For more than 5 years, ADL has been the exclusive distributor of the products of the well-known European manufacturer - the Flamco concern (the Netherlands). In previous issues of the "ABOK" magazine ("ABOK", No. 2, 2005), we have already talked about the advantages, selection and operation of expansion tanks, safety valves, separators and air vents manufactured by Flamco. This equipment has been installed and successfully operated at tens of thousands of facilities throughout Russia, among which it is worth noting the following: the Tretyakov Gallery, the Old Square Building Complex, the Bolshoi Theater, the Accounts Chamber, the Foreign Ministry building, MAMT (Stanislavsky Theater), housing complexes of the DON-Stroy company. In this article, we will dwell on the Flamcomat automatic pressure maintenance systems.
It's no secret that for the big circulation systems the disadvantage of membrane expansion tanks is their size. The fact is that, on average, the tank is filled with a coolant by only 30-60%, and the lower values are just for the tanks of large volumes. In practice, this means the following: at facilities where the calculated volumes of tanks are several thousand liters, there is a serious problem with their placement in the operating room, therefore, automatic Flamcomat pressure maintenance units are most often used for such facilities. And if there is still a question about effective removal gases from the system, then in such cases it is no longer possible to do without installations.
The pressure maintenance unit is basically a combination of a gravity expansion vessel and a pump-based pressure control unit. When the temperature of the system increases, the solenoid valve opens, which bypasses the excess coolant from the system to the tank, and when the temperature drops, the coolant from the tank is pumped back into the system by pumps. Thus, the units can maintain the pressure in the system within sufficiently narrow, predetermined limits. In addition, a non-pressurized tank can be almost completely filled with a coolant, which makes pressure maintenance units several times more compact than conventional expansion tanks.
The units can be equipped with a main expansion tank with a volume of 150 to 10,000 liters, while maintaining the operating pressure in the system up to 145 m ... The maximum operating temperature acting on the membrane is no more than 70 ° C.
In the Flamcomat, 3 main functions are combined: maintaining the pressure in a narrow range (control hysteresis +/- 0.1 bar), deaeration of the heating medium, make-up.
Flamcomat pressure maintenance units successfully “fight” the problem of coolant airing, which is well known to any specialist. Flamcomat pressure maintenance systems are based on the principle of microbubble deaeration (throttling): when the heating medium enters the expansion tank installation (without pressure), the ability of gases to dissolve in water is reduced, and excess air is removed. In order to remove as much air as possible from the coolant, and therefore from the system, an increased number of cycles, as well as an increased cycle time, are pre-entered into the installation program at the factory. After 2440 hours, this turbo deaeration mode changes to normal deaeration mode. A special compartment with PALL-rings (international patent No. 0391484) is installed at the entrance to the expansion tank, which very effectively remove air from the coolant. As a result, the deaeration capacity of the Flamcomat pressure maintenance system is increased by 2-3 times compared to conventional systems, this is especially important at the time of the first start-up of the system. Do not forget about the economic side of the issue, the effective deaeration capacity of the installation allows you to abandon the use of expensive deaeration air separators or time-consuming manual deaeration.
Flamcomat comes standard with an automatic make-up that compensates for losses due to leaks and deaeration. The level control system automatically activates the make-up function when required, and the volume of the coolant flows into the tank in accordance with the program. When the minimum tank level is reached (usually 6%), the solenoid valve on the make-up line opens and the tank is filled to the required level (usually 12%) to prevent the pump from running dry. The pressure maintenance unit also includes a flow meter installed in the make-up line to determine the amount of leaks in the system.
In the recent past, the following question was relevant: which pressure maintenance systems can be used for high-rise buildings up to 240 m ?! Flamco has released the lineup installations Flexcon MPR-S (Russia Special / Especially for Russia), which took into account the wishes of Russian urban planners, in particular the well-known company DON-Stroy LLC. At present, the aforementioned pressure maintenance units are successfully operated in high-rise buildings, for example, the tallest building in Russia and in Europe - TRIUMPH-PALACE, Chapaevsky per. ow. 3, building height = 264 m, m. Sokol.
The MPR-S units are equipped with an expansion tank with a volume of 200 to 5000 liters, while maintaining a head up to 240 m.
All models of installations can include both 1 and 2 pumps. In installations with 2 pumps in the installation program, you can optionally select the mode of their operation: main / standby, alternate operation of pumps, parallel operation of pumps.
In conclusion, it should be noted that Flamco today is a leading manufacturer of such equipment that meets all the most modern requirements of engineering systems, namely: impeccable quality, efficiency, ease of use and ease of maintenance.
More detailed information about automatic installations and other Flamco equipment can be obtained from the engineers of the pipe fittings department of the general industrial application of the ADL Company. We would also like to draw your attention to the specialized catalog “Automatic pressure maintenance systems”, in which you will find all the necessary technical information on this product.
(PDF, 301.32 Kb) PDF
A. Bondarenko
Application automatic installations pressure maintenance (AUPD) for heating and cooling systems received wide use due to the active growth in the volume of high-rise construction.
AUPD perform the functions of maintaining constant pressure, compensating for temperature expansions, deaerating the system and compensating for coolant losses.
But since this is new enough for Russian market equipment, many specialists in this field have questions: what are the standard automatic control systems, what are the principles of their operation and the selection method?
Let's start by describing the default settings. Today, the most common type of automatic control system is installations with a pump-based control unit. Such a system consists of a free-flow expansion tank and a control unit, which are interconnected. The main elements of the control unit are pumps, solenoid valves, pressure sensor and flow meter, and the controller, in turn, provides control of the automatic control unit as a whole.
The principle of operation of these automatic control systems is as follows: when heated, the coolant in the system expands, which leads to an increase in pressure. The pressure sensor detects this increase and sends a calibrated signal to the control unit. The control unit (using a weight (filling) sensor constantly fixing the liquid level in the tank) opens the solenoid valve on the bypass line. And through it, the excess coolant flows from the system to the membrane expansion tank, the pressure in which is equal to atmospheric.
Upon reaching the set pressure in the system, the solenoid valve closes and blocks the flow of fluid from the system to the expansion vessel. When the coolant in the system cools, its volume decreases and the pressure drops. If the pressure drops below the set level, the control unit turns on the pump. The pump runs until the pressure in the system rises to the set value. Constant monitoring of the water level in the tank protects the pump from "dry" running, and also prevents the tank from overfilling. If the pressure in the system goes beyond the maximum or minimum, one of the pumps or solenoid valves is activated, respectively. If the capacity of one pump in the pressure line is not enough, the second pump is activated. It is important that the automatic control system of this type has a safety system: if one of the pumps or solenoids fails, the second should automatically turn on.
It makes sense to consider the method of selecting AUPD based on pumps using an example from practice. One of the recently implemented projects - "Residential house on Mosfilmovskaya" (object of the company "DON-Stroy"), in the central heat point which used a similar pumping unit. The height of the building is 208 m. Its central heating station consists of three functional parts, which are responsible, respectively, for heating, ventilation and hot water supply. The heating system of the high-rise building is divided into three zones. The total estimated thermal power of the heating system is 4.25 Gcal / h.
We present an example of the selection of AUPD for the 3rd heating zone.
Initial data required for the calculation:
1) thermal power of the system (zones) N system, kW. In our case (for the 3rd heating zone) this parameter is equal to 1740 kW (initial data of the project);
2) static height N st (m) or static pressure R st (bar) is the height of the liquid column between the connection point of the unit and the highest point of the system (1 m liquid column = 0.1 bar). In our case, this parameter is 208 m;
3) the volume of the coolant (water) in the system V, l. For the correct selection of AUPD, it is necessary to have data on the volume of the system. If the exact value is unknown, the average value of the water volume can be calculated using the factors given in the table... According to the project, the water volume of the 3rd heating zone V system is equal to 24 350 liters.
4) temperature graph: 90/70 ° C.
First stage. Calculation of the volume of the expansion tank to the AUPD:
1. Calculation of the expansion coefficient TO expansion (%), expressing the increase in the volume of the coolant when it is heated from initial to average temperature, where T Wed = (90 + 70) / 2 = 80 ° C. At this temperature, the expansion coefficient will be 2.89%.
2. Calculation of the volume of expansion V rassh (l), i.e. the volume of the coolant displaced from the system when it is heated to an average temperature:
V ext = V sist. K ext / 100 = 24350. 2.89 / 100 = 704 l.
3. Calculation of the estimated volume of the expansion tank V b:
V b = V ext. TO zap = 704. 1.3 = 915 liters.
where TO zap - safety factor.
Next, we select the standard size of the expansion tank from the condition that its volume should not be less than the calculated one. If necessary (for example, when there are size restrictions), the AUPD can be supplemented with an additional tank, dividing the total estimated volume in half.
In our case, the volume of the tank will be 1000 liters.
Second phase... Selection of the control unit:
1. Determination of the nominal working pressure:
R sist = N sist / 10 + 0.5 = 208/10 + 0.5 = 21.3 bar.
2. Depending on the values R sist and N system, we select the control unit according to special tables or diagrams provided by suppliers or manufacturers. All models of control units can include either one pump or two. In AUPD with two pumps in the installation program, you can optionally select the pump operation mode: "Main / standby", "Alternate operation of pumps", "Parallel operation of pumps".
This completes the calculation of the AUPD, and the volume of the tank and the marking of the control unit are prescribed in the project.
In our case, the automatic control unit for the 3rd heating zone should include a free-flow tank with a volume of 1000 l and a control unit that will maintain the pressure in the system at least 21.3 bar.
For example, for this project, AUPD MPR-S / 2.7 was chosen for two pumps, PN 25 bar and an MP-G 1000 tank from Flamco (Netherlands).
In conclusion, it is worth mentioning that there are also compressor-based installations. But that's a completely different story ...
Article provided by ADL Company
Flamcomat automatic pressure maintenance (pump controlled)
Application area
AUPD Flamcomat is used to maintain constant pressure, compensate for thermal expansion, deaeration and compensate for coolant losses in closed systems heating or cooling.
* If the temperature of the system at the point of connection of the installation exceeds 70 ° C, it is necessary to use an intermediate tank Flexcon VSV, which provides cooling of the working fluid before installation (see chapter "Intermediate tank VSV").
Purpose of the Flamcomat installation
Maintaining pressure
AUPD Flamcomat maintains the required pressure in
system in a narrow range (± 0.1 bar) in all operating modes, and also compensates for thermal expansion
coolant in heating or cooling systems.
Flamcomat automatic control system as standard
consists of the following parts:
... membrane expansion tank;
... Control block;
... connection to the tank.
Water and air environment in the tank are separated by a replaceable diaphragm made of high quality butyl rubber, which is characterized by very low gas permeability.
Operating principle
When heated, the coolant in the system expands, which leads to an increase in pressure. The pressure sensor detects this increase and sends a calibrated signal to
Control block. The control unit, which, using a weight sensor (filling, Fig. 1), constantly records the values of the liquid level in the tank, opens the solenoid valve on the bypass line, through which excess coolant flows from the system into the diaphragm expansion tank (whose pressure is equal to atmospheric).
Upon reaching the set pressure in the system, the solenoid valve closes and blocks the flow of fluid from the system to the expansion vessel.
When the coolant in the system cools, its volume decreases and the pressure drops. If the pressure drops below the set level, the control unit turns on
pump. The pump runs until the pressure in the system rises to the set level.
Constant monitoring of the water level in the tank protects the pump from "dry" running, and also prevents the tank from overfilling.
If the pressure in the system goes beyond the maximum or minimum, then, accordingly, one of the pumps or one of the solenoid valves is activated.
If there is not enough capacity of 1 pump in the pressure line, then the 2nd pump will be activated (control unit D10, D20, D60 (D30), D80, D100, D130). AUPD Flamcomat with two pumps has a safety system: if one of the pumps or solenoids fails, the second is automatically turned on.
In order to equalize the operating time of pumps and solenoids during the operation of the unit and increase the service life of the unit as a whole, two-pump units are used
system of switching "working-standby" between pumps and solenoid valves (daily).
Error messages regarding pressure value, tank fill level, pump operation and solenoid valve are displayed on the control panel of the SDS module.
Deaeration
Deaeration in the Flamcomat automatic control system is based on the principle of pressure reduction (throttling, fig. 2). When the heat carrier under pressure enters the expansion tank of the installation (free-flow or atmospheric), the ability of the gases to dissolve in water decreases. Air is released from the water and is discharged through an air vent installed in the upper part of the tank (Fig. 3). To remove as much air as possible from the water, a special compartment with
with PALL rings: this increases the deaeration capacity by 2-3 times compared to conventional installations.
In order to remove as much excess gases from the system as possible, the increased number of cycles as well as the increased cycle times (both values depend on the size of the tank) are pre-programmed in the factory. After 24-40 hours this turbo deaeration mode switches to normal deaeration mode.
If necessary, you can start or stop the turbo deaeration mode manually (if SDS-module 32 is installed).
Make-up
Automatic top-up compensates for volume losses of the heating medium due to leaks and deaeration.
The level control system automatically activates the make-up function when required, and the coolant enters the tank in accordance with the program (Fig. 4).
When the minimum coolant level in the tank is reached (usually = 6%), the solenoid on the make-up line opens.
The volume of the coolant in the tank will be increased to the required level (usually = 12%). This will prevent the pump from running dry.
When using a standard flow meter, the amount of water can be limited by the make-up time in the program. When this time is exceeded, action must be taken to correct the problem. Thereafter, if the make-up time has not changed, the same volume of water can be added to the system.
In installations where impulse flow meters (option) are used, make-up will be switched off when the program is reached.
world volume of water. If the make-up line
AUPD Flamcomat will be connected directly to the drinking water supply system, it is necessary to install a filter and backflow protection (hydraulic cut-off - optional).
Basic elements of AUPD Flamcomat
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AUPD Flamcomat М0 GB 300
The development of large cities inevitably leads to the need for the construction of high-rise multifunctional office and retail complexes. Such high-rise buildings place special demands on hot water heating systems.
Many years of experience in the design and operation of multifunctional buildings allows us to formulate the following conclusion: the basis for the reliability and efficiency of the whole operation of the heating system is the observance of the following technical requirements:
Failure to meet at least one of these requirements leads to increased wear and tear of heating equipment (radiators, valves, thermostats, etc.) In addition, the consumption of thermal energy increases, and, accordingly, the material costs increase.
To ensure that these requirements are met, the pressure maintenance, automatic make-up and gas removal systems from Anton Eder GmbH allow.
Rice. 1. Diagram of the pressure maintenance plant produced by Eder
Equipment "Eder" (EDER) consists of separate modules providing pressure maintenance, replenishment and degassing of the coolant. Module A for maintaining the coolant pressure consists of an expansion tank 1, in which there is an elastic chamber 2, which prevents the coolant from contacting with air and directly with the tank walls, which favorably distinguishes Eder expansion units from membrane-type expanders, in which the tank walls are subject to corrosion from for contact with water. When the pressure in the system increases, caused by the expansion of water during heating, valve 3 opens, and the excess water from the system enters the expansion tank. When cooling and, accordingly, a decrease in the volume of water in the system, the pressure sensor 4 is triggered, turning on the pump 5, pumping the coolant from the tank into the system until the pressure in the system becomes equal to the set one.
Make-up module B makes it possible to compensate for the heat carrier losses in the system resulting from of various kinds leaks. When the water level in tank 1 decreases and the set minimum value valve 6 opens and water from the cold water supply system enters the expansion tank. When the user-set level is reached, the valve is turned off and the make-up stops.
When operating heating systems in high-rise buildings, the most acute issue is the degassing of the coolant. Existing air vents make it possible to get rid of the "airiness" of the system, but do not solve the problem of purifying water from gases dissolved in it, primarily atomic oxygen and hydrogen, which cause not only corrosion, but also high speeds and the pressures of the coolant cavitation, which destroys the devices of the system: pumps, valves and fittings. When using modern aluminum radiators, hydrogen is formed due to a chemical reaction in water, the accumulation of which can lead to rupture of the radiator case, with all the ensuing "consequences".
The Eder C degassing module uses physical way continuous removal of dissolved gases due to a sharp decrease in pressure. When valve 9 is briefly opened in a predetermined volume (approx. 200 l) 8 within fractions of a second, the water pressure in excess of 5 bar drops to atmospheric. In this case, there is a sharp release of gases dissolved in the water (the effect of opening a bottle of champagne). A mixture of water and gas bubbles is fed into the expansion tank 1. The degassing tank 8 is replenished from the expansion tank 1 with water already purified from gas. Gradually, the entire volume of the coolant in the system will be completely cleaned of impurities and gases. The higher the static height of the heating system, the higher the requirements for degassing and constant pressure of the heating medium. All these modules are controlled by the microprocessor unit D, which has diagnostic functions and the ability to be included in the automated systems dispatching.
The use of Eder plants is not limited to high-rise buildings. It is advisable to use them in structures with a branched heating system. Compact EAC units, in which an expansion vessel with a volume of up to 500 liters is articulated with a control cabinet, can be successfully used as a supplement to autonomous systems heating in individual construction.
The company's installations, which are successfully used in all high-rise buildings in Germany, are a choice in favor of a modern engineering system heating.
SPL® pressure boosting units are designed for pumping and increasing the pressure of water in the systems of potable and industrial water supply of various buildings and structures, as well as in fire extinguishing systems.
This is a modular high-tech equipment consisting of a pump unit, including all the necessary piping, as well as modern system management, guaranteeing energy-efficient and reliable operation, with all the necessary permits.
Application of components from leading world manufacturers, taking into account Russian standards, norms and requirements.
SPL® WRP: Symbol Structure
SPL® WRP: composition of a pumping unit
The frequency control system for all pumps is designed to monitor and control standard asynchronous electric motors of pumps of the same size in accordance with external control signals. This control system provides the ability to control from one to six pumps.
The principle of operation of frequency control for all pumps:
1. the controller starts up the frequency converter, changing the pump motor speed in accordance with the readings of the pressure sensor based on the PID control;
2. at the beginning of work, one variable frequency pump is always started;
3. The capacity of the booster installation varies depending on consumption by turning on / off the required number of pumps and parallel regulation of the pumps in operation.
4. if the set pressure is not reached, and one pump is operating at maximum frequency, then after a certain period of time the controller will turn on the additional frequency converter, and the pumps are synchronized according to the speed (pumps in operation operate at the same speed).
And so on until the pressure in the system reaches the set value.
When the set pressure value is reached, the controller will start decreasing the frequency of all running frequency converters. If for a certain time the frequency of the converters is kept below a predetermined threshold, the additional pumps will be switched off alternately at certain intervals.
To equalize the resource of the pump electric motors over time, the function of changing the sequence of turning on and off the pumps is implemented. It is also provided for automatic activation of standby pumps in case of failure of workers. The choice of the number of working and standby pumps is made on the controller panel. Frequency converters, in addition to regulation, provide smooth start-up of all electric motors, since they are connected directly to them, which avoids the use of additional devices smooth start, limit the starting currents of electric motors and increase the service life of pumps by reducing dynamic overloads executive mechanisms when starting and stopping electric motors.
For water supply systems, this means no water hammer when starting and stopping additional pumps.
For each electric motor, the frequency converter allows you to implement:
1. speed control;
2. overload protection, braking;
3. monitoring of mechanical load.
Mechanical stress monitoring.
This set of features allows you to avoid the use of additional equipment.
In the base of a pumping unit of the SPL® WRP-BL configuration, there can be only two pumps, and control is realized only according to the principle of the working-standby pump operation scheme, while the working pump is always involved in operation with a frequency converter.
Frequency regulation is the most effective method regulation of pump performance. The cascade pump control principle implemented in this case with the use of frequency regulation has already firmly established itself as a standard in water supply systems, since it gives serious energy savings and an increase in the functionality of the system.
The principle of frequency regulation per pump is based on the control of the controller of the frequency converter, changing the speed of one of the pumps, constantly comparing the value of the reference with the reading of the pressure sensor. In the event of a lack of capacity of the operating pump, an additional pump will turn on at the signal from the controller, and if an alarm occurs, the reserve pump will be activated.
The signal from the pressure sensor is compared with the set pressure B of the controller. The mismatch between these signals sets the speed of the pump impeller. At the start of operation, the main pump is selected based on the estimated minimum operating time.
The main pump is the pump that is currently being driven by the frequency converter. Auxiliary and standby pumps are connected directly to the mains supply or via a soft starter. In this control system, the selection of the number of working / standby pumps is provided from the controller's touchscreen display. The frequency converter connects to the main pump and starts running.
The variable frequency pump always starts first. Upon reaching a certain speed of the pump impeller, associated with an increase in the water flow in the system, the next pump is switched on. And so on until the pressure in the system reaches the set value.
To align the resource of electric motors in time, the function of changing the sequence of connecting electric motors to the frequency converter has been implemented. It is possible to customize the switching time.
The frequency converter provides regulation and soft start only of the electric motor that is connected directly to it, the rest of the electric motors are started directly from the mains.
When using electric motors with a power of 15 kW or more, it is recommended to run additional electric motors through soft starters to reduce starting currents, limit water hammer and increase the total pump resource.
The pumps operate on a signal from a pressure switch set to a certain value. The pumps are switched on directly from the mains and operate at full capacity.
The use of relay regulation in the control of pumping units provides:
1. maintaining the specified parameters of the system;
2. cascade method of control of a group of pumps;
3. mutual redundancy of electric motors;
4. alignment of the motor resource of electric motors.
In pumping installations designed for two or more pumps, if there is a lack of capacity of the operating pumps, an additional pump is switched on, which will also be activated in the event of an accident of one of the operating pumps.
The pump is stopped with a preset time delay by a signal from the pressure switch on reaching the preset pressure value.
If during the next set time the relay does not register a pressure drop, then the next pump stops and then in a cascade until all pumps stop.
The control cabinet of the pumping unit receives signals from the dry-running protection relay, which is installed on the suction pipeline, or from the float from the storage tank.
On their signal, in the absence of water, the control system will turn off the pumps, protecting them from destruction due to dry running.
Provides for automatic activation of standby pumps in the event of failure of workers and the ability to select the number of operating and standby pumps.
In pumping units based on 3 pumps or more, it becomes possible to control it from an analog sensor 4-20 MA.
When operating pressure boosting systems with a relay principle of maintaining pressure:
1. the pumps are switched on directly, which leads to water hammer;
2. energy savings are minimal;
3. regulation is discrete.
This is almost invisible when using small pumps up to 4 kW. As the power of the pumps increases, pressure surges when switching on and off become more and more noticeable.
To reduce pressure surges, it is possible to organize the inclusion of pumps with sequential opening of the damper or install an expansion tank.
Installing soft starters allows you to completely remove the problem.
The starting current with direct connection is 6-7 times higher than the nominal, while the soft start is gentle for the electric motor and mechanism. At the same time, the starting current is 2-3 times higher than the nominal, which can significantly reduce pump wear, avoid water hammer, and also reduce the load on the network during start-up.
Direct start is the main factor leading to premature aging of the insulation and overheating of the motor windings and, as a consequence, a decrease in its resource several times. The actual service life of an electric motor largely depends not on the operating time, but on the total number of starts.
| Name of product | Brand, model | Specifications | Quantity | Cost without VAT, rub. | Price with VAT, rub. | Wholesale cost from 10 pcs. in rubles without VAT | Wholesale cost from 10 pcs. in rubles VAT included |
|---|---|---|---|---|---|---|---|
| SHKTO-ON 1.1 | HxWxD 1000 * 800 * 300, Modicon TM221 controller unit 40 inputs / outputs, 24VDC power supply, built-in Ethernet port, Magelis STU 665 operator panel, Quint switching power supply unit - PS / IAC / 24DC / 10 /, unit uninterruptible power supply Quint - UPS / 24 / 24DC / 10, NSG-1820MC modem, analog module TMZ D18, galvanic isolators, circuit breakers and relays for a power of 1.1 kW | 1 | 722 343,59 | 866 812,31 | 686 226,41 | 823 471,69 | |
| Control and telecommunication equipment cabinet MEGATRON | SHKTO-ON 1.5 | HxWxD 1000 * 800 * 300, Modicon TM221 controller unit 40 inputs / outputs, 24VDC power supply, built-in Ethernet port, Magelis STU 665 operator panel, Quint switching power supply unit - PS / IAC / 24DC / 10 /, Quint uninterruptible power supply unit - UPS / 24 / 24DC / 10, NSG-1820MC modem, analog module TMZ D18, galvanic isolators, circuit breakers and relays for a power of 1.5 kW | 1 | 722 343,59 | 866 812,31 | 686 226,41 | 823 471,69 |
| Control and telecommunication equipment cabinet MEGATRON | SHKTO-ON 2,2 | HxWxD 1000 * 800 * 300, Modicon TM221 controller unit 40 inputs / outputs, 24VDC power supply, built-in Ethernet port, Magelis STU 665 operator panel, Quint switching power supply unit - PS / IAC / 24DC / 10 /, Quint uninterruptible power supply unit - UPS / 24 / 24DC / 10, NSG-1820MC modem, analog module TMZ D18, galvanic isolators, circuit breakers and relays for a power of 2.2 kW | 1 | 735 822,92 | 882 987,51 | 699 031,77 | 838 838,12 |
| Control and telecommunication equipment cabinet MEGATRON. | SHKTO-ON 3.0 | HxWxD 1000 * 800 * 300, Modicon TM221 controller unit 40 inputs / outputs, 24VDC power supply, built-in Ethernet port, Magelis STU 665 operator panel, Quint switching power supply unit - PS / IAC / 24DC / 10 /, Quint uninterruptible power supply unit - UPS / 24 / 24DC / 10, NSG-1820MC modem, analog module TMZ D18, galvanic isolators, circuit breakers and relays for a power of 3.0 kW | 1 | 747 738,30 | 897 285,96 | 710 351,38 | 852 421,66 |
| Control and telecommunication equipment cabinet MEGATRON | SHKTO-ON 4.0 | HxWxD 1000 * 800 * 300, Modicon TM221 controller unit 40 inputs / outputs, 24VDC power supply, built-in Ethernet port, Magelis STU 665 operator panel, Quint switching power supply unit - PS / IAC / 24DC / 10 /, Quint uninterruptible power supply unit - UPS / 24 / 24DC / 10, NSG-1820MC modem, analog module TMZ D18, galvanic isolators, circuit breakers and relays for a power of 4.0 kW | 1 | 758 806,72 | 910 568,06 | 720 866,38 | 865 039,66 |
| Control and telecommunication equipment cabinet MEGATRON | SHKTO-ON 7.5 | HxWxD 1000 * 800 * 300, Modicon TM221 controller unit 40 inputs / outputs, 24VDC power supply, built-in Ethernet port, Magelis STU 665 operator panel, Quint switching power supply unit - PS / IAC / 24DC / 10 /, Quint uninterruptible power supply unit - UPS / 24 / 24DC / 10, NSG-1820MC modem, analog module TMZ D18, galvanic isolators, circuit breakers and relays for 7.5 kW power | 1 | 773 840,78 | 928 608,94 | 735 148,74 | 882 178,48 |
| Control and telecommunication equipment cabinet MEGATRON | SHKTO-ON 15 | HxWxD 1000 * 800 * 300, Modicon TM221 controller unit 40 inputs / outputs, 24VDC power supply, built-in Ethernet port, Magelis STU 665 operator panel, Quint switching power supply unit - PS / IAC / 24DC / 10 /, Quint uninterruptible power supply unit - UPS / 24 / 24DC / 10, NSG-1820MC modem, analog module TMZ D18, galvanic isolators, circuit breakers and relays for 15 kW power | 1 | 812 550,47 | 975 060,57 | 771 922,94 | 926 307,53 |
| Control and telecommunication equipment cabinet MEGATRON | Shpch | HxWxD 500x400x210 with mounting plate, frequency converter ACS310-03X 34A1-4, circuit breaker | 1 | 40 267,10 | 48 320,52 | 38 294,01 | 45 952,81 |
| № | Name of product | Brand, model | Specifications | Retail price in rub. without VAT | Wholesale price from 10 pcs. in rubles without VAT | Wholesale price from 10 pcs. in rubles VAT included |
|---|---|---|---|---|---|---|
| 1 | SPL WRP-S 2 CR10-3 X-F-A-E | 714 895,78 | 681 295,67 | 817 554,81 | ||
| Nominal feed 10 cubic meters per hour, nominal head 23.1 m, power 1.1 kW. The station is equipped with an automatic pressure support system with the ability to remotely monitor and control the operation of pumps, pressure sensors, a dry-running sensor, inlet and outlet manifolds, check valves, shut-off gates. | ||||||
| 2 | Booster station based on grundfos pumps | SPL WRP-S 2 CR15-3 X-F-A-E | 968 546,77 | 923 025,07 | 1 107 630,08 | |
| Nominal flow 17 m3 / h, nominal head 33.2 m, power 3 kW. The station is equipped with an automatic pressure support system with the ability to remotely monitor and control the operation of pumps, pressure sensors, a dry-running sensor, inlet and outlet manifolds, check valves, shut-off gates. | ||||||
| 3 | Booster station based on grundfos pumps | SPL WRP-S 2 CR20-3 X-F-A-E | 1 049 115,42 | 999 806,99 | 1 199 768,39 | |
| nominal feed 21 cubic meters, nominal head 34.6 m, power 4 kW. The station is equipped with an automatic pressure support system with the ability to remotely monitor and control the operation of pumps, pressure sensors, a dry-running sensor, inlet and outlet manifolds, check valves, shut-off gates. | ||||||
| 4 | Booster station based on grundfos pumps | SPL WRP-S 2 CR5-9 X-F-A-E | 683 021,93 | 650 919,89 | 781 103,87 | |
| rated flow 5.8 cubic meters, rated head 42.2 m, power 1.5 kW, the station is equipped with an automatic pressure support system with the ability to remotely monitor and control the operation of pumps, pressure sensors, a dry-running sensor, inlet and outlet manifolds, check valves, shut-off valves. | ||||||
| 5 | Booster station based on grundfos pumps | SPL WRP-S 2 CR45-4-2 X-F-A-E | 2 149 253,63 | 2 048 238,70 | 2 457 886,45 | |
| nominal flow 45 m3 / h, nominal head 72.1 m power 15 kW station is equipped with an automatic pressure support system with the ability to remotely monitor and control the operation of pumps, pressure sensors, dry running sensor, inlet and outlet manifolds, check valves, shut-off valves shutters. | ||||||
| 6 | Booster station based on grundfos pumps | SPL WRP-S 2 CR45-1-1 X-F-A-E | 1 424 391,82 | 1 357 445,40 | 1 628 934,48 | |
| nominal flow 45 m3 / h, nominal head 15m, power 3 kW, the station is equipped with an automatic pressure support system with the ability to remotely monitor and control the operation of pumps, pressure sensors, dry running sensor, inlet and outlet manifolds, check valves, shut-off valves. | ||||||
| 7 | Booster station based on grundfos pumps | SPL WRP-S 2 CR5-13 X-F-A-E | 863 574,18 | 822 986,19 | 987 583,43 | |
| rated feed 5.8 cubic meters, rated head 66.1 m, power 2.2 kW. The station is equipped with an automatic pressure support system with the ability to remotely monitor and control the operation of pumps, pressure sensors, a dry-running sensor, inlet and outlet manifolds, check valves, shut-off gates. | ||||||
| 8 | Booster station based on grundfos pumps | SPL WRP-S 2 CR64-3-2 X-F-A-E | 2 125 589,28 | 2 025 686,58 | 2 430 823,90 | |
| nominal flow 64 cbm., nominal head 52.8 m, power 15 kW. The station is equipped with an automatic pressure support system with the ability to remotely monitor and control the operation of pumps, pressure sensors, a dry-running sensor, inlet and outlet manifolds, check valves, shut-off gates. | ||||||
| 9 | Booster station based on grundfos pumps | SPL WRP-S 2 CR150-1 X-F-A-E | 2 339 265,52 | 2 226 980,77 | 2 672 376,93 | |
| Nominal feed 150 cubic meters per hour, nominal head 18.8 m, power 15 kW. The station is equipped with an automatic pressure support system with the ability to remotely monitor and control the operation of pumps, pressure sensors, a dry-running sensor, inlet and outlet manifolds, check valves, shut-off gates. | ||||||
