The altitude and the fan parameters

                                            The altitude and the fan parameters

In the purchase of the centrifugal fan, we have found some customers, purchasing the fan to the consumer,

Under the condition of the parameters of the fan is correct, pressure can not meet the use requirement.

In fact this is also a kind of selection errors.

Fan in different altitude, the use of the parameters is not the same.

The higher the altitude, the greater the pressure on the need.

At the time of the fan selection, we should try filter out using the local atmospheric pressure for selection.

The altitude and the fan parameters relationship:

1, the relationship with the pressure:

1.1, about 1300 meters high does not consider fan parameters change, only to appropriate increase in the selection of parameters of 3-5%.

In 1.2, altitude 1300 ~ 1500 meters above the fan pressure increased 5 ~ 8% can be considered.

In 1.3, altitude 1500 ~ 2500 meters above the fan pressure when considering 8 ~ 15%.

2, fan pressure calculation:

About 1300 meters high above the selected fan pressure can be reduced according to the following formula:

Fan pressure P = 101325 / P * P given local

Note: (1) : the fan pressure P - the selected fan pressure P.

(2) : 101325 pa - in temperature 20 ℃, 50 ℃ relative humidity of the air condition. Air density of 1.2 kg/m3.

(3) : P - local fan in the use of the location of the local stress.

(4) : P - given blower fan pressure point to pick.

According to the above formula, the relationship between when we choose the fan, shall specify the location of the use.

Technical personnel for reference and calculate the appropriate fan parameters, select optimal fan model.