What kinds of tools are needed for the pressure adjustment of an overflow valve?
Depending on the series, the pressure can be adjusted by means of an open-ended spanner, a hex key or by hand wheel.
What opening characteristic does an overflow valve have?
An overflow valve has a proportional opening characteristic, i.e. the more the pressure of the medium rises, the more the overflow valve opens in order to discharge the required output.
Does an overflow valve carry out a safety function according to PED?
No, an overflow valve is not intended to be the last safety device of a plant. In an installation, an overflow valve carries out a control function.
What impact does back pressure have on the setting of an overflow valve?
Goetze overflow valves with metal bellows can compensate back pressure up to a maximum of 4 bar, therefore there is no impact on the set pressure. Overflow valves without bellows however are not back pressure compensated.
What are the advantages of using an overflow valve with metal bellows?
Back pressure compensation up to a maximum of 4 bar.
Protection of sliding parts for applications with sticky or highly viscous media.