The belt-type speed at 370-450 rev / min farming fans, with 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 motor fans use up farming Which is good, 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 leaves, blades 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. The main consequence of this reflux export performance generated as follows: First, the exit area can not be fully utilized, the actual amount of wind often can not meet the design requirements. Second, the destruction of breeding uniformity air blower wholesale prices, the impact of the heat transfer performance of the evaporator. Third, the return air collision speed of rotation of the impeller, resulting in aerodynamic noise. Thus, this phenomenon should be avoided. Aquaculture fan manufacturers, Lianyungang farming fans, Qingzhou Minhua Qingzhou temperature control equipment supplied by Chinese citizens thermostat plant. Temperature Control Equipment Factory Qingzhou public Hua (www.minhuawenkong.com) (www.minhuawenkong.com) (www.minhuawenkong.com123) 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! You can also access (www.minhuawenkong.com/supply_details_43896875.html), for more information about the company.