Centrifugal Fans and Blowers Double Inlet Double Inlet, Double Width Fans A range of ten standard models designed specifically for applications where low noise levels are critical. Resiliently mounted low speed motors coupled with large fan outlets provide low air velocities - the main contributor to quiet running fans. For installations where higher rsistances to flow need to be overcome some versions are available with higher speed motors to generate more pressure ^ _^, capability. *f^fThe fans are normally mounted |§5j/^ from their outlet flanges which can ', 1 be for either vertical or horizontal // discharge. " j General Installation Conditions /, Th鉨se fans are suitable for handling ambient tempratures up to 40°C. and should be fitted with the motor shaft horizontal. If this temprature is ^ exceeded there is a risk of the motors overheating and triggering the in-built thermal protection devices. <- The fans must not be used for ' handling explosive, inflammable or corrosive gases, nor sighted in such environments. Typical applications Widely used in air conditioning units, heat recovery, VAV boxes and smaller air handling units. PERFORMANCE DATA Sp驩cifications: Ail models feature multivane impellers manufactured from aluminium or mild steel housed in cases fabricated from mild steel. Permanent capacitor motors have been specified for this range (except the 57FTQR) for their comparative efficiency and better speed & noise control. Outlet flanges with fixing holes for ease of installation are intgral on each model. Whilst the 57FTQR is offered with flying leads for electrical connection the rest of the range have pre-wired capacitors mounted on the fan case side together with a terminal block. 0 100 200 300 400 500 600 700 600 90O 1000 VOLUME FLOW RATE p/aoc) 1100 1200 AIR F LOW SPECIAUSTS IN AIR MOVEMENT TECHNOLOGY SINCE 1955