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Roma Air Vent

Roma Air Vent
Roma Air Vent
Product Code : 30
Product Description

Roma Air Vent

HYDRAULIC FEATURES
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.

The lower anti-spray guard allows the hydraulic thrust to be distributed evenly across the entire surface of the sphere, limiting the turbulence to a minimum and guaranteeing a highly precise closure. The "ROMA" model air vent is used in conditioning plants, sanitary installations for water distribution destined for human consumption outside buildings under EN 805, and irrigation plants. Maintenance of the "ROMA" model air vent consists in the periodic verification of the closure of the integrated stop device. The male obturator can be checked by tightening the front hexagonal nut while moving the lever from position "A" to position "B" and vice versa. The lever should only be actioned manually and not with the help of any tools. In the event of water outflow from the upper seat of the air vent, substitute the internal sphere-obturator, which is easily accessible by dismounting the body cap. In case of prolonged inactivity, the device should be disinfected according to EN 805 §12. This product adheres to the standards set forth by the international health authorities for the transport of alimentary fluids and potable water.
TECHNICAL FEATURES
Pressure : 
Maximum allowable working pressure (PN) 16 bar
minimum accumulation 0.5 bar (Grade A according to EN 12266-1)
Range of operation air evacuation from 0.5 bar to 16 bar (tolerance ± 10% max. detected)
Temperature : 
maximum working temperature (TS) 0° C(excluding ice) +110°C
minimum plant storage -20° C (with recess fluid discharged)
Threading:  
Pipeline connection  Threads according to ISO 228/1
Requirements and tests as per:  
Air vents EN 1074-4
Seat tightness EN 1074-4 §5.2.2
Stop device EN 1074-2
Pressure tightness EN 1982 B.7
Pressure resistance EN 1074-4 §5.1.1
DESIGN
Cast brass body and male EN 1982 - CB753SEN 1074-4
Cap in brass  EN 12165 - CW617N
O-ring  NBR RUBBER
Spherical floater THERMOPLASTIC ELASTOMER
Sphere guard   ACETAL RESIN (POM)
PRODUCT SIZE
20 - M - 3/4"
25 - M - 1"
33 - M - 1" 1/4
Features Table




 


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