Types And Description

• Backward inclined, backward curved bladesBackward inclined, backward curved blade is a highly efficient impeller design. Its employed to handle air and also used for gas medium containing lighter amounts of dust particles and at high temperatures. Reinforcements and surface hardening are done for extra strength, if required.
• Backward inclined, flat bladesAn efficient and strong shape, this design is a cost-effective alternative to the backward curved design but with flat blades instead of curved and radial tipped. This results in a slightly lower efficiency, compensated by handling moderate dust particles.
• Backward inclined, forward curved blades Mostly known as radial tipped blades, this design reduces the potential for dust build-up on the underside of the blades in applications with light or moderate amounts of gas-borne dust. Backward inclined, forward curved blade is an intermediate design for volume and pressure.
• Backward inclined, aerofoil bladesAerofoil bladed impellers are most commonly used in applications handling large volumes at low pressures. This highly efficient design of fan is used in clean air or with gases containing small amounts of erosive particles.
• Radial bladesBlades running from hub to impeller tip without any curve or inclination essentially a large paddle wheel. This design results in a relatively inefficient fan with power consumption higher than that using the much more common backward inclined blade.Its mechanical strength and resistance to wear makes the fan to handle applications when high quantities of abrasive dust are present in the gas stream or when very high temperature in the gas is expected.

Configurations

• Single or double inletA double inlet impeller consists of two single inlet impellers back to back on the shaft may or may not sharing a common back plate, providing almost double the flow of a single inlet fan. The selection of a double inlet fan results in a smaller diameter, compact compared to two single inlet fans. Hence a centrifugal fan has a descriptive term as SISW (Single inlet single width) or DIDW (double inlet double width).
• Single or multiple stagesA multi-stage fan consists of two or more impellers mounted on the same shaft. The air or gas flow passes through each one in turn, with a consequent increase in pressure.

Dynamic balancing is an activity of balancing machines by rotating parts quickly and measuring the imbalance using adequate equipment. At Indair, we are extensively accepted as leading service provider of Dynamic Balancing. Large number of clients depends on us for refined output and reduced downtime costs, as we are engaged in utilizing the cutting edge technology to repair all types of unbalanced rotating machineries. With the use of advanced tools and technique we can perform balancing on an assembled machine in a lesser time frame and at a competitive cost.

Multi Vane Damper fitted at the inlet of the fan are used for smooth start up of the fan and pressure control during normal operation. These come with manual and automatic version in various diameters for different capacities. Silencers can be provided to reduce the noise level of the blower.

Indair bag house filters and Wet Scrubber can be used for a variety of applications from bin venting and product reclamation, while providing dependable, long life-cycle, maintenance free performance. These are some of the most efficient and cost effective dust collector models for capture of erosive and non erosive, light and heavy dust particles. When the pollutants are smoke, fume or volatile in nature we use wet scrubber to clean the impure air by scrubbing it with water or necessary solvent. Widely used for flue gas treatments. The design and construction of the scrubber varies with the application and nature of fume. In typical wet scrubber, the polluted gas stream is brought into contact with the scrubbing liquid, by spraying it with the liquid, by forcing it through a pool of liquid, or by some other contact method, so as to remove the pollutants. Special flue gas affinity packing layers are arranged to absorb the impurities. The versatility of wet scrubbers allows them to be built in numerous configurations, all designed to provide good contact between the liquid and polluted gas stream. The design of wet scrubbers or any air pollution control device depends on the industrial process conditions and the nature of the air pollutants involved. Inlet gas characteristics and dust properties (if particles are present) are of primary importance. Some advantages of wet scrubbers over these devices are as follows :

• Wet scrubbers have the ability to handle high temperatures and moisture.
• In wet scrubbers, flue gases are cooled, resulting in smaller overall size of equipment.
• Wet scrubbers can remove both gases and particulate matter.
• Wet scrubbers can neutralize corrosive gases.

A few of the many industries where this product employed :

• Hallmarking centers
• Foundries and steel processing plants.
• Chemical industries
• Galvanizing plants
• Pharmaceuticals plant

They remove odours, smoke and oil mist from your kitchen, which improves indoor air quality and provides hygienic atmosphere for working personnel. They remove oil mist which decreases the furniture and wall cleaning and maintenance work in the kitchen and provides hygienic sight. Thus exhaust fans can serve an important function in your kitchen. ClassificationThe two most common types of fans are axial fans and centrifugal fans. Both available in direct motor driven type and belt driven type. Axial fans move air with blades. Centrifugal fans look like squirrel cages and generally do a better job of moving air than axial fans. Most exhaust systems consist of an exhaust fan, ducting and a pick up hood. Some kitchens have a central exhaust system, in which one fan draws moisture, odours, oil mists from several hoods of the kitchen using a network of ducts. How to Select ExhaustSelecting a fan depends upon

• The size of the kitchen or hall
• Number of burners
• Power availability
• Duct size installed
• Air quality required
• Type of fan preferred

We may assit you for fan selection and duct design Note

• The size of the exhaust fan depends on the size of your kitchen. Power required for the fan depends upon the size of the fan.
• The duct should be made for minimum loss which improves the fan capacity.
• Duct balancing is mandatory for system efficiency.

Rotary feeders, also known as Rotary Airlocks or Rotary Valves, are commonly used in industrial and agricultural applications as a component in a bulk or specialty material handling system. Rotary feeders are primarily used for discharge of bulk solid material from hoppers/bins, receivers, and cyclones. Components of a rotary feeder include a rotor shaft, housing, head plates, and packing seals and bearings. Rotors have large vanes cast or welded on and are typically driven by electric motors or small engines. The basic use of the rotary airlock feeder is as an airlock transition point, sealing pressurized systems against loss of air or gas while maintaining a flow of material between components with different pressure and suitable for air lock applications ranging from gravity discharge of filters, rotary valves, cyclone dust collectors, and rotary airlock storage devices to precision feeders for dilute phase and continuous dense phase pneumatic convey systems. As a volumetric feeder rotary airlock valves are also widely used as volumetric feeders for metering materials at precise flow rates from bins, hoppers, or silos onto conveying or processing systems. Industries requiring this type include cement, asphalt, chemical, mining, plastics, food, etc. Features & BenefitsWe provide assurance of precise alignment and fast installation when replacing valves.

• Standard models available from 0.5 hp to 5 hp capacities. Customized models and above 5 hp shall be made as per requirement.
• Valve housing casted and ensures superior strength and solidification of housing's metallurgy.
• Precise machined components and housing eliminates axial shaft movement, fouling of rotor which extends maintenance cycles.
• Outboard bearing design protects bearings in high-temperature applications; removes bearings from direct path of damaging contaminants.
• Optimum and large shaft diameter eliminates rotor deflection; reduces rotor tip wear and bearing seal leakage.
• Excellent performance in high-temperature applications up to 750^of.
• Cast iron housing and ms rotor.
• 6 vane rotor with beveled tips and sides.

OPTIONS

• Flush nozzles are arranged for special applications to clean of stuck up materials by flushing with compressed air or solvents without dismantle.
• 304 or 316 cast stainless steel valve housing.
• Chrome plating
• Hardened steel and stainless steel rotor tip
• Shaft seals and wear strips are included to save flanges and eliminate pressure loss.
• 8-vane or 10-vane rotor.

In bag house dust collectors, the dust filled air stream passes through fabric bags that filter the dust particles. With the help of sequential timers and solenoid valves a high-pressure cleaning air most know as pulse jet is blown periodically in the opposite direction of the dust-laden stream through the filter media, to clean the dust sediment layer that would form over the filter surface. This system known as a online pulse jet system. In these dust collectors, cleaning will be done continuously without interrupting the process.