TAS250 Roots fan is produced with three-blade type, the main parameters of TAS250 Roots fan are rotational speed of 970~1450r/min; flow rate of 56.3~92.9m³/min; pressure of 98kPa~147kPa. TAS250 fan usually adopts couplings or triangular belt for connection and transmission, in two-stage blower, in order to control the temperature of intake air of the second stage to a certain limit (usually within 40℃), it is necessary to set a cooler in the middle of two stages; in two-stage wet vacuum pump, cooling water is injected into the casing from the inlet of the first stage, along with the airflow from the In the two-stage blower, in order to control the inlet temperature of the second stage within a certain limit (usually within 40℃), it is necessary to set up a cooler in the middle of the two stages; in the two-stage wet vacuum pump, the cooling water is injected into the casing by the air inlet of the first stage, and then discharged from the exhaust port of the second stage along with the airflow.

TAS250S two-stage Roots fan is generally used to transport clean gas, but it is also widely used in metallurgy and smelting, petrochemical, material transportation, heavy media screening, flue gas desulfurization and other industries.