Vacuum Pump Manufacturers in Ahmedabad, India

The atmospheric air enters the compressor at atmospheric pressure and leaves it as a high pressure at low volume gas . This process can be done by Piston or by Rotary.

All process in indusries can not be done with atmostpheric pressure hence air is required to compress so that process can be been done.

volume of 0.818 m3; or 1 lb of air a volume of 13.07 ft3.

Dew point can be defined as the temperature at which air is fully saturated and below which water will condense.

Compressed Air can be dried by two methods -

Refrigeration:- When the temperature of the air is lowered, its ability to hold moisture is reduced. A refigeration dryer reduces the dewpoint of the air by reducing the temperature of the air, thus separating moisture.
Sorption:- The air stream passes over a bed of granular desiccant which in its active state has a vapour pressure below the vapour pressure of air stream to be dried and therefore physically removes the moisture from the air stream. Sorption can be classified into Absorption and Adsorption.
Absorption:- Absorption systems use a desiccant that dissolves with the absorbed moisture. The desiccant cannot be regenerated.
Absorption:- Adsorption dryers operate by passing compressed air through a bed of desiccant material, to which the water vapour is adsorbed.. These desiccants once saturated can be regenerated and reused.

Hot, moist air enters the refrigeration dryer through an air to air heat exchanger, where the temperature of the inlet air is reduced. This cooled air now passes through a refrigerant to air to air heat exchanger where the tempe¬rature of the air is reduced to between 2° to 5°C The cooling induces condensation and the liquid water is removed in a liquid seprator. The dry air now goes out of the dryer through the air to air heat exchange where the temperature of the air is increased to slightly below the incoming air. This is a continuous process.

The dewpoint cannot go below 2°C PDP.

There are several different types of regenerative dryers but they all conform to the same basic concept. A regenerative dryer consists of two towers filled with the desiccant. The desiccant in one bed is on stream, drying the air, while the desiccant in the other tower is being regenerated. The two towers are interlinked with switching valves so that when the desiccant in the drying tower is saturated, the valves switch the flow into the tower that has just been regenerated. This switching operation is automatic giving conti¬nuous drying.

With an adsorption dryer, very low dewpoint, down to -40°C or -60°C can be achieved.