Expansion tank for water supply how to pump. Expansion tank for cold water: benefits of use. A few words regarding how to install expansion

Membrane expansion tanks found applied as pressure compensators in the plumbing.

Currently, heat supply, where water moves under the action of gravity, is replaced by communications with the forced movement of the coolant.

A compensating device will be required when installing autonomous water supply or with hot water wiring.

A large number of models complicates the choice, which is done on the basis of knowledge of the principles of work, technical characteristics Devices and communications.

Design features

Despite the small design differences in the models used in water supply and heating, devices are functioning according to one physical principle.

IN general, Tank design It consists of a sealed steel case and a rubber membrane.

"Pears" are divided into two types:

• a diaphragm that shares the capacitance in half;
• rubber tank fixed on the inlet nozzle.

IMPORTANT!
Models of the first type do not have the ability to replace the membrane. During malfunctions, change the device.

Replacing the "pears" is easy. To do this, it is necessary to unwind the flange of the inlet (about the device for fixing plumbing reinforcement and pipelines it is written).

In the heating system, models are used in which the coolant is in contact with the metal case.

Devices for water supply Isolate water from steel walls. Such models are recommended as small.

Contact of fluid with a metal metal is a difference in two types of tanks.

When decreasing temperature Or reducing water pressure in the "pear" air pushes the liquid into the pipeline.

Right choice

Having come to the store, remember that the expanders are divided into use in heating or water supply.

Often, distinguish between the models externally, It is impossible, the device even color in one color, as a rule, in red.

Differences in the properties of the membrane can lead to accidents if you set a model that is not suitable in characteristics.

Pay attention to the characteristics The instrument that is listed on the nameplate.

The plate contains data on the characteristics of the device.

If it is indicated that the pressure is 10 bar, the temperature is +70 degrees, then the model is intended cold Water Pipelines.

The inscription on the plate: temperature +120 degrees, 3 bar - such a device is subject to heating.

The next thing to pay attention is the volume of steel tank, which is determined as follows:

IMPORTANT! For a boiler, an extender used in cold water supply is installed.

Installation of the device

The correct installation of the expander will affect the operation of communications and the service time of the device itself.

First of all, fix the tank on the wall or floor in the position indicated in the manufacturer's instructions.

The next step is to install the shut-off reinforcement at the point of attachment of the tank to the highway (it may take).

This will help maintain, repair or replace the membrane tank.

The water from the expander merges through a special fitting, which is installed in the interval between the container and reinforcement.

It will make it possible to drain the liquid before the start of dismantling the device (the price of a cut-in for cutting pipe thread indicated).

For heating systems

If the manufacturer does not specify an expander orientation, the device is fixed with the inlet down.

A vertical position allows you to continue working with membrane damage. The air, located on top, will continue to put pressure on the liquid without falling into the pipeline.

Tank installation is possible, both on the straight branch and on the return. This applies to heating based on gas or liquid boilers.

In systems with hard fuel boilers The extender is installed on the return. The setting is carried out using a spool located on top.

After mounting the membrane tank, the system is filled with a coolant, periodically blending air.

It is necessary to measure the water pressure at the outlet of the boiler and compare with pressure in the expansion.

Tank parameters must be 0.2-0.3 bar belowthan in the pipeline.

At large and smaller values, the air is pumped or bleed through the spool.

For water pipes

Oriented indoors, depending on the convenience of location.

The direction of the nozzle down Values \u200b\u200bhave no.

Before the drive, the drain device and shock fittings are installed in the form of ball crane ().

Expander for cold water Configured otherwise than for heating.

The pressure in the system is created by the pumpfor which I install the inclusion and shutdown threshold (process of pressure switch pumping station It is written with your own hands).

Based on the characteristics of the pump, a pressure of 0.2 bar is installed in the tank below than the threshold of pumping equipment.

This will avoid the likelihood of the hydrowarder..

When installing a tank on line hot water Set pressure by 0.2 bar higher than the upper station of the station. Such a value will allow water not to be in the pipes.

Finally

Simple at first glance, the design will require knowledge, experience and accuracy during installation. The expander performs a significant role in the autonomous, closed type pipelines.

The service life of the tank and communications as a whole depends on the quality of the installation.

It is worth remembering that the competent approach is needed when installing any element of the water supply or heating.

What do you need a membrane tank in the system autonomous water supply Private house, learn while watching a video.

Membrane expansion tanks found use in heating, water supply, air conditioning systems, refrigerators To compensate for the change in the volume of the coolant derived from its heating or cooling, as well as to prevent the destruction of the system from hydraulic impact. hydraulic pressure, gradually leading to the failure of the system, determine the need to buy a membrane expansion tank.

Expansion tank membrane type

The company "Terem" offers a wide the lineup Membrane-type expansion tanks for heating and water supply (hydroaccumulators) production Unigb, CIMM, REFLEX.

The line of vertical membrane tanks Reflex (Germany) is represented by outdoor and wall models volume from 2 to 1000 liters, with two types of membranes - replaceable and unmanable. Expansion membrane tanks Reflex are designed for closed heating systems, cooling systems and systems with sollar collector. Reflex tanks are distinguished by a solid design and do not need additional energy when working. Have a high-quality coating and depending on the model are offered red and blue flowers. The products of the Italian brand CIMM are also represented by models with outdoor and wall-mounted installation options from 6 to 1000 liters.

Membrane expansion tanks and hydroaccumulators Varem. russian production Produced by volume from 5 to 2000 liters. Varem membrane tanks can be used both in everyday life and in the industrial area.

Wall versions with the possibility of horizontal and vertical installation Allow the membrane water tank to buy even for very limited spaces. Small-size membrane type expansion tanks allow you to save useful Square. The membrane tank price and other characteristics of models are presented in product description.

Buy expansion tank in "Terem"

Online store engineering equipment Teremonline offers to acquire expansion tanks of a membrane type of various purposes in the outdoor and wall variants execution. Expansion tanks and CIMM, Reflex, Varem hydroaccumulators are designed primarily for use in domestic purposes. Models are represented by a large selection of sizes. On the expansion tank membrane price in the online store TEREMONLINE from 748 rubles.

Autonomous water supply, independently feeding water to the parsing points as in an urban apartment, has long ceased to be a wonder. This is the norm country LifeThat just need to competently design, collect and equip the equipment capable of running and stop the system as cranes.

The stable operation of an independent network will provide an expansion tank for water supply. It will protect against hydrowards, significantly extend the working resource of pumping equipment, guarantees regular filling of the water system, will relieve it from the need to carry it with buckets.

We are pleased to introduce you to the features of the device and the principle of operation of the hydroaccumulator. We scrupulously described the rules for selecting the membrane tank, the installation and connection specifics. The information proposed for consideration we supplemented useful illustrations, schemes and videos.

Features of the device and design

Different models of expansion tanks may have restrictions on the method of use - some are designed only to work with technical waterother can be used for drinking water.

By design, hydroaccumulators distinguish:

• reservoirs with replaceable pear;
• capacities with a fixed membrane;
• hydrocking without membrane.

On the one hand, the reservoir with a removable membrane (at the tank with lower connection - Below) There is a special flange with a carvings to which the pear is attached. FROM back side There is nipple, for pumping or booming air, gas. It is designed to connect to the usual auto pump.

In a replaceable pear tank, water is pumped into the membrane, not in contact with metal surface. The replacement of the membrane occurs by unscrewing the flange, which hold the bolts. In large tanks, to stabilize filling, back wall The membranes are additionally attached to nippel.

The service life of the removable pear depends on the air pressure settings in the gas compartment of the hydroaccumulator. Sometimes, to create a greater supply of water, the user reduces the amount of air and increases the amount of water in the pear. This leads to a touch of a membrane to the wall of the tank, and becomes the cause of rapid abrasion

The inner space of the tank with a fixed membrane is divided into two compartments. In one there is gas (air), water comes into another. The inner surface of such a reservoir is covered with moisture resistant paint.

Most often, tanks with a fixed membrane are used for heating systems. Since the membrane is an element that fails much faster, the service life of such a tank is smaller than the devices with a removable pear

There are also hydrobars without a membrane. They are not divided into pieces of water and air. The principle of their action is also based on mutual pressure of water and air, but with such an open interaction, two substances are mixed.

The advantage of such devices is the lack of a membrane or pear, which is a weak link in familiar hydroaccumulators.

Externally, expansion tanks can only be divided into horizontal and vertical models, but their operating parameters can be very different

Diffusion of water and air makes serving tanks quite often. About one time for the season, you have to pump air, which is gradually mixed with water. Significant reduction in air volume, even at normal pressure in the tank, cause frequent inclusion of the pump.

Hydraulic batteries in water supply systems reduce the likelihood of hydrowards, prevent pumps from unnecessary inclusions, allow you to form a stock of water and maintain pressure in the circuit

Principle of operation of the hydroaccumulator

Calculation of the total water supply for water supply closed type Calculate on such a formula:

Vt \u003d k * amax * ((1 + pmax) * (1 + PMIN)) / (PMAX-PMIN) * (1 + pods),

• VT - full hydraulic volume;
• AMAX is the maximum possible consumption of water per minute, liter;
• To - coefficient (see Table), depending on the power of the pump;
• P MAX - Relay settings when hardening equipment, bar;
• P min - relay settings when running equipment, bar;
• P HOD. - pressure in the hydraulic panel (in its gas cavity), bar.

The coefficient K can be determined by the following table:

Some manufacturers also consider the volume of the hydraulication other than:

Dzhelex's company engaged in the production of an extensive line of equipment for water supply and heating systems, offers another formula for express definitions of hydrobacing volume

Horizontal and vertical orientation

The choice between the vertical and horizontal tank is the features of the room. If the room is small or the volume of the container is impressive, then not to occupy a lot of space, install vertical containers.

The horizontal tank has a smaller capacity, can be suspended on the wall, as well as serve as a support for installing the surface pump. For its installation there are special attachments. Large tanks are made only in vertical design and are installed on the legs.

Summing up all of the above, it can be noted that the choice of the hydroaccumulator has to be performed between such distinctive properties:

• operating pressure;
• producing country;
• larger or less;
• replaceable or no rubber membrane;
• membrane for technical or drinking water;
• case material - stainless or enameled steel.

So that there are no difficulties in the future with the replacement of components, it is better to choose the most running models of devices. Rubber pears to them always have in a free sale, if you need urgent replacementDo not have long to expect delivery.

Gallery of images

Schemes for connecting hydrabs

For the hot water supply system, they are carried out on the section of the circulating highway, the suction line of the pump, closer to the water heater.

The tank is equipped:

• pressure gauge, safety valve, aircraft - a group of safety;
• a lock valve with a device that prevents accidental overlap.

In a plumbing system where water heating equipment is present, the device assumes the execution of the expansion tank functions.

Installation scheme in the GW system: 1 - hydrobacom; 2 - safety valve; 3 – pump equipment; 4 - filtering element; five - check valve; 6 - shut-up crane

In the system, the main rule is the installation at the beginning of the strapping, closer to the pump.

In the connection scheme necessarily present:

• reverse and shut-off valve;
• security group.

Connection schemes can be very different. The connected hydraulicular normalizes the operation of the equipment, reducing the number of pump inclusions per unit of time and this is prolonged by its service life.

Mounting scheme in the electron system with a borehole: 1 - tank; 2 - check valve; 3 - Crane shut-off; 4 - relays for pressure adjustment; 5 - pumping equipment management device; 6 - security group

The listed steps were required for the device of the hydroaccumulator strapping, which was produced on the day surface. For further actions, you need to move to the caisson.

Gallery of images

The hydroaccumulator along with the strapping connected to it is immersed in concrete caisson. If the hydraulico is located on the surface, in this stage there is no need

To connect the electrical part, remove the cover from the pressure switch housing, using a flat screwdriver

After carrying out finish assembly The systems remain controlling tests and run the water supply circuit.

Features of adjustment of the hydroaccumulator

Expansion tanks for water supply are available on sale with standard manufacturer settings - often the pressure in the air compartment has already been installed at a value of 1.5 bar. The allowable pressure is always indicated on the label and the manufacturer does not recommend deviating from the specified parameters, especially in the direction of its increase.

Before proceeding with the adjustment, the system is disconnected from the mains and closes the lock valves. The membrane tank is completely empty, dragging the water - the exact pressure indicator can be measured only when the water compartment is empty.

Next, the pressure indicators are removed using an accurate pressure gauge. To do this, from the spool remove the decorative cap and bring the device. If the pressure differs from the required, then it is in accordance with it, pumped up or blending excess air.

Considering the fact that the manufacturer against deviations from the recommended pressure indicators is necessary at the design stage to choose the appropriate equipment whose parameters will not conflict among themselves

When adjusting the pressure in the gas compartment of the tank, the manufacturer fills it with an inert gas, for example, drained by nitrogen. This prevents corrosion of the inner surface. Therefore, users are also recommended to use technical nitrogen to increase pressure.

Tank pressure setting in the water supply system

The pressure in the closed type tank is always set slightly below (by 10%) than the pressure level when the pump is started. Adjusting the pressure in the device can be adjusted water pressure. The smaller the gas pressure in the hydraulician (but not less than 1 bar), the more he will hold the water.

At the same time, it will become uneven - strong with a filled tank and increasingly weakened when it is empty. To ensure a strong and smooth flow of water, the pressure in the chamber with air or gas is within 1.5 bar.

The water pressure in the water supply is installed using the relay. When setting up pressure in the expansion chamber, these values \u200b\u200bmust be taken into account

Adjusting the hydraulic in the strapping of the water heater

Expansion tankwhich is used for hot water supply, initially should not contain water. The pressure in the device is installed on an indicator, which is 0.2 more than the upper threshold of the pump.

For example, if the relay is configured to turn off the equipment with 4 bar pressure indicators, the pressure in the gas compartment of the expansion tank should be installed at a value of 4.2 bar.

Installed in the strapping of the water heater, the tank does not serve to maintain pressure. It is designed to compensate the expansion when water is heated. If you set pressure in it to a smaller value, then water will be constantly in the tank.

Rules for service Hydrobacket

The planned inspection of the expansion tank is to test the pressure in the gas compartment. It is also necessary to inspect the valves, locking reinforcement, air vent, check the operation of the pressure gauge and the water pressure relay. To make sure the integrity of the tank is carried out an external inspection.

During preventive maintenance, pressure in the hydraulication should be measured and adjustable if necessary

Despite all the simplicity of the device, expansion tanks for water supply are still not eternal and can break. Characteristic causes are a break of the membrane or air loss through nipple. Signs of breakage can be determined by frequent response of the pump, the appearance of noise in the water supply system. Understanding the principle of operation of the hydroaccumulator is the first step towards the correct maintenance and troubleshooting.

Installation of open-type hydraulic

Device open type It is still used less often, as it requires the permanent user intervention in its work. An open expansion tank is a leakage container, which serves for the formation, water accumulation, and also serves as an expansion chamber.

Connect to Baku: Crane for drain, nozzles for the recycling and feed pipe, control and overflow pipe

The tank is installed above the upper plumbing point, for example, in the attic, the water in the system comes in gravity. Each meter to which the device rises, increases the pressure in the plumbing by 0.1 atmospheres.

To automate the process of providing water, the tank is equipped with a float switch and install an automatic relay that will turn on and disconnect the pump.

The container is mounted in a rapid room, covered with a lid from dust and debris, wrapped the walls mineral Vata. or other insulation

This method of water supply requires regular user control, otherwise water negative temperatures It can freeze (if the room does not heal). The liquid will evaporate, so you have to constantly add it.

In addition, such a container is cumbersome and not aesthetic, for it, it is necessary to have an attic room in the house. But the main disadvantage of the device is not adapted to work under high water pressure in the system.

Conclusions and useful video on the topic

Roller # 1. All about expansion tanks - classification, purpose, adjustment and symptoms:

Roller # 2. Improper operation of the pumping station is often associated with hydroaccumulator faults:

Roller # 3. Nuances of the choice of hydraulic equipment for water supply:

At the stage of planning and developing a plumbing system, it is necessary to consider everything in principle important moments And calculate all the parameters. If there is no confidence in the infallibility of your calculations and proper choice Hydrobook for water supply, it is better to refer to specialists.

Most firms implementing professional equipment provide advice or even carry out calculations for free. This will help to avoid mistakes and extra spending.

We are waiting for your comments with stories about your own experience in using the expansion tank, with questions that have emerged in the course of familiarization with the information provided. We are interested in your comments and probable suggestions. You can comment on the block below the block below.

Water supply tank (expansion tank) is a container used for autonomous heating and water supply. It prevents the occurrence of increased pressure and protects the system from hydraulic shocks. Expansion tanks are selected individually for each system, taking into account all parameters and characteristics. They should be resistant to increased pressure And not susceptible to corrosion.

The main task of expansion tanks for water supply maintaining optimal pressure in the system. For these purposes, tanks use compensators that align the load on all parts of the water supply system. The tank and the membrane in contact with water are made of materials that do not affect the taste of water. Such materials must be certified and responded by sanitary and hygienic requirements.

Water supply tank: action principle.

Inside the expansion tank there is a rubber membrane that dividing the tank into two parts. The air is pumped into one, the other part remains empty. Empty part of the tank after the launch of the water supply is filled with water. The part with the right air is designed to maintain a given pressure. Air pressure is extruded from the tank into pipelines, which creates a steady state of the system. Without drops and overloads.

Pact expansion for water supply: features of work.

Water falling from the well to the tank is under pressure, increases the membrane and reduces the amount of air, while creating some pressure. After reaching required level Pressure pump is turned off, water is consumed and pressure drops. To maintain pressure, the pump is again turned on.

In addition to other positive qualities, the membrane tank compensates for the hydraulic blow, thereby reducing the inclusion frequency of the pump. This increases the life of the elements of the system and saves electricity. In addition, when the electricity is disconnected, the water supply tank can play the role of instrument "Execution". Those. Water will come to the consumer for some time.

Expansion tanks are horizontal and vertical form, open and closed. Water volume, as well as working pressure, also vary.

The design of the hydroaccumulator is not too complicated: it consists of a hermetically closed container of oval shape. Tanks for water supply systems have two internal chambers: air and liquid. From similar heating, these aggregates are distinguished by the presence of a separation membrane, as well as the nature of the material of its manufacture.

In order not to harm high quality Drinking water, it is made from an eco-friendly rubber with excellent hygienic properties. As for the size of the tanks - they can be completely different, starting from 8 and ending with 100 liters.

Volume of water tank

When calculating the volume of the tank, the initial pressure of the air contained in the empty compartment of the tank and the working (at maximum load) is taken into account. The calculation of the necessary water pressure is the principal. Although for the consumer and it is enough to know the ratio of the volume of the tank to the volume of the entire system, the incorrectly chosen tank leads to a quick failure of the equipment and pipelines.

Open tank

Such devices are installed on the maximum elevated points of the heating system (attic, roof of buildings). The water pressure is compensated only by atmospheric pressure, because of which there is no possibility of adjustment and the danger of leakage occurs during fluid excess. Now the open-type tanks are used extremely rare.

To make the choice of equipment to be optimal, several rules should be adopted:

• It is necessary to take into account what kind of system the aggregates will be involved.
• Worth considering what temperature mode Planned.
• Pay attention to the technical parameters of the equipment that were specified by the manufacturer.
• If you plan to stop the choice on the membrane type of tank, then you need to keep in mind that the pump here has a limited number of inclusions. However, this remark is not relevant in the event that the water has to accumulate under the action of high pressure.
• If the surface type pump is used in the system, then a small hydroaccumulator in volume should be attached to it, since it has large quantity Connections for a minute than a submersible type pump.
• Membrane tanks for water supply systems with a horizontal installation method should be used only in a pair with surface pumps.
• It is worth considering the specific characteristics of the water supply system.

As a result, the purpose of the tank is reduced to several basic principles:

• The equipment helps to avoid hydrowards arising inside the complex.
• It is stabilized and maintained at the same level pressure inside the system.
• Due to the presence of tanks, the pump functions are optimized, since it will be protected from too frequent inclusions.
• Helps extend the service life of the pump.

Autonomous water supply system for modern house - This is not an innovation. Quality water supply devices are checked by users and time.

But buyers are better to familiarize themselves with the functionality of all devices autonomous System Water supply before buying and installing.

Views

In order to properly pump water for a long time, I need a membrane expansion tank.

For the convenience of the system and save space, three types of these devices are available:

• floor;
• mounted;
• flat.

Profession of a specialist: Choosing between the types of expansion tanks, remember that only the floor has a replacement membrane.

What exactly adds an expansion tank to the system:

Operating principle

The system grows fluid pressure. Then the cumulative tank is filled with a certain amount.

It gradually increases the water compartment, and the opposite compartment containing air decreases.

This process occurs until the equilibrium is obtained, in other words, right pressure in system. When the pressure drops below the air pressure level, the internal membrane is timely reduced.

Due to it, the water supply is normalized. The tank device functions as much as necessary to stabilize water and air pressure.

The right choice of the device

Selecting the model with the necessary features and volume, consider the fact that the frequency of the pump operation depends on the total volume of the tank.

The leading characteristic for any tank is not functional, but its volume.

At the same time, for each water supply system there are criteria that cannot be neglected, namely:

1. The number of permanent users with water. (Daily use).
2. The number of points for water intake. (Devices, cranes and other plumbing devices).
3. Approximate frequency of use by water intake points at the same time.
4. Cycle "Turning on - Shutdown". You need to know exactly the limit of this cycle in one hour from your pump.

Approximate calculation:

When calculating three permanent consumers, a tank is installed with a total volume of 20-24 liters. However, the pumping equipment should produce approximately 2 cubic meters per hour.

When calculating four permanent users with a margin, it is better to install equipment from 50 liters. The pump performance in this case is about 3.5-3.7 cubic meters per hour.

If consumers are more than 10 people, then the tank is needed at least 100 liters, and the pumping equipment with an indicator of more than 5 cubic meters per hour.

To avoid breakdown and cheap repair, you need to carefully familiarize yourself with the manufacturer.

In this choice, it is not necessary to chase at a cheaper and dubious brand. Incorrect savings may result in damage to breakdowns.

Models with a low retail price inside are taken, as a rule, without marriage. But the expenditure parts are always of the cheapest materials.

It is better to ask about the material from which the membrane is made. Its environmental friendliness and stability will improve comfort, as well as the service life of the system.

Perhaps you will also be interested in an article about.

Read the article on the fault and repair of the hydroaccumulator with your own hands.

What is different from the hydroaccumulator

Installation scheme of the membrane expansion tank rechargeable, membrane tanks and are the devices that are most in demand in modern device Water pipe and heating.

But it is better to know their essential differences, because the expansion tank creates an effect of smoothing pressure when the fluid is heated.

Speaking simple languageIf there is no necessary space for water, which gradually changes its volume, then any non-volatile container burst. For this, a device with a membrane is created, which normalizes the difference in the operating system.

Both appliances in appearance are very similar. But their device, destination and performance features different.

The hydroaccumulator is used to supply water for drinking.

Its main property is the supply of the desired water pressure.

The most important part in the tank and the hydroaccumulator is a membrane.

The material from which it is made is differ in water supply devices, including between the tank and the hydroaccumulator.

Also different locations of air and liquid cameras. The hydroaccumulator inside is equipped with a "pear" tank. It puts the pressure to it, it is between the walls of the tank and the water container.

For each of the above devices, the most an important parameter is the durability and reliability of the membrane. Her quality guarantees the stability of the entire system.

Watch a video in which a specialist explains how to choose a membrane expansion tank for water supply at home: