| 摘要 |
The control valve (10) for the vacuum level in a milking plant is of servo-assisted type for medium-low capacity, and has a valving element (32) of plastic material suitable for contact with foods. The valving element (32) comprises: a hollow stem (34), the cavity of which is at least partly threaded (38,40) for partial engagement (38) with a screw (36) which enables one end of the stem (34) to be fixed to the main elastic membrane (30) of the valve (10); a seal element (42) intended to close the air passage channel (18), the seal element (42) being coaxial to the stem (34) and presenting a coaxial through hole (44); and a coaxial stabilizer (48) insertable into the air passage channel (18) and provided with angularly equidistant fins (50), the stabilizer (48) being provided with a coaxial shank (46) the threaded free end of which is insertable into the through hole (44) of the seal element (42) and can be screwed into a part (40) of the threaded cavity of the stem (34). <IMAGE>
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