Roma Air Vent

The "ROMA" 
model automatic air vent is an automatic valve with single float, used 
for the evacuation and discharge of large volumes of air from water 
supply pipes. The integrated tap device is equipped with a dual position
90° male seal. Position "A" communicates the system with the upper air 
discharge recess while position "B" bypasses the system discharge recess
and permits its draining through the front slot. This renders it 
particularly ideal for installation in zones outside buildings where 
there is a high risk of freezing. The "ROMA" air vent valve may only be 
installed vertically. In order to maximize the efficiency of the 
discharge, it should be installed at the highest points in the system 
or, if this is not possible, a TEE fitting should be installed at the 
input, as in figure "C". When installing it at the top of an ascension 
pipe, a conveyable discharge hose can be installed (option available 
only on request). The particular spherical profile of the internal 
floater-obturator in special thermoplastic rubber forestalls water 
spatter during the sealing phase, in closure. The absence of sliding 
guides, hence drag, allows the spherical floater an elevated velocity 
and precision in closing besides avoiding dangerous incrustations. At 
the discharge outlet there is a protective catch for dust and lint, 
which, over time, could deposit upon the opening of the cap, obstructing
it; moreover, being perforated, anti-tampering seals may be used in 
compliance with legislation currently in force.