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Autom. Backflush Filter F400 F400 G

SAB-A-MAT DN 20 - 80

Nominal widthDN Nominal pressurePN

20 - 80 10

Fig. 1: F 400 Fig. 2: F 400 G

Field of Application

The automatically operating filter SAB-A-MAT type F 400/ F 400 G is a multi-purpose, self-cleaning and - to the greatest possible extent - maintenance-free filter for liquid media. The most remarkable features of this filter are its high efficiency, its low weight, its space-saving design, as well as its continuous filter operation during the cleaning phase. In order to filter fluffings, fibres, coarse, gluey, slime or film generating contaminations, we would like to recommend the types F 410, F 420, or F 430, or the dynamic cross-flow filtration plant QFA respectively.

Abstract

The filter type F 400 consists of a welded housing and the filter type F 400 G consists of a cast housing with opposite connecting flanges having off-set heights. The filter cover has been fixed with bolts and nuts. The scope of delivery will comprehend the venting device within the cover and the draining device within the housing. The filter can be equipped with a smooth or a pleated filter insert. The filter insert consists of a perforated plate, alternatively covered with cloths having different mesh widths.

Function

The contaminated medium will flow into the filter via the flange identified as the inlet. It will flow through the filter insert from the inside to the outside and will emerge in a purified state out of the flange identified as the outIet. During this process, the innovative programmed SAB control device will monitor the differential pressure occurring at the strainer by means of a differential pressure switch. As soon as the pre-set differential pressure of 0.2 to 2 bar (depending an the design) has been achieved, the dedusting procedure will be released. Moreover, depending an the operating conditions, the dedusting procedure can equally be released by a timing control or manually by pressing a button. The backwashing jet will travel along the internal part of the strainer insert, and the waste valve will simultaneously be opened, so that there will be a pressure drop with regard to the atmosphere, which will induce the dedusting of the strainer. In case of a closed system, the Filtration will not be interrupted during the backwashing procedure. After the set washing period, the waste valve will automatically close. In case of an open system, a throttle valve or a shut-off fitting should be provided at the filter outlet. These devices will be closed during the cleaning procedure via the SAB control. In any case, larger particles of solid matter should be prevented from entering into the filter, possibly by using a suitable preliminary filter. The required working pressure will depend an the filter fineness. In order to measure the operating pressure, it will be necessary to install a manometer at the side of the filter outlet.

Installation

The installation into pipings will be effected by means of flanges. Please ensure that the filter of the standard design is vertically installed - without any additional loads -, and mechanically stress-free. The medium should flow in the flow direction indicated at the housing. A wrong installation will cause functional disturbances of the filter. The waste discharge line should be installed in an unpressurized state without a cross sectional reduction, without an ascending gradient but, if possible, by providing a descending gradient to the waste collecting tank instead.
11.2008 © by Georg Schünemann GmbH, Bremen, Subject to modifications