COMPACT COFFIN PURIFYING VALVE – VA807

PURIFYING VALVE FOR AIRTIGHT HOODS

Mechanically opening adsorbent charcoal filter to allow gases generated inside the hood to escape.
Gas flow is regulated by a valve controlled by the change in pressure inside the hood.

At mechanical opening controlled by the rise of pressure in the hood (2 cents above the external pressure) to avoid any damage to the case and hermetic re-closing with the fall of internal pressure (already at 8 thousandths above the external pressure).

In compliance with European Standards: in accordance with Eurovent requirements (NF44013 and NF44011) have passed the tests for filtration of aerosols (dust and particulates) and absorption of nitrogen and sulfate compounds according to the “Protocoles d’essai des appareils pour cercueils hermétiques” du Conseil Supérieur d’Hygiène Publique de France and the additional tests of the Italian Ministry of Health for the uptake of acetic and formic acids, of phosphoric hydrogen, methylmercaptan and trimethylamine. (Authorized by the Ministry of Health by Decree of July 29, 1999)

– Opening pressure: 1.020 bar
– Closing pressure: 1.008 bar