A hydraulic clutch is a device used in heating systems. It is a way to connect different circuits, e.g. boiler and heating, which are characterized by different operating parameters. What is the purpose of a clutch and how to choose the right size?
Hydraulic clutch in the heating system
The use of a hydraulic clutch is used in medium and high power systems. The device is necessary when different systems operate simultaneously, and each of them has its own heat pump. In such a structure, a device is necessary that will help connect the individual circuits, balance the pressure and flows between the boiler and the receiving installation. The solution is used in heating installations in heat pumps, primarily the water/air type and in compact and wall-mounted boilers, in which the water capacity is not large.
Check hydraulic clutches at the Onninen wholesaler
The construction of a hydraulic clutch is not complicated, because it is a closed part of the installation, with connected nozzles. It is an element connecting the boiler with the installation, which is usually made of stainless steel or carbon steel.
Using a hydraulic clutch brings many benefits, including extending the life of the boiler and individual pumps. This is a great way to avoid having to regulate individual systems. In practice, there are different versions of a hydraulic clutch, adjusted to the flow rate of heating water. Adjusting the flow rate allows for mitigating the impact of individual heat receivers on its source.
In the heating system, a hydraulic clutch is used:
- when the flow resistance in the heating system is too high in relation to the lifting height specified for the circulation pump built into the wall-hung boiler,
- when the water flow rate within the heating system is too high, which is disproportionate to the flow rate capacity specified for a given boiler,
- in cascade boiler rooms with wall-hung boilers equipped with a circulation pump,
- in cascade boiler rooms where constant and low-temperature boilers are installed, where it is necessary to ensure a specific return temperature in the circuit,
- when it is necessary to ensure cooperation between heating boilers and old elements of the heating system.
In a heating system, it is very important that the individual elements are matched to specific parameters, then the efficiency of the entire system will be optimal.
Balance of heating water flow rates through the boiler and the heating system
The water flow rate in the heating system is determined together with the permissible flow rate for a specific boiler model. This value is given in litres per hour. The flow rate of heating water through the boiler is determined by two parameters. The first is the heating power of a specific circuit, the second is the temperature difference that is reached at the supply and return points. The whole is calculated based on a mathematical formula, thanks to which the obtained results are precise values, allowing the clutch variant to be matched to the needs and capabilities of a given system.
Check hydraulic clutches at the Onninen wholesaler
Selecting a hydraulic clutch
Hydraulic clutches are available in various versions, but the choice of the right model depends on the needs of the project. When browsing the offer of hydraulic clutches, you can see that they differ in parameters and purpose. Many manufacturers indicate for which conditions and system the individual solutions are dedicated. Of great importance is the information regarding the heating power, which is transferred directly to the heating system, taking into account the temperature difference achieved at the supply point and the return to the boiler.
When looking for the right variant of a hydraulic clutch, it is necessary to determine the flow rate of heating water. The correct selection of parameters allows for obtaining optimal heating parameters in the building and limiting the wear of individual system elements. This solution is convenient, functional and exceptionally practical.
Another important aspect is the issue of the boiler you have, as different solutions are used in the case of low- and constant-temperature boilers and condensing boilers. In the case of constant and low-temperature boilers, it is possible to increase the return temperature, which does not happen when using condensing boilers.
Another criterion is the water capacity of the boiler. If the maximum flow rate of heating water is lower than the flow rate in the installation, it is necessary to use a hydraulic clutch.