A well pump is perhaps the most important component of any well. It is the pump that supplies water from the source to the pipes, ensures its constant flow.
There are many varieties, but today we will focus on screw models, as they have a very interesting design and principle of operation.
1 Features and purpose
Modern well pumps can be surface and submersible. In the first case, we consider a powerful pump with a rotor, which pumps water by sucking it through the working chamber. These devices do not differ in excessive performance and are capable of lifting water at a depth of up to 10 meters.
Submersible pump models are special equipment that pumps water while being directly in a well or well. They are immersed under the water column and left there for the entire time of operation. Submersible models are much more powerful and productive than their surface counterparts.
They are able to work at a serious depth and give out pressure from 50 meters of water column. Feedback from users also suggests that submersible pumps do their job much better, although they are more expensive.
A screw well pump just refers to submersible pumps that are engaged in pumping water from a well. It is called screw due to the fact that the main working mechanism in it is the “Archimedes screw”. It's pretty important nuance, since almost all submersible models for pumping water are equipped with centrifugal elements.
2 Types, characteristics and reviews
If we talk about specific varieties of screw pumps, then there are not so many of them. This is due to the fact that the screw pump itself is a type of submersible equipment.
However, it should be emphasized that screw submersible pumps can still be divided by working depth. According to this parameter, they are divided into:
- Standard;
- Deep.
Standard screw pumps are intended for use in wells and shallow wells. These can be sand wells that extract water from sandy aquifers. Their depth rarely reaches 20-25 meters, and the flow rate is relatively low.
For such conditions, the screw pump is best suited, as it is able to deliver a stable pressure and practically does not react to working with contaminated liquid.
2.1 Popular manufacturers
It is worth paying attention to the manufacturers of screw models of pumping equipment. Moreover, a lot depends on the manufacturer now. Large companies are interested in satisfied customers around the world. Therefore, you should not expect a dirty trick from their products.
Screw pumps Aquarius of the BTsPE series are very popular now. They are practical, productive and at the same time extremely compact. These products can be installed in wells up to 110 mm in diameter, which is an achievement in itself.
Also on the market there are screw pumps from the Belarusian company of the same name. They are renowned for their low cost and build quality.
From foreign manufacturers, it is worth paying attention to Unipump pumps. They cost a little more, but high price offset by extreme reliability and practicality during operation.
2.2 What is the installation technology of screw pumps?
By and large, submersible screw pump models are mounted in the same way as any other downhole stations. Nothing extraordinary is required of you here, although some attention should still be paid.
2.3 How does a screw pump work? (video)
System efficiency autonomous water supply largely depends on the correct choice of equipment, when deciding which is better for the well, it is recommended to listen to the opinion of experts and read the reviews of the owners various models aggregates.
The choice of a submersible pump for a well should be based on an analysis of operating conditions, an assessment technical features water source.
First of all, pay attention to the following characteristics:
- The depth of the hydraulic structure and the maximum possible head of the pumping unit.
- Diameter casing pipe, and the possibility of using the pump based on its overall dimensions.
- Water quality, many pumps are not designed to pump liquids with large quantity mechanical impurities (sand).
- The required performance of the equipment (expenditure characteristics) must meet the needs of all consumers.
Based on these data, you can choose pumps of various price categories.
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Budget pumps
If irregular operation of a well of small depth is expected, then it is quite possible to get by with pumps of an inexpensive price segment. At the same time, it is possible to choose models of domestic and imported production.
Perhaps one of the most popular models of equipment domestic production. The cost of the unit is 5-6 thousand rubles, depending on the configuration and modification. The outer diameter of 102 mm allows the pump to be installed in wells with a cross section of at least 110 mm. The body is made of stainless steel (the main working units of the pump part are brass).
Provides a water lift of 50 meters, the maximum capacity of the installation is 2.4 cubic meters per hour. It is distinguished by reliability and unpretentiousness; when installing in a well, it should be remembered that minimum distance to its bottom should be 60 cm, and the immersion depth should be at least 50 cm.
Ideal for domestic and country needs, can be used all year round, compatible with automatic control systems.
is small in size and minimum consumption electricity (up to 750 W). It can be used to provide water to consumers of various groups, while the maximum flow rate reaches 3 cubic meters of water per hour.
The optimal well depth is 20 meters, while the pump can be mounted in hydraulic structures internal section from 85 mm. A feature of the models of this series is the use of a floating impeller, which makes it possible to increase the reliability of the pump when pumping water with mechanical impurities (sand). The cost of units of this series starts from 6 thousand rubles.
. The products of this brand have always been distinguished by quality and reliability, and this model also belongs to the budget price segment. The pump power of 1.73 kW allows for a flow rate of up to 7.5 cubic meters per hour, while the maximum head is 106 meters.
The unit is equipped with protection against power surges, dry running, which significantly increases its working life. It can be used as part of automated water supply systems, provides filling of various tanks, is considered a universal pump. The average price is 6 thousand rubles.
Costing from 7 thousand rubles, it can be used to supply water with an insufficient degree of purification (up to 150 grams of sand per cubic meter of water). The maximum productivity is 3.3 cubic meters per hour, while the pump can be operated at a immersion depth of up to 30 meters (maximum head 45 meters).
Differs in high tightness, it is easy in service, it can be established in wells, wells, reservoirs of various type.
Medium range pumps
The list of pumping equipment for wells at an average cost is quite extensive, experts advise paying attention to Gileks products. Units with a power of up to 1.1 kW provide a head of up to 115 meters, while the maximum productivity can be 6.9 cubic meters per hour.
The features of the models include the use of a special filter in the design, which allows the use of equipment even in wells with a significant content of sand in the water. During operation, the device does not create vibration loads that can negative impact for well casing.
They have high efficiency, they are reliable and durable, operation and maintenance do not require significant financial costs. The cost of various modifications of water cannons of this brand varies from 5 to 15 thousand rubles.
Quality pumps at a higher price
If you need equipment that can last the entire period of operation of the well, you must give preference to more expensive models.
As a rule, such installations are characterized by high efficiency, reliability, and can be operated in various conditions.
Can be purchased for 27-50 thousand rubles. For this money, you will receive an installation that supplies up to 7.5 cubic meters of water per hour, while the maximum pressure can be 155 meters. Considered one of the most suitable types equipment for providing country cottages.
They can be operated in wells with a minimum cross section (internal diameter from 76 mm). It should be noted that the units of this manufacturer are quite sensitive to water quality. Durability and trouble-free operation are provided by various automatic protection systems (against dry running, overheating, power surges, and others).
None of the owners of Grundfos SQ pumps regretted purchasing these particular devices.
Submersible pump "Pedrollo 4BLOCK 4/14" with an average cost of 23 thousand rubles, it allows the supply of water with a sand content of not more than 150 grams per cubic meter.
Italian traditional manufacturers guarantee high quality equipment, pumps are reliable, can be operated for a long period without additional Maintenance. It is installed in wells with casing with a cross section of 100 mm or more.
They provide a flow rate of 6 cubic meters per hour with a maximum head of up to 88 meters. All main elements of the device are made of stainless steel, equipped with three-phase electric motor, the safety of which is ensured by the tightness of the case and the presence of automatic protection systems (IP68 degree).
Water cannon chastotnik 115/75h belongs to the category of automatic water supply systems, average cost(depending on configuration) is 27 thousand rubles. Provides a flow rate of 115 l / min, a maximum head characteristic of 75 m, can be operated at depths up to 30 m.
Quite easy to use and easy to manage. Automated system allows you to set the required operation parameters (flow rate, pressure in the pipeline, etc.). Allows you to simultaneously ensure the selection of water at several points, is considered one of the most best options equipment to provide country house or cottage. Recommended when it is necessary to ensure a significant flow of water for a long time (baths, saunas, laundries).
Multistage pump submersible pump Wilo Sub TWU 3 differs in traditional German quality, can operate in the mode of up to 20 starts per hour. The main components are made of stainless steel (with the exception of polymer impellers), which guarantees a significant working life of the plant.
It can be installed in wells with a diameter of 75 mm or more, the maximum immersion depth is 60 meters, with a possible head of up to 125 meters. The pump comes with various types motors (single and three-phase), economical and easy to operate, does not require frequent removal for maintenance. The price varies from 29 to 45 thousand rubles.
used to supply water from various sources. Sealed housing provides reliable protection even from dirt. The average flow reaches 4.2 cubic meters of water per hour, the maximum head is 92 m, the immersion depth is up to 25 m.
Equipped with a lower water suction with a built-in filter that provides protection against various mechanical impurities (clay, sand, other inclusions). The impellers are made of special thermal plastic resistant to various aggressive media. It is distinguished by reliability and unpretentiousness, the cost of the unit reaches 22 thousand rubles, which is quite inexpensive for equipment of this class.
The choice of pumping equipment is quite wide, so choose the best model for various conditions operation is simple.
If you do not have experience in this matter, then you should contact a specialist who can evaluate all the features of your well. In this case, the pump will last a long time and trouble-free.
Individual water supply of a private house cannot be imagined without pumping equipment that delivers water to the consumer; for this, several modifications of electric pumps with different operating principles are used. One of popular types is a screw pump for a well, mainly used for water intake from sources whose water basins are located on sand.
Screw (screw) electric pumps, represented on the market by submersible models, are produced by many leading domestic and foreign manufacturers of pumping equipment, their cost does not go beyond the average price for this category of units. To choose the right electric pump, consider several classes with different principle action, while the screw borehole pump under certain conditions has some advantages over other varieties.
Rice. 1 Popular models of screw pumps
Pumps installed for pumping water, depending on the location relative to the water source, are conditionally divided into two groups: surface and submersible.
The first ones are installed on the ground next to the well, a pipe or a pressure hose is lowered into the mine for water intake, while the maximum suction depth (location of the water mirror from the surface soil layer) does not exceed 9 m. technical characteristics with a maximum volume of pumped liquid of 5 m 3 / h and a head of about 50 m, the efficiency of devices is not more than 50%. Usually surface aggregates are included in the package of pumping stations, which are a single unit, in which, in addition to the electric pump, a hydraulic accumulator and a pressure gauge are installed.
Submersible pumps are presented on the market in several varieties with different principles of operation, depending on the design, cost and quality. well water, they are used in household for a variety of purposes.
Rice. 2 The principle of operation and design of a centrifugal electric pump Centrifugal
Centrifugal electric pumps occupy a leading position among other types due to next feature design resulting from their principle of operation - the inlet water flow enters the impeller axis and is displaced by its blades through the nozzle on the side of the casing. Thus, it became possible to connect any number of centrifugal wheels with chambers (stages) in series with an increase in pressure at each stage.
The pressure in household modifications reaches 200 m or more, the throughput is up to 20 m 3 / h, the efficiency increases with an increase in the dimensions of the pump unit and reaches 65% for household high-quality models of Danish and Italian production.
High-quality centrifugal electric pumps from world-famous European concerns are equipped with internal protection against winding overheating in the absence of coolant, have a built-in check valve, expensive models are equipped with an electronic shaft speed control unit depending on the amount of water consumption using pulse-width modulation. This solution makes it possible to reduce the dimensions of pumping equipment, practically eliminating them, as well as save electricity, reducing its consumption by 40%.
The consumer is in high demand for centrifugal pumps from the world's best manufacturers of pumping equipment: Grundfos (Denmark), Pedrollo, Speroni (Italy), Wilo (Germany), Russian brands Belamos, Aquarius, Unipump (manufactured in China). It should be noted that the difference in prices between the products of leading foreign companies and products of Russian or Chinese production is quite significant, a high-quality electric pump from Grundfos costs about 1000 USD, while a domestic or Chinese pump with similar characteristics can be purchased for 200 USD. e.
Rice. 3 Vibrating electric pump - device Vibrating
The manufacturing technology of vibration electric pumps has not undergone significant changes since Soviet times, so there are many Russian brands on the market, there are products of Ukrainian and Belarusian production, and Chinese models are present in sufficient quantities.
The difference between vibrating electric pumps from other types is the absence of rotating parts and, accordingly, bearings, the principle of operation is based on the reciprocating movement of the coil armature when AC is applied to its winding. A rod with a piston that draws in water is welded to the armature of the electromagnet; a check valve is installed near the inlets to prevent the outflow of liquid into the source.
Vibrating models have a rather low efficiency of about 35%, the maximum volume of the pumped liquid does not exceed 1.5 m 3 / h, the head is not more than 80 m.
These characteristics are considered not too high to provide water to a private house with even one person living, therefore, vibrating pumps are mainly used for economic purposes: for irrigating garden beds, filling pools, ponds, different kind water tanks, drainage works.
Since vibrational species are not too sensitive to a high content of suspended particles in water, they are often used for pumping wells and wells, extracting cloudy water with clay-sand fractions from them.
Vibrating pumps are classified as products of the budget price category, their minimum cost is about 20 USD, average price typical high-quality unit 30 c.u. On the market, vibropumps are represented by a large number of domestic (Brook, Malysh, Summer Resident, Aquarius, Whirlwind, Bison) and Chinese (Oasis, Patriot) brands.
Rice. 4 Peripheral pump - design Vortex
In vortex varieties, water is sucked in through the side opening of the hydraulic part of the housing by the blades of the impeller and then thrown out through the discharge pipe located next to the suction channel.
A feature of vortex pumps is the small distance between the impeller of the petal wheel and the walls of the working chamber, which is necessary to reduce hydraulic losses, so the units operate only in clean water. The highest pumping volume of household electric pumps of the vortex principle of operation does not exceed 5 m 3 / h, the pressure reaches 100 meters, the efficiency is not more than 50%.
In vortex models for domestic use the feed wheel is located at the top near the outlet, and the electric motor with a vertical shaft, on which the vortex wheel is mounted, is installed below.
The liquid is sucked in through a perforated filter located around the impeller - by its location in the upper part near the outlet pipe, it is easy to determine the vortex principle of operation of the electric pump.
On the market vortex pumps centrifugal models are less common, domestic manufacturers are represented by the brands Belamos, Whirlwind, Unipump, Italian is popular submersible pump Pedrollo Davis.
Rice. 5 Screw pump - internal organization and screw assembly Screw (screw)
Electric pumps that suck in and push water using the Archimedean screw method are called screw pumps, this is the second most popular group after centrifugal pumps. In household appliances, the screw is located in the upper part and is connected through an adapter to the motor shaft.
The advantage of screw electric pumps is the simplicity of design and the possibility effective work with turbid and dirty water, as well as with viscous media, thanks to the latter feature, screw modifications are widely used in industry for pumping oils and refined products.
Screw electric pumps from world trade leaders (Grundfos, Wilo, DAB, Pedrollo, Speroni) are not on sale, the units are represented by well-known Russian brands Belamos, Jemix, Whirlwind, Unipump Eco Vint, Aquarius, Sturm group of companies.
On sale you can find screw electric pumps and less popular brands of Russian and Chinese production: Host, Alba, Oasis, Patriot, Vodotok, as well as Octopus from the Ukrainian company Varna from Kharkov.
On a note: Distinctive feature vortex electric pumps of domestic production - perforated rectangular holes in the upper third of the body through which water is taken.
Rice. 6 The principle of operation of the screw pump
The principle of operation and design of the screw pump
In a standard auger household electric pump, the working screw is made in the form of a spiral pin made of corrosion-resistant material, which is chrome-plated steel, stainless steel or high-strength plastic. The fluid sucked in by the rotating screw enters the technical polymer cage and is then pushed out into the upper outlet pipe of the electric pump.
A screw electric pump used in everyday life consists of the following main components (Fig. 7):
1 — Electric part with a vertically located single-phase electric motor with a dry rotor and an oil-filled chamber separating the engine compartment from the hydraulic part, a starting capacitor is located inside the lower part of the housing.
2 - The hydraulic part consists of a housing, a water intake filter and a working auger rotating in a holder made of an elastic polymer (rubber) - a screw and rubber coupling assembly pushes the liquid entering the housing through perforated holes 3 to the outlet pipe.
3 - The intake part is a stainless steel cylinder with holes made in the side walls for drawing in water.
4 - On the top cover of the pump, made of brass or stainless steel, there is an outlet pipe and lugs.
5 - The outlet pipe is made with an internal thread standard diameter 1 inch, a check valve and a lifting sleeve are attached to it.
6 - A nylon or metal cable in synthetic protective insulation is tied to the eyes.
Rice. 7 Structural arrangement of the screw pump
Distinctive features and parameters of screw electric pumps
A typical screw pump for wells used in individual water supply has the following technical parameters:
- Power supply voltage: variable 220V ± 10%, with a frequency of 50 Hz.
- Temperature range of pumped liquid: from 0 to 35 °С.
- Pumped water pH: 6.5 - 8.5.
- Working temperature range external environment: from 0 to +40 °С.
- Minimum immersion depth under the water mirror: 0.5 m.
- Permissible volume of mechanical particles in the pumped water: - no more than 500 g/m 3 , the content of fibrous materials in the liquid is not allowed.
- Permissible diameter of mechanical fractions: - 1 mm.
- Maximum pressure: 3 m 3 / h, for most models it does not exceed the threshold of 1.5 m 3 / h.
- Limit head: up to 200 m, this indicator is a rare exception, most modifications create a head pressure of no more than 100 m.
Rice. 8 Key Features of Chinese Oasis The main advantages of screw electric pumps:
- Low cost, the price of the cheapest models is about 80 USD, in general, all models are cheaper than centrifugal types.
- Simplicity of design. The working part consists of a screw and a rubber cage, they are easy to maintain and, if necessary, simply replace, which makes the repair of auger units very simple.
- A screw pump for a well, due to its principle of operation, can transport liquid with large fractions of sand and clay deposits - this is its main advantage. A submersible screw pump is preferably used for water intake from well sources on sand, often with a high content of suspended particles of clay and sand. Although their details are subject to mechanical impact particulate matter, the life of the screw pump in turbid sources will be higher than that of centrifugal models.
The disadvantages of screw units include the mediocre quality of many products (chrome-plated screw, quickly abraded clip) and not too high technical characteristics, noticeably inferior to centrifugal types, as well as low efficiency, not exceeding 45%.
Application area
We can say that a screw pump for a well, due to the ability to pump out dirty water, is the leader in the number of areas in which it is used in household chores. A screw borehole pump is purchased for:
- arrangement of water supply for cottages and wells;
- filling artificial ponds, pools, tanks for heating and drip irrigation;
- irrigation of vegetable gardens, orchards and any areas with plants in the garden;
- drainage in case of flooding of basements, cellars and basements in the house;
- pumping wells after drilling, some professionally engaged firms specifically purchase screw pumps for this purpose;
- cleaning wells and wells from silt deposits.
Rice. 10 Parameters of screw pumps of the Unipump Eco Vint series Well installation rules
To immerse a screw electric pump into the well, either an adapter is used, to which a cable is tied and a water supply pipeline coming from the unit is attached. It is common to tie the pressure hose, power cable and retaining cable together before diving with electrical tape or plastic ties when installing, observe the following rules:
- Lifting pipes can be selected from low-pressure polyethylene (HDPE), steel or flexible elastic polymers, the main condition is the ability to withstand the maximum pressure in the system and an internal bore diameter not lower than the thread size inside the outlet pipe.
- When using a flexible hose, make sure that there are no kinks or twists.
- For lowering and lifting, use only a nylon or metal (stainless) cable, it is forbidden to hang the unit by an electric cable.
- Before diving, you should make sure that the inner diameter of the casing string is higher than the outer dimensions of the pump casing together with the electric cable, and that the pipes do not have bends and narrowed sections.
- It is not recommended to place the power cable in a coiled coil - this leads to its overheating and melting of the insulation.
- The minimum distance of the pump from the bottom of the well is 0.5 meters, the optimal distance is 1 m.
- It is forbidden to operate the pump on a closed tap - this will lead to its failure.
- Mandatory installation in the control system, even if there is an internal protective automation against overheating of the winding.
- When installing modifications that do not have a built-in check valve, it is installed on the outlet pipe in front of the water-lifting pipeline.
Rice. 10 Scheme of installation and connection of the screw unit
When comparing which borehole pump is better: centrifugal or screw, there is no definite answer, since the scope of these pumping units is slightly different. Screw electric pumps are usually used in situations where you have to work with contaminated water, while due to their relatively low specifications, the well should have a shallow depth or be located closer to the individual house. It is impossible to find European-made screw pumps on the domestic market, all goods are supplied in trading network domestic and Chinese firms, so user reviews regarding the quality and materials for the manufacture of screw units are controversial.
Screw pumps are one of the ways to solve the problem of water supply, which is suitable for a private house, a small farm. These unpretentious devices become the only way out if there is a lot of sand in the well. Equipment of this type works even when the well is very sandy or silty, it lifts water with sand, as well as sand with water, without breaking or clogging. Therefore, for weak wells, Abyssinian wells screw pumps for water reliable option, which depends little on the state of the source.
One of the types of screw pump in the context
Advantage of screw pumps
The ability to pump water with a large number of inclusions is provided by the special structure of the inside of the device.
To understand how a borehole screw pump works, it is enough to consider a conventional kitchen meat grinder, where the main part - a screw or auger - rotates and promotes minced meat or other consistency. In the pump, it is placed in a rubber sheath, connected to the engine by means of a cardan shaft. Devices designed for pumping large volumes have rigid shells and are able to withstand significant pressure. 
When the shaft rotates, the screw moves, which follows the developed trajectory - the turns of the screw and the rubberized inner surface form cavities that constantly rise to the supply hose or pipe.
The liquid moves into the chamber, the pressure forces it to continue moving upwards, rarefaction areas continue to form in the inlet pipe, which ensures a uniform supply of water from the well.
The design eliminates the reverse movement of water, and also allows the mechanism to cope even with viscous inclusions (this expands the scope of the device - it is used for pumping various substances with varying degrees of viscosity)
If you carefully examine the sample (or, again, a meat grinder), you can see that sand or other inclusions have nowhere to get stuck or linger - they rise along with the liquid flow.
This design gives undeniable advantage before equipment for moving water of vortex and centrifugal types, since it is screw pumps for wells that prolong the life of a water source and ultimately save a significant amount.
According to the classification, screw pumps are self-priming devices with a multistage structure. The developed lines of compact models make viable even weak wells with a minimum diameter.
The choice of the optimal equipment is influenced by where it will be installed. For installation in a well, samples are suitable that are attached to the wall of the well shaft.
When installing in a well, it is easier - you need a sample with a strong cable. For the home, a model designed for standard voltage is suitable.
Types of screw structures
Such devices are single-screw or multi-screw. For individual use, a single-screw design is usually used, this is enough to provide a house or a small household with water.
To in drinking water there was no sand, a coarse filter with a cell is installed on the inlet pipe, which traps particles with a large diameter
In the figure, the filter is already put on the pump
If necessary, the resulting water is filtered - subjected to fine purification.
Water analysis is carried out to determine the need for additional filtration.
Rules for the operation of the screw pump
In addition to stable performance, independent of water quality, the borehole screw pump allows self-installation.
An internal structure in which there is literally nothing to break, along with quality materials get rid of worries about solving the problem for a long time - the screw version has been working for at least 10 years, without reminding of itself and without requiring much attention.
- The screw pump for the well is cooled during operation - this is done by the pumped liquid. Thanks to this, the screw moves smoothly, no additional seals are required. The engine is located below the inlets, this protects it, natural cooling occurs
- In addition, the design makes the operation of the device almost silent - it is not audible, even if the well is located within the house
- The well will keep working longer, as there is no vibration that affects the source
- Even in case of breakdowns and malfunctions, it is quite possible to replace parts on your own - the design is so simple that a person without special skills can do it
- A screw submersible pump can work not only in wells - there are no requirements for the position of the device: it is located horizontally and vertically. This allows you to freely use it when pumping water from rivers, reservoirs, other containers and sources.
Disadvantages of screw pumps
With versatility and incredible reliability, screw pumps have disadvantages - a very short list:
- A durable screw well pump is expensive - there are cheap options, but their cheapness is relative. This is due to the technological complexity of its production.
There are affordable models, but they are short-lived - for one or two seasons, so if you plan to install for a long time, it is better to consider the products of firms, Russian or foreign with a price of $ 200 and appropriate quality - An idle screw pump for a well is not able to work - it will fail
- The amount of liquid supplied cannot be adjusted.
Downhole installation
Installation screw pump into the well is standard, there are no special features. This is an elongated cylinder with a cable in the upper part, connected by a power cable, depending on the design of the cables, there may be several. A hose or pipe for supplying water of the appropriate length is attached to the outlet pipe.
When installing, the depth at which the submersible screw pump will be placed is calculated; after measurements, a mark is placed on the cable or cable.
Some pumps are equipped with float switches, so before installation, you should study the instructions, if it is provided, connect it.
It is important to securely fasten the cable, if the equipment breaks and falls into the well, it will be difficult and expensive to get it
indicator correct installation is quiet operation, without noise, vibration, knocking.
Brief overview of screw pump manufacturers
Almost all manufacturers have a range of electric pumps of this type.
- The products of the Ukrainian manufacturer "Aquarius" are popular. Narrow, suitable for wells with a small diameter (at least 10 cm), relatively inexpensive. Withstands use in harsh environments
- "Belamos" (Belarusian brand) - stainless steel models, often equipped with additional thermal protection of the engine. You can use a device with any power. There are options suitable for small casing diameters
- Unipump (Chinese manufacturer) is a cheap, reliable option for springs and wells where low performance equipment is recommended. Even if at the same time a well or a well gives water with a large amount of sand and impurities, this does not have any effect on the operation of the pump. This is a well-known company whose goal is to provide consumers with affordable workable equipment. Judging by customer reviews, in most cases the manufacturer succeeds
- Grundfos is an expensive brand under which quality equipment is supplied. There are models with a diameter of 75 mm or more, suitable for low-productivity wells and wells, they pump water up to 55 meters. Other screw pumps are presented, capable of operating in various wells with different capacities.
Conclusion
If the water in the well Bad quality, with sand and silt - a submersible screw pump will solve the problem. It is able to lift water with sand without failing at the same time, and is also used to clean silted and clogged wells.
Buying not even the cheapest screw equipment will cost less than drilling a new well.
In individual housing construction, when building a water supply system, surface pumps are used for a well for water and for a well. When a water supply system is built on the basis of a well, pumping stations equipped with a relay unit and a membrane tank allow you to build a system with quick-detachable equipment. Such equipment can be used seasonally, or you can even put it under lock and key every time you leave the country, or take it with you.
In the case of using a well, a similar usage pattern can also be built. However, it has a number of features that should be considered when using surface stations as pumping equipment.
Into the well, in view of it design features, water from the sandy aquifer enters gradually. The main volume of water in the well is from 4 to 20 tons. This amount of water allows solid impurities to settle to the bottom. In the subsurface layer, well water is relatively free of solids.
In a well, the situation is somewhat different. In the cavern of the well, with increased pumping, water enters from the aquifer with a large pressure. The volume of the cavity is small, because the sand brought by water has virtually nowhere to settle. Sand is sucked up by pumping equipment.
In which wells can a surface pump be used?
One more moment. In deep wells, a surface pumping station will not work. For these purposes, a submersible borehole pump is more suitable. The surface station can be used in shallow wells, comparable in depth to ordinary wells - 8-12 meters. We must not forget that just like from a well, from a well you need not only to raise water, but also to supply it to the house, sometimes to the second and third floors.
We discussed the difference between a shallow well and an ordinary well in the previous paragraph. It turns out that at the same depth in the same area, the well will not “give out” water with sand, but the well will. We will have to select a pumping station for the well, which is guaranteed to work in such conditions.
Now let's move on to the question of which pump is best for a sand well in these conditions. It is worth stopping at the option that has the following characteristics:
- Increased capacity to allow scheduling a 20-30 percent redundancy for adverse conditions.
- Increased throughput and, as a result, increased cross-sections of all through holes and pipelines.
- Basic equipment of a dry-running relay in case of clogging of the sand filter.
- Sand filter complete with built-in separator.
- Possibility of easy replacement of the filter on the supply pipeline.
Not every pumping station suitable for working with a tubular well, the trunk of which is saturated with sand. However, almost any station can be used by providing its supply line with a sand filter and inserting an additional filter with flushing between the electric motor and the membrane tank.
Why can't a washable filter be used in front of the station's electric motor? Because in this case, a clogged filter will reduce pressure and eventually the engine will burn out.
Why is it necessary to put a washable filter in front of the membrane tank? Because if you put a filter after the tank, after 1-2 months of operation you will have a non-working membrane tank completely clogged with sand.
The washable filter is good because it can be cleaned by draining the pulp (sand with water) through the drain hole with a tap. Filters with a transparent housing now available allow you to visually monitor the condition of the filter and the amount of sand deposited in it.
If you choose too fine mesh, the pump motor will not be able to create the necessary pressure in the water supply system behind the filter.
Of course, the cost of a washable filter is an order of magnitude higher than that of filter replacement elements. But it does not need to be changed, it is enough to wash it.
The cost of the simplest washable filter starts from 1500 rubles.
Which surface pumps can be used
So, surface pumps for a well for water with sand must be of increased power, must have a sufficient electric motor resource and must be equipped with a sand filter. Surface pumps for wells for water with sand can also be additionally equipped with washable filters that protect the station itself and plumbing system houses where water enters the tapping points.
For advice on surface pumps for use in shallow wells, .
Submersible pumps in sand wells
A few words about submersible pumps that can be used in deep wells. What is the best pump for a sand well? One that is able to "digest" water with sand and supply it upward to the water pressure unit. Already here, at the top, it is possible to organize filtration and removal of sand from the water coming from the submersible pump.
There are domestic and imported pumps on sale, which are designed to work in such conditions. Several types of Aquarius pumps, and the well-known Brook, are capable of supplying water with sand to the surface without harm to themselves.
Why not put a sand filter in front of a submersible pump in a well? Because in case of clogging, you will have to raise to the surface both the filter and the pump, and 8-10 meters of the supply pipeline.
In the case when the filter element is on the surface, it will be enough just to rinse it.
Well pumping
Another case when you need a pump that can "digest" water with sand is pumping any well after drilling. At this moment it happens final formation well caverns, and for further successful use, its pumping is required.
How to choose sand from the well at this stage? The best option- Pump out. Can be used surface station if the well is shallow, or a submersible pump. If the well has a depth of 15-20 meters.
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