Tuesday, 30 April 2019

Trustworthy and Qualitative Heatless Air Dryer Manufacturer in India


Trustworthy and Qualitative Heatless Air Dryer Manufacturer in India


Annair Drychill Tech India Pvt Ltd
is well equipped with state-of-the-art assembly facilities, Equipment, Testing facilities, Quality Assurance team for manufacturing products of high standard of reliability and performance. Annair Drychill Tech India Pvt, Ltd Mumbai is a world-class manufacturer, Exporter of Heatless Air Dryer in India and also solution provider for compressed air treatment & industrial cooling.


Annair Drychill Tech India Pvt Ltd is a part of 'Thalakott' group which is established in the year of 2005. Annair is the most trusted brand in India since 2005, with more than 5000 successful installations and satisfied client base in all spectrum of Industries.
Our Heatless Air Dryer is used for instrumentation and process applications as well. Some applications are, CNC machines, CMM machines, Spray-painting, Nitrogen generators, laboratory air and gas applications, powder coating etc.
Heatless Air Dryer main features are:

  • Dew point achieved - 40˚C.
  • Compact and can be mounted on wall.
  • Low power consumption.
  • Lightweight Aluminium construction, no rusting.
  • Specially graded desiccants for optimum performance.
  • Equipped with pre filter & internal post filter.
  • Quality as per ISO 8573.1 class 3.
  • Range from 5 CFM to 100 CFM.
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Monday, 22 April 2019

Regenerative desiccant Air Dryer – (Heated & Heatless)

Desiccant Air Dryer

Air Dryers are used for removing water vapor from compressed air and now they are commonly found in a huge range in commercial and industrial areas. Today in this article we are going to talk about regenerative desiccant Air dryer.

Regenerative desiccant Air dryer or “Heatless Air Dryer” or “Twin tower Air dryer” are used to remove all the water or vapor from compressed air at very low dew point. Regenerative desiccant Air dryer contain a special material known as desiccant (hygroscopic dry agent) which helps to absorb the moisture from compressed air. 
Through a refrigerated Air dryer a compressed air application can filter the proper and require air quality but when compressed air application getting exposed to freezing temperature then it is Regenerative desiccant Air dryer which maintain dew point, save energy and through its desiccant medium remove moisture from the compressed air when a wet air pass through the desiccant medium, which then adsorbs the moisture. Desiccant medium can absorb finite capacity of moisture before it dried out, or regenerated. Desiccant dryers generally construct in twin-tower structure, each tower contain its own desiccant bed because one bed is used to dry compressed air as the second process the undergoes regeneration.

 Advantages of Regenerative Desiccant Type Dryers include:
1.    Regenerative Desiccant can achieve very low dew point without freeze-up.
2.     Regenerative Desiccant maintains the level of purge air.
3.     Regenerative Desiccant is designed to operate pneumatically for remote, hazardous, or mobile work sites.
4.     Regenerative Desiccant filter a compressed air down to-40oC (-40oF).
5.     Regenerative Desiccant maintain the pressure dew point of -70oC (-100oF).
6.     Regenerative Desiccant doesn’t require electrical power for operation.

Types of Regenerative desiccant Air Dryer
1.     Heatless (no internal or external heaters)
2.     Heated (internal or external heaters)


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Wednesday, 27 March 2019

What is water chiller system?

water chiller system


A chiller is a machine that removes heat from a liquid via a vapor-compression or absorption refrigeration cycle. This liquid can then be circulated through a heat exchanger to cool equipment, or another process stream (such as air or process water).

ANNAIR Water Chillers are designed for cooling of process equipments , parts and media in various industries like plastic moulding , PET blowing , CNC machines , water treatment , Packaging machinery etc…

Main Features are

  • Skid mounted, compact & ready to install.
  • Fully automatic with controls of reputed brands.
  • Different options available for cooling module.
  • Liberally sized fan and high efficiency Fin & tube condensers.
  • Stainless steel storage tank and internals are available.
  • Digital temp. indicator for precise operation.
  • High pressure & volume pumps suitable for round the clock operation.

Monday, 4 March 2019

Energy saving in high-pressure reciprocating air compressor


 Air compressors account for a significant amount of electricity usage in Indian industries. The production of compressed air is one of the expensive processes practiced in manufacturing industries. Our major aim in this project is to apply an energy recovery technique and on load reduction technique in high-pressure reciprocating air compressor.



We applied our custom-designed energy recovery techniques and also analyzed the limitation and the risks involved in the proposed technique. In the conventional method, the hot pressurized air coming out of the blow-molding process is emitted into atmosphere, whereas in the proposed model the compressed air is recycled to the compressor receiver; also further energy reduction takes place due to reducing the operating pressure by introducing a pressure-reducing valve (PRV).

The implementation of PRV reduces the loading time by 96 min/day, and energy consumption is reduced by 365.25 units/day.

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Saturday, 23 February 2019

How can you Select An Best Air Compressor

Selecting an Air Compressor

 When it comes to selecting an air compressor it takes time and patience to find the right one to fit your application. There are many factors to consider when purchasing an air compressor and the big two are quality and reliability. Companies cannot afford to see their equipment fail. When machines go down, so does a business. With that in mind it is always important to research all products to find one that is not only reliable, but cost effective as well. When evaluating an air compressor take these components into consideration:
 Airend - Check the packaging thoroughly for engineering data from the Air Dryer Manufacturer. Evaluate the performance and reliability of the machine before making any purchases. For instance, Gardner Denver is a company that has proven their products work well and are very durable.

Cooling Systems - To handle ambient operating temperatures the air compressor's cooling system must always work properly. An air-cooled compressor will have either an integrally mounted or separate oil and air cooler to keep the machine running properly.

Drive - Belt drives are easy to maintain and will provide the most flexibility in pressure selection. With automated belt-tensioning devices the transmission efficiency is ensured and the bearings are protected from excessive stress. Direct drive couples the airend directly to the motor using a coupling.

Controls - The system needs to be easy to operate for the user and just as easy to maintain.

Interconnecting Piping - Selecting an air compressor with rigid piping with flexible connections will ensure there will be no leaks.

Motor - Remember to compare the brake horsepower to nameplate rating. Motors that go well into the service factor are not as reliable.

Selecting the proper air compressor for your application can improve operational efficiency and increase your bottom line. Don't let high air compressor repair cost bring your company to a halt. Long before an air compressor reaches the breaking point, consider preventive maintenance from a local service department.

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Tuesday, 29 January 2019

Types of Compressed Air Dryers

Types of Compressed Air Dryers

In the world of manufacturing, there are three utilities that are considered essential to most processes: water, electricity and natural gas. That said, there is one more utility considered nearly as important as these. Compressed air, is considered the fourth utility in manufacturing

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What Is a Compressed Air Dryer?

A compressed air dryer is a machine that sucks in and significantly reduces the moisture content of ambient air. In manufacturing, air dryers serve the vital role of rendering air more sanitary and conducive for workers and products alike. Depending on the moisture levels of a given environment, the use of a compressed air system can make all the difference between whether or not a production is even achievable. Compressed air dryers can be split into the following categories:
  • Refrigerated drying units:
    • Cycling
    • Non-cycling
  • Desiccant drying units:
  • Heatless
  • Heated — internal or external
The main difference between each dryer type is the agent placed inside the machine to dry the incoming air.

The Refrigerated Dryer

Out of all the compressed air dryers, the refrigerated dryer is the most popular and widespread type. True to its name, the refrigerated air dryer functions in a similar manner to home refrigerators in that a cooling process is employed that prevents moisture. The main difference is the objects or elements being cooled, because whereas a kitchen refrigerator cools and preserves perishable foods and beverages, a refrigerated air dryer maintains the quality of air in manufacturing plants.
In a refrigerated dryer, compressed air is cooled to around 35 degrees Fahrenheit. After the air has passed through the inlet valve, the moisture is extracted and drained, and the newly dried air is reheated by incoming air. At the end of each cycle, the outgoing compressed air has a dew point in the range of 35 to 40 degrees Fahrenheit. Overall, the process of the refrigerated dryer creates a more sanitary working environment that is also far more conducive for manufacturing.

In a non-cycling refrigerated dryer, the refrigerant perpetually circulates within the machine. This allows for quick responses to changes in the load, be it low or high densities of moisture within the incoming air. As such, factory environments with steamy engines can be de-moisturized in much the same way as low-moisture environments. The flow of the refrigerant is regulated with a bypass or unloader valve. In most units, the refrigerant is condensed by a heat exchanger after the compression process has completed a cycle.

CFC refrigerants like R12 and R22 were used in vintage refrigerant air dryers, though times have changed regarding the acceptability of such gases due to concerns over their impact on the environment. Therefore, in newer refrigerant dryers, a different range of chlorine-free refrigerants are used, such as the eco-friendlier R134A and R410A. The change was brought about by the Montreal Protocol, an international, anti-ozone-depletion treaty that was implemented in 1989.


Refrigerant dryers of the cycling variety use refrigerant to cool down a glycol or aluminum mass, which surrounds the air passage. The compressed air is then cooled by a thermostat-controlled heat sink. The advantages of a refrigerant air dryer break down as follows:
  • Advantages of refrigerant dryers in general:
    • Inexpensive to set up
    • Inexpensive to operate
    • Low maintenance costs
    • Resistant to airborne oil particles
  • Disadvantages of refrigerant dryers in general:
    • Minimal dew point capacity
  • Advantages of non-cycling units:
    • Consistent dew point
    • Continual operation
  • Disadvantages of non-cycling units:
    • Don’t conserve energy during low airflow
  • Advantagesof cycling units:
    • Conserve energy during low airflow
  • Disadvantagesof cycling units:
    • Variable dew point
    • Larger and heavier due to heat sink
    • Higher overhead cost

Monday, 14 January 2019

Heatless Desiccant Dryers Overview

Heatless Desiccant Dryer

The Working Principle - Flow Direction

Wet air from the compressor flows UP the tower. This means that gravity will encourage the water, already collected from the air, down the tower and away from the dry desiccant. More water exists at the bottom of the tower than at the top.

A small amount of the dried air, is feed through the purge line DOWNWARDS through the “wet” tower. Water is concentrated at the bottom of the tower due to the direction of the wet air.

The downward direction of the purge air means that the bulk of the water in the tower does not have to pass through the bulk of the desiccant. The moisture only has to travel a short distance before it’s ejected.

Performance Recalculation - A Question

Why is it that you cannot up rate the dryer for inlet temperature below 35°C ?

The Answer:

  • You cannot push more than the nominal flow through the dryer because the pressure drop increases dramatically.
  • Additionally, the speed of the air increases, meaning that the air is in contact with the desiccant for less time, which results in less effective drying and an increased PDP
  • The additional air speed also disrupts the desiccant bead and causes “channels” to be formed - resulting in less effective drying. The extra friction also reduces the desiccant lifetime.
  • Up-rating the dryer for a lower inlet temperature means that after 3 minutes the desiccant bed is saturated as normal. However, the purge air is also cooler than normal, meaning that it has less capacity to hold water. The purge flow (nozzle) is sized based on a purge air temp of 35°C, meaning that if the temperature of the air is only 30°C, it will not have the capacity to dry the desiccant bed. 

Heatless Desiccant Dryer :

Choice Of Desiccant 

Why Use Different Desiccant ?

Different desiccants have different levels of water attraction
The greater the attraction, the better pressure dew point is possible, but the more purge is needed to regenerate the desiccant.
Most desiccant cannot provide a -70°C PDP
Desiccant that can provide a -70°C PDP is more expensive
We don’t want the customer to pay for something that’s not needed

What Desiccant Do We Use in Heatless Desiccant Dryers

For PDP’s of -20 to -40°C PDP Activated Alumina
For PDP’s of -70°C PDP Molecular Sieve
We balance performance with capital investment and ongoing running cost through purge air
For smallest dryers Molecular Sieve is used as due to small amount of desiccant the cost of it is not critical.


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