Rotary Airlocks

Rotary Airlock Valves, often referred as Rotary Airlock/ Rotary Valves, are a type of rotary feeders which are used in a wide range of applications in process industries where there is a need to minimize system air losses while transferring material between vessels with different pressures. These are employed to regulate the material flow from one chamber to another while maintaining a good airlock condition.

They are used to maintain pressure and provide an optimal airlock seal between different product conveying transitions, such as gravity to pneumatic conveying lines. An optimal airlock condition is essential to prevent air pressure loss in high pressure and high temperature conveying systems. Besides this, they are employed to regulate feeding and metering functionality of a standard feeder.

ATS builds a heavier airlock to closer tolerances, which means better sealing properties. Our airlocks are generally chosen for applications where air leakage and gas loss are of high important considerations, even though they are frequently specified for feeder applications because of their ability to withstand stress of heavy-duty feeder applications.

With ATS there are no double standards, all our standard valves are precision machined for close tolerances and minimal eccentricities.

ATS also manufactures large fabricated drop through airlocks, which are built to last for large lumps and high capacities in sizes ranging from 800 dia to 2000 dia. These are fabricated from heavy gauge mild steel plates or any special materials as per client’s technical requirement.

ATS’ Drop through Airlocks are tailor made to user’s specific dimension, with supreme quality and strength, which can last long with low maintenance cost that too at thrifty prices in the market.

Drop Through Airlocks

Drop through airlocks are commonly used in a wide range of applications especially in Kiln Feed Systems/ Preheater Application, with Specific internal design and Material of construct.
They support the application system for handling free flowing, non-abrasive or mild abrasive materials, like cement, limestone powder, raw meal and fine dust below ESP’s; where there is need to minimize system air loss while transferring material between vessels with differing pressures.

They are used as feeder valves to meter the flow of material between vessels with equivalent pressures. You will also find them performing double duty in systems where there is a need to minimize system air or gas loss while regulating the flow of material between vessels at differing pressures.

You can count on us for bringing right solution to your specific needs. ATS airlocks are available in sizes, ranging from 200 dia to 760 dia in cast constructions either in round/ square flange design. They are equipped with inspection door and other special features for easy access for maintenance.

Heavy duty Airlocks with wear resistant liners are provided optionally to serve abrasion duty conditions and high-pressure applications.

Self Cleaning Airlocks

A Feeder that feeds or discharges wet/ Sticky materials like Lignite in power plants, tends to build-up most on the surfaces. This invites frequent maintenance breakdown for cleanup. To avoid such breakdown a preventive self-cleaning mechanism is setup, where in the synchronized cleaning blades sweeps each pocket on every revolution cleaning the residue. This mechanism will ensure consistent and accurate rate of discharge avoiding loss of rated capacity.

Coal Mill / Raw Mill Feeders

These airlock feeders are used for feeding limestone lumps to raw mills, and coal lumps to coal mills in cement industry to avoid false air entering in to the mill thereby decreasing its efficiency. It is designed to pass hot air through the rotor pockets to reduce moisture in the material, thereby avoiding clogging of material in the rotor pockets. It thus helps maintain the capacity.

Steam Jacketed Airlocks

These airlocks are similar to Coal Mill airlocks, but for lower capacities ranging from 35 tph to 60 tph. These airlocks are specially designed to feed lumpy materials like coal, which tend to pack due to moisture thereby jamming a rotor. The housing is of a special design with offset inlet and is jacketed to pass steam to remove moisture from the material being handled. The rotor and adjustable tips are of special design and constructed from highly abrasive resistant materials with spring-loaded inlet to feed it.

Blow Through Airlocks

The blow through airlocks are designed and manufactured to allow products to be introduced into a pneumatic conveying line directly. It gives the user, high efficiency throughput with low-pressure drop in a robust and compact design. These airlocks are suitable for all free flowing materials. All other features are similar to that of Drop through type airlocks.

Bagasse Feeders / Airlocks

Bagasse being a typical material – light, fluffy, fibrous with very high moisture content, demands for a special design than a standard Drop through airlock. The power demand for these airlocks is more than that of other applications.

Side Entry Airlocks

The Side Entry Airlock (SEA) contains offset inlet and outlet ports to reduce product shearing. It is designed to handle extremely hard pelletized or chip material. They are also suitable for applications where small fines produced by the shearing action could cause damage to the system or create hazards. The built-in ‘V’ shaped product inlet reduces the shearing to a single point,virtually eliminating product degradation.