The belt-type speed at 370-450 rev / min, using the six-pole or four-pole motor protection grade aluminum IP55 F grade insulation, low speed products relatively low noise. Direct motor has 12 poles 440 major rev / min, 10 pole 560 rev / min, 8 pole 720 rev / min in three, 12-pole motors use up large high-speed fan noise. Belt-type products most power-efficient, economical and durable, Direct-products suitable if oil belt type does not work, there is corrosion on the belt places. FRP flared suction fan blades are mainly six leaves, 7 leaves, 3 leaves, 5 leaf farming radiator fan, fan material mainly die-cast aluminum, plastic (nylon plus fiber), glass and steel three. Different numbers of blades, blade angle, curvature of the blade needs with speed, power and reasonable match, single data can not explain the performance exhaust fan. Centrifugal fan [1] is based on the principle of potential energy is converted to kinetic energy, the use of high-speed rotating impeller gas acceleration, then deceleration, change the flow, so that kinetic energy is converted into potential energy (pressure). In the single-stage centrifugal fan, the gas from entering the axial impeller, changing the gas flow through a radial impeller, diffuser and then enter. In the diffuser in farming fan sales price, the gas flow direction changes caused by deceleration fan wholesale farming, which slow down the action of kinetic energy into pressure energy. Pressure increased mainly in impeller fan culture, followed by the process occurs in the diffuser. In a multi-stage centrifugal fan, and reflux into the next impeller allows airflow, resulting in higher pressure. Aquaculture fan sales price | Lianyungang farming fans | Qingzhou Minhua Qingzhou temperature control equipment supplied by the public Hua thermostat plant. Temperature Control Equipment Factory Qingzhou public Hua (www.minhuawenkong.com) strong, credible, Shandong Weifang fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead China and China Qingzhou temperature control equipment and you hand into the brilliant, for a better future!