21S: PRESSURE SWITCH 2 CHANGE-OVER CONTACTS ½” NPT 10A IP65 CE
Pressure switch 2 change-over contacts 10A IP65 CE with ½” NPT connection with test. It is realized and tested in our seat.
It is used when there is the necessity to organise the distribution through the manifold, in according to NFPA12, which provide the protection of one local or more locals.
It is installed directly on the main manifold and on the system lines where there is the flow, through the translation of a small piston inside the pressure switch (which commutes the contact), it resends an electric signal to the centralized control panel, in order to confirm the pressure inside the pipe and therefore the start of distribution.