Because most of the experimental materials are toxic, there are potential safety hazards in all parts of the fume cabinet and related ventilation pipelines. Therefore, before carrying out various inspection and maintenance, it is necessary to confirm that there are no dangerous factors. Any staff engaged in maintenance inspection must wear protective equipment (such as acid-resistant). Alkali gloves, protective eyes, protective masks, masks, etc. If any dangerous condition is found in the process, it should be eliminated immediately before maintenance can be carried out.
In order to maintain the safety of operators and prolong the life of ventilators, the exhaust system should maintain normal operation at any time.
The following points are recommended for maintenance every three months:
(1) Use neutral detergent to clean all parts of the cabinet, including glass windows, lining boards and guide boards inside and outside;
The slideways, cables and balancing pulleys of the lubrication regulating door.
The following points are recommended for maintenance every six months:
(1) Check whether the regulating mechanism is corroded or damaged;
(2) Check whether the fans, motors, rotating shafts and bearings are working properly;
(3) Testing whether the remote control devices (faucets, gas copiers) can operate normally;
(4) Check whether there is leakage in the exhaust outlet pipeline, especially in the connection between the exhaust hood and the pipeline;
Check whether there are magazine piles in the exhaust hood, especially in the elbow.
Maintenance of ventilation counter:
Maintenance of ventilation counter panel:
（a）通风柜台面虽可耐 摄氏，但不倡议长时间与明火， 摄氏直接接触。使用电炉时，需加石棉垫板或三角支架隔热；
(a) Although the countertop of the ventilation cabinet can withstand high temperature, it is not recommended to keep in direct contact with open fire and high temperature for a long time. When using electric furnace, asbestos cushion plate or triangular bracket should be added to insulate the heat.
（b）通风柜台面虽对各种化学品均具有良好之恳子 葱裕な奔浣渍接触，亦可能产生若干影响，易于 倡议若有化学品滴落台面时，应尽快予以清楚。
(b) Although the countertops of ventilation cabinets have good corrosion resistance to various chemicals, prolonged immersion contact may also have some effects. Therefore, it is suggested that if there are chemicals dropping on the countertops, it should be clear as soon as possible.
(2) The following suggestions are made for maintenance every three months.
A. Check whether the regulating mechanism is corroded or damaged;
B. Inspect the operation of each fan, motor, shaft and bearing.
C. Testing whether the remote control devices (faucets, gas copies) can operate normally;
D. Check whether there is leakage in the exhaust outlet pipeline, especially in the connection between the exhaust hood and the pipeline;
E. Check whether there are magazine piles in the exhaust hood, especially in the elbow.
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