| 摘要 |
<p>1. Valve with non-return device connected on the one hand to a water supply network under pressure, and on the other hand to a closed receptacle to be filled, comprising an inlet valve member (6), an outlet valve member (7) and an intermediate valve member (8) located in series on the path followed by the water inside the valve, the intermediate valve member (8) having its direction of opening opposite that of the other valve members (6, 7), the opening of the outlet valve member (7) being control led by the pressure of the water, and the opening of one of the other valve members being controlled by a push rod, characterised in that it is constituted by a body (1) closed at one its ends by a cover (2) prolonged by a tube (17) connected to the water supply network, wherein there slides a hollow piston (3), on the inside whereof is installed a membrane holder (4) integral on the one hand with the piston (3), on the other hand with the push rod (5), and by a valve member holder (9) inserted between the cover (2) and the corresponding end of the body (1).</p> |
