KQ-251S-501S type rotary type exhaust fan performance tables caliber motor power frequency fan speed air volume (m3 | min) Weight (kg) (mm) (kw) (HZ) (r | min) 0.1kgf | m2 0.12kgf | m2 0.3kgf | m2 0.4kgf | m2 0.5kgf | m2 NW GW KQ-251S 20 0.55 50 450 0.31 0.3 0.29 0.28 0.28 44 51 KQ-30S 25 0.55 50 430 0.35 0.34 0.33 0.32 0.31 50 57 KQ-301S 25 0.75 50 520 0.42 0.42 0.4 0.39 0.38 50 57 KQ-40S 32 0.75 50 500 0.66 0.66 0.63 0.61 0.59 80 88 KQ-401S 32 1.5 50 580 0.8 0.8 0.74 0.71 0.67 85 93 KQ-50S 40 1.5 50 430 1.14 1.14 1.09 1.06 1.02 120 130 KQ -501S 40 2.2 50 500 1.44 1.44 1.39 1.36 1.02 125 135 rotary fan features: 1, small size, air volume, low noise, low energy consumption 2, smooth operation, easy installation 3, anti-load ability, stable air volume 4, with air chamber, bulk gas smooth rotary blower main purposes: 1, water aeration, 2, 3 hospital sewage aeration, vacuum feeder 4 printing industry, domestic sewage, industrial wastewater aeration stirring 5, 6 aquaculture, spray burner, glass industry