Selection
| Product | Centrifugal Fans |
| Blade types selected | Backward inclined and radial tipped |
| Industries | Iron & Steel, Non Ferrous Metal, Furnaces, Chemical & Pharma, Fertilizer, Glass, Paper, Automobile, Surface Coating, Dyeing Industries, Tyre, Shipbuilding |
Range
The inlet, impeller, volute, shaft and drive accessories work as one assembly. A change in duct resistance shifts the operating point on the fan curve, so a selected duty must state flow, pressure, gas density and speed together. The largest flow and pressure values in the range above are not a simultaneous guaranteed operating point.
In each industry
Iron & Steel
Pig iron and steel plants need fans for the blast furnace stove, the sinter plant, the coke oven and the fume extraction over converters and electric arc furnaces. Combustion air blowers feed the stoves and reheating furnaces. Fume exhaust fans handle hot, dust-laden gas from the melt shop into bag filters. ID fans on the sinter strand and the boiler are built for abrasive dust and high temperature.
Non Ferrous Metal
Ferro alloy, aluminium and copper plants run submerged arc and reverberatory furnaces whose fumes carry fine metallic dust and, in some processes, acid gas. Fume exhaust fans pull the furnace gas into bag filters or wet scrubbers, ID fans handle the boiler and dryer gas, and combustion air blowers serve the furnaces. Stainless steel or lined construction is common on the scrubber side.
Furnaces
Heat treatment, forging and melting furnaces need combustion air blowers sized for the burner pressure, hot air fans for recirculation in the furnace chamber, and exhaust fans on the flue that can live with gas at several hundred degrees. Dilution air blowers bring the flue gas down to a temperature the filter can accept.
Chemical & Pharma
Chemical plants exhaust corrosive fumes from reactors, dryers and storage into wet scrubbers, with fans in stainless steel, PP-FRP or rubber-lined construction. Pharma plants add clean-room supply through AHUs with pre, fine and HEPA filtration, and solvent recovery through adsorption towers. MVR blowers recompress vapour on evaporators and effluent plants.
Fertilizer
Fertilizer plants handle dust from granulators, dryers and coolers, and fumes such as ammonia and fluorides from reactors. Bag filters take the dust, wet scrubbers take the gas, and the fans behind them are built in stainless steel or lined construction. High pressure blowers serve the dryer and cooler drums.
Glass
Glass furnaces need combustion air at steady pressure, cooling air on the furnace structure, and high pressure blowers for forming and annealing. Fume exhaust from the regenerators is hot and carries batch dust, and goes to a bag filter with a dilution air blower ahead of it.
Paper
Paper mills use fans in the dryer section hood (supply and exhaust of hot, humid air), on the boiler (ID, FD), and for fume and dust extraction in the pulp and finishing areas. Stainless steel construction handles the moisture in the hood exhaust.
Automobile
Vehicle plants use fans on paint shop supply and exhaust, on ovens and dryers, on welding fume extraction, and for plant ventilation. Paint booth exhaust goes through wet scrubbers or adsorption towers for solvent; oven exhaust needs a hot air fan; the body shop needs fume extraction into bag filters.
Surface Coating
Painting, powder coating and galvanising lines exhaust solvent vapour, overspray and acid fume. Booth exhaust fans in stainless steel or FRP feed wet scrubbers or adsorption towers, ovens use hot air fans, and pickling tanks need fume extraction with mist eliminators.
Dyeing Industries
Dyeing and textile processing houses use fans on stenters and dryers (hot, humid exhaust), on the boiler, and for shop floor ventilation. Stenter exhaust carries oil mist and lint, so the fan and duct are built for cleaning access.
Tyre
Tyre plants generate carbon black dust in mixing, rubber fume in curing, and heat everywhere. Bag filter fans on the carbon black handling system, fume exhaust on the curing presses, and heavy ventilation across the plant are the main duties.
Shipbuilding
Shipyards need portable and fixed ventilation for confined-space work inside hulls and tanks, welding fume extraction, and exhaust for blasting and painting halls with dust collection and scrubbing.
By process
The same duty, selected for the gas of each process.
Drive and construction
Offered direct mounted on the motor shaft, direct coupled, or belt driven. Material of construction follows the medium and temperature: mild steel, stainless steel, PP-FRP lined, MS FRP lined or MS rubber lined.
Testing and balancing
Performance tested as per IS 4894, BS 848 Part I, or as per customer standards. Rotors are statically and dynamically balanced to grade G 6.3 or G 2.5 as per ISO 21940-11.
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.