| 摘要 |
<p>A valve for opening and closing a main passage, comprising: a valve housing (61,75) and chamber (71), a main valve body (73) accommodated inside the chamber (71), a fluid inlet (10) and outlet (69), the main valve body (73) having a closing and opening position, the main valve body (73) dividing the chamber (71) into a first (97) and second (99) chamber portion, the fluid inlet (10) connected with the first chamber portion (97), a first passage (97, 151, 111, 133, 127a, 131, 155, 153) between the fluid inlet and the second chamber portion; a second valve body (139) having an opening and a closing position; and a second passage (153, 155, 131, 127b, 135) out of the second chamber portion (99), the second passage being open and the first passage being blocked when the second valve body (139) is in its opening position and vice versa.</p> |
