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Why a radiator valve insert for reversed flow direction is not the way to go
Radiator valve inserts for reversed flow direction
Our customer advisor teams are sometimes asked why we don’t offer a radiator valve insert that facilitates a reversed flow direction. This has mainly to do with the fact that an incorrect hydraulic system results in a reduced heat output of 30 to 50%, depending on the radiator.
“Although a radiator valve insert for reversed flow usually prevents the hammering noises that are otherwise produced, it doesn’t solve the issue of the incorrect hydraulic system that results in lower outputs. The power loss is, of course, not visually or aurally perceptible, but it does mean that customers do not get full value for their money. To avoid this, we recommend using a diverter piece [as shown in the picture above]”, says Marc Riesener Technical Customer Advisor at Purmo.
Krzysztof Kamycki, Product Director Valves, Controls and Connectivity at Purmo Group, agrees: “Changing the valve would not help sufficiently because this particular construction doesn’t allow for the radiator to make full use of its power. The cross connection on the bottom of the radiator does. Especially in low temperature heating systems, which are increasingly common, it’s even more important to use the right solution. If the supply and return pipes are interchanged here and the issue of power loss is neglected, the effect is even bigger and the system will have even more trouble creating the desired room temperature.”
If you have any further questions about this issue or would like expert advice for your project(s), don’t hesitate to reach out to our advisor teams. They are happy to assist in any way they can.