| 摘要 |
<p>A valve comprising a body (1) having a cylindrical sliding seat (2) and an opening (3) for the passage of air; a plunger (5) sliding axially inside the aforementioned seat, for regulating the aforementioned air supply opening (3); and an electromagnet (6) the core 10) of which presents a rod (11) fitting through an axial hole (12) on the plunger. According to the present invention, the plunger is connected elastically to the rod by means of two springs (13, 14), each designed to exert elastic force on the plunger in the opposite direction to that of the other spring; regulating means (17) being provided for enabling predetermined preloading of both springs.</p> |
