AirPrime Operation ►
This diagram displays the air movement within the Automatic AirPrime.
Pressurized air from the air brake system enters the top left (green arrow) of the primer and draws air from the fire pump inlet piping.
Air is exhausted at the bottom of the primer.
On Automatic models, the primer will start and stop when the switch is in the AUTO mode (upper position) based on a signal it receives from the pressure switch. The primer will activate when pressure drops below 20 PSIG [1.4 BARG].
© Trident Emergency Products 2019