| 摘要 |
<p>In a non-returnable pressure vessel there is a combined filler and extractor valve comprising a valve body (11) fitted to move in a drilling of a valve housing (8) and pressed by a spring against a valve seat, which can be lifted off its seat both during filling and extraction. In addition, the valve comprises a second valve body (22) which is held off its valve seat (16) before the first filling of the vessel by a barrier (17, 18) which can be overcome and will allow fluid through. After the vessel has been filled, the second valve body (22) is pushed beyond the barrier (17) and with its valve seat (16) forms a clack valve which prevents the vessel (1) from being refilled. In order to produce the valve more economically, the valve housing (8) is made of plastic in one piece with a first drilling (10) to take the first valve body and a second drilling (15) to take the second (22). The end of the first drilling (10) opposite the first valve seat (9) has a radially inwardly-directed shoulder (14) in one piece with the housing on which there are projections (18) made of plastic in one piece with the valve housing and projecting radially inwards into the circular base plan of the second drilling (15). The first valve body (11) is supported on the shoulder (14) via a helical spring (13), while the projections (18) form the barrier for the second valve body (22).</p> |
