The fans 0.40,0.42,0.45,0.50 four wheels than the structural type DK45 main fan, large selection range, use energy-saving and convenient. Grounding an electric motor casing failures, power line and ground line wrong. 2, motor winding damp, aging or pinout and wiring insulation cover collide. FKCDZ main fan _ Bureau Ventilator (certified) _ main fan by Zibo Blower Factory Co., Ltd. Zibo Blower Factory Co., Ltd. (www.zibo-fengji.com) is an industry leader in Shandong Zibo, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Zibo Blower leadership with the staff warmly welcome all inquiries negotiations to create a better future Zibo Blower.