| 摘要 |
A reverse flushing device has a housing with an inlet, an outlet and a first filter to receive the flow therebetween with means in the housing to divert flow through the first filter. A second filter, positioned upstream of the first filter, has an internal apertured housing with a movable apertured slide operable thereon to provide a closure to the second filter during flow through the first filter. The housing has a discharge aperture with a movable shut off element. The diverting means and tubular slide are responsive to opening of the shut off element whereby the former diverts flow through the first filter and the tubular slide aligns with the second filter housing to permit flow therethrough and into the tubular slide extension to reverse flush the particles on the first filter into the discharge aperture.
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