| 摘要 |
A gas rotary valve comprises a valve body (1), a valve core (2), a valve cover (3), an actuating shaft (4) and a regulator positioning pin (6). The valve core (2) has a large through hole (22), a first small through hole (23) and a second small through hole (24) which are all disposed on a peripheral surface of said valve core (2). A guide pin (41) radially disposed on the rear end of the actuating shaft (4), a first step (3a;3c), the rear end (61) of the regulator positioning pin (6) and a second step (3b;3d) are disposed in distance in the inner chamber of said valve cover (3), respectively preventing the guide pin (41) from rotating. The three through holes on the peripheral surface of the valve core can respectively be communicated with the inlet passage of the valve body. |
