Flamcomat ADF is used to maintain constant pressure, compensation for temperature expansion, deaeration and compensation for coolant losses in closed systems heating or cooling.
Flamcomat AUPD maintains the required pressure in the system in a narrow range (± 0.1 bar) in all operating modes, and also compensates for thermal expansion of the coolant in heating or cooling systems. In the standard version, the Flamcomat AUPD installation consists of the following parts:
The water and air in the tank are separated by a replaceable membrane made of high-quality butyl rubber, which is characterized by very low gas permeability.
Deaeration in the Flamcomat AUPD is based on the principle of pressure reduction (throttling). When the coolant under pressure enters the expansion tank of the installation (non-pressure or atmospheric), the ability of gases to dissolve in water decreases. Air is separated from the water and discharged through an air vent installed in the upper part of the tank. To remove as much air as possible from the water, a special compartment with PALL rings is installed at the coolant inlet to the expansion tank: this increases the deaeration capacity by 2-3 times compared to conventional installations.
Automatic make-up compensates for the loss of coolant volume occurring 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.
Automatic pressure maintenance unit Flamcomat (control via pumps)
Application area
Flamcomat AUPD is used to maintain constant pressure, compensate for thermal expansion, deaerate and compensate for coolant losses in closed heating or cooling systems.
*If the system temperature at the installation connection point exceeds 70 °C, it is necessary to use a Flexcon VSV intermediate vessel, which ensures cooling of the working fluid before installation (see chapter “VSV Intermediate Vessel”).
Purpose of 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.
Installation of Flamcomat AUPD as standard
consists of the following parts:
. membrane expansion tank;
. Control block;
. connection to the tank.
The water and air in the tank are separated by a replaceable membrane 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 membrane expansion tank (the pressure in which is equal to atmospheric pressure).
When the set pressure in the system is reached, the solenoid valve closes and blocks the flow of liquid from the system to the expansion tank.
As 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 operates until the pressure in the system rises to the set level.
Constant monitoring of the water level in the tank protects the pump from running dry and also protects 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.
If the performance of 1 pump in the pressure line is not enough, the 2nd pump will be activated (control unit D10, D20, D60 (D30), D80, D100, D130). The Flamcomat automatic propulsion unit with two pumps has a safety system: if one of the pumps or solenoids fails, the second one is automatically turned on.
To equalize the operating time of pumps and solenoids during operation of the installation and increase the service life of the installation as a whole by two times pumping units used
“working-standby” switching system between pumps and solenoid valves (daily).
Error messages regarding pressure value, tank fill level, pump operation and solenoid valve operation are displayed on the control panel of the SDS module.
Deaeration
Deaeration in the Flamcomat AUPD is based on the principle of pressure reduction (throttling, Fig. 2). When the coolant under pressure enters the expansion tank of the installation (non-pressure or atmospheric), the ability of gases to dissolve in water decreases. Air is separated from the water and 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
PALL rings: this increases the deaeration capacity by 2-3 times compared to conventional installations.
In order to remove as much excess gas as possible from the system, an increased number of cycles as well as an increased cycle time (both depending on tank size) are pre-programmed into the factory installation program. 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 you have an SDS module 32).
Recharge
Automatic make-up compensates for the loss of coolant volume occurring 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 coolant volume 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 may be limited by the make-up time in the program. When this time is exceeded, action must be taken to correct the problem. After this, if the make-up time has not changed, the same volume of water can be added to the system.
In installations where pulse flowmeters are used (optional), make-up will be turned off when the programm is reached.
limited volume of water. If the make-up line
The Flamcomat AUPD will be connected directly to the drinking water supply system, it is necessary to install a filter and backflow protection (hydraulic shut-off valve is an option).
Main elements of the Flamcomat automatic transmission unit
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AUPD Flamcomat M0 GB 300
A. Bondarenko
The use of automatic pressure maintenance units (AUPD) for heating and cooling systems has become widespread due to the active growth in 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 fairly new to Russian market equipment, many specialists in this field have questions: what are standard AUPDs, what are their principles of operation and selection methods?
Let's start with a description of the standard settings. Today, the most common type of AUPD is installations with a pump-based control unit. Such a system consists of a non-pressure expansion tank and a control unit, which are connected to each other. The main elements of the control unit are pumps, solenoid valves, a pressure sensor and a flow meter, and the controller, in turn, provides control of the automatic propulsion unit as a whole.
The principle of operation of these AUPDs 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 to constantly record the liquid level in the tank) opens the solenoid valve on the bypass line. And through it, excess coolant flows from the system into a membrane expansion tank, the pressure in which is equal to atmospheric pressure.
When the set pressure in the system is reached, the solenoid valve closes and blocks the flow of liquid from the system to the expansion tank. As 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 operates until the pressure in the system rises to the set value. Constant monitoring of the water level in the tank protects the pump from running dry and also protects the tank from overfilling. If the system pressure goes beyond the maximum or minimum, one of the pumps or solenoid valves is activated, respectively. If the performance of one pump in the pressure line is not enough, the second pump is activated. It is important that an automatic propulsion unit of this type has a safety system: if one of the pumps or solenoids fails, the second one should automatically turn on.
It makes sense to consider the methodology for selecting an automatic pump based on pumps using a practical example. One of the recently implemented projects is “Residential building on Mosfilmovskaya” (a facility of the DON-Stroy company), in the central heating point which a similar pumping installation is used. The height of the building is 208 m. Its central heating center consists of three functional parts, responsible, respectively, for heating, ventilation and hot water supply. The heating system of the high-rise building is divided into three zones. Total calculated thermal power heating systems - 4.25 Gcal/h.
We present an example of selecting an AUPD for the 3rd heating zone.
Initial data required for calculation:
1) thermal power of the system (zone) N syst, kW In our case (for the 3rd heating zone) this parameter is equal to 1740 kW (initial project data);
2) static height N st (m) or static pressure R st (bar) is the height of the liquid column between the installation connection point and the highest point of the system (1 m liquid column = 0.1 bar). In our case, this parameter is 208 m;
3) volume of coolant (water) in the system V, l. To correctly select an AUPD, it is necessary to have data on the volume of the system. If exact value unknown, the average value of water volume can be calculated from the coefficients given in the table. According to the project, the water volume of the 3rd heating zone V syst is equal to 24,350 l.
4) temperature chart: 90/70 °C.
First stage. Calculation of the volume of the expansion tank for the AUPD:
1. Calculation of expansion coefficient TO ext (%), expressing the increase in the volume of the coolant when it is heated from initial to average temperature, Where T av = (90 + 70)/2 = 80 °C. At this temperature, the expansion coefficient will be 2.89%.
2. Calculation of expansion volume V ext (l), i.e. volume of coolant displaced from the system when it is heated to an average temperature:
V ext = V syst. 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 l.
Where TO zap - safety factor.
Next, we select the standard size of the expansion tank from the condition that its volume must be no 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 calculated volume in half.
In our case, the tank volume will be 1000 liters.
Second phase. Selection of control unit:
1. Determination of nominal operating pressure:
R syst = N syst /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 using special tables or diagrams provided by suppliers or manufacturers. All models of control units can include either one or two pumps. In an AUPD with two pumps, in the installation program you can optionally select the operating mode of the pumps: “Main/backup”, “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 specified in the project.
In our case, the AUPD for the 3rd heating zone should include a free-flow tank with a volume of 1000 liters and a control unit that will ensure that the pressure in the system is maintained at least 21.3 bar.
For example, for this project, an MPR-S/2.7 AUPD for two pumps, PN 25 bar and an MP-G 1000 tank from Flamco (Netherlands) was chosen.
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
SPL® pressure booster units are designed for pumping and increasing the pressure of water in domestic, drinking and industrial water supply systems of various buildings and structures, as well as in fire extinguishing systems.
This is modular high-tech equipment consisting of a pump block, including all the necessary piping, as well as modern system management, guaranteeing energy-efficient and reliable operation, with the availability of all necessary permits.
The use of components from leading global manufacturers taking into account Russian standards, norms and requirements.
SPL® WRP: Designation structure
SPL® WRP: pump set composition
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.
Operating principle of frequency control for all pumps:
1. The controller starts the frequency converter, changing the rotation speed of the pump motor in accordance with the readings of the pressure sensor based on PID control;
2. at the beginning of work, one frequency-controlled pump is always started;
3. The performance of the booster unit changes depending on consumption by turning on/off the required number of pumps and parallel adjustment of the pumps in operation.
4. if the set pressure is not reached and one pump operates at maximum frequency, then after a certain period of time the controller will turn on an additional frequency converter and the pumps are synchronized by rotation speed (pumps in operation operate at the same rotation speed).
And so on until the pressure in the system reaches the set value.
When the set pressure value is reached, the controller will begin to reduce the frequency of all operating frequency converters. If the frequency of the converters remains below the specified threshold for a certain time, additional pumps will be switched off one by one at certain intervals.
To equalize the service life of pump electric motors over time, a function has been implemented to change the sequence of turning on and off pumps. Also provided automatic switching on backup pumps in case of failure of workers. The number of working and standby pumps is selected on the controller panel. Frequency converters, in addition to regulation, provide a smooth start of all electric motors, since they are connected directly to them, which avoids the use of additional devices soft start, limit starting currents of electric motors and increase the service life of pumps by reducing dynamic overloads of actuators 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 load monitoring.
This set of capabilities allows you to avoid the use of additional equipment.
The base of the pumping unit of the SPL® WRP-BL configuration can only have two pumps, and control is implemented only according to the principle of the working-standby pump operating scheme, while the working pump is always involved in working with the frequency converter.
Frequency regulation is the most effective method regulation of pump performance. The cascade principle of pump control implemented in this case using frequency regulation has already firmly established itself as a standard in water supply systems, since it provides serious energy savings and increased system functionality.
The principle of frequency regulation for one pump is based on controlling the frequency converter controller, changing the rotation speed of one of the pumps, constantly comparing the task value with the reading of the pressure sensor. In case of insufficient performance of the operating pump, an additional pump will turn on based on a signal from the controller, and if an accident occurs, the backup pump will be activated.
The signal from the pressure sensor is compared with the set pressure in the controller. The mismatch between these signals sets the rotation speed of the pump impeller. At the beginning of operation, the main pump is selected based on an estimate of the minimum operating time.
The main pump is the pump that is currently powered by the frequency converter. Additional and backup pumps are connected directly to the mains supply or through a soft starter. In this control system, the selection of the number of working/standby pumps is provided from the touch screen of the controller. The frequency converter is connected to the main pump and starts working.
The variable speed pump always starts first. Upon reaching a certain speed of rotation of the pump impeller, associated with an increase in 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 equalize the service life of electric motors over time, a function has been implemented to change the sequence of connecting electric motors to the frequency converter. It is possible to custom change the switching time.
The frequency converter provides regulation and soft start only of the electric motor that is connected directly to it; the remaining electric motors are started directly from the network.
When using electric motors with a power of 15 kW or more, it is recommended to start additional electric motors through soft starters to reduce starting currents, limit water hammer and increase the overall service life of the pump.
The pumps operate based on a signal from a pressure switch set to a certain value. The pumps are switched on directly from the network and operate at full capacity.
The use of relay control in the control of pumping units ensures:
1. maintenance given parameters systems;
2. cascade method of controlling a group of pumps;
3. mutual redundancy of electric motors;
4. Leveling the motor life of electric motors.
In pumping installations designed for two or more pumps, if there is a lack of performance of the operating pumps, the additional pump, which will also be involved in the event of an accident of one of the operating pumps.
The pump is stopped with a specified time delay based on a signal from the pressure switch that the set pressure value has been reached.
If during the next specified time the relay does not detect a drop in pressure, then the next pump stops and then in 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 a float from the storage tank.
Based on their signal, in the absence of water, the control system will turn off the pumps, protecting them from destruction due to dry running.
Provision is made for automatic switching on of backup pumps in the event of worker failure and the ability to select the number of working and backup pumps.
In pumping installations based on 3 pumps or more, it becomes possible to control from an analogue sensor 4-20 MA.
When operating pressure booster systems with a relay pressure maintenance principle:
1. pumps are turned on directly, which leads to water hammer;
2. energy savings are minimal;
3. regulation is discrete.
This is almost unnoticeable when using small pumps up to 4 kW. As the power of the pumps increases, pressure surges when turning on and off become more and more noticeable.
To reduce pressure surges, you can organize the inclusion of pumps with sequential opening of the damper or install an expansion tank.
The installation of soft starters can completely eliminate the problem.
The starting current with direct connection is 6-7 times higher than the rated current, while soft starting is gentle on the electric motor and mechanism. At the same time, the starting current is 2-3 times higher than the rated current, which can significantly reduce pump wear, avoid water hammer, and also reduce the load on the network during start-up.
Direct starting is the main factor leading to premature aging of insulation and overheating of the electric motor windings and, as a consequence, a reduction in its service life by 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. | Cost including VAT, rub. | Wholesale cost. from 10 pcs. in rub. without VAT | Wholesale cost. from 10 pcs. in rub. VAT included |
|---|---|---|---|---|---|---|---|
| SHKTO-NA 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 - PS/IAC/24DC/10/, Quint uninterruptible power supply - UPS/ 24/24DC/10, modem NSG-1820MC, analog module TMZ D18, galvanic isolation, circuit breakers and relays for a power of 1.1 kW | 1 | 722 343,59 | 866 812,31 | 686 226,41 | 823 471,69 | |
| Cabinet of control and telecommunication equipment MEGATRON | SHKTO-NA 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 - PS/IAC/24DC/10/, Quint uninterruptible power supply - UPS/ 24/24DC/10, modem NSG-1820MC, analog module TMZ D18, galvanic isolation, circuit breakers and relays for a power of 1.5 kW | 1 | 722 343,59 | 866 812,31 | 686 226,41 | 823 471,69 |
| Cabinet of control and telecommunication equipment MEGATRON | SHKTO-NA 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 - PS/IAC/24DC/10/, Quint uninterruptible power supply - UPS/ 24/24DC/10, modem NSG-1820MC, analog module TMZ D18, galvanic isolation, circuit breakers and relays for a power of 2.2 kW | 1 | 735 822,92 | 882 987,51 | 699 031,77 | 838 838,12 |
| Cabinet of control and telecommunication equipment MEGATRON. | SHKTO-NA 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 - PS/IAC/24DC/10/, Quint uninterruptible power supply - UPS/ 24/24DC/10, modem NSG-1820MC, analog module TMZ D18, galvanic isolation, circuit breakers and relays for a power of 3.0 kW | 1 | 747 738,30 | 897 285,96 | 710 351,38 | 852 421,66 |
| Cabinet of control and telecommunication equipment MEGATRON | SHKTO-NA 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 - PS/IAC/24DC/10/, Quint uninterruptible power supply - UPS/ 24/24DC/10, modem NSG-1820MC, analog module TMZ D18, galvanic isolation, circuit breakers and relays for a power of 4.0 kW | 1 | 758 806,72 | 910 568,06 | 720 866,38 | 865 039,66 |
| Cabinet of control and telecommunication equipment MEGATRON | SHKTO-NA 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 - PS/IAC/24DC/10/, Quint uninterruptible power supply - UPS/ 24/24DC/10, modem NSG-1820MC, analog module TMZ D18, galvanic isolation, circuit breakers and relays for a power of 7.5 kW | 1 | 773 840,78 | 928 608,94 | 735 148,74 | 882 178,48 |
| Cabinet of control and telecommunication equipment MEGATRON | SHKTO-NA 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 - PS/IAC/24DC/10/, Quint uninterruptible power supply - UPS/ 24/24DC/10, modem NSG-1820MC, analog module TMZ D18, galvanic isolation, circuit breakers and relays for a power of 15 kW | 1 | 812 550,47 | 975 060,57 | 771 922,94 | 926 307,53 |
| Cabinet of control and telecommunication equipment 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 rub. without VAT | Wholesale price from 10 pcs. in rub. VAT included |
|---|---|---|---|---|---|---|
| 1 | SPL WRP-S 2 CR10-3 X-F-A-E | 714 895,78 | 681 295,67 | 817 554,81 | ||
| Rated flow 10 m3, rated head 23.1 m power 1.1 kW. The station is equipped with an automatic pressure support system with the ability to provide remote monitoring and control of pump operation, pressure sensors, dry running sensor, intake and pressure manifolds, check valves, shut-off valves. | ||||||
| 2 | Pressure boosting pump 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 | |
| Rated flow 17 m3, rated head 33.2 m power 3 kW. The station is equipped with an automatic pressure support system with the ability to provide remote monitoring and control of pump operation, pressure sensors, dry running sensor, intake and pressure manifolds, check valves, shut-off valves. | ||||||
| 3 | Pressure boosting pump 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 | |
| rated flow 21 m.cub.h., rated head 34.6 m power 4 kW. The station is equipped with an automatic pressure support system with the ability to provide remote monitoring and control of pump operation, pressure sensors, dry running sensor, intake and pressure manifolds, check valves, shut-off valves. | ||||||
| 4 | Pressure boosting pump station based on grundfos pumps | SPL WRP-S 2 CR5-9 X-F-A-E | 683 021,93 | 650 919,89 | 781 103,87 | |
| nominal flow 5.8 m.cub.h., nominal head 42.2 m power 1.5 kW the station is equipped with an automatic pressure support system with the ability to provide remote monitoring and control of pump operation, pressure sensors, dry running sensor, receiving and pressure manifolds, check valves, shut-off valves. | ||||||
| 5 | Pressure boosting pump 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 | |
| rated flow 45 m.cub.h., rated head 72.1 m power 15 kW the station is equipped with an automatic pressure support system with the ability to provide remote monitoring and control of pump operation, pressure sensors, dry running sensor, intake and pressure manifolds, check valves, shut-off valves shutters. | ||||||
| 6 | Pressure boosting pump 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 m.cub.h., nominal head 15 m power 3 kW the station is equipped with an automatic pressure support system with the ability to provide remote monitoring and control of pump operation, pressure sensors, dry running sensor, intake and pressure manifolds, check valves, shut-off valves. | ||||||
| 7 | Pressure boosting pump 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 flow 5.8 m3/h, rated head 66.1 m power 2.2 kW. The station is equipped with an automatic pressure support system with the ability to provide remote monitoring and control of pump operation, pressure sensors, dry running sensor, intake and pressure manifolds, check valves, shut-off valves. | ||||||
| 8 | Pressure boosting pump 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 | |
| rated flow 64 m3, rated head 52.8 m power 15 kW. The station is equipped with an automatic pressure support system with the ability to provide remote monitoring and control of pump operation, pressure sensors, dry running sensor, intake and pressure manifolds, check valves, shut-off valves. | ||||||
| 9 | Pressure boosting pump 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 | |
| Rated flow 150 m3, rated head 18.8 m power 15 kW. The station is equipped with an automatic pressure support system with the ability to provide remote monitoring and control of pump operation, pressure sensors, dry running sensor, intake and pressure manifolds, check valves, shut-off valves. | ||||||
Pressure boosting units are pumping stations, which include from 2 to 4 multi-stage vertical Boosta pumps.
Boosta pumps are mounted on a common frame and connected to each other by suction and pressure pipes. The pumps are connected to the collectors using shut-off valves and check valves.
The control cabinet is mounted on a stand mounted on the frame.
Maintaining constant pressure is ensured by regulating the rotation speed of the pump to which the frequency converter is connected.
