Reflex membrane expansion tanks: design and operating features. Diaphragm expansion tank for heating system reflex Diaphragm expansion tank reflex

Membrane expansion tanks from Reflex Winkelmann GmbH are used in water supply and heating systems. They differ reliable design, which is confirmed by laboratory tests and reviews from technical specialists. The tanks meet international quality standards (DIN 1988), characterized by a long service life and impeccable membrane strength. Features of these tanks:

  • Increased wear resistance;
  • Corrosion resistance;
  • Big choice models for any needs;
  • Affordable price.

Reflex expansion tanks are available in dozens of models. They are divided into two categories - for water supply and heating. Tanks for heating systems are produced in the form of several model lines. They are resistant to increased coolant pressure due to the uniform distribution of the load over the entire surface of the membranes. Some of them are designed in welded housings, the membranes in them are non-removable.

One of the most popular lines in the world is Reflex N. These tanks are equipped with non-removable membranes and are resistant to wear. Due to their small volume, they are used in small heating systems, including domestic ones. They are characterized by a floor-mounted design, for which metal legs are provided. The manufacturer also presented consumers with increased-volume tanks designed for use in heating systems large volume- many of them are equipped with removable membranes. Separately presented is a line of tanks for systems with solar collectors and a line of tanks for wall-mounted gas boilers (the latter are distinguished by their compact design and flat body shape).

Reflex membrane tanks for water supply needs are presented in separate model ranges. They are used in conjunction with pumping and water heating units, as well as with hydropneumatic accumulators. Buyers can choose from models with replaceable and non-replaceable membranes that can withstand high loads. Another type of membrane tanks from the Reflex company are hydrodynamic shock compensators. They are designed to absorb water hammer in water pipes. Their installation is carried out directly in front of the connected consumers - these are washing and dishwashers, water heaters and indirect heating boilers.

You can buy Reflex membrane tanks in the Teplodvor online store. Buyers can choose from models for heating and water supply systems. Tanks are different the highest level reliability, they come with an official warranty from the manufacturer. We will deliver your purchases throughout Moscow and Russia, we will offer optional equipment for installation of heating and water supply systems.

The German company Reflex offers the widest range of expansion tanks for water supply, water treatment and heating on the market. They are closed containers with a rubber membrane that separates the gas zone (nitrogen cushion) from the liquid compartment.

Designed to accumulate and store a reserve supply of water (made from environmentally friendly materials that are safe for human health), maintain pressure in the circuit, and prevent water hammer. For the heat supply system, any Reflex expansion tank (expanzomat) is equipped with an elastic heat-resistant membrane. Its main task is to serve as a damper, to maintain required pressure. When heated, excess liquid collects inside, which, when cooled, returns to the circuit. Also, it performs protective function from water hammer.

Classification

Modern expansion membrane tanks produced by Reflex for cooling and heating systems are made of steel and coated with a polymer composition to protect against corrosion; Available in red or white. The gas (nitrogen) chamber of many models is filled at the factory to a pressure of 1.5 bar. They are supplied with a replaceable shell or a non-replaceable membrane. The equipment differs in shape, nominal volume, size and operates in different pressure ranges (from 3 to 10 bar). Maximum permissible temperature for most expansion machines - 120 °C. Small volume models, such as expansion tanks Reflex NG8, are mounted vertically on the wall. Large ones are installed on supports specially designed for this purpose.

All heating options are presented in rows:

1. Welded tanks NG with a permanent membrane, available in capacities from 8 to 140 l, maximum operating pressure is 6 bar. The connection is threaded. Price range - from 1,280 to 13,100 rubles.

2. Expanzomats N have a nominal volume of 200–1000 l and are equipped with a non-replaceable membrane, pressure 6 bar. Reviews indicate that the non-replaceable membrane is highly wear-resistant and is designed for a long service life. Cost - 13,860–75,190 rubles.


3. The Reflex G series are membrane tanks with a replaceable diaphragm. They are offered in a wide variety of models, with nominal capacities from 100 to 1,000 liters or up to 5,000 in special versions. Working pressure 6 or 10 bar, preliminary - 3.5. Equipped with a pneumomanometer, available with a threaded or flanged connection, only in red. The price, as in previous cases, depends directly on the volume. Thus, the cost of the G 100 models is 63,350 rubles, tanks for Reflex G 1000 heating systems can be purchased for 202,370, and types of maximum capacity - for 782,570.

4. S series models are designed specifically for systems with solar collector, operate at pressures up to 10 bar, can be used for refrigeration and heating. Capacity from 2 l to 600 l. The expansion tanks are equipped with a non-replaceable membrane, the connection is threaded. Suitable for use in systems with antifreeze, concentration not exceeding 50%. The price for them ranges from 2,250 (for S 2) to 89,120 rubles (S 600).

5. Reflex F have a flat shape, therefore they can be installed in heating boilers. Nominal capacity 8–24 l. The initial pressure is 0.75 or 1 bar, depending on the model, the maximum pressure is 3 bar. The 8-liter version is round, the rest are rectangular. From F 18 onwards, the housing has mounting hooks. Cost 3,690–6,130 rubles.

6. Expanzomats of the C series, thanks to the improved flat cylindrical shape, can be mounted in boilers. A special loop is provided for placement on the wall. There are models with a non-replaceable butyl rubber membrane, volume 8–80 l, pre-pressure 1–1.5 bar. Maximum - 3 bars. Approved for use in systems with a glycol concentration in the liquid of up to 50%. Cost - 2,840–8,070 rubles.

Reflex tanks are intensively used for technical and drinking water supply. Models of different volumes are used as vessels for water heaters or buffer and damper tanks in booster installations. All water-bearing parts are protected by a special coating against corrosion. Water is stored in rubber bulbs that are hygienic and sanitary standards products for drinking water, are not susceptible to the effects of bacteria.


DD - hydraulic accumulators are designed for use in individual water supply systems with water heating mechanisms; they can be used as dampers in booster installations. Often the design of Reflex membrane tanks of this series is supplemented with Flowjet flow fittings. Available in white or green, from 8 liters to 33 liters. The pre-pressure is 4 bar, the maximum permissible working pressure is 10, equipped with High-Flow (star insert). The price for them ranges from 5,040–12,190 rubles. Model Refix DD 8, 25 bar costs 11,220.

Green expansion tanks Refix DT5 are designed for systems with high water consumption. Volumes from 80 to 3,000 l, with a maximum operating pressure of 10 or 16 bar. Equipped threaded connection and flow fittings with Flowjet drain. The cost of hydropneumatic tanks for 10 bar ranges from 64,230 to 859,480 rubles, and you can buy Reflex expansion tanks of this series for 16 bar for 76,220–995,770.

Refix DE tanks are pneumatic hydraulic tanks of blue color without flow and drain fittings. They are used in household, individual, fire protection systems water supply or underfloor radiant heating. Available in nominal volumes of 8–5,000 liters and designed for pressures of 10, 16 or 25 bar. Models larger than 50 liters have a replaceable membrane. They are offered in the price range from 3,940 rubles (DE 8/10) to 201,440 rubles (DE 1000/10).

Refix HW includes blue horizontal tanks with volumes from 25 to 100 l. They are used in individual water supply mechanisms as buffer tanks. Withstands pressure up to 10 bar. Equipped with feet and mounting hooks to accommodate the auxiliary pump. Prices for products in this series range from 2,380 to 9,060 rubles.

Customers' opinions

“I installed Reflex NG 18 on the return pipeline heating system in front of the circulation pump. I took it with a small reserve. There were doubts about the non-replaceable membrane, but it has been working without problems for about 3 years.”

Dmitry, Moscow.

“The water supply system in the cottage is set up as follows: a well pump supplies water to storage tank Reflex 300 l with relay. Next to the coarse filter and home. The relay is set to oscillate from 2 to 4 atm. The tank volume is completely enough for all needs. It has been functioning without repair for more than 3.5 years; a specialist performs a preventive inspection only once a year.”

Vasily, Nizhny Novgorod.

“There was a need to change the heating in the house, the system is about 180 liters. Installed a circulation pump and a membrane tank. I wanted one with a replaceable diaphragm, but I couldn’t find one for the required volume. I decided to trust German quality and purchased Reflex N 18 white. Only worked 2 so far heating season, no complaints."

Timur Kireev, Chelyabinsk.

“For an autonomous water supply system, we bought a pump with a capacity of 3.5 m3/h and an expansion tank model Reflex DE 100 about a year ago. We chose it for its removable membrane with antibacterial properties. It’s completely enough for our family (4 people), although we like to splash around in the shower. The equipment is functioning properly, everyone is happy.”

Kirill, Volgograd.

“The length of the wiring around the house is about 40 m of 2-inch pipe, 50 sections cast iron radiators. Installed closed tank German Reflex 18 l. The system works like clockwork, without failures.”

Mark, Yekaterinburg.

Benefits Overview

Some users consider the non-removable shell to be a disadvantage of certain models, although numerous positive reviews of tanks produced by Reflex indicate the significant wear resistance and durability of this part. Other benefits include:

  • high strength, reliability and long service life;
  • significant hydraulic stability;
  • no need for additional power supply;
  • ease of installation and operation;
  • Possibility of use in systems with different coolants;
  • variety of container sizes;
  • wide areas of application - heating, water supply, etc.;
  • availability of equipment with a removable membrane;
  • use in solar collector systems is permissible;
  • equipped with an alarm that is triggered when the casing ruptures on Refix DT5 and DE models, with a volume of 60 l or more;
  • presence of pressure gauges;
  • high quality at an affordable price.


Reflex expansion tanks are designed to accumulate and store the necessary water reserves, maintain the required pressure in the circuit and protect against water hammer. The tanks of this brand are made from environmentally friendly pure materials and are equipped with an elastic, heat-resistant membrane, which allows the containers to also be used for hot water.

Features and types of water supply tanks from Reflex

Modern models of heating and water supply tanks from Reflex are made from food-grade steel and coated with a polymer layer that protects the material from corrosion. The containers are available for sale in white and red.

For many tank models, the nitrogen chamber is factory filled with gas to a pressure of 1.5 bar. Depending on the configuration, the tank can be equipped with a non-replaceable membrane or a replaceable shell. The containers on sale differ in nominal volume, shape, size and operating pressure ranges - from 3 to 10 bar. Many tanks from the range are capable of storing liquids at temperatures up to 120 °C. Small expansion tanks Reflex, for example, model NG8, can be mounted on a wall in a vertical position. Larger tanks must be installed on the ground using special supports.

All Reflex tanks on the market can be classified as follows:

  • Expanzomats of configuration N have a volume of 200 liters or more. up to 1000 l. These tanks are equipped with a non-replaceable membrane and operate at a pressure not exceeding 6 bar. Containers of this type are distinguished by their durability and long service life;
  • G configuration tanks – these Reflex membrane tanks are equipped with a replaceable membrane. These tanks are available for sale in a wide range of capacities - from 100 to 1000 liters. If desired, the buyer can purchase a tank with a capacity of 5 thousand liters. by reservation. These tanks can be equipped with a flanged or threaded connection and are only available in red;
  • Reflex N series membrane tanks are manufactured specifically for structures with a solar collector. On sale you can find containers with a volume of 2–600 liters. These tanks are equipped with a permanent membrane and have a threaded connection;
  • Tanks from the S range are capable of operating at a pressure of 10 bar. Models with a capacity of 2–500 liters are available for sale. These tanks are equipped with a permanent membrane and have a threaded connection;
  • Reflex hydraulic accumulators are produced with the DD marking. These devices are developed and manufactured specifically for use in conjunction with heating mechanisms. The buyer can choose a Reflex hydraulic accumulator in white or green. Models have a volume of 8–33 liters. The maximum permissible pressure for operation of the devices is 10 bar.


The advantage of Reflex products is a wide selection of containers. Each buyer can choose a large tank for household use, with a volume of more than 800 liters, or a small tank for household services, with a volume of less than 50 liters.

Reflex NG 25 – description and areas of application

This pressure tank is equipped with a permanent membrane and is used to compensate the coolant when the temperature of the liquid changes in refrigeration and heating systems.

The main characteristics of the tank include:

  • Volume – 25 l;
  • Maximum operating pressure – 3 bar;
  • Diameter – 30.8 cm;
  • Height – 48 cm;
  • Weight – 4.6 kg.

Due to the mobility of the membrane and the tightness of the tank, the gas pressure in one chamber and water in the second is constantly at the same level. This allows you to protect the tank from depressurization.

Reflex NG 35 – model characteristics

This expansion pressure tank is used in closed systems cooling and heating. The tank is made from high-quality materials and is covered with a layer of protective polymer composition. The Reflex membrane expansion tank has the following characteristics:

  • Volume – 35 l;
  • Maximum operating pressure – 1.5 bar;
  • Maximum temperature of working fluid – 120 °C;
  • Diameter – 37.6 cm;
  • Height – 46.5 cm;
  • Weight – 5.4 kg.

The internal cavity of the tank is divided into two chambers by means of a membrane. The first chamber is filled with gas, and the working fluid enters the second.

Reflex NG 50 – tank description

This model is manufactured using high-quality materials and is coated with a layer of high-quality polymer composition. Among the characteristics of the model it is necessary to highlight:

  • Volume – 50 l;
  • Index maximum pressure– 3 bar;
  • The maximum permissible liquid temperature is 120 °C;
  • Diameter – 44.1 cm;
  • Height – 49.5 cm;
  • Weight – 12.5 kg.

The tank is divided by a membrane into two chambers. The first of them is intended for filling gas, and the second is for storing water.

Reflex DE 80 - hydraulic accumulator characteristics

This popular model is successfully used in buffer and damper tanks in booster systems, as well as for water heaters. The main characteristics of the model include:

  • Capacity – 80 l;
  • The maximum permissible pressure is 10 bar;
  • Weight – 16 kg;
  • Height – 73 cm;
  • Diameter – 48 cm.

This hydraulic accumulator is divided into 2 chambers by means of a membrane. The tank is completely sealed, has a long service life and reliability.

Reflex DE 100 and DE 200 – model description

These tanks are suitable for 100 and 200 liters. used for fire extinguishing, water supply, high-pressure structures and storage of excess water. The membrane for the accumulator is pear-shaped. The main characteristics of the tanks include:

The manufacturer provides a 2-year warranty on these models. Most parts of the tanks are made of butyl and covered with a protective polymer layer.

Reflex DE 300 – design and characteristics

This model is equipped with a non-removable membrane that divides the tank into two chambers. The first of them is designed to be filled with gas, and water is stored inside the second. Among the characteristics it is worth highlighting:

  • Volume – 300 l;
  • Maximum pressure – 10 bar;
  • Maximum liquid temperature – 70 °C;
  • Weight – 53 kg;
  • Diameter – 63.4 cm;
  • Height – 1.27 m.

This model is successfully used for fire extinguishing, water storage and coolant compensation in heating systems.

To properly organize the heating of a private home, an expansion tank is needed. It accepts the excess volume of coolant formed during heating and returns the cooled liquid back into the system. A membrane tank (also known as an expanzomat) from the German company Reflex is popular among homeowners. Before you buy equipment, you should find out how it works, study its advantages and disadvantages, calculate the volume, and familiarize yourself with the installation rules.

The purpose of using a Reflex expansion tank is to prevent leaks and pipe ruptures due to an increase in water pressure when it is heated. The equipment is used in autonomous systems heating, ensuring their hydraulic stability and increasing the service life of all components.

Tank design features

The membrane expansion tank is a hermetically sealed container. Using an elastic rubber membrane, the internal space is divided into two cavities: the first is intended for coolant, the second is filled with nitrogen under pressure. In addition to the main components, it includes the following elements:

1. nipple for filling the upper chamber with air and releasing pressure;

2. fitting for bleeding air;

3. fitting for connecting the heating system pipeline;

4. connecting flange;

5. supports – for large-sized models:

6. pneumomanometer – in models with a replaceable membrane;

7. Level control sensor.

The expansion tank works as follows. When the heating is turned on, the coolant heats up from 20 to 90°C and expands (by about 0.4%), rushing into the lower chamber of the container. Water presses on the membrane, and it, in turn, compresses the gas in the upper chamber. As the temperature decreases, the reverse process occurs: the coolant contracts, the gas presses on the membrane, and it pushes water out of the liquid chamber into the system. The membrane tank receives water not only during gradual heating, but also during sudden pressure surges and unscheduled shutdown of boiler equipment.

Reflex expansion tanks are made from steel sheet and coated with anti-corrosion polymer material. The membrane can be replaceable or non-replaceable. Models have different shapes, dimensions, volume. The operating pressure ranges differ - from 3 to 10 bar. The maximum coolant temperature is up to 120°C.

Installation nuances

According to the method of placement, Reflex are divided into two types: wall-mounted and stationary (on supports). These features must be taken into account when choosing a room for the tank. The installation and connection of the expansion chamber can be entrusted to a specialist plumber or carried out independently if you have practical skills in such work.

When installing an expansion tank, a number of requirements must be met.

1. The room intended for installation must have a positive temperature.

2. The equipment is placed so that it is not difficult to approach it for periodic inspection and preventive maintenance. Free access to air valve for pressure regulation, connecting fittings and pressure gauge.

3. No structures should rest on the tank so as not to create unnecessary static load.

4. Reflex with a capacity of 8 to 25 liters is mounted on the wall; the mounting kit is purchased separately.

5. Additionally, it is worth buying shut-off valves that are protected from accidental closing and equipped with a drain tap - they are needed for maintenance.

6. Connection to the system is made from the suction side circulation pump in the boiler return pipe.

7. The make-up circuit is connected to the circulation line and not to the expansion line.

Volume calculation

The working capacity of the expansion tank depends on several parameters: the total volume of the system, the composition of the coolant, efficiency membrane tank. The calculation formula looks like this:

V = (VL x E): D, where:

  • VL – the sum of the volumes of all elements (boiler heat exchanger, radiators, pipelines);
  • E – coefficient of expansion of the coolant, depends on its temperature and composition;
  • D – tank efficiency.

Now let’s learn more about how to find the quantities included in the formula.

1. Calculating the total volume of the heating system is quite complicated. The volume of the heat exchanger is found in the boiler passport. If there are no instructions, take into account: a solid fuel boiler holds from 10 to 25 liters of water, a parapet gas boiler - from 3 to 7 liters.

The volume of water in pipes depends on their diameter and length. Using the reference book, find the internal volume (in liters) linear meter the required pipe, multiply the displacement by the length of the section, and the products are summed up. The working volume of radiators can be found in the instructions or from the manufacturer. On average, the specific volume of a convector is 7.0 l/kW, a radiator is 10.5 l/kW, a warm floor is 17 l/kW. To speed up the calculation, the total volume is found using a simplified formula: multiply the power of the heating system in kilowatts by 15 liters.

2. The expansion coefficient of the coolant E depends on the temperature and ethylene glycol content. For water without impurities at +95°C this figure is 0.036 (about 4%). If in working fluid 10% ethylene glycol added, E = (10-4)*1.1 = 4.4%. Expansion coefficient for a 20% solution: (20-4)*1.2 = 4.8% and so on.

3. The efficiency of the expansion tank for heating Reflex is a relative indicator determined by the formula: D = (P v – P s): (P v +1). Here P v is the maximum operating pressure at which the safety valve(for cottages take P v = 2.5 bar). P s – charging pressure of the membrane tank, proportional to the static pressure in the system as 1:10. If the heating height in a 2-storey house is 5 m, the charging pressure should be 0.5 bar.

As an example, the calculation of the minimum volume for a 45 kW system with a height of 5 m is given. A 20% aqueous solution of ethylene glycol is used as a coolant.

  • VL = 45*15 = 675 l;
  • E = 0.048;
  • P v = 2.5 bar; PS = 0.5 bar;
  • D = (2.5 - 0.5):(2.5+1) = 0.57.

The volume is equal to V = 675 * 0.048: 0.57 = 56.84. You need to purchase the Reflex DE 60 model with a volume of 60 liters.

Advantages and disadvantages

Products from the German manufacturer have many positive reviews, indicating high strength housing, membrane wear resistance, reliable operation equipment. Other advantages of Reflex should be listed:

  • no electrical connection required;
  • ease of installation;
  • it is used regardless of what coolant the heating works with;
  • wide the lineup;
  • possibility of connection to water supply;
  • you can choose a model compatible with solar collector heating systems;
  • oxygen does not enter the pipes with the coolant (due to the fact that the chamber is insulated), therefore the likelihood of corrosion is reduced;
  • no need to add water to the system;
  • no need for thermal insulation.

Despite a lot of advantages, a two-chamber expansion tank also has disadvantages. They are associated with certain difficulties in servicing the equipment.

1. If the heating operates according to closed principle, you need to constantly monitor the pressure and systematically pump up air.

2. A valve must be installed in the upper part to remove air, which sometimes still enters the system.

Sometimes one of the disadvantages is the non-replaceable shell, although it is designed for a long service life and rarely fails.

Price

The price depends on several factors: volume, availability of additional accessories, ability to include the expander in solar heating. The cost of models of the latest type (marked S) is the highest. Inexpensive expansion machines with a capacity of 8-140 liters are marked with the letters NG. The G series includes expansion tanks with a volume of 200-1000 l with a replaceable membrane. The cost of equipment is shown in the table.

Reflex expansion membrane brands are modern high-tech containers. These devices protect engineering systems with pumps and shut-off valves from sudden pressure surges. The devices successfully compensate for the thermal expansion of liquids used in systems.

Specifications

Modern containers used as expanders have similar qualities.

Reflex tanks have the following general characteristics:

  • The membrane tank is made only from high-quality base.
  • The product is necessarily coated with polymer compounds that serve as protection against corrosion.
  • Tanks are available in various colors.
  • The membrane is the shell of a container that cannot be replaced.
  • A hydraulic accumulator with a heating membrane provides a compartment filled with gas, which is replenished in production to a pressure of 1.5 bar.
  • The instructions for use of the tanks indicate that they can be used for maximum temperatures up to 120 degrees.

The only distinguishing characteristic of Reflex tanks in this line is the nominal volume and shape. Possible options– from 3 to 10 bar. The tanks can be mounted either on the wall or on supports mounted for the tank.

Tanks are produced various series, each of which has its own indicative qualities.

For example, Reflex DE 100 containers have:

  • volumes – up to 100 liters;
  • weight – 27 kg;
  • dimensions: 48 cm diameter, 83 cm height.
  • throughput pressure – 10 bar;
  • highest operating temperature – 70 degrees;
  • lowest operating temperature – 10 degrees;
  • nitrogen pressure in gas chamber– 4 bars.

Additional features include:

  • membrane breakthrough device;
  • threaded connection;
  • epoxy outer coating.

Tank installation requirements vary and are usually related to quality characteristics systems. The containers have different purposes. This is usually indicated in the accompanying documents.

Purpose

Reflex hydraulic accumulators can be used as:

  • protection of the utility network from impacts caused by hydraulic influence;
  • water container, which is necessary in case of temporary lack of water supply;
  • expansion tank suitable for hot water supply systems;
  • a reliable part that improves the performance of plumbing or heating equipment.

Most often, containers are used in private homes as expansion tanks for water heating. Tanks are also used in industrial plants.

For the manufacture of containers, high-quality materials with polymer coatings are used. Standard containers are divided into two parts. Low-inert gas, nitrogen, is pumped into one of them during production. Water can be pumped into the second chamber.

The gas compartment is separated from the liquid chamber by a rubber membrane. The pressure pressure is regulated using a pneumatic valve. It helps to release the excess volume that appears in the water chamber when the liquid is heated. Water can be pumped into the container.

When a certain threshold is reached, a relay is activated, which turns off the pump. When water is drawn from the container, the pressure drops, and the device automatically activates the pump. Hydraulic tanks have varying efficiencies, which are often related to their volumes.

Advantages and disadvantages

Reflex is a German manufacturer whose products have a lot of positive reviews. They indicate the reliability of the equipment. Users note the strength of the base and the wear resistance of the membrane.

The hydraulic tank has other positive qualities:

  • It does not need to be connected to electricity.
  • Installation is simple.
  • Application is possible regardless of the type of coolant.
  • The assortment is presented in a rich variety.
  • It is possible to connect to central system water supply
  • Let us choose among solar-collector type options that are connected to heating systems.
  • Oxygen cannot enter the pipelines containing the coolant.
  • There is no need to control the amount of water in the system.
  • There is no need for thermal insulation.

Despite the numerous benefits, users note some significant shortcomings hydraulic tanks For example, sometimes difficulties arise during maintenance. In heating circulation systems there is a need to constantly monitor pressure, and it is necessary to systematically pump up the pressure. Top part needs to be retrofitted with a valve that will help remove excess air. This air may still end up in the system.

Users often consider the irreplaceable internal membrane to be a minus. But the manufacturer claims that the shell can last a long time and very rarely loses its properties. functional features ahead of time.

Also, many consider the high cost of products to be a disadvantage. However, it is worth noting here that the cost of the models is associated with the presence of additional components. At the same time, the most expensive models belong to the latest generation of the S series.

Tanks of 8-140 liters, which are marked NG, will cost users less. By the way, the G series includes expansion tanks with a membrane that can be changed. N series models are the cheapest in cost.

Range overview

DD series membrane tanks- These are structures called hydraulic accumulators. The use of structures is possible in individual water supply systems in combination with heating elements. The volume of containers varies from 8 to 33 liters. Models come in white or green.

This model range includes subseries DT 5, DE, HW volume up to 500 l. These membrane structures are intended for systems with high water consumption. They are used in household, personal or fire protection systems.

Pneumatic containers DE for aquatic media they are usually blue. The presence of flow or drain additional devices is not provided. As a rule, models are used in household or individual water supply systems, as well as fire protection systems. The pressure calculated at production is up to 25 bar. Models with a volume of 50 liters or more are equipped with a replaceable membrane.

HW Tanks are also blue, usually horizontal type, volume from 25 to 100 liters. They are used for individual water supply systems as a container for storing water. The pressure in the container is 10 bar. The model provides the possibility of installing auxiliary pumping equipment. Special legs and hooks are available as additional equipment.

Smaller volumes differ C series tanks– up to 80 liters. Models are made from quality material called butyl rubber. Installation is possible on the wall using a special loop. The design shape is improved, flat, cylindrical.

F series tanks differ in even smaller volumes - from 8 to 24 liters. The containers, as a rule, are round or cylindrical in shape and are equipped with hooks for installation. Some variations have additional options, but the price depends on their availability.

S Series Tank Options can be used for both water supply and heating. Containers range from 2 to 600 liters. The equipment includes a threaded connection and a membrane shell that cannot be replaced. The containers can be used for systems with antifreeze with a concentration of no more than 50%.

G series containers- These are quite diverse models, holding from 100 to 1000 liters. Special versions of containers up to 5000 liters are possible. Pneumomanometers, threaded or flange connections are available as equipment. The containers have a replaceable membrane. They usually come in red.

N series variants There are volumes from 200 to 1000 liters. The tanks are equipped with a non-removable membrane, which is considered the most wear-resistant. Practice shows that the service life of such tanks is the best.

NG series variants 35 have a capacity from 8 to 140 liters with a nitrogen chamber of about 6 bar and equipment in the form threaded connection. Containers in this series may have various additions, which will determine the final cost of the products.

Calculations of container volume are associated with several parameters:

  • total volume of the system;
  • coolant composition;
  • membrane capacity efficiency.

The correct calculation formula will look like this: V= (VL*E) |D, where:

  • VL – total capacity of all components of the system (pipeline, radiators, boiler);
  • E is the expansion coefficient of the liquid, which is related to its temperature and quality;
  • D is the efficiency of the membrane capacity.

You can also take into account the following indicators:

  • If the boiler runs on solid fuel, then its volume can range from 10 to 25 liters.
  • If the boiler is parapet or runs on gas, then its possible capacity is from 3 to 7 liters.