| 摘要 |
Ball-cock, in the body 11 of which there is housed, between two opposed annular seals 15, 16, a spherical stopper 17 rotating by control about a diametral axis, the said body 11 having a first passage 12 aligned on the rotational axis of the spherical stopper 17 and a second passage 14 emerging facing the internal portion of one of the seals. In the ball 17 there is provided a first orifice 18 which constitutes an extension of the first passage 12 and communicates with a second orifice 19 orthogonal to the first 18 and which constitutes an extension of the said second passage 14 for a preestablished angular position of the stopper 17. The ball 17 preferably comprises a third orifice 20 diametrically opposed to the orifice 19 and of smaller cross-section. <IMAGE>
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