SAFETY VALVE FOR TANK CONTAINING A PRESSURISED LIQUID FLUID SUCH AS LPG

摘要

The invention concerns a safety valve (1) for a vehicle tank designed to contain a gas fluid under pressure, such as LPG, consisting of a hollow body (2) wherein a spring (7) co-operating at one end with a closing gate (9). The safety valve comprises means for rating (8) pressure loads applied against the spring (7) at its other end, ejectable means for closing (20) the hollow body and means for derating(12) the spring (7) to enable the pressurised gas fluid to be released outside. The rating means (8) consists of a perforated screw (9) screwed into the body. The derating means (12) consists of a fusible material in the form of a thermally destructible washer.