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.
When the airtightness of the mist source is high
| Q: | Necessary amount of air flow for the mist collector (m³/min) |
| (A×B×C): | Volume of processing room （m³） |
| N: | Ventilation frequency per minute (N/min) Ventilation frequency can be set arbitrarily from 4 to 8 times. |
When the airtightness of the mist source is low
| Q: | Necessary amount of air flow for the mist collector (m³/min) |
| A×B: | Opening area (m²) |
| V: | Wind velocity 0.5 (m/sec) |
Examples of model selection (when the airtightness of the mist source is high)
When selecting a mist collector to be mounted on an NC lathe machine of A = 1,000 mm, B = 1,000 mm, and C = 1,000 mm with a ventilation frequency of 8 times per minute.
(1) Calculate the approximate necessary amount of air flow for the mist collector.
Q = 1×1×1×8 = 8.0(m³/min)
(2) Provisionally select a mist collector.
Provisionally select a model with a maximum air flow that is more than the necessary amount of air flow in (1). In this case, select the GME-S750-Pro with a maximum air flow of 11 m³/min.
(3) Calculate the length of straight pipe parts.
1.0 + 1.0 + 0.5 = 2.5(m)
(4) Convert the straight pipe equivalent length for the curved part according to Table 1.
As R/D of the curved part is 1.5, the straight pipe equivalent length is 10D according to Table1. As there are two curved parts and the duct diameter at the discharge port of the GME-S750-Pro provisionally selected in (2) is ø125, the straight pipe equivalent length for the curved parts can be calculated as follows.
10×0.125×2 = 2.5(m)
(5) Calculate the total straight pipe equivalent length.
2.5 + 2.5 = 5.0(m)
(6) Select the mist collector.
Check the intersection of the resistance curve for the total straight pipe equivalent length calculated in (5) and the P-Q curve of the mist collector provisionally selected in (2) (Figure1). According to Figure1, the air flow is 11.3 m³/min when the straight pipe equivalent length of the duct is 5 m, which exceeds the necessary amount of air flow calculated in (1), so select the GME-S750-Pro.
* The values may vary depending on the type of duct. For details, contact the duct manufacturer.
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