| 摘要 |
The invention relates to a filtering apparatus, the operation of which is based on alternating filtering and flushing stages. The apparatus comprises one or several filter elements placed into a filter housing supported by a casing, the filter housing being provided with an inlet assembly for the liquid flow to be filtered, an outlet assembly for the filtered liquid flow, and a channel for flushing the filter elements with air. Further, the filter housing is arranged to be prefilled with liquid before the next filtering stage is initiated after the flushing. According to the invention, a filling channel is directed into the filter housing through the casing, the channel being provided with a valve, which closes the channel at the same time as the filter housing is opened, for example, for changing the filter elements. Closing may be automatic. The filter housing may include a removable cover and an axle bar supporting the filter elements and arranged between the cover and the valve and operated by a spring, the bar being moved from its place from the effect of the spring upon opening the cover at the same time as the spring closes the valve. |
