| 摘要 |
<p>In a device for feeding a controlled volume flow of liquid to a spray nozzle for automatic spray application a member (4) of displacement pump type is arranged in a conduit between a liquid source and the spray nozzle. The very feeding of the liquid in the conduit is caused by a pump means located upstream of the member of displacement pump type. The pressure of the liquid is measured by means (8, 9) upstream and downstream of the member of displacement pump type, and the throttling degree of a valve means (6) is regulated for obtaining a correspondence between the pressure values measured corresponding to a volume flow predetermined by the speed of the movable parts of the member of displacement pump type.</p> |
