Aquaculture fan design reasons: poorly designed, poor dynamic characteristics of forced vibration structure is irrational or self-excited vibration running, stress concentration design speed close to thermal expansion or fall into critical speed calculation allowed, resulting in poor thermal imports blade adjustment, FC (forward multi-blade) fan adjustment feature (after the wing) fans better than BI (backward plate) / AF. Although less efficient than FC fan standalone BI / AF fan, but directly connected suction fan in VAV systems, due to the characteristics of a good FC fan power to reduce both the power consumption is almost the same as the suction fan series, coupled with a small fan FC Lightweight revolutions advantages of low suction fan, making it the VAV system more widely. BI / AF fan because of the size of the weight of the price over FC fans in the same rating occasions, with a high number of revolutions of the shortcomings, it limits its application in small VAV system, but in large and medium load applications, the use of high efficiency still hope The BI / AF-type fan. Suction fan Supply | Minhua Qingzhou temperature control equipment | suction fan is provided by the public Qingzhou Hua thermostat plant. Temperature Control Equipment Factory Qingzhou public Hua (www.minhuawenkong.com) (www.minhuawenkong.com) (www.minhuawenkong.com123) is an industry leader in Shandong Weifang, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation development, the principle of honesty and trustworthiness, and satisfy customer needs. Qingzhou temperature control equipment in China and China leading the staff warmly welcome all inquiries negotiations, China and China Qingzhou temperature control equipment to create a better future. You can also access (www.minhuawenkong.com/supply_details_43600075.html), for more information about the company.