Sieve
Bend Screen Selection
The dewatering
capacity of a wedge wire cross flow sieve bend screen is
primarily influenced
by the screen width, the slot opening, and the wire size (width).
The chart below shows typical
dewatering capacities in US gallons per minute (GPM) per foot of
screen width. Actual capacity
varies depending on the feed content and desired efficiency.
Application |
Slot Opening |
Wire Width | GPM / FT |
| Coal, 20% solids | .020" |
.063" |
120 |
| Coal, 20% solids | .020" |
.093" |
100 |
| Cranberry dewatering | .020" |
.063" |
100 |
| Seafood, plant effluent | .020" |
.063" |
60 |
| Coal, 20% solids | .040" |
.093" |
160 |
| Coal, 20% solids | .040" |
.120" |
120 |
| Vegetable, primary | .040" |
.093" |
130 |
| Meat Packing, wash down | .040" |
.093" |
60 |
| Coal | .060" |
.093" |
210 |
| Municipal, primary | .060" |
.093" |
150 |
| Dairy, wash down | .060" |
.093" |
120 |
| Wood Fiber, plant effluent | .060" |
.093" |
80 |
| Vegetable, waste | .125" |
.093" |
350 |
Screening
efficency and solids capacity are directly related to the length
(arc length). Longer
arc lengths should be considered for feed containing a high
percentage of solids. Screen
curvature and arc length are expressed as a segment of a circle.
60
degree x 30" radius, 31.4" arc length
45 degree x 45" radius, 35.3" arc length
60 degree x 40" radius, 41.9" arc length
45 degree x 80" radius, 62.8" arc length
 |
The
effective range of slot openings for a gravity-fed cross flow
sieve bend screen is
generally considered to be .015" to 1/8".
The
installation angle of a sieve bend screen is usually about 60
degrees from the horizon.
The point of size separation for this installation angle is
approximately 50% of the slot
opening size.
Industrial Screen Products, Inc. 1997