VENTIL FÜR DIE KONTROLLE DES GASDRUCKS IN EINEM BEHÄLTER

摘要

The invention concerns a control valve (c) for internal gas pressure of a liquid tank co-operating with an orifice ( 10 ) provided in the upper part thereof, allowing through a gas flow outside the tank when the difference between the internal pressure and the external pressure reaches a predetermined threshold, and an inverse flow when the internal pressure of the tank is lower than the external pressure. The invention is characterised in that the valve comprises a body ( 1 ) whereof the lower part is configured to close the tank orifice ( 10 ) with a mass such that beyond said pressure differential value constituting the predetermined threshold, the body ( 1 ) is spaced apart from the orifice ( 10 ), said body ( 1 ) further comprising a through recess ( 4 ) arranged in the extension of the tank orifice ( 10 ) when they are in contact, said recess ( 4 ) being provided with closing means ( 3 ) capable of being activated when the differential pressure between the tank and outside atmosphere is positive.