Water system can be organizeda whole group of pumps of different types. Some units will carry out the suction of water, others power support pressure, others perform lifting and distribution. Of course, such a number of installations is rare and, as a rule, users tend to organize water supply with the help of a single unit and additions in the form of a hydroaccumulator. In this case, some tasks in the system it is advisable to assign individual devices. In particular, a circulating pump for water supply facilitates the pumping of water on a specific circuit and in a given direction. This feature makes the system more productive and more efficient.
Features of models for water supply systems
Circulating pumping units canintegrate into both the heating system and the water supply infrastructure. As a rule, the differences between these categories of pumps are only in the materials of manufacture. Heating circuits require plastics and metal components that can withstand increased thermal loads. In turn, the cold water supply is organized and does not take into account such requirements. If the circuits also provide for the circulation of the hot coolant, then the temperature limits are initially calculated - but in this case, the levels of peak values of heat resistance will be incompatible with heating utilities. There are also universal models in case the possibility of functional reorientation of equipment is envisaged. Such plants are able to withstand the temperature of the coolant on average up to 100 ° C.
Types of pumps
The main classification involves the separationmodels by the method of the location of the rotor. In this sense, the aggregates of "wet" and "dry" actions stand out. In the first case, the principle of operation of the circulating pump for water supply will include the lubrication of moving structural elements and surfaces at the expense of the coolant itself. Such equipment has a simple design that does not require special care and does not emit noticeable noises in the process. But because of low productivity with an efficiency of about 40%, such models are not very popular.
Dry action devices are built ona system in which the rotor mechanism is completely isolated from the coolant. As insulators can act sealing parts and seals. Therefore, from the point of view of the influence of the pumped medium on the details of the construction, it does not matter which circuit is serviced - with cold water supply or heating. Lubrication is carried out in a separate order by the user. For pump rotors special technical oil is intended. As a result, equipment efficiency rises to 70%.
What to consider in the choice?
In the selection of the circulation pump model, the mainattention is paid to working qualities. They are expressed in three parameters - power, pressure and performance. If the unit is selected for home use, then you can make a choice among models with a potential from 20 to 70 watts. This is a small amount, however, it will be enough for servicing small domestic needs. In other cases, equipment with a capacity of 100 to 600 W is selected for complex water supply to production facilities or apartment buildings. In turn, the head is responsible for the possibility of lifting the carrier and the feed rate. Obviously, this indicator will be affected by the same power of the circulating pump - for example, a minimum level of 20 watts is capable of providing 10-meter head.
However, a direct link to build between theseParameters are also not worth it, because performance can adjust these values. Performance refers to the volume of water pumped in 1 hour. For example, a power of 20 watts can provide about 2.5 m3 / h, and 600 watts - about 30 m3 / h. In this case, the pressure they may be the same. Together, these three characteristics will give an idea of the most appropriate device for specific purposes.
Manufacturers - whom to prefer?
Manufacture of circulating pumps involved the largest manufacturers of engineering and construction equipment. In particular, the models of the following companies deserve attention:
- Grundfos is one of the oldest companiesspecializing in the manufacture of pumps. The most interesting are the ALPHA, UPS and MAGNA model series. The average power of pumps is 30-150 W with a pressure of 4 to 10 m. Among the shortcomings there is a high cost (15-30 thousand rubles), although there are practically no alternatives to the quality and ergonomics of these products.
- Wilo - German company, in the assortment of whichYou can find low cost circulation pumps for water supply with a price tag of up to 10 thousand. The attention is worthy of the Star-RS and Yonos line, the advantages of which include the provision of automation and the presence of metal-graphite bearings.
- "Dzhileks" - Russian manufacturer, pumpswhich can also be considered as budget decisions. The range of circulation units form the "Circle" model in various versions with a capacity from 60 to 245 W and a pressure of 3-8 m.
Installation of the circulation pump
Installation is carried out only after washing.contours of the water supply system. Make sure that no sediment is left in the pipes. It will also be useful to perform pressure testing by checking the tightness of the line. Directly the installation of the circulation pump is carried out by attaching to the supply or discharge pipe. Fixation can be done both in closed and open circuits. After that, before the installation site, you must install two shut-off valves. They will be required in case of repair work to temporarily stop the circulation of water.
First start
The launch organization has its own nuances.Especially in the case of “wet” mechanisms, it is not recommended to open the circuit if the pump itself was not pre-filled. Also, models with “dry” rotors do not tolerate harsh loads - in the first place, such filling negatively affects the sealing elements, the wear of which will lead to a violation of the tightness of the structure. Therefore, before opening the central supply valves, the circulating pump for water supply should be separately filled with coolant.
Airing the canal
Mandatory procedure prior tofull operation of the pump, is and vozduzhdushivanie. In essence, this operation involves the removal of air from the pump and pipe circuits. To do this, the system should be completely filled with water, opening in the lines all the existing primary air vent valves. In this mode, the circulation pump for water supply should last 5-10 minutes, after which it turns off for a minute, and then the operation is repeated again.
Finally
To organize stably working andconvenient to manage the water supply system will only help correctly selected pumping unit. It is desirable, in addition to the primary working parameters, also to take into account the materials of manufacture, so that the equipment lasts as long as possible. In addition, a modern circulating pump for a private house is equipped with automatic control systems. Their presence, of course, affects the price tag, but it gives a lot of advantages to the consumer. Controllers and sensors in water supply systems are not only a solution to the issue of convenience and ergonomics, but also an increase in the safety of communications.
