Installation of pressure maintenance SPL 2 10. Automatic pressure maintenance settings in modern heating systems. Frequency regulation on all SPL® WRP-A Pumps

Many years of experience in designing and operating high-rise buildings allows us to formulate the following conclusion: the basis of the reliability and efficiency of the heating system as a whole is the observance of the following technical requirements:

1. The constancy of the pressure of the coolant in all operating modes.
2. Constability chemical composition coolant.
3. The absence of gases is free and dissolved.

Failure to fulfill at least one of these requirements leads to increased wear of heat engineering equipment (radiators, valves, thermostats, etc.) In addition, the consumption of thermal energy increases, and accordingly, material costs increase. To ensure that these requirements allow the installation of pressure, automatic feeding and removal of gases, for example, the company "Eder", the main supplier of which to the Russian market for more than 10 years is "Hertz Armaturen".

EDER EQUIPMENT Consists of separate modules that provide maintaining pressure, feeding and degarison of the coolant. The pressure module of the coolant consists of an expansion tank 1, in which there is an elastic chamber 2, which prevents the contact of the coolant with air and directly with the walls of the tank, which favorably distinguishes the expansion settings "Eder" from the membrane type expansion, in which the tank walls are subject to corrosion For contact with water.

With an increase in the pressure in the system caused by the expansion of water during heating, the valve 3 opens, and excess water from the system enters expansion tank. When cooling and, accordingly, a decrease in the volume of water in the system, the pressure sensor 4 is triggered, including the pump 5 pumping the coolant from the tank into the system until the pressure in the system becomes equal to the specified one.

MODUME B allows you to compensate for the loss of the coolant in the system resulting from of various types Leaks. When the water level decreases in the tank 1 and reaching the specified minimum value, the valve 6 opens and water from the cold water supply system comes into the expansion tank. When a user-defined level is reached, the valve is turned off and stopped.

When operating heating systems in high-rise buildings, the need for a coolant degassing is most acute. The existing air vents are allowed to get rid of the "convulsion" of the system, but do not solve the problem of water purification from gas dissolved in it, primarily atomic oxygen and hydrogen, causing not only corrosion, but also high speeds and the pressure of the coolant cavitation, destroying system devices: pumps, valves and fittings.

When using modern aluminum radiators Due to the chemical reaction in water, hydrogen is formed, the accumulation of which is able to lead to the rupture of the radiator body, with all the "consequences" arising from it in the degassing module, the physical method of continuous removal of dissolved gases is used due to a sharp decline in pressure.

With a short-term opening of the valve 9 in a given volume (approx. 200 L) 8, the water pressure exceeds 5 bar, falls to atmospheric for a fraction of a second. In this case, there is a sharp release of dissolved gases dissolved in water (the effect of opening the bottle of champagne). A mixture of water and gas bubbles is fed into the expansion tank 1. The tank of the degassing tank 8 is carried out from the expansion tank 1 of the water purified from the gas.

Gradually, the entire volume of the coolant in the system will be fully cleaned of impurities and gases. The higher the static height of the heating system, the higher the requirements for degassing and the constancy of the pressure of the coolant. All these modules are controlled by a microprocessor unit D, having diagnostic functions and the possibility of including automated systems dispatching.

The use of installations "Eder" is not limited to high-rise buildings. It is advisable to use their use in structures with an extensive heating system (sports facilities, supermarkets, etc.). Compact installations of the EAS, in which the expansion tank of up to 500 l is articulated with the control cabinet, can be successfully used as a supplement to autonomous systems Heating in individual construction. Installations of the company "Eder", successfully operating in all high-rise buildings of Germany, is a choice in favor of modern engineering system Heating.

Pressure maintenance installations (UPS, AUPD, injection and expansion machines) are complex technical systemsintended to maintain pressure in heating and cooling circuits. This equipment has become in demand in our country in last years In connection with the growth of high-rise construction caused by urbanization processes. Pump and compressor automatic pressure maintenance settings FLAMCO. Come on the change of traditional expansion tanks in heating and cooling systems in all ranges of operating pressure and temperatures.

The main advantage of the UPS of all manufacturers (FLAMCO, etc.) is an increased coefficient of use of tank drives (about 0.9). In the case of pumping facilities, the excess coolant is in non-free containers. To maintain pressure in the system at the required level, the coolant is either added to the pump system (pumps), or is reset to the tank drive through the valve with electro-motor drives. Compressor Aoupes are essentially modified traditional membrane expansion tanks, the pressure in which is regulated by the compressor and reset valvesManaged automatics.

The use of AUPD FLAMCO instead of membrane expansion tanks allows you to quickly establish the working pressure in heating and cold supply systems in wide ranges. When using conventional membrane tanks to change the operating pressure in the system, the tank should be empty and adjust the pressure in it. The same procedure must be carried out at each maintenance Boiler room.

All FLAMCO Pressure Maintenance Installations are equipped with a reliable powerful electric part and unique. microprocessor control with LCD display. The original SPCX-LW (HW) automatics has several access levels that allow you to securely protect the settings from foreign intervention. Backup System Settings can be saved on an SD card by our specialist in implementing commissioning work. The automation has the ability to remotely control the functioning. This feature is pretty simple in implementation, unlike the AUPD of other manufacturers.

In all compressor and pumping UPS FLAMCO implemented the possibility of intelligent feeding control. In the pumping aoupe there is a feedback going through the tank drive, in compressor - directly into the heating system (cold supply).

Pumping UPS FLAMCO - FLAMCOMAT - equipped with a function of intelligent degassing system, which allows to reduce up to a minimum gas content in the coolant and, accordingly, significantly reduce the corrosion load on pipelines, heating devices, heat exchangers and boobagners.

A. Bondarenko

The use of automatic pressure maintenance (AUDD) for heating and cooling systems was widespread due to the active growth of high-rise construction.

AUPD performs the functions of maintaining constant pressure, compensation of temperature extensions, deaeration of the system and compensation for the loss of the coolant.

But since it is quite new for russian market Equipment, many specialists in this area have questions: What are standard Aoupes, what are the principles of their action and the method of selection?

Let's start with the description standard installations. Today, the most common type of AUPD is installations with pump-based control unit. A similar system consists of a non-pressure expansion tank and a control unit that is interconnected. The main elements of the control unit are the pumps, solenoid valves, the pressure sensor and the flow meter, and the controller, in turn, ensures the AUPD control as a whole.

The principle of the AWD data is as follows: when heated, the coolant in the system is expanding, which leads to an increase in pressure. Pressure sensor fixes this increase and sends a calibrated signal to the control unit. Control unit (using a weight sensor (filling) constantly fixing the fluid level in the tank) opens the solenoid valve on the cross-line. And through it, the excess coolant flows from the system into the membrane expansion tank, the pressure in which is equal to the atmospheric.

Upon reaching a given pressure value in the system, the solenoid valve closes and overlaps the fluid flow from the system into the expansion tank. When cooled coolant in the system, its volume decreases, and 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 a specified value. Permanent control of the water level in the tank protects the pump from the "dry" stroke, and also protects the tank from overflow. If the pressure in the system goes beyond the maximum or minimum, one of the pumps or solenoid valves is triggered, respectively. If the performance of one pump in the pressure line is missing, the second pump is activated. It is important that the APD of this type has a security system: when one of the pumps or solenoid solenoids, the second must automatically be turned on.

The procedure for the selection of AUPD on the basis of pumps makes sense to consider on the example of practice. One of the recently implemented projects is the "residential building at Mosfilmovskaya" (the object of the Don-Stroy company), in the central thermal station of which a similar pumping unit was applied. The height of the building is 208 m. Its CTP consists of three functional parts corresponding to, respectively, for heating, ventilation and hot water supply. The heating system of the high-rise body is divided into three zones. Total settlement thermal power Heating systems - 4.25 Gcal / h.

We present an example of the selection of AUPD for the 3rd zone of heating.

Initial datarequired for calculation:

1) thermal power system (zone) N. Syst, kW. In our case (for the 3rd heating zone), this parameter is 1740 kW (source data of the project);

2) static height N. st (m) or static pressure R Art (bar) is the height of the fluid pillar between the point of connection of the installation and the highest point of the system (1 M of the liquid column \u003d 0.1 bar). In our case, this parameter is 208 m;

3) the volume of 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 by the coefficients shown in tab. According to the project Water Volume 3rd Heating Area V. Sist is 24 350 liters.

4) temperature schedule: 90/70 ° C.

First stage. Calculation of the volume of the expansion tank to AUPD:

1. Calculation of the expansion coefficient TO rashes (%) expressing the increase in the volume of the coolant when it is heated from the initial to the average temperature, where T. CP \u003d (90 + 70) / 2 \u003d 80 ° C. At this temperature, the expansion coefficient will be 2.89%.

2. Calculation of expansion volume V. Rasha (L), i.e. The volume of the coolant displaced from the system when it is heated to the average temperature:

V. Rasha \u003d. V. Syst. K. rashes / 100 \u003d 24350. 2.89 / 100 \u003d 704 liters.

3. Calculation of the calculated volume of the expansion tank V. B:

V. B \u003d V. rash. TO Zap \u003d 704. 1,3 \u003d 915 liters.
Where TO Zap - stock coefficient.

Next, select the expansion tank size size from the condition that its volume should be no less than the calculated one. If necessary (for example, when there are limitations on dimensions), the AUPD can be supplemented with an additional tank, breaking 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 \u003d N. System / 10 + 0.5 \u003d 208/10 + 0.5 \u003d 21.3 bar.

2. Depending on the values R SIST I. N. System Select the control unit using special tables or charts represented by suppliers or manufacturers. All models of control blocks can be included as one pump and two. In the AUPD with two pumps in the installation program, you can choose the operation mode of the pumps: "Basic / Standby", "alternate operation of pumps", "parallel operation of pumps".

This is the calculation of the AWD ends, and the project is prescribed the volume of the tank and the marking of the control unit.

In our case, the AUPD for the 3rd zone of heating should include a non-valve tank with a volume of 1000 liters and a control unit that will ensure maintenance of pressure in a system of at least 21.3 bar.

For example, for this project, AUPD MPR-S / 2.7 was chosen into two pumps, RU 25 bar and the MP-G 1000 tank 1000 FLAMCO (Netherlands).

In conclusion, it is worth mentioning that there are also settings based on compressors. But this is a completely different story ...

The article is provided by Adl

SPL® pressure boost installations are designed for pumping and increasing water pressure in the systems of drinking 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, which includes all the necessary strapping, as well as a modern management system, guaranteeing energy efficient and reliable work, With the presence of all necessary permits.

The use of components of the world's leading manufacturers, taking into account Russian standards, norms and requirements.

SPL® WRP: Conventional Structure

SPL® WRP: Pumping Composition

Frequency regulation on all SPL® WRP-A Pumps

The frequency control system for all pumps is designed to control and control the standard asynchronous hydrodmotors of the pumps of one size in accordance with external control signals. This control system provides the ability to control from one to six pumps.

Principle of operation of frequency regulation on all pumps:

1. The controller launches the frequency converter to work, changing the rotational speed of the pump in accordance with the testimony of the PID-control pressure-based pressure sensor;

2. At the beginning of work, one frequency-adjustable pump is always launched;

3. The productivity of the boost installation changes depending on consumption by turning on / off the required number of pumps and parallel adjustment of the pumps in operation.

4. If the specified pressure is not achieved, and one pump operates at the maximum frequency, then after a certain period of time, the controller will turn on the additional frequency converter to work, and the pumps are synchronized by the frequency of rotation (the pumps in operation are operated with an equal speed of rotation).

And so as long as the pressure in the system does not reach the specified value.

When the specified pressure value is reached, the controller will begin to reduce the frequency of all operating frequency converters. If within a certain time the frequency of the converters is below the specified threshold, the additional pumps will be disconnected alternately after certain intervals.

To align the resource of electric motors of the pumps in time, the change function of the sequence of switching on and off pumps is implemented. It is also provided for automatic inclusion of backup pumps in case of failure of workers. The choice of the number of workers and backup pumps is made on the controller panel. Frequency converters except regulation provide smooth start all electric motors, as connected directly to them, which avoids the use additional devices Smooth start, limit the starting currents of the hydrodmotors and increase the operational resource of the pumps by reducing the dynamic overloads of the actuators when starting and stopping the deposits.

For water supply systems, this means the absence of hydrowards when starting and stopping additional pumps.

For each motor, the frequency converter allows you to implement:

1. Rotation frequency control;

2. Termination protection, braking;

3. Mechanical load monitoring.

Mechanical load monitoring.

This set of features avoids the use of additional equipment.

Frequency regulation on one pump SPL® WRP-B (BL)

The SPL® WRP-BL Pump Installation Base can be only two pumps, and the control is implemented only on the principle of the work and backup pump, while the working pump is always involved in working with the frequency converter.

Frequency regulation is the most effective method Performance control pumps. The cascading principle of pump management using frequency regulation has already been firmly established 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 control per pump is based on controlling the frequency converter controller, changing the speed of rotation of one of the pumps, constantly comparing the value of the task with the pressure sensor reading. In the event of a lack of performance of the operating pump on a signal from the controller, an additional will turn on, and if an accident occurs, the backup pump will be activated.

The signal from the pressure sensor is compared with a predetermined pressure B controller. Missing between these signals sets the frequency of rotation of the pump impeller. At the beginning of work, the main pump is selected based on the estimation of the time of minimum developments.

The main pump is ZTO pump, which in this moment Works from frequency converter. Additional and backup pumps are connected directly to the power supply network or through a smooth starter. In this control system, the selection of the number / backup pumps is provided from the controller's touchscreen display. The frequency converter connects to the main pump and starts work.

The frequency-adjustable pump always starts first. Upon reaching a certain frequency of rotation of the impeller of the pump associated with the increase in water consumption in the system, the next pump is included. And so as long as the pressure in the system does not reach the specified value.

To align the voltage resource in time, the change function of the sequence sequence to the frequency converter is implemented. There is the possibility of a custom change time change.

The frequency converter provides adjustment and smooth start of the electric motor that is connected directly to it, the remaining electric motors are started directly from the network.

When using electricity electricity from 15 kW, additional electric motors are recommended through soft starters to reduce starting currents, hydroward restrictions and increasing the overall pump resource.

Relay regulation SPL® WRP-C

The operation of pumps is carried out by a signal from a pressure relay configured to a certain value. Pumps are included directly from the network and work with full performance.

Application of relay control in pumping installation management provides:

1. Maintain the specified system parameters;

2. Cascade method of controlling a group of pumps;

3. Mutual redundancy of hydrolymotuses;

4. Alignment of engine dishes.

IN pumping installationsExtraked for two pumps and more, with a lack of performance of working pumps, an additional pump is included, which will also be involved in the accident of one of the operating pumps.

Stopping the pump is carried out with a given time delay by a signal from the pressure relay on the achievement of a given pressure value.

If during the next predetermined time the relay does not record the pressure drops, then the subsequent pump stops and then the cascade to stop all pumps.

The pumping cabinet receives the signals from the dry-running protection relay, which is installed on the suction pipe, or from the float from the accumulative tank.

By their signal, in the absence of water, the control system will turn off the pumps, protecting against destruction due to dry running.

There are automatic inclusion of backup pumps in case of failure of workers and the ability to select the number of workers and backup pumps.

In the pumping installations on the basis of 3 pumps and the ability to control and from the analog sensor 4-20 mA appears.

When operating installations for increasing pressure with a relay principle of maintaining pressure:

1. Pumps are included directly, which leads to hydrowards;

2. Electricity savings are minimal;

3. Regulation is discrete.

It is almost unnoticed when using small pumps with a capacity of up to 4 kW. With increasing power of pump jump pumps, when turned on and off, becomes more and more noticeable.

To reduce pressure jumps, you can organize the inclusion of pumps with a sequential opening of the damper or install an expansion tank.

Fully remove the problem allows the installation of soft starters.

Starting current with direct inclusion is 6-7 times higher than the nominal, while the smooth start is gentle for the electric motor and the mechanism. At the same time, the starting current is higher than the nominal 2-3 times, which makes it possible to significantly reduce the wear of the pumps, avoid hydrowards, and also reduce the load on the network during start-up.

The direct launch is the main factor leading to premature aging of isolation and overheating of the motor windings and, as a result, a decrease in its resource several times. The actual life of the electric motor is more dependent on the time of operation, but on the total number of launches.

Name of product	Brand, model	Specifications	number	Cost without VAT, rub.	Cost with VAT, rub.	The cost of the wholesale. from 10 pcs. in rubles. without VAT	The cost of the wholesale. from 10 pcs. in rubles. VAT included
	Skto-per 1.1	VCHHHG 1000 * 800 * 300, Modicon TM221 controller block 40 inputs / outputs, 24VDC power, built-in Ethernet port, Magelis STU 665 operator panel, Pulse power supply QUINT - PS / IAC / 24DC / 10 /, block uninterrupted power Quint - UPS / 24 / 24DC / 10, NSG-1820MC modem, analog module TMZ D18, galvanic junction, circuit breakers and power relays 1.1 kW	1	722 343,59	866 812,31	686 226,41	823 471,69
Cabinet of controller and telecommunication equipment Megatron	Skto-by 1.5	1000 * 800 * 300, Modicon TM221 40 inputs 40 inputs / outputs block, 24VDC power, Built-in Ethernet port, Magelis STU 665 operator panel, Pulse power supply QUINT - PS / IAC / 24DC / 10 /, Uninterruptible Power Unit Quint - UPS / 24 / 24DC / 10, NSG-1820MC modem, analog module TMZ D18, electroplating union, circuit breakers and power relays 1.5 kW	1	722 343,59	866 812,31	686 226,41	823 471,69
Cabinet of controller and telecommunication equipment Megatron	Skto-by 2.2	1000 * 800 * 300, Modicon TM221 40 inputs 40 inputs / outputs block, 24VDC power, Built-in Ethernet port, Magelis STU 665 operator panel, Pulse power supply QUINT - PS / IAC / 24DC / 10 /, Uninterruptible Power Unit Quint - UPS / 24 / 24DC / 10, Modem NSG-1820MC, analog module TMZ D18, electroplating junction, circuit breakers and power relays 2.2 kW	1	735 822,92	882 987,51	699 031,77	838 838,12
Cabinet of controller and telecommunications equipment Megatron.	Skto-by 3.0	1000 * 800 * 300, Modicon TM221 40 inputs 40 inputs / outputs block, 24VDC power, Built-in Ethernet port, Magelis STU 665 operator panel, Pulse power supply QUINT - PS / IAC / 24DC / 10 /, Uninterruptible Power Unit Quint - UPS / 24 / 24DC / 10, NSG-1820MC modem, analog module TMZ D18, galvanic junction, circuit breakers and power relays 3.0 kW	1	747 738,30	897 285,96	710 351,38	852 421,66
Cabinet of controller and telecommunication equipment Megatron	Skto-by 4.0	1000 * 800 * 300, Modicon TM221 40 inputs 40 inputs / outputs block, 24VDC power, Built-in Ethernet port, Magelis STU 665 operator panel, Pulse power supply QUINT - PS / IAC / 24DC / 10 /, Uninterruptible Power Unit Quint - UPS / 24 / 24DC / 10, NSG-1820MC modem, analog module TMZ D18, electroplating junction, circuit breakers and power relays 4.0 kW	1	758 806,72	910 568,06	720 866,38	865 039,66
Cabinet of controller and telecommunication equipment Megatron	Skto-by 7.5	1000 * 800 * 300, Modicon TM221 40 inputs 40 inputs / outputs block, 24VDC power, Built-in Ethernet port, Magelis STU 665 operator panel, Pulse power supply QUINT - PS / IAC / 24DC / 10 /, Uninterruptible Power Unit Quint - UPS / 24 / 24DC / 10, Modem NSG-1820MC, analog module TMZ D18, electroplating junction, circuit breakers and power relays 7.5 kW	1	773 840,78	928 608,94	735 148,74	882 178,48
Cabinet of controller and telecommunication equipment Megatron	SKTO-by 15	1000 * 800 * 300, Modicon TM221 40 inputs 40 inputs / outputs block, 24VDC power, Built-in Ethernet port, Magelis STU 665 operator panel, Pulse power supply QUINT - PS / IAC / 24DC / 10 /, Uninterruptible Power Unit Quint - UPS / 24 / 24DC / 10, NSG-1820MC modem, analog module TMZ D18, galvanic junction, circuit breakers and power relays 15 kW	1	812 550,47	975 060,57	771 922,94	926 307,53
Cabinet of controller and telecommunication equipment Megatron	Hp	VCHHHg 500x400x210 S. circuit board, 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	Price wholesale from 10 pcs. in rubles. without VAT	Price wholesale 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 feeding of 10 M.Kub. Oh., Nominal pressure 23.1 m Power 1.1 kW. The station is equipped with a pressure support automation system with the possibility of providing remote control and control of pump operation, pressure sensors, a dry-end sensor, receiving and pressure manifolds, check valvesshut-off shutters.
2	Pressure Pressure 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 feeding of 17 M.Kub. Oh., Nominal pressure 33.2M power 3 kW. The station is equipped with a pressure support automation system with the possibility of providing remote control and control of pump operation, pressure sensors, a dry-end sensor, receiving and pressure manifolds, check valves, shutters.
3	Pressure Pressure 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 feeding of 21 m.Kub. Oh., Nominal pressure 34,6m Power 4 kW. The station is equipped with a pressure support automation system with the possibility of providing remote control and control of pump operation, pressure sensors, a dry-end sensor, receiving and pressure manifolds, check valves, shutters.
4	Pressure Pressure 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 feed 5.8 m.Kub. Oh., Nominal pressure 42,2m Power 1.5 kW Station is equipped with a pressure support automatic system with the ability to ensure remote control and control of pump operation, pressure sensors, a dry-end sensor, receiving and pressure manifolds, check valves covering shutters.
5	Pressure Pressure 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 feeding 45 M.Kub. Oh., Nominal pressure 72.1m Power of 15 kW Station is equipped with a pressure support automation system with the ability to ensure remote control and control of pump operation, pressure sensors, drying sensor, receiving and pressure manifolds, check valves, shut-off shutters.
6	Pressure Pressure 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 feeding 45 M.Kub. Oh., Nominal pressure 15M Power 3 kW Station is equipped with a pressure support automation system with the ability to ensure remote control and control of pumps, pressure sensors, a dry running sensor, receiving and pressure manifolds, check valves, shutters.
7	Pressure Pressure Station based on Grundfos Pumps	SPL WRP-S 2 CR5-13 X-F-A-E		863 574,18	822 986,19	987 583,43
		nominal feed 5.8 M.Kub., Nominal pressure 66.1m power 2.2 kW. The station is equipped with a pressure support automation system with the possibility of providing remote control and control of pump operation, pressure sensors, a dry-end sensor, receiving and pressure manifolds, check valves, shutters.
8	Pressure Pressure 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 feed 64 М.KUB., Nominal pressure 52.8M power 15 kW. The station is equipped with a pressure support automation system with the possibility of providing remote control and control of pump operation, pressure sensors, a dry-end sensor, receiving and pressure manifolds, check valves, shutters.
9	Pressure Pressure 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 feeding 150 m.Kub. Oh., Nominal pressure 18.8m power 15 kW. The station is equipped with a pressure support automation system with the possibility of providing remote control and control of pump operation, pressure sensors, a dry-end sensor, receiving and pressure manifolds, check valves, shutters.

Installation of pressure maintenance - This is a special system that is used to maintain constant heat supply at various objects. To date, such devices can be found on a wide variety of objects. It may be an administrative building, and residential buildings, and shopping complexes, and manufacturing workshops. The main task of such an automatic device is to maintain a stable pressure level. Such devices are compatible with closed systems Heating and water supply.

Devices can be equipped with powerful supplied blocks. In this case, the power capacity also increases. Since the membrane material is able to work exclusively at a certain temperature range. Accordingly, the devices are best connected to those points where the temperature of the coolant does not exceed a certain indicator. If we talk about butyl tanks, they are recommended to be installed on the reverse line of the heating system. In the event that the temperature is higher, the expansion tank is connected using a series connected intermediate tank. Installation of pressure maintenance requires competent installation.

The installation consists of the following items:
- expansion tank (or tank systems);
- regulating reinforcement;
- electronic devices.

Principle of operation.
Due to the unique membrane, the pressure is equalized between water and air, which are in the accumulative container. In case very low pressure The compressor begins to pump air. Thus, when too high pressure the air begins to go through specialized solenoid valve. This principle of operation is tested by time. In its reliability, you can not doubt. Leading manufacturers prefer to him. This once again proves many advantages of the principle. Many manufacturer in order to delay the air in the tank, do not give it to dissolve in the water, the manufacturer shares the air and air chamber Specialized membrane made of butylene.
Installation of pressure maintenance modern model able to work smoothly even on small square. In some systems, the unit is mounted on the side or from above to the expansion tank, on the console. As a result, ensured high level Efficiency at the minimum area.

Modular principle - ensuring special features.
As a rule, the modular principle applies to equipment that has a power of up to 24 MW. In this case, the compressor and the desired number of additional containers are mounted next to the main container, which are necessary for the full operation of the system.

Automation of installation.
Pressure maintenance can be fully automated. In this case, the device is equipped with an automatic controlled feed. Charging is carried out depending on the amount of water in the main tank. In this case, it is possible to simultaneously use various vacuum installations. Thanks to this approach, the need to make the need to make in the highest points of the system will disappear.

Installation of pressure maintenance - advantage of use.
Comprehensive features include features:
- the pressure in the system is supported by a slight fluctuation;
- if necessary, the device carries out an automatic feeding;
- the system independently carries out the deaeration of water in the system;
- no air even at the highest point of the system is guaranteed;
- There is no need to acquire expensive air vent and holding a manual deaeration.

In addition to the above advantages, you can also note the silent operation of modern installations. When working on full power Equipment functions reliably. The water circuit is practically no air. Such a feature guarantees the lack of corrosion, erosion. Moreover, the system is less contaminated, wears, the best circulation in the system is ensured. Improving heat exchange is ensured by the fact that there is no boiler boiler on the heat exchanger. Compared with membrane tanks, Installation of pressure maintenance is different.

Low noise in the process of operation allows you to install devices in rooms with high sound insulation requirements. The mode of operation of such a system is fully automated. Thus, the installation can be integrated into any modern system, which is distinguished by constructive complexity. A special anti-corrosion agent is applied on the surface that in contact with water. Any modern pressure maintenance setting complies with existing sanitary requirements.
Power and other performance indicators.

Installation of pressure maintenance may have the most different power. Naturally, the volume of the tank increases with increasing power. Such a feature is explained by the fact that the extension can be compensated for a large volume of capacity. At the same time, the ratio of the total volume of tanks to the volume of the extension of the coolant is also growing.