting the height or distance water can be discharged?
When and why do we use a Deep Well Pump?
How are Shallow and Deep Well Pumps similar?
What do we mean by Water System?
Why is it necessary to maintain a volume of air in a tank?
What is the purpose of a Foot Valve?
Name the Two Principal Component Parts or Assemblies of a Jet System.
Name the Two Basic Parts of a Jet Assembly?
What is the function of a nozzle?
What is the purpose of the diffuser?
What do you mean by driving water?
What is the source of the driving water?
What is the purpose of the centrifugal pump?
Where is the Jet Assembly usually located in a Shallow Well Jet System?What is the principal factor which determines if a Shallow Well Jet System can be used?When is a Deep Well Jet System used?
How does the function of the Jet Assembly used in a Deep Well System Differ from that of a Shallow Well system?
Can a foot valve be omitted from a deep well Jet system? Why?
Rate of flow from the source of supply, the diameter of a cased deep well and the pumping level of the water in a cased dep well.
Limits the size pumping equipment, which can be used.
Maximum number of outlets or faucets likely to be in use at the same time with minimum flow of three gallons per minute per outlet.
A partial vacuum created in suction chamber of pump obtained by removing the pressure due to atmosphere, there by allowing greater pressure outside to force something (air, gas, water) into the container.
The atmosphere surrounding the earth presses against the earth and all objects on it, producing what we call atmospheric pressure.
This pressure varies with elevation or altitude. It is greatest at sea level (14.7 lbs. per square inch) and gradually decreases as elevation above sea level is increased.
Since suction lift is actually that height to which atmospheric pressure will force water into a vacuum, theoretically we can use maximum amount of this pressure 14.7 lbs. per square inch at sea level which will raise water 33.9 ft. From this, we obtain the conversion factor of 1 lb. per square inch of pressure equals 2.31 ft. head.
A pump which has its suction or vacuum chamber in the pump. Therefore, it must be located within the vertical distance to a source of water which can be overcome by atmospheric pressure.
The resistance of the suction pipe walls to the flow of water uses up part of the work, which can be done by atmospheric pressure. Therefore, the amount of loss due to friction in the suction pipe must be added to the vertical elevation, which must be overcome, and the totalof the two must not exceed 25 ft. at the sea level. This 25 ft. must be reduced 1 foot for every 1,000 ft. elevation above sea level, which corrects for a lessened atmospheric pressure with increased elevation.
The piston or pistons push the water out through valves.
The strength of pump and the amount of power available. This is usually shown in catalog as maximum pressure available with particular size motor.
When the water level is more than 25 ft. below the pump, because this is the maximum practical suction lift, which can be, obtained with a shallow well pump at sea level.
Both have water end and power ends separately, both depends on same principles of operation.
A pump with all-necessary accessories, fittings, etc., necessary for its completely automatic operation.
The purpose of the tank is to provide storage which will permit the pump to run for a longer periods of time and at less frequent intervals. Since water cannot be compressed, a volume of air is necessary in the tank. The water entering the tank and conversely the expansion of the air forces out of the water compresses the air.
It is used on the end of a suction pipe to prevent the water in the system from running back into the source. Of supply when the pump isn't operating.
Jet Assembly and Centrifugal Pump.
Nozzle and Diffuser.
The nozzle converts the pressure of the driving water into velocity. The velocity thus created causes vacuum in the Jet Assembly or Suction Chamber.
The diffuser converts the velocity from the nozzle back into pressure.
The water which is supplied under pressure to drive the Jet.
The source can be traced to the enclosed system of the pump body or in the Jet Assembly.
It provides the energy to circulate the driving water. It also boosts the pressure of the discharged capacity.
In the casing of the centrifugal pump.
If the distance between the water level and ground level is less than 25 feet.
If the distance between the water level and ground level is greater than or more than 25 ft.