Negative pressure fan as a common ventilation and cooling equipment in the workshop, its role and high cost performance is that we should pay special attention to, not only to use a good role, but also to use cost-effective high cost performance of capital. Let's get familiar with the main parameters of high quality negative pressure fan.

A, according to the composition of the gas you are pumping categories:

The waste gas composition in the indoor environment chooses the category of negative pressure fan. There are two kinds of negative pressure fan materials in the current industry. There is a negative pressure fan made of FRP anticorrosive material, and another is a negative pressure fan made of galvanized metal. If the waste gas contains acid and alkaline corrosion, it should be well used. If the exhaust environment temperature is not too high and there is no corrosion, the negative pressure fan made of galvanized steel plate can be used.

Two, according to the specific location of the installation of specifications and specifications:

The specific installation location of the negative pressure fan selected the specifications of the negative pressure fan, single fan exhaust volume, output power, etc. Adopt and install the specific position of the negative pressure fan as close to the specification as possible. If the specific location of the installation is large, the negative pressure fan used is too small, the actual effect of pumping is not very good, of course, it is difficult to deal with the leakage of rain water through the seal. The specification of the negative pressure fan is twice more than the specific location of the installation. Negative pressure fans cannot be installed.

Iii. Categories of adoption according to financial capacity:

The cost of FRP anti-corrosion negative pressure fan exceeds that of galvanized steel plate negative pressure fan. If there is sufficient project investment budget, use glass fiber reinforced plastic anti-corrosion negative pressure fan. Unexpectedly, FRP negative pressure fan is more cost-effective than galvanized sheet negative pressure fan. If the working capital is not enough, the galvanized negative pressure fan can be used, which can reduce some.

Four, according to the use of the term:

Negative pressure fan installed in the outdoor, often to the wind and rain, there will be in line with the actual conditions of use period, galvanized metal suction fan form rust after a certain time, usually can use 3-5 years, fiberglass anticorrosive suction fan is the corrosion by acid alkali glass fiber reinforced plastic resin materials, frame can't be rust, non-artificial damage can be used more than ten years, 50 if ready to use for a long time, Glass fiber anti-corrosion negative pressure fan is used.

Five, according to the repair difficulty coefficient layer:

Negative pressure fan in the use of the whole process of maintenance phenomenon. FRP anticorrosive negative pressure fan includes a motor driven directly to drive the fan impeller to form exhaust. Using the whole process of maintenance and maintenance is easy to clean dust and dust. Galvanized metal negative pressure fans are mostly driven by belt discs, which drive fan blades to rotate and form exhaust. Belt aging wear for a certain period of time, belt replacement frequently, maintenance is difficult, maintenance costs are more than the glass fiber reinforced plastic anti-corrosion negative pressure fan.

Six, according to the influence of pumping volume:

Under the premise of the same specifications, model specifications and motor energy consumption, the pumping volume of FRP anticorrosive negative pressure fan is basically more than that of galvanized negative pressure fan, which is also due to the motor quality of FRP anticorrosive negative pressure fan, and the exhaust Angle of fan impeller is more than that of galvanized negative pressure fan.