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In modern heating systems and water supply systems, special membrane-type expansion water tanks are installed as protection equipment. Often such membrane tanks are called pressure tanks, and sometimes even “hydropneumatic tanks” and “hydraulic accumulators”. In the water supply system they are called upon to perform three important functions.
The main function of membrane tanks is obvious - it is the reservation, or accumulation of water resources, as well as maintaining water pressure in the pipes. Pressure tank in in this case is a reserve tank that accumulates water reserves. When the tap is turned on and water collection begins, the pressure of water entering the system comes from precisely such a tank. When the water reserves in the “hydraulic accumulator” decrease and the pressure level inside the pipes drops below the permissible limit, the pump starts. Further, if the tap is turned off, the pump does not stop working, but continues to pump water into the membrane tank. Over time, the tank is completely filled, the upper limit of the pressure in it is reached, and the automation turns off the pump. It is logical that the use of a membrane tank increases the service life of not only the pump, but also the entire system as a whole. And all because in its absence and the high frequency of turning on/off the taps of the water system, the pump would have to constantly switch from one state to another.
The second important function of tanks is to prevent water hammer. Water hammer is a pressure surge in the system when the energy of movement of an abruptly stopped water flow in a pipeline turns into energy that destroys the walls of the pipeline. The likelihood of water hammer is high when the tap is suddenly closed. Such a shock is no less likely when turning off various household appliances. electrical appliances, such as, for example, washing machine. "Hydraulic accumulator". In this case, it does not allow sudden changes in pressure and plays the role of a muffler for such impacts.
Well, the third function is, of course, creating a supply of water in case of any incident: be it a temporary shutdown pumping station, or something similar. With a membrane tank, there will always be a spare container of water in the house.
It is necessary to distinguish between membrane tanks for water supply and heating systems, although outwardly they are very similar to each other. In most cases, they look like spherical metal vessels. Unlike a pressure tank, the main function of a membrane tank for a heating system is to reserve excess water resulting from its thermal expansion for subsequent return to the system. Like pressure tanks, they act as a damper for water hammer in the system. Both types of tanks have a special elastic membrane inside made of heat-resistant rubber. This membrane divides the vessel into two parts (for air and for liquid) and is capable of stretching, which allows the system to be in an equilibrium state under pressure changes. Our team will help you choose the right tank for the system.
Pressure tank (hydraulic accumulator) - auxiliary device in autonomous system hot and cold water supply. However, you should not skimp on installing it. It will protect the pumps from rapid wear, and in addition, will help get rid of a number of problems in the operation of the system.
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On the picture:
Hydraulic accumulator - important element closed water supply system of a country house.
Where is a hydraulic accumulator used?
How to choose the volume of a hydraulic accumulator? The volume of the pressure tank must be at least one quarter of the maximum total water consumption in the house per minute. In this case, it will be able to supply water simultaneously to all water points in the building for at least 15 seconds without turning on the pump. What can you accomplish during this time? For example, rinse your hands or wash a cup. However, let us recall that we're talking about about the maximum pressure of water flowing from all taps at once. If you open only half of them or reduce the intensity of the jet by half, the time interval will increase to 30 seconds. Thus, the water supply may well be enough to not only thoroughly wash your hands, but also wash the dishes without turning on the pump.
In the photo: Reflex membrane expansion tanks.
IN closed systems water supply Such systems contain booster circulation pumps and a hydraulic accumulator (also called a pressure tank), which will help avoid a number of problems associated with their use. First of all, it is needed to maintain normal pressure in the system when the pump is turned off. In addition, the hydraulic accumulator or pressure tank contains a certain supply of water.
IN open system Water supply does not require a pressure tank. Open system used in small country houses: it is based on a water tank installed on an elevated surface.
Device
The design of the hydraulic accumulator is not complicated. It consists of a sealed metal case, inside of which there is a rubber membrane. She reminds balloon, but only much more durable. The space between the housing walls and the membrane is usually filled with a safe inert gas. The tank is mounted on the pipeline and connected to it using a flange connection.
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On the picture:
Internal organization hydraulic accumulator (pressure tank).
Principle of operation
The elasticity of the membrane and gas resistance are used. Water entering the membrane of the pressure tank stretches it under the influence of pressure in the pipes. The gas in the space between the membrane and the housing is compressed and pushes water into the main line. Thus, the hydraulic accumulator maintains the required level of pressure in the water supply main.
Why do you need a hydraulic accumulator?
Volume and cost devices are tightly interconnected. The larger the tank capacity, the higher its price. In mid-2010, the picture was as follows: the smallest hydraulic accumulator with a volume of 5 liters cost from about 1500 rubles, a tank for 25 liters - about 3800 rubles, and for 100-500 liters - from 10 thousand rubles.
In the photo: Ultra Pro tanks from the Zilmet factory.
- Prevents the occurrence of excess pressure. The principle of operation of the hydraulic accumulator makes it possible to compensate for the thermal expansion of the liquid in the pipes, due to which the water pressure can sharply increase.
- Solves the problem of water hammer. It can occur when starting a pump or opening a shut-off valve. “Spitting” from a faucet is not the worst consequence of a water hammer: it can burst a pipe or damage plumbing equipment. Hydraulic accumulators for water supply or pressure tanks absorb such impacts, protecting all other parts of the system from them.
- Protects the pump from frequent short-term starts. Such starts occur with frequent switching on and off of water and quickly lead to wear and tear of the pump. Due to the fact that there is a certain amount of water under pressure in the accumulator, it enters the water supply when the tap is opened without the participation of a pump.
- Allows you to use water during a power outage. True, the water consumption will have to be significantly limited, otherwise it will quickly run out.
The article uses images from rusklimat.ru, reflex.de, zilmet.com
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Cold and hot water plays a big role in everyone's life modern man. It is difficult to imagine that a city resident could do without a hot shower or hot water for washing dishes. To ensure a constant supply of water to the taps of private houses for household use It is recommended to equip water supply systems. For this the best option will buy a membrane tank for water supply.
Where can the structure be used for water supply?
The tank in question, as well as the hydraulic accumulator, can be used not only to accumulate excess water during the heating process. Thanks to them, you can maintain pressure in the system, as well as protect and protect against potential damage. If you decide to buy a hydraulic tank and install it, you can immediately feel its benefits. Water is supplied right up to the end, it works in a well-functioning manner, and the moisture that has accumulated allows you to turn the pump on and off much less often. Consequently, such equipment wears out much less. Buying hydraulic accumulators will also be the right decision, as an addition to the hydraulic tank. Tanks can be used in systems where hot and cold water in houses, in those systems that are responsible for heating, for heated floors. In addition to domestic use, there are also larger tanks; they are often installed in cleaning systems, as well as where there are devices for extinguishing fires.
The main advantages of water supply tanks
Buying an expansion tank for water supply in Moscow will be the right decision, since it is convenient to install, it is simple in design, and easy to configure.
When water heats up, it does not come into contact with air, therefore it stays hot longer. Due to the tightness of the entire tank, hot water loses heat in minimal quantities. This also allows you to save on energy resources. It’s easy to buy hydraulic accumulators in Moscow, you just need to choose the right store for this. Choosing a tank to serve clean water for drinking, you need to clarify what material the inner membrane is made of. Water will come into contact with it. This is explained by direct contact. Installation and installation of the tank is convenient; you can always install it on the floor, hang it on the wall, or choose a flat option.
You can buy a hydraulic accumulator for water supply systems in a store. There is a wide range here that will allow you to choose what you need, and their cost plays an important role here. Hydraulic accumulators are very affordable in Moscow. If necessary, get advice from experienced managers who know the range both in theory and in practice. It is profitable to buy hydraulic accumulators for water supply in Moscow in a store where they provide the most profitable terms for every client who came here. The product itself High Quality, prices are reasonable, any questions can be asked by phone or simply leave a request on the resource. You will be contacted at as soon as possible and will help you make a choice if you are not yet sure.
