The heating system must be set up, these works can be carried out in different ways. This need arises in order to achieve work efficiency, when the parameters at each section of the network are as close as possible to the calculated ones. Today, several means of regulating the system are known, but manual balancing valves are the most modern.
Assignment of the balancing valve
The heating circuit necessarily requires hydraulic adjustment. The purpose of this manipulation is to bring the coolant flow to the calculated value, this makes it possible to ensure that the required amount of heat is delivered to each battery.
In the simplest schemes, the flow rate is ensured by correctly selected pipe diameters. When the system is more complex, the adjustment can be made with washers that guarantee the flow of the required volume of water. However, these methods can be called outdated, today a balancing valve is increasingly being installed.
PoIn appearance, it is a manual valve that allows you to adjust the volume of the coolant. As an addition, two fittings are built into it, they are necessary for:
- interaction and connection of the capillary tube to other controls;
- changes in pressure in different places in relation to the regulating mechanism.
You can find out the magnitude of the difference to the regulators by measuring the pressure in the fittings, this allows you to determine the flow rate of the coolant in the area. By reading the instructions for the valve, you can determine the number of turns of the handle for the required water flow.
Additional information about the appointment
You can find products from some manufacturers on sale, this includes the Danfoss manual balancing valve, which allows you to measure the amount of flowing water using devices of the same brand. This helps to make the process easier, because you don’t need to do any calculations, but you will have to spend money to purchase such equipment.
According to the purpose, such devices should be divided into manual valves and automatic type regulators. In the second version, the delivery set includes two devices, among them one can also highlight the differential pressure regulator.
Varieties of balancing crane
Manual balancing valves are available in different designs. Models may have their own design features of shut-off and balancing valves. You can subdivide the valves according to the location of the stem, which happens:
- direct;
- beveled.
In the first case, the stem is at right angles to the body. The beveled position of the stem provides the element with high hydraulic characteristics. Manual balancing valves are also classified according to the shape of the seat, it can be:
- cylindrical;
- straight;
- conical.
Manual Balancing Valve Prices
Manual balancing valve MSV can have a different cost depending on the characteristics, among them it is necessary to highlight the diameter, connection parameters and throughput. If the first parameter is 15 mm, and the second is Rp 1/2, while the third is equivalent to 3 m3/h, then you will have to pay 1000 rubles for such a part. When the diameter increases to 32 mm, and the throughput becomes 18 m3/h, then the cost will increase to 2205 rubles
Manual flange balancing valve will cost much more. A product marked MSV-F2 with a diameter of 15 mm costs 5950 rubles, while the throughput will be 3.1 m3/h. With an increase in diameter to 32 mm and a throughput of 15.5 m3/h the price is 8100 RUB
Installation
In order to achieve measurement accuracy, the valve must be installed on a flat area that does not have bends. The length of such a zone will depend on the diameter of the pipe. For example, before the valve, the length should be 5pipe diameters, after it - 2 diameters or more. If these recommendations are neglected, then the error can reach a limit of 15 to 20%.
A manual balancing valve, the price of which is very high, will still not provide efficient operation if the rules are not followed, under which the element must be mounted with a distance of 10 pipeline diameters from the pump. This is true when the valve is located after the circulation pump. This assembly must be located in a place where it is convenient to configure, dismantle and operate it.
Water should move in the direction of the arrow on the body. You can install the device vertically or horizontally, there are no special restrictions for this. The housing must not be subjected to external pressure. A strainer must be installed in the system, otherwise the valve will quickly become clogged.
Specialist recommendations
Filling the system on which the balancing valve is installed must be carried out in a special way. If we are talking about a dynamic valve, then the presence of filling fittings should be provided, they should be close to the valve, they must be installed on the return pipeline.
If manual balancing valves are installed on the supply line, they must be closed. To adjust, use a flow meter or a flow and pressure differential table. But the initial calculation must be done at the planning stage of the heating system.
Installation schemebalancing valve
The balancing valve can be installed according to one of the existing schemes. The first involves the use of external networks, in which case a throttle network should be used. It is able to limit the overspending of water and pressure. If there are devices in the heating network that are responsible for regulating the water supply, then a manual valve should not be installed.
The balancing valve can also be mounted on an extensive system of cooling, water supply and heating. Using these schemes, you can solve the problem of excess pressure. When branching is used, you may experience overflow in one direction and negligible flow in the other. To equalize the pressure, the described device is installed. Ultimately, it is possible to obtain an average flow rate at all points. The balancing cock should not be used if the circuit has a slight outline.
Conclusion
Even if the heating or plumbing system has been correctly calculated and installed, it requires initial setup. During further operation, it will be possible to regulate the distribution of temperature and pressure using control valves, among such elements it is necessary to single out not only balancing valves, but also pressure reducers, as well as bypass screens.
