| Filtering common sense |
| Filter resistance |
| 2008-10-27 15:28:39 |
| (has been browse 570 times) |
| Filter to form airflow to the resistance. Filter deposition, the increase in resistance, when a provision to increase the resistance value, the filter scrapped. The new filter resistance "in the early resistance"; corresponding filter scrap value of the resistance "end resistance." Design, often need a representative value of the resistance to wind accounting system, the resistance value of the "resistance design," is to get used to early resistance and resistance at the end of the average. Determine the final resistance The final choice of resistance is directly related to the life of the filter, the system changes in the scope of the air volume, the energy system. Under normal circumstances, the end of the resistance is to select the air-conditioning designers. Experienced engineers can change the situation at the scene of the original design of the end of the resistance value. Some designers will tell the user forget that he selected the final value of the resistance; sometimes the user will change other type filters or other suppliers, this time, on-site engineers had to determine their own end resistance value. In most cases, resistance is the beginning of the end of the resistance 2 to 4 times. The more dirty filter, the faster the growth of resistance. High end of the resistance does not mean that the value of the filters will significantly extend the life of, but it will make sharp drop in air volume air-conditioning system. As a result, there is no need to end resistance values as being too high. Low-efficiency filters frequently used ≥ 10mm diameter of the fiber media. As the gap between the fiber, too much of the resistance it is possible to filter on the deposition disperse, and at this time, the resistance is no longer increasing, but the efficiency of the filter to zero. Therefore, it is necessary to strictly limit the G4 filter following the end of the resistance value. Resistance monitoring Each paragraph should install filtering devices to monitor resistance. End resistance to rely on instruments to determine not only the feeling of the operator. The cheapest is a resistance device to monitor the U-tube pressure of dollars. Ramp control song tube pressure gauges and pressure relatively attractive terms. Table quality and price pressure are higher. In addition, there will be resistance to electrical signals into a differential pressure transmitter. In addition to the reading device to monitor resistance, the resistance should be added the final alarm. The easy solution would be to draw pressure on the red bar of dollars; insurance is the use of differential pressure switch. Under normal circumstances, the end of the resistance is to select the air-conditioning designers. Experienced engineers can change the situation at the scene of the original design of the end of the resistance value. Some designers will tell the user forget that he selected the final value of the resistance; sometimes the user will change other type filters or other suppliers, this time, on-site engineers had to determine their own end resistance value. In most cases, resistance is the beginning of the end of the resistance 2 to 4 times. The more dirty filter, the faster the growth of resistance. High end of the resistance does not mean that the value of the filters will significantly extend the life of, but it will make sharp drop in air volume air-conditioning system. As a result, there is no need to end resistance values as being too high. Low-efficiency filters frequently used ≥ 10mm diameter of the fiber media. As the gap between the fiber, too much of the resistance it is possible to filter on the deposition disperse, and at this time, the resistance is no longer increasing, but the efficiency of the filter to zero. Therefore, it is necessary to strictly limit the G4 filter following the end of the resistance value. Resistance monitoring Each paragraph should install filtering devices to monitor resistance. End resistance to rely on instruments to determine not only the feeling of the operator. The cheapest is a resistance device to monitor the U-tube pressure of dollars. Ramp control song tube pressure gauges and pressure relatively attractive terms. Table quality and price pressure are higher. In addition, there will be resistance to electrical signals into a differential pressure transmitter. In addition to the reading device to monitor resistance, the resistance should be added the final alarm. The easy solution would be to draw pressure on the red bar of dollars; insurance is the use of differential pressure switch. End resistance value of the proposed Filtration efficiency of the proposed specifications for resistance to the end, Pa G3 (crude effect) 100 200 G4 150 ~ 250 F5 ~ F6 (in effect) 250 300 F7 ~ F8 (high efficiency) 300 400 F9 ~ H11 (high-Asia) 400 450 Efficient and very effective 400 to 600 |
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