give me information about submersible water pump, its principle, construction and other necessary details?
July 9th, 2009 | 
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A Submersible Water Pump firstly must be very well sealed to prevent water to come into contact with the electrical components. All submersible pumps are centrifugal pumps with one or several impellers( depending upon the volume to be delivered and the total dynamic head-or height it must be lifted). These pumps are available in fractional HP up to large HP. They are commonly used to empty a flooded area or to provide a water supply to a home or even a municipality.
Most are of cast iron construction and the higher end ones are stainless steel. Pumps used for private or public water supply usually have brass or bronze impellers. Others used for sewage or removing flooded areas can have cast iron impellers. Some pumps used for sewage have a large opening and can pump solids up to 2" in diameter. Others are fitted with a set of "teeth" to shred solids before pumping them. Single phase pumps are somewhat troublesome under extended use–they tend to blow out capacitors. Three phase pumps work very well and are much easier to maintain.
If the pump is to turn on and off automatically–a float system is usually used to "trip" on or off according to the water levels.
One major problem with outdoor submersible pumps is they are very suceptible to lightening strikes.
Posted in Submersible Water Pump
A submersible water pump firstly must be very well sealed to prevent water to come into contact with the electrical components. All submersible pumps are centrifugal pumps with one or several impellers( depending upon the volume to be delivered and the total dynamic head-or height it must be lifted). These pumps are available in fractional HP up to large HP. They are commonly used to empty a flooded area or to provide a water supply to a home or even a municipality.
Most are of cast iron construction and the higher end ones are stainless steel. Pumps used for private or public water supply usually have brass or bronze impellers. Others used for sewage or removing flooded areas can have cast iron impellers. Some pumps used for sewage have a large opening and can pump solids up to 2" in diameter. Others are fitted with a set of "teeth" to shred solids before pumping them. Single phase pumps are somewhat troublesome under extended use–they tend to blow out capacitors. Three phase pumps work very well and are much easier to maintain.
If the pump is to turn on and off automatically–a float system is usually used to "trip" on or off according to the water levels.
One major problem with outdoor submersible pumps is they are very suceptible to lightening strikes.
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