Negative-pressure exhaust fan by CE

Negative-pressure exhaust fan /exhaust fan /cone fan JFD(b )series exhaust fan 1.The outline border adopt advanced automatic process, more accuracy, material adopt zinc coat and zinc plate. 2. The aluminum metal alloy of the high strength hub, adopt aviation aluminum magnesium metal alloy, light weight, high strength,good tensile 3. Switchgear automatically windproof, rainproof and dustproof using heavy punch 4. Double bracing (E style) belt transporter, high performance380V,tri-proof motor 5. strictly quality teat process: noise test, vibration test, concen-tric performance test, fan blade turning speed test, input air tes and vehicle efficiency test