1、 Frequently asked questions in the use of mobile future extraction unit:

All valves cannot be opened during installation and commissioning by analyzing and eliminating the causes of stage faults. However, the pilot part acts to check whether the pressure of the air receiver is too low. Check whether some valves are not working. Check whether other valves are normal. Check the line connection of the valves and replace the coil. All valves cannot be closed. If there is air leakage, the pressure of the air receiver cannot establish a submerged valve. If there is air leakage, some valves of the same air receiver leak, causing the false appearance of all valves leaking. Check the air leakage rectangular valve, The air inlet of the valve is opposite to the nozzle. Some valves cannot be closed after reinstallation. There are air leakage valves, Close slowly. There are impurities adsorbed on the diaphragm. Clean the diaphragm. Check whether the diaphragm is complete. Check whether the moving iron core is jammed. Check whether the moving iron core and air plug diaphragm orifices are blocked. Dredge the diaphragm orifices. During the use of the diaphragm orifices, some valves leak. The diaphragm cannot be closed. The valve is normally open. There are impurities adsorbed on the diaphragm. Clean the diaphragm. Check whether the diaphragm is complete. The coil heats up. Burns the pilot. Damage. The moving iron core is jammed. Check whether the moving iron core and air plug are energized for a long time. Timely replace the accessories Check the working condition of the control system. If there is voltage but the valve does not work, the diaphragm is damaged or the orifice is blocked. Replace the accessories in time. If the ambient temperature is lower than - 10C °, the valve has air leakage or the valve cannot be opened. If the ambient temperature is too low, there is ice in the valve.

2、 Precautions for prolonging the life of use of mobile fume extraction unit:

1. Blockage of filter bag. When the filter bag is blocked, the resistance will increase, which can be shown by the increase of reading value of the differential pressure gauge. The filter bag blockage is the main reason for the filter bag wear, perforation, falling off and other phenomena.

Reasons for filter bag blockage

⑴ Temporarily strengthen dust removal to eliminate the blockage of filter bag; ⑵ Replace the filter bag partially or completely; ⑶ Adjust the installation and operation conditions.

2. The filter bag is damaged. The shape of the filter bag and the installation method and mechanism of the filter bag determine the position where the filter bag is easy to be damaged, so that inspection and maintenance can be carried out. However, the filter bag is damaged mainly due to the following reasons. In case of damage, please refer to the following table for inspection:

3. Aging of filter bag. If it is mainly caused by the following reasons, it is necessary to conduct cause investigation, take elimination measures and replace the filter bag.

⑴ Hardening and shrinkage due to abnormal high temperature; ⑵ Due to the contact reaction with acid, alkali or organic solvent vapor; (3) Reaction with water

4. The filter cloth should not be hung too loose or too tight, too loose is easy to accumulate dust, and too tight is easy to be damaged.

5. The new and old filter bags shall not be mixed to avoid affecting the normal operation of the equipment due to different damage time.

6. The replaced filter bag shall be purged with compressed air first, and then checked for holes. The holes shall be repaired before replacement. If the filter bag is stuck by dust, wash it with water and leave it to be replaced after cooling.

use of mobile fume extraction unit https://www.kaisenfilter.com/Mobile-Fume-Extractor