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Extrol 15

Choosing expansion tank

Initially, all considered to be divided tanks into two basic types:

The first type – devices designed to compensate for the excessive amount of fluid in the heating systems and thermal expansion of water. This expansion tanks

When heated, the boiler temperature of the liquid-coolant in it increases. When heated, the liquid expands. This leads to an increase in its volume by about 0,3% for every 10 ° C. Therefore, the increase in temperature to 70 ° C initial volume of fluid will increase by approximately 3%. The liquid is practically incompressible and if the heating system is not equipped with optional device that allows somewhere to go this volume, the inevitable happens and destruction. To avoid this, and apply expansion tanks.

The second type of tanks – a tank for water (hydraulic accumulators). This device, built to keep the pressure hydraulic system, ensures the continued readiness of the system to work under steady pressure. Accumulator prevents the need for the pump each time the system requires.

Thus the accumulator maintains the pressure in the system, providing additional volume of water in the system to the desired level. Also, expansion tank tanks can be used to prevent the destruction of the system from water hammer. This phenomenon occurs in the pipes when I get disconnected or switched the pump, the rapid opening or closing the valve. Pressures can be much faster than static and it can lead to the destruction of pipelines, threaded connections or plumbing devices. To avoid this, and given that the volume changes when pressure fluctuations are small, are invited to use expansion tanks of small capacity – 0.2 liters.

Also, tanks can be used as containers with liquid in fire fighting systems, fire fighting, and as a reserve tanks in cases where electricity is turned off. Externally hydroaccumulators very similar expansion tanks of heating systems. However, the appointment and service conditions have other, hence there are structural differences.

The main difference is the material of the expansion tank, and the peculiarities of the location of air and water chambers. As a material for expansion tank accumulators use food gums. To the material of the expansion tank expansion tanks usually do not set such high hygienic and sanitary requirements, so it is possible to use other materials, which will be discussed later.

Expansion tank

Expansion tank – a key element of the plumbing supply system. The accumulation of water – this is not its only advantage. Accumulator is also responsible for maintaining the necessary water pressure in the system and is on the way hammer. Together with hydraulic accumulators, pump life is increased significantly since accumulator affects the frequency of the Taco pump, the Taco 007 pump in working condition only when necessary.
An important advantage of using the accumulator is that he always carries a supply of water. A power loss does not preclude its use. If you want your pump has served as long as possible, choose a more extensive hydraulic accumulators. The more he will be, the less need to use the pump.
Horizontal type  pneumatic tanks recommended for use with surface pumps. Vertical hydraulic accumulators can be used with any pump.

Diaphragm expansion tanks (Extrol 15, 30, 60, 90) ‘Amtrol’ designed for use in systems of drinking and household water supply. Scope of application extends from the expansion tanks for water heaters to damping and buffer capacity in booster pump. Membrane expansion tanks ‘Amtrol’ work by a nitrogen blanket. Air and water chambers are separated by a membrane. All surfaces in contact with water, have a corrosion protection.

Diaphragm expansion tanks ‘Amtrol’ designed for use in systems of drinking and household water supply. Scope of application extends from the expansion tanks for water heaters to damping and buffer capacity in booster aggregate. Membrane  expansion tanks ‘Amtrol’ work by a nitrogen blanket. Air and water chambers are separated by a membrane. All surfaces in contact with water, have a corrosion protection.

Installing the pump to the control Amtrol “Extrol” – a new word in the use of plants to maintain pressure for heating and cooling. Three functions Amtrol “Extrol”: Supports the pressure in the system with very little fluctuation; Produces deaeration of water in the system carries out automatic recharge. This Amtrol “Extrol” represents the optimal solution of problems of increasing overtiring – especially in closed heating systems. Amtrol “Extrol” guarantees the absence of air in the system up to the upper floors, to the most distant points. Combining the functions of pressure maintenance, decontamination and recharge is a basic prerequisite for the system without air, without requiring costly maintenance.

Expansion tanks for heating systems and water supply can significantly increase the degree of comfort, which gives you the heating equipment. The price of such tanks is relatively small, and their installation does not require much time. But the operation of the tank will increase the available supply of hot water. Now you will forget about interruptions to water supply. Expansion tanks Amtrol Extrol – a huge choice of models of various size.

Expansion tanks are of two types

The expansion tank (Amtrol Extrol 30, Extrol 15, Extrol 60) is open – the capacity, the bottom of which is connected to a pipe heating system. The water level in it depends on the volume of fluid in the system. The more hot water, the greater its volume. Place the open expansion tank above the upper point of the heating system, usually in the attic at home, while tank thermal insulation to reduce heat loss through the walls.

Expansion tank closed type is a sealed metal tank – capsule spherical or oval shape, divided inside a sealed membrane of heat-resistant rubber on the two cameras – air and liquid. Bucky closed favorably with the tank open. First, in a closed expansion vessel is not the case of contact with air fluid: the liquid does not evaporate and is not oxidized by oxygen (and do not corrode the inner surface of PEX tubing and radiators). Secondly, from a closed expansion tank liquid never will result out and not ruin the finish of the walls and floor.

Selection of the diaphragm expansion tanks for heating systems

The volume of the expansion of the membrane tank Extrol 15 should be selected so that its capacity was not less thermal expansion of coolant.
Initial data in the calculation of the expansion of the membrane tank will be:
1) Volume of fluid (water) in the system, Vsist, pp. This value can be calculated depending on the power system.
2) Static height (static pressure). The height of the liquid column in the system, located above the tank. A one-meter column of fluid creates a pressure of 0.1 bar.
3) Pre-pressure expansion of the membrane tank, Ppredv – gas pressure in the gas chamber empty diaphragm expansion tank at room temperature. This value must equal the static pressure generated by the column of fluid in the system after its completion. Thus, before the introduction of the system into operation, the gas pressure in the tank compensates for the static head pressure, resulting in the membrane tank is in equilibrium and the tank is filled.
4) The maximum pressure, Pmax – maximum pressure in the system the location of the diaphragm expansion tank.
5) The average temperature of the system, Tsr, ° C – the average temperature of the system during its operation.

The order of calculation.
1) Determine the coefficient of expansion of the liquid Krassh (increase in volume,%) during heating (cooling) of 10 ° C (assumed that the system is filled at a temperature of 10 ° C) to the average temperature of the system. To determine this factor, the following chart