| 摘要 |
<p>A flowmeter having a non-return valve suitable for use is systems for supplying fuel to petrol or diesel engines or systems for supplying spraying liquid to agricultural or horticultural spraying equipment. The valve includes a valve body having an inlet section formed with a fluid inlet and an outlet section having an end wall formed with fluid outlet means in the form of one or more slits. The outlet section is made up of one or more parts, each of which tapers in a direction from the fluid inlet towards the fluid outlet means. The or each part of the outlet section has an elongate end wall, which forms a part of the end wall of the body and is formed with a slit of the fluid outlet means, and two side walls, each of which slopes towards the associated end wall and terminates at a longitudinally extending side of the end wall. The end wall and side walls are made of resilient material. Each slit is closed when the pressure of fluid inside the outlet section is less than or equal to the pressure outside but opens when the pressure of fluid inside the outlet section is greater than the outside pressure.</p> |
