The current level of progress has allowed residents of villages, suburban cottage settlements and owners of cottages to organize a convenient and efficient water supply system for a house based on a well or a well.
Now there is no need not only for buckets, but also for overall containers, usually placed in the attic. Knowing how to choose a
pump for a well, you can assemble a
pumping station and fully automate the process of obtaining water from an underground source. The selection will be discussed in this article.
Basis of choice
Before you go to the store for a purchase, you need to decide on some key points that serve as the selection criteria. We list them:
- the distance from the well to the tap. Since there is a certain pressure loss per meter of pipeline length, this value cannot be ignored;
- available volume of water. You should also determine the debit, i.e. empirically find out for how long a well or well is being filled. Obviously, there is no point in acquiring an overly efficient pump with a small volume of water and a small inflow - everything should be balanced;
- depth from the surface of the earth to a mirror of water;
- estimated consumed volume. It must not exceed debit.
All these data are enough so that, if necessary, the consultant can help determine the choice of the necessary modification of pumping equipment.
How to choose a pump for a well
All existing solutions for supplying water from underground sources can be divided into two types - submersible and surface. The design of the first involves the placement of the device in the water column suspended on a special cable. The second, in turn, are not sealed and, if moisture enters the motor windings, can fail. In addition, the principle of operation and the capabilities of each device are different. For example, household submersible pumps can be vibratory (the most inexpensive option), screw (compromise design) and centrifugal. The superficial cannot boast of such abundance. Therefore, telling how to choose a pump for the well, we will talk specifically about submersible models.
All such pumps have only two main parameters that affect the operation of the entire system - these are nominal head and capacity. Peak values are interesting only from the point of view of a certain "margin of safety" - continuous operation in such modes is not recommended. When studying the question of how to choose a pump for a well, it is worth paying attention to the fact that the two above characteristics significantly affect the total cost of the device.
Therefore, in some cases it makes sense to change the supply scheme (for example, organize a well for a hydraulic accumulator) without overpaying for a more efficient pump.
Submersible pumps for wells. Selection by parameters
Suppose that the distance “surface - water mirror” is 16 m, and to the draw-off point (horizontal) - 20 m. Some abstract submersible pump, presented in the store, is capable of dispensing 2500 liters per hour at a pressure of 60 meters. We consider the pressure loss: 1 Atmosphere corresponds to a rise to a height of 10 m, and along the horizontal line - 10 times less.
For this model, with its 60 m, the pressure at the outlet of the pipeline will be 60-16-2 = 42 m or 4.2 Atm. Given the transitions and bends, in the end we get 4 Atm. Since 3 to 4 Atmospheres is considered the norm, this model is quite suitable.
The amount of water supplied can be calculated using the schedule attached to the data sheet. Having determined the loss (16 + 2 = 18 m), it is necessary to draw a line from this point to the curve on the graph and from the intersection point - perpendicular to the other axis. Get performance.