How to choose a surface pump for the well - the characteristics and types

It chooses well, most land owners as a water source for the equipment of autonomous water supply system.One of the main issues that must be solved - what type of pump, in this case more appropriate and on what criteria to make a choice?Consider the option of using the models of surface pumps.

Before you understand the specifics of the use of this type of equipment, it is necessary to point out some of the design features of such products.The name suggests that they are not immersed in the "body of water" (of these pumps, we wrote here), and are set next to him.Pumping of water occurs by its absorption by immersion sleeve with subsequent delivery to the point of demand.But depending on the engineering solution realized principle of mechanisms depending on the species varies.

General features

• versatility in application.When selecting a pump borehole diameter is not a determining parameter for a submersible.
• great performance.According to this characteristic, they are superior submersible counterparts;values ​​of their efficiencyhigher.
• limitations in the application due to the fact that the maximum depth of water intake does not exceed 6 - 9 m (not enough power).

the Internet you can find statements that work with the well such models can not.This is not entirely true.they are really not suitable for artesian springs.But in the private sector mainly developing are well on sandstone, which lies within the depth of 6 - 12 m. Therefore, surface pumps are well suited for these water sources.The main thing - to make the correct calculations and choose the appropriate model.

• no absolute seal the case.Therefore, during installation, consider the question of the protection of the pump from rain.In use throughout the year or settling caisson (with warming), or the unit is set in one of the outbuildings (cellar, barn, outbuilding).

• small weight and size.

But for many owners is the most attractive is the fact that the pump is mounted on the surface, next to the well.

First , it greatly simplifies the visual control of the operation, periodic maintenance (in some models it is provided) and, if necessary - repair.

Second , if the product is installed in the area that do not require year-round water supply (eg, house), it is easy to disassemble and move into the house until the next season.

We will not recommend any kind of surface pumps or advertise specific models.Each decision is made by myself, in accordance with the conditions of use of the product.But that choice was correct, it is necessary to know something about these devices.The only clarification - for wells, horizontal type pumps are not used, only the vertical, since the direction of fluid motion - upward.

Types of pumps Centrifugal surface

Pros : able to operate smoothly even if the system was "airing", the formation of "plugs".

Cons : in the case of heavy contamination of the liquid quickly fail.Therefore, a mandatory should be provided by filtering water flowing through the suction pipe.The noise level higher than that of counterparts.

Self-priming centrifugal same, but having in its composition an ejector.This increases efficiencyproduct.If ejector internal, the water can be raised by about 5 - 6 m. With external its location increases the rate of 25 - 30 m. Although such models are used less frequently due to the fact that most of the individual buildings are rarely more than two floors.The presence of the ejector increases water intake depth.

Price - 2400 rubles (capacity - 0.4 kW).

Vortex

Pros : able to create more pressure on the system than the previous model (from 3 to 7 times), as the powerful centrifugal.It is advisable to use, if the length of the route is quite large.Noisy much less.

Cons : as a rule, efficiencyless than 45%."Afraid" suspensions contained in the liquid, so the only work reliably with absolutely clean water.they are more "picky" in this regard.It is therefore particularly effective filtration must be provided.So you have to constantly monitor the state of the well and often clean it from silting products.

choice may not be limited to the selection of certain technical characteristics.It should also focus on the features of the execution of a particular model and specificity of use.

Price - 2100 rubles (power of 0.37 kW).

What to consider when choosing

Housing material

It can be plastic, "stainless steel" and iron.It is clear that in the first case of mechanical security products is much worse, but if the pump is installed on all the rules, then the product is better, as less weight and price it below.Water temperature is not important (for the plastic limit - up to 50 C °), since the hot liquid from the wells is not received.

Performance

calculation needs to be done "to the maximum".That is, if a particular pump is able to supply water at the same time all the delivery point (provided that all valves are open) without drastically reducing its pressure?

Created water pressure

This has already been partially written.It is necessary to take into account the particular configuration of the water supply line.

Fitting

understood the distance at which the pump will defend the well.water extraction depth is reduced by about 2.5 - 3% based on the interval of 1 m.In other words, the greater the length of the route, the less the depth of the pump can pump water, and vice versa.