FRP negative pressure fan is a new type of anti-corrosion FRP ventilation equipment, which belongs to axial flow fan. Since the outer frame of the fan is made of anti-corrosion fiberglass, its working principle is to use negative pressure ventilation to complete the purpose of air circulation, ventilation and cooling. In this issue of news and information, the editor will introduce the maintenance considerations for negative pressure fans.

1. When the negative pressure fan is not used for a long time, it is necessary to check whether the connecting parts are firm and reliable, and then it can be officially used after trial operation.

2. After the negative pressure fan is officially put into operation, whether the screws are loose, and whether the wire cover is damaged, repair it every year.

3. Check and check if the air filter is dirty. If the air filter is dirty, remove the air filter, loosen the wing nut, remove the cover and clean the filter sponge (be careful not to drip dust into the fan body when removing the filter).

4. Check the flexibility of the negative pressure fan protection valve every day. If it's not flexible, clean and debug to keep it open and closed.

5. Check for oil leakage or air leakage daily and carry out maintenance. If it cannot be repaired, please notify the manufacturer in time.

6. Clean the negative pressure fan room every day to keep it clean and ventilated.

7. Frequent inspections. Fans, motors and other operating conditions have high noise and abnormal temperature. It is necessary to stop and repair in time.

In practical applications, FRP negative pressure fans are generally used for plant ventilation, mainly in places with corrosive acid and alkali. During installation, the fan is installed on the window on one side of the indoor wall, and the air inlet adopts the window or door on the other side corresponding to the room. Air is ventilated by convection from the air intake to the fan. During this process, the doors and windows near the fan remain closed, and air flows into the room through the doors and windows on the side of the air intake. Air enters the room from the air intake, flows through the room at some wind speed, and exits where the negative pressure fan is installed. The fan has ventilation function, and the ventilation rate can reach 99%. Through specific engineering design, the ventilation speed and wind speed are designed according to the needs, and the high heat, harmful gas, dust and smoke in the workshop can be quickly discharged to solve the problem of poor ventilation. Ventilation is achieved within seconds of turning on the fan.