Overflow valve
An overflow valve is a component in heating , solar or cooling systems .
The overflow valve is installed between the flow and return of a system. In systems without a mixing valve , it can also be installed between the pressure and suction side parallel to the heating circulation pump .
The valve limits the delivery pressure of conventional circulation pumps. It ensures a minimum volume flow in the boiler circuit by opening as soon as the delivery pressure exceeds the value set on the valve. This case occurs when little or no heating power is required in the connected heating circuit . In this way it ensures a constant pressure difference. As a side effect, the overflow valve reduces annoying throttle noises from thermostatic valves as well as possible vapor bubble formation and thus cavitation damage to the pump wheel. Overflow valves are not a substitute for safety valves .
In comparison with speed- or pressure-regulated pumps, however, no energy savings can be achieved with an overflow valve, since the pump continues to deliver a constant volume flow.
Individual evidence
- ↑ Overflow valve - functionality and benefits. In: heizung.de. Retrieved August 26, 2019 .
- ↑ Individual room control. In: bosy-online.de. Retrieved August 26, 2019 .
- ↑ Overflow valve - SHKwissen - HaustechnikDialog. In: haustechnikdialog.de. Retrieved August 26, 2019 .
- ↑ Mankenberg - Know-how overflow valves. In: mankenberg.de. Retrieved August 26, 2019 .