Hydraulic couplings

Hydraulic clutch – modern designs for heating installations

Onninen Wholesale offers hydraulic clutches from the best manufacturers on the market, such as Flamco Meibes, Elterm and Afriso. This device is essential if you want to successfully connect the heating and boiler circuits. Check out the entire offer available on our website.

Principle of operation of a hydraulic clutch for a heating system

A hydraulic clutch is a specialist device that allows the connection of heating devices with different or the same operating parameters (e.g. heat pump, gas boiler) and several heating circuits, even if they are characterized by different temperature parameters. This can be, among others, power supply for underfloor heating, power supply for convection heaters or production of domestic hot water.

This device is most often available in the form of a vertical water tank, which has hot connectors in the upper part (supply from the heat source), and cold connectors in the lower part (where the medium returns from the receivers). Proper circulation of the heating medium occurs when each of the connected heating circuits is equipped with its own flow force, i.e. a pump.

Hydraulic clutch – where can it be used?

The hydraulic clutch is used in compact central heating systems, wall-mounted boilers with a built-in pump, and also in medium and high-power systems. In the latter case, the clutch can effectively replace multi-way mixing valves and mixing-pump systems.

How does a hydraulic clutch work? 4 operating states of the device

• Starting the system – takes place with the flow of the heating medium through the receivers closed.

• The demand for thermal energy on the heating circuit side exceeds the amount of energy produced by the heat source (or sources).

• Heat production on the source side is identical to the demand for thermal energy on the receiver side.

• Heat production in the source is greater than the demand for heat on the receiver side – among other things, the flow of the medium through the automation of heat receivers is reduced.

The main advantages of hydraulic clutches from the Onninen wholesaler

The main advantage of using clutches from our suppliers is that the operation of the heating device circulation pumps is not disturbed by the heat collection system pumps. Similarly, the circulation pumps on the heat collection side do not interfere with each other's operation, just like the circulation pumps of the heat sources.

The advantages of a hydraulic clutch also include the possibility of desludging the heating medium (the sediment safely collects at the bottom of the device), as well as a lower price and lower failure rate compared to other solutions, e.g. multi-way valves.

Hydraulic clutch with distributor

Another type of hydraulic clutch that you will find in the Onninen wholesaler is a hydraulic clutch with a distributor. It is designed as a tank with nozzles on one side (intended for connecting a heat source) and with nozzles on the other side (adapted for connecting heat receivers). The distributor and the clutch are placed in the tank, which are separated by a partition that allows the flow of the medium from the clutch to the distributor. The entire structure is thermally insulated.

Breather and hydraulic clutch

Selected hydraulic clutches available in the Onninen wholesale assortment are equipped with an automatic vent with a step valve. This system allows the heating medium in the clutch to be vented and the air accumulated in its upper part to be removed.

Efficient hydraulic clutches? Visit our website onninen.pl

Our wholesale website offers a wide range of hydraulic clutches. Remember to carefully read the parameters of specific models, such as maximum heating power or the size of the boiler connections, before purchasing. You can easily filter them using the property selection option on the left. We invite you to shop!