| 摘要 |
The control head (21) has a membrane (4) which is acted upon by a flow, and which is connected to a control rod. It is also connected to a chamber spring (6) which acts against it. The membrane is connected rigidly in the lower region to a small hat (3), which is arranged on a rod (7) so that it can move upwards. The hat is located above openings (15), and is arranged on a control cone (2) which is fixed to the housing of the control head, in order to open or close them. The rod may be arranged in the centre of both the cone and the hat, and the latter may be held down by a securing ring (14).
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