Question: Figure 5 - Filter Set for Q 1 9 Q 2 0 . Figure 6 shows an extract system for a grinding machine. To prevent

Figure 5- Filter Set for Q19
Q20. Figure 6 shows an extract system for a grinding machine. To prevent the escape of dust, the static pressure at section 2, just downstream of the hood over the machine, must be adjusted to give a manometer reading of 23 mm of water below atmospheric pressure. The loss coefficient for the louvres, excluding the exit loss from the duct, is 3. Calculate the required rise in total pressure across the fan. Assume that the air temperature is \(20^{\circ}\mathrm{C}\).
Figure 6- Extract System for Q20
Figure 5 - Filter Set for Q 1 9 Q 2 0 . Figure 6

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