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HVAC Fans for Pharmaceutical Clean Rooms

Supply, return and exhaust fans for heating, ventilation and air conditioning of plant and office space. In pharmaceutical clean rooms the gas at the fan is conditioned clean room air, and that sets the blade form, the material and the drive.

The process

Clean rooms hold temperature, humidity, pressure cascade and particle count through air handling units with pre, fine and HEPA filtration. The AHU fan is selected against the filter resistance at end of life, at low noise, with redundancy where the room is critical.

The gas at the fan

Filtered, conditioned supply air through pre, fine and HEPA filters. The fan is selected against the filter pressure drop as it loads, at low noise.

Selection for this duty

Impeller	PAG or die-cast aluminium impeller for low power, fixed or variable pitch
Form	Tube axial for low pressure; vane axial where the pressure or the downstream distribution calls for it; bifurcated where the motor must be out of hot or contaminated air
Density at the fan	At about 22°C the gas density is close to 1.20 kg/m³, 99% of standard air. Pressure developed and power drawn fall in the same ratio, so the selection is made at this density and the motor is checked at cold start.

Supply, return and exhaust fans for heating, ventilation and air conditioning of plant and office space. Low pressure, so efficiency and noise govern. Client-stated blade types for the HVAC in general: Axial, backward inclined and forward curved.

Industries

Chemical & Pharma

Other fans in pharmaceutical clean rooms

AHUVentilation FanFan Silencer

HVAC in other processes

Gas Compressor StationsTobacco Primary ProcessingFood Ovens and FryersPaper Machine Dryer SectionsDyeing and Finishing HousesAutomotive Paint ShopsTyre Plant Mixing and Carbon Black HandlingTyre Curing PressesGenerator and Engine RoomsCar Parks and TunnelsFactory Shed VentilationNuclear Facility VentilationCold Rolling MillsRubber and Plastics CompoundingHospitals and LaboratoriesData Centres and Equipment RoomsSpinning MillsPharmaceutical Coating and GranulationJute Mills

Services on this fan

Fan Energy Audit

Information needed to select or quote

Duty point. Volume flow and static pressure at the fan inlet, with the gas density and temperature or the conditions to derive it.
Operating conditions. Site altitude, normal operating temperature and continuous or intermittent duty.
Gas stream. Dust loading and particle size, corrosive species, moisture, upset temperature and any tendency of the material to deposit on the impeller.
Mechanical. Rotation viewed from the drive end, discharge orientation and motor power.