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Selection of pressure boosting pump installation for water supply systems. When is it necessary to install a pump to increase water pressure? Installing a pump in an apartment

Selection of pressure boosting pump installation for water supply systems. When is it necessary to install a pump to increase water pressure? Installing a pump in an apartment

“Over the entire period of operation, our company has produced a huge number of pumping stations, fire extinguishing and pressure boosting pumping units. They all work as in systems automatic water supply, as well as fire extinguishing of industrial and residential buildings, towns and many others. A qualified approach and technical support for each piece of manufactured equipment throughout the entire operating cycle allows us to achieve excellent results in his work at customer sites."

Design and principle of operation

Water pressure booster installation - pump equipment designed to create a reliable water supply system. As a rule, such equipment includes: a group of identical pumps, supply and pressure manifolds, a storage hydraulic tank, an automatic control cabinet, pipeline accessories(valves, gate valves, etc.), as well as pressure sensors and dial gauges. The main task of the installation is to implement the established algorithm for maintaining pressure in the pressure manifold, which ensures maximum operating efficiency. There are also hybrid water supply and fire extinguishing installations, which combine these two operating functions.

All produced pumping stations and installations are capable of solving water supply problems of any complexity and volume.

Operating instructions and specifications pumping units can be found in the corresponding sections of our website.

Possible operating modes

  • Continuous mode - one or more pumps are constantly in operation for a long period of time;
  • Periodic mode - maintaining the level in the tank;
  • Uneven mode - maintaining a given pressure at variable flow;
  • Short-term mode - operation in the “Fire extinguishing” mode (for hybrid systems).

Structure

  • Suction (input) manifold;
  • Hydraulic accumulator tank at the outlet;
  • Pressure manifold;
  • Group of identical pumps;
  • Automatic control cabinet;
  • Valves and gate valves.

Synonyms

  • Booster pumping station.

Fire extinguishing pump stations

Design and principle of operation

The equipment is used in fire extinguishing systems to eliminate fires. The operating algorithm of fire extinguishing installations and stations is based on the principle of starting the main pumps or a jockey pump (a pump with a small capacity to compensate for leaks) subject to a drop in pressure in the pressure (fire) pipeline and (or) the presence of a signal from the control unit. If in fire extinguishing mode the pressure in the controlled pipeline exceeds the set value, the pump stops. If there is a subsequent drop in pressure, the pump will restart. When a jockey pump is used in the system and if the pressure drops below a certain level and for a given period of time it is unable to compensate for the drop, then the main pumps are switched on.

Advantages

  • Color graphic touch screen with intuitive interface;
  • Adaptive system for setting up system operation;
  • Availability of automatic transfer of reserve (ATS);
  • Monitoring the alarm line for open and short circuit;
  • Control power lines on a cliff;
  • Maintaining a log of failures and events.

Possible operating modes

  • Short-term mode - work in the “Fire extinguishing” mode.

Today on Russian market a huge selection of pressure boosting pumping units for water supply and fire extinguishing systems, heating, air conditioning, etc.

And often designers, installation specialists or purchasing departments are concerned about the correct selection of ready-made modular solutions. In this article we will look at the main criteria that should be followed when choosing a pumping unit, and since you first need to determine the system in which you plan to use pumping unit and take into account its specifics, here we will limit ourselves to the principles of selecting a pumping unit for water supply systems.

So, the selection of an installation is carried out in several stages:

  • selection of pump type;
  • determination of its operating characteristics and selection of the number of pumps in the installation;
  • choice of regulation type.

Pump types

For water supply, vertical ones specially designed for this application are better suited. multistage pumps, having high pressure and relatively low productivity. And for those cases when the flow rate in the system is quite large (from 25 m3/h and above), cantilever pumps are suitable, but not all manufacturers use them in their installations.

It is worth considering that vertical multistage pumps, which have a steep operating characteristic, at high capacities begin to lose in price (sometimes twice or more) to cantilever pumps, which have more simple design and, as a result, lower cost. However, at low productivity (when water intake in the system is minimal) and at relatively high pressure, cantilever pumps cannot compete in price with vertical pumps that have a smaller motor and are capable of operating over the entire range, providing the required parameters.

Let's look at an example of pumps that are used for the production of GRANFLOW ® pumping units ( own production ADL company).

Thus, Ebara 3M40 series cantilever pumps (Japan) can operate for a long time in a flow range of 12 m3/h. At lower flow rates, the pump can operate in short-term intermittent mode. Therefore, if the water flow in the system drops below 12 m3/h for a long time, then it is better to choose an installation based on vertical pumps, for example, the DPV32 series (Netherlands), for which work in the entire range from 2-3 m3/h to 40 m3 /h is normal operating mode.

For comparison, the following diagram shows the operating curves of the 3M40-160 4 kW and DPVF32-20 4 kW pumps:

From this diagram it follows that the pumps have electric motors of the same power and have approximately the same performance/pressure operating curves. However, the minimum productivity of a cantilever pump for continuous operation must be at least 12 m3/h.

Accordingly, if you expect that the water flow in the system will drop below 12 m3/h, then it is more advisable to choose an installation based on DPVF32-20 vertical pumps, which will operate in normal mode over the entire range, starting from 2-3 m3/h.

When choosing optimal solution We should not forget about the price. Thus, the price of a vertical pump DPVF32-20 will be 1.6 times more than 3M40-160. The more pumps there are in your installation, the more noticeable the difference.

This is all that concerns cold water and hot water supply in central water supply systems, but it is worth considering that modular solutions are also used at water intake points, for example, at second lift stations. To solve such problems, the only solution would be installations on console pumps, because Here we're talking about about very high performance.

For example, an installation based on 6 3LS80 cantilever pumps (up to 240 m3/h) will provide a flow rate of up to 1200 m3/h with five working pumps, while one pump will be in reserve.

Determination of pump performance characteristics and selection of the number of pumps in the installation

Let's say we need to ensure a productivity in the system of 30 m3/h at a pressure of 40 m.w.s.

This problem can be solved in several ways. Let's look at them and highlight them distinctive features and we will select the option that is most preferable for us.

Option 1. First, let's select an installation based on DPV vertical pumps. Let’s take the scheme 1 pump working / 1 backup. With such a scheme, each pump in the installation must provide an operating point - a capacity of 30 m3/h at 40 m.w.s. pressure A pump of the DPVF45-20 7.5 kW brand is suitable for us, which has a small margin (1-2 m.v.s.) relative to the required pressure of the operating point, as can be seen from the following diagram:

This reserve will be spent on losses in the inlet and outlet manifolds of the installation, as well as on opening check valve(on average, for all DPV-based installations these losses do not exceed 1-3 m.w.s.).

Then the following installation is suitable for us: GRANFLOW ® UNV 2 DPVF 45-20 7.5 kW RR/PD, where:

  • 2 - number of pumps
  • 7.5 - power of one pump
  • PP/PD - relay/frequency regulation

Option 2. Sometimes it is advisable to select the installation for more pumps rather than two. This means that for hydraulic system and for the power supply network it is better when two pumps of lower power are turned on, say 4 kW, rather than one larger (for example, 7.5 kW).

And also for installations with a frequency type of regulation, it is important to take into account that in its operation the frequency converter changes the rotation speed of the pump motor in order to maintain the balance of the pressure required by the system and the pressure developed by the pump. That is, the converter uses a direct relationship between pressure and supply frequency. When the power frequency drops to 35 Hz (programmable parameter), the frequency converter turns off the pump to avoid its operation in an unfavorable mode (at this frequency, the pump efficiency tends to 0, plus the hydraulics begin to cool poorly at low flow rates (this mainly applies to hot water supply systems )). Therefore, most often when frequency regulation it makes sense to select an installation on a larger number of pumps. However, you should not excessively increase the number of pumps in the installation - this can significantly increase its cost, while it will not bring any operational benefits.

Statistics confirm this: of the thousands of pumping units for water supply produced by the ADL Company from 2002 to 2009, about 80% are installations with three pumps (two working + one standby).

So, let’s select for the same 30 m3/h and 40 m.w.s. such an installation.

To do this, we divide the flow rate into two pumps (the flow rates of two parallel operating pumps are added up), and leave the pressure the same, since it does not change. Thus, we will select each of the working pumps according to the parameters - 15 m3/h and 40 m.w.s.

It is worth introducing a correction for flow rate in the form of 5-10%, and also give a headroom: 1-2 meters, if the installation is at vertical pumps, and 2-3 meters - if on console.

Then the following 2 installations will correspond to our request: GRANFLOW ® UNV 3 DPV 18-40 4.0 kW RR/PR and GRANFLOW ® UNV 3 3M32-200 4.0 kW RR/PR, where 3 is the number of pumps 4.0 is the power one PP/PD pump – relay/frequency control

Please note that the installed power of the pumping unit has become 12 kW, instead of 15 kW, as it was in option 1. In this case, it turns out that an installation with three pumps will cost less than a station with two pumps.

Returning to the selected 3-pump installations, it should be noted that, despite the same power of electric motors and the same number of pumps in their composition, as well as complete similarity in functionality, the installation price is console pumps will be significantly lower. Reason: the design of the cantilever pump is simpler, and as a result, the cantilever pump itself costs less to produce. The lower cost of the 3M pump relative to the DPV for the same operating point leads to significant savings when choosing the GRANFLOW ® UNV 3 3M32-200 4.0 kW RR/PD installation. But if it is necessary to provide greater pressure, a cantilever pump will cost more than a vertical multistage pump, which is precisely designed to create high pressures with its steps. A cantilever pump, which has a flatter characteristic, is capable of developing greater pressure only due to a significant increase in engine power. The result is a sharp increase in its price.

Using these considerations, you can choose a four-, five- or even six-pump installation. In this case, you should not artificially increase the number of pumps in the installation, but rather, you should focus on the specific operating flow/pressure curves of individual pumps. Also, an increase in the number of pumps is inevitable when we are talking about high flow rates, which only a few units can provide.

Types of regulation

As for the types of regulation, all types of regulation offered for pumping units can be reduced to two: frequency and relay.

Relay regulation. This is a control option in which the signal from the control relay (at water supply stations is mounted on the pressure manifold) when the pressure drops below the set value is sent to the controller (in the general case). The controller, in turn, starts the pumps themselves either by direct start or through soft starters. Despite its cheapness and simplicity, this control method has one very serious drawback - it is impossible to smoothly regulate the pressure in the system. Physically, this means that the pump will turn on when the pressure in the system drops (someone opened the tap), pump water into the system, thereby increasing the pressure in it and then, upon reaching upper value, at which the relay opens, turn off. Thus, the pump will be constantly turned on/off. This is not “useful” for the pump due to the fact that at the initial moment of starting the current exceeds the rated value by 3-5 times, which leads to heating of the electric motor windings. That is why each pump has a maximum number of starts per hour. If the recommended value of the permitted number of starts is exceeded, the motor windings may burn out, which will lead to the need to replace it or rewind it. In addition to problems with the pump motor, frequent switching on of pumps, especially high-power ones, negatively affects the power supply network.

Despite the above disadvantages, relay regulation is quite often used in water supply systems and is cheaper than frequency regulation. In addition, you can always install a hydraulic accumulator at the outlet, which will reduce the number of pump starts, provide an additional supply of water in the system, and smooth out pressure peaks when starting pumps.

Frequency regulation. This is the most common type of regulation for cold and hot water supply systems at the moment, based on sales statistics. The fact is that the frequency converter allows you to achieve significant energy savings (up to 60%!). By reducing the frequency of the pump motor current during the control process (for example, water consumption in the system has decreased), the frequency converter reduces energy consumption from the network. At the same time, optimal pressure in the system is maintained.

There are various frequency control schemes on the market. Among them are installations with built-in frequency converters (or with frequency converter per pump in the control cabinet) and installations with a single frequency converter in the cabinet are the most common.

It should be borne in mind that when, for example, you have a 2-pump installation with one duty pump and one standby pump, or even when there is more than one duty pump in the installation, the circuit with a single frequency converter in the cabinet copes well with the functions of maintaining pressure and , switching between pumps as part of the installation, ensures a uniform operating time of their service life. This saves you the cost of one or more built-in backup pump converters.

Here are the main points to consider when selecting pumping units for water supply systems.

(PDF, 404.5 Kb) PDF

The water supply system is a collection of various units and devices for providing water to a private home, apartment, or enterprise. One of the elements of such a system is a fluid pressure increase unit. Low water pressure in the pipe causes disruptions in the functioning of household or industrial equipment. These situations can happen not only in private homes, but also in premises that are connected to a centralized water supply. Expensive washing and washing machines, plumbing fixtures associated with liquid can break due to pressure changes. To avoid these troubles, it is necessary to install command pumps in the water supply.

Advantages of water pressure booster installation:

  • Automatic control;
  • Using water from different sources;
  • Full set;
  • Low noise level;

Intelligent control unit pumping system, presented on our website, allows you to automatically adjust to changes in input water pressure. This results in significant savings electrical energy. The pressure booster unit, due to its compact size, does not take up much space. Simple installation allows you to install these devices yourself, without the involvement of outside specialists.

The main advantages of using a pressure booster system:

  • Effective protection against problems;
  • Low power consumption;
  • Possibility of installation in the house;
  • Operation from water supply, well or storage tank;

A convenient display shows the necessary information during operation of the device. It will promptly warn the owner about changes in the operation of the device. Masters from St. Petersburg will carry out installation and commissioning work.


Modern public utilities often does not provide the supply of water of the required parameters to the common pipeline. A pump to increase water pressure would be useful in some cases. But the choice of device depends on many factors. Sometimes a comprehensive solution can save the situation.

Technical parameters of water supply laid down in the standards

Modern Appliances designed for water supply pressure of 4 bar. If there is less pressure in the tubes, the devices turn off. You can find out the pressure using a pressure gauge or using homemade device– a transparent tube 2 m long connected to a tap.


Equal physical quantities pressures are recognized: 1 bar, 1 at, 10 m water. Art., 100 kPa. Such indicators can be found in the pump data sheets.

The normal pressure for which pipes, connections, and gaskets are designed is 4 bar. At 6-7 bars, leaks appear in the line, at 10 the pipes can burst. You need to know this when choosing a pump to increase water pressure.

Is it always possible to install booster pumps?

In a private house, the lack of pressure in the main line is relieved by installed pumps. At the same time, their power supply through the battery tank allows for stable input parameters. Install devices in areas where it is necessary to increase the pressure after the pump. A pump for increasing water pressure differs from a centrifugal one in that it turns on periodically, upon request. The centrifugal apparatus in the system operates constantly.

IN apartment building There may be several problems:

  • there is no required pressure in the manifold on the distribution comb for any reason;
  • during periods of peak loads, water flows to the upper floors with interruptions in flow;
  • in an apartment in different points the pressure is different.

Examinations should show the cause of the lack of pressure. There are cases when the pressure in the line is normal, but the neighbor below has tightened it conditional pass when replacing pipes. It happens that the pipes are completely clogged with rust. In such cases, it is useless to install a pump to increase water pressure in an apartment with a common wiring. It is necessary to restore the conditional passage in the system.


A legal solution could be to install an accumulator tank in the basement, common to the riser, then all residents can use a pump that increases the pressure in the water supply on the common line.

If there is a general lack of water in the system, it is prohibited to install an additional pump to increase the pressure; penalties are comparable to the cost of the equipment.

Pump selection criteria

First of all, a pump is selected based on the outlet pressure, about 4 bar. It is important to know the dimensions, wet or dry rotor, noise level. When choosing a pump high pressure The determining factor may be the presence of automation or manual control.

For hot and cold water supply use different systems pumps Systems cold water equipped with pumps from well-known manufacturers:

  1. WILO - the booster pump is recognized as the most popular. They are distinguished by their simple design, reliability and long warranty period.
  2. – works silently, in demand, warranty is issued for 1 year
  3. OASIS is a brand that strives to get to the TOP, and so far it has succeeded due to simple device, reliability and low price.
  4. Gilex is a recognized domestic leader in the production of pumps.

Their models are compact and low noise. The pipes for installation are standardized for Russian water utility systems.

Pumps for increasing water pressure come in two types, with a “wet” and a “dry” rotor. Devices with wet rotor installed in the pipe. The power part is located outside the pipe, is air-cooled, and is attached to the wall in a cantilever manner - a pump with a dry rotor.

High pressure water pumps on the manifolds operate continuously. More often they are equipped with not one, but several wheels; the pressure increases in steps. Such devices can create a pressure of several tens of atmospheres on the discharge line. Industrial high pressure units are only available with a separate air-cooled motor.

Installation of a pump in an apartment

First, you should distribute water to devices that require stable pressure. Installing a pump before wiring will allow you to get by with one device, which is turned on manually or automatically.

Before starting work, make sure that the reinforcement does not allow the agent to pass through. To guarantee, the common cold water riser must be shut off from the collector.

Steel pipes must be welded by a professional welder. Polypropylene water conduits are connected with special fittings; a soldering iron is required. Shut-off valves must be installed before and after the pump.

It is important to correctly install the high-pressure water pump impeller in the direction of fluid flow, as indicated on the arrow. A general booster pump can be installed immediately after the main valve, then pressure is maintained at all sampling points. After checking the system for tight connections, plug the pump into the outlet.

Using the accumulator tank and high pressure pump

Such a scheme will be required if multi-storey building There is a chronic lack of pressure on the upper floors. The activation of the high pressure pump is caused by an increase in the flow rate in the line to a certain value. Since pressure and flow rates are interdependent, an increase in flow rate is a signal to turn on the high-pressure pump.

When turned on, the pump will create the necessary pressure in the system on all floors. Thus, it is possible to solve the problem of water supply for residents in a cottage or multi-story building.

Cost of booster pumps

The market offers models of pumps for increasing water pressure at a price corresponding to the prestige of the brand, degree of automation, and parameters. The minimum cost for a pump is 2,500 rubles. Brands that work on the “set it and forget it” principle can cost as much as 30,000 rubles.

Industrial installations for highways are purchased by agreement. In any case, installing a high-pressure pump will require a pipe inspection and an installation project approved by the housing office.

Video about the operation of a booster pump in a water supply system


The Anmex company manufactures at its production site and supplies high-tech pressure boosters of the NAPOR series throughout Russia. for various purposes and design, made on the basis of modern components of Russian and foreign production.

In our pressure boosting stations we combine both European components, for example, pumps from international concerns that have proven themselves in Russian realities: LEO, KSB, Grundfos, Wilo, Lowara, DAB, Flygt, and our own developments: a modern logic controller of the SLK-1 series, graphic operator panels for serial products, power supplies, phase control relays, control cabinets of the “CLASS” series for control and protection of pumping units and others interesting solutions, allowing to provide high quality, reliability and maintainability of manufactured units.

Pumping stations are widely used in construction sites, V residential buildings, in various food and chemical industry, private houses and cottages, heating, circulation, irrigation and reclamation systems. In a word, where it is necessary to ensure the required flow and pressure, pressure boosting stations “NAPOR” are used.

In addition, urban areas for development are constantly decreasing, which forces construction companies increase the number of storeys in buildings, and the city water supply cannot provide the proper pressure in the cold water and hot water systems at such a building height. Monoblock stations that are completely ready for connection to networks help solve the problem.

Structurally, NAPOR pressure booster installations are divided into the following subgroups according to the type of pumps used:

  1. Horizontal multistage pumps type CM, MHI
  2. Vertical multistage pumps type CR, MVI, Helyx, Movitec
  3. Horizontal single stage pumps type NB, BL, Etabloc
  4. Vertical single-stage pumps type TP, IL, IPL, Etaline, Etaline-R

All of the above allows us to say with confidence that by using equipment from our production, you, as a customer, receive technically competent solutions (optimal in price, quality and delivery time) that will help you take water supply to a qualitatively new level when implementing your projects.

We provide a 2-year warranty on the supplied products, and also provide design, supervision, installation and commissioning services, and provide after-sales service and post-warranty service. We offer a range of turnkey services.

To calculate the pressure booster station Russian production please contact our engineers by phone, or e-mail. You can also download the questionnaire or fill out the interactive form directly on our website. We are in as soon as possible We will provide all the necessary information and answer all your questions.

Thank you for your interest in the company and equipment produced by Anmex LLC. We hope the information on the site was useful and you found what you were looking for.

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