The fan pressure of sewage treatment, generally by the sewage tank and aeration pipeline required pressure to choose. Commonly used is the Roots blower, the general pressure between 0.3 to 1.0Mpa, you if you are to buy a fan, not only to refer to the wind pressure, but also to test the air volume, is the minimum amount of air required for sewage aeration, otherwise there will be a small part of the gas, the full open will not be enough to use the situation.
You can provide the specifications of the sewage tank, can help you roughly estimate the model.
Xiamen Xiao Zhong