Applications
Construction and Features (1) Bar Screen Chain is constructed like roller chain. There are three specifi- cations in this kind of chain. Select the appropriate type based on the corrosiveness of the operating environment (Table 6.5). (2) Available attachments—Y and A-2 (Type I)—are made of heat-treated steel. (3) S-rollers and F-rollers may be used with this chain. The difference between the two include the following points: S-roller: Adapted to a rake with wheels. The rake rotates and sweeps out the waste. (This is sometimes called a rotating-rake design.) F-roller: Adapted to the rake without wheels. The rake is fixed on the chain. The F-rollers support the weight of the rake. In an F-roller set-up, the flange may alternate sides every one or two rollers. This arrangement prevents derailment. Because the inside width (W) of the chain is larger with the F-roller, the chain is called PJW specification to distinguish it from others (Figure 6.35). Each chain attachment is exposed to high load, because there are only two or three rakes installed on the chain. Y attachments are used in the rotating-rake design (Figure 6.36), and A-2 (Type I) attachments are used in the fixed rake type (Figure 6.37). Both attachments have additional features that increase their strength: the end of the connecting pin is threaded and equipped with a nut to prevent falling off.
Table 6.5 Specifications for Bar Screen Chain
Side Plate
Pin, Bushing, Roller
Standard Series Heat-Treated Steel
Heat-Treated 400 Series Stainless Steel Heat-Treated 400 Series Stainless Steel
PJ Series SJ Series
Heat-Treated 400 Series Stainless Steel
304 Stainless Steel
304 Stainless Steel
Figure 6.36 YAttachment
Figure 6.35 PJW-Specification Bar Screen Chain
Figure 6.37 A-2 (Type I) Attachment
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