SUBMERSIBLE PUMP FOR SALE at M Bond Pumps
M Bond Pumps has an extensive range of submersible pumps for sale cape town. Please feel free to contact us for all your pumping requirements today. South Africans have trusted M Bond Pumps our 22 years experience in supplying a range of pumps.
M Bond Pumps offers you free advice on a solar pump, borehole pump, or a drainage pump, please feel free to contact us. M Bond Pumps has extensive experience in water pumps including centrifugal pumps and swimming pool pumps.
SUBMERSIBLE PUMPS CAPE TOWN
WHAT IS A SUBMERSIBLE PUMP USED FOR?
When the phreatic water level or an artificial water level is lower than that of the surrounding land level, water will need to be pumped out or up, to a higher point. Common scenarios where such pumps are used, include sewage wet well sumps, storm water collector sumps, seepage water at construction sites or ground water infiltration into underground car parking garages. The list of application is vast.
In these instances, instead of placing a centrifugal pump at the top level and forcing the pump to suck water out from below, it is easier and more cost effective to lower the entire water proof pump into the water body. By doing this, one can ensure that the NPSH capability of the pump is never a constraint to the pumping requirement.
Submersible pumps typically have low pressure head capabilities and high flow rates. An example of this is a fish pond pump, where relatively large amounts of water are circulated, at low heads of only a few meters.
WHAT SIZE OF SUBMERSIBLE PUMP DO I NEED?
The size of pump you require, is based primarily on your application. To determine the size of pump required, one needs to be able to answer two questions. Firstly, what is the flow rate that is required for the system to operate efficiently, and secondly, what is the pressure head required for the system to perform as expected.
With metric units, flow rate (Q) is typically measured as litre per second (l/s), litre per minute (l/min), or litre per hour (l/hr). For larger pumps, the flow rate is expressed as metres cubed per hour or cumecs. (m³/h).
Pressure head, on the other hand, is the height that water is required to be pumped to. This is measured in meters (m). A somewhat oversimplified approach to calculating head, would be to measure the vertical distance (Static head) from the top level of the bottom water body being pumped, to the required height of the discharge point. Remember to add a 10 – 20% allowance for frictional losses, and the result would be the pressure head required from the pump.
It is convenient to note, that a 10m rise, would equate with an approximate 1 bar pump pressure head, or 100kPa.