| 摘要 |
The invention relates to a non-rechargeable package comprising a valve casing (4) with a main valve (11) and an auxiliary valve (19) cooperating with a seat (23) and initially primed in the open position by a locking disk (49) which is unlocked, at the end of a first filling, by an extension (39) of the main valve (11) rendered active by a displacement of the main valve (40) beyond its normal open position. The auxiliary valve (19) is then bearing on its seat (23) by a weak spring (46). Any underpressure during tapping off causes the auxiliary valve (19) to open, whilst any excess pressure during filling strikes the auxiliary valve (19) in the closed position. <IMAGE> |
