Choosing a mist collector
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Choosing a mist collector
The mist collector selects the model based on the required air volume. Check the required air volume in the following order.
In case of high airtightness for the source of mist
| Q： | Necessary amount of throughput for the mist collector (m³/min) |
| (A×B×C)： | Volume of processing room （m³） |
| N： | Ventilation frequency per minute （N/min） Ventilation frequency is 4 to 8 times and is set arbitrarily. |
In case of low airtightness for the source of mist
| Q： | Necessary amount of throughput for the mist collector (m³/min) |
| A×B： | The opening area (m²) |
| V： | Wind velocity (m/sec) (=0.5m/sec) |
Samples for the model selection (In case of High airtightness for the source of mist)
When selecting a mist collector to be mounted on an NC lathe machine with A = 1000 mm, B = 1000 mm, C = 1000 mm with a ventilation frequency of 8 times.
(1) Calculate the necessary amount of throughput for the mist collector.
Q = 1×1×1×8 = 8.0(m³/min)
(2) Select a mist collector temporally.
Temporally select a model that has the maximum air capacity more than the necessary amount of throughput in (1) . In this case, select GME-S750 with 11m³ /min of the maximum amount of throughput.
(3) Calculate the length of straight pipe parts.
1.0 + 1.0 + 0.5 = 2.5(m)
(4) Convert the relevant length of a straight pipe for the curved part from Table1.
As R/D of the curved part is 1.5, the relevant length of a straight pipe is 10D based on Table1. As there are 2 parts of the curved part and the discharge opening of GME-S750 selected temporally in (2) is φ125, the relevant length of the straight pipe for the curved parts of ducts can be calculated as follows.
10×0.125×2 = 2.5(m)
(5) Calculate total length of the straight pipes.
2.5 + 2.5 = 5.0(m)
(6) Select the mist collector.
Check the cross point of the resistance curb for (5) the total length of the straight pipes and (2) the P-Q curve of the temporally-selected mist collector (Figure1).
According to Figure1, the air volume is 9.5m /min for 60Hz when the relevant length of the straight pipe for ducts is 5m, which exceeds the necessary amount of throughput calculated in (1) . Thus, select GME-S750.
*Values may change due to the type of ducts. Please ask details to a duct maker.
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