MOS AIR KNIVES
Different types of air blowing are used in industry depending on application. We present their brief description and compare their basic parameters below:
Air blow drilled TUBE
It is the simplest and easy to implement solution with low purchase costs. However, it has a high level of noise level and relatively low efficiency. The main problem is high consumption of air, which is linked with high running costs.
Tube with nozzles
This is another rather simple solution using plastic nozzles that stream air more efficiently and thus increase the efficiency of air blowing. The main problem is very high consumption of air and high running costs.
Low pressure air knife
The use of low pressure air knife is a much sophisticated solution, its main advantage being work with low pressure, which means relatively low consumption of air and low running costs. Streaming of air and its efficiency is also satisfactory. The biggest drawback is rather high acquisition costs, which is due to the necessity to buy a source of low pressure air: a blower and distribution system.
MOS Air knife
MOS pressure air knife is linked with higher purchase costs when compared with a drilled tube or a tube with nozzles, but it is more efficient with lower noise level and air consumption, which significantly decreases annual running costs. Other advantages of MOS air knives are presented below.
Rough comparison of different types of air blow devices:
| Working pressure [bar] | Consumption per 100 mm of length [Nl/min] | Purchase costs [CZK] | Annual running costs [CZK] | Price in first year [CZK] | |
|---|---|---|---|---|---|
| Drilled tube | 4 | 680 | 1 000 | 55 162 | 56 162 |
| Tube with nozzles | 4 | 1005 | 3 360 | 81 526 | 84 886 |
| Low pressure knife | 0,2 | - | 110 000 | 19 680 | 129 680 |
| MOS air knife | 4 | 150 | 9 880 | 12 168 | 22 048 |
Calculated for 260 days a year, 8 hours a day, with price CZK 0.65/m3 of compressed air.