Air Compressor
Air compressor is four stroke type and well-equipped with motors, electrical panel, motor pulley, belts, and inter stage coolers. Inside this air-compressor, the air is compressed at a pressure of about 40 to 55 Kg/cm2. The rate of compression entirely depends upon the condition and requirement of the plant. It is advisable to use the air-compressor according to the manufacturer's manual, in order to obtain optimum output.

Cooling Towers , Water Softeners And Water Pump
These equipment are supplied according to the instructions of the compressor manufacturer. They also need proper handling and maintenance in order to minimize the compressor shutdown rate and for its uninterrupted functioning.

Skid & MSB
After Cooler
After cooler is basically a cylindrical tank fitted with air coils. Its main functionality is to cool the air (passed through the compressor) by the action of circulating water.

Cascade Cooler
This is an oval shaped tank having air coils. These coils are half submerged in water. Dry nitrogen is bubbled through this water, which becomes wet gas. Water cools during vaporization, and the air inside the pipe also cools.

Moisture Separators
Two moisture separators are provided, among which one is fitted after the After Cooler and the other is installed after the Chilling Tank. As the moisture condenses, the water gets separated and drained, each hour.

Chilling Tank and Chilling Unit
Chilling tank is a cylindrical shaped tank, which is equipped with air and refrigeration coils. The water is cooled with the help of chilling unit and refrigeration coils. In the chilling unit, air is further cooled.

Oil Adsorber
Oil adsorber is full of activated alumina balls. In this unit, the oil vapor carried over by the compressor is removed. It is preferable to drain the moisture from the bottom portion of the oil adsorber at regular intervals. Alumina balls should also be replaced after a specified period of time.

Molecular Seive Driers
These are twin vessel driers that are filled with molecular sieves. The process air becomes dry when it passes through the molecular sieves, as the water-vapor and carbon-di-oxide (CO2) present in that air is filtered by the molecular sieves. The molecular sieves become soaked in every 10 hours, thus require regeneration. They are regenerated with the help of a blow of hot air or nitrogen. This process separates the accumulated CO2 and water-vapor from the molecular sieves and makes them ready to be reused.

Dust Filter
Dust filter, filters the dry air with the help of a special material, thus prevents any dust particles from entering into the Air Separation Unit.

Defrost Heater
Despite all purification and filtration of air, some water-vapor and CO2 managed to escape from the molecular sieve driers and enter the air separation unit. This escaped water-vapor and CO2 may get deposited in the tubes of heat exchangers, valves and L.O. pump filters. Defrost heater is required to remove this accumulated water-vapor and CO2 gas from the air filtration unit and its components. This heater blows a jet of hot air inside the air separation unit to melt down the impurities.

Air Separation Unit
Inside the air separation unit, nitrogen is produced through the chemical processes named liquification and fractional distillation of air. As a result of all the processes that take place inside the air separation unit, oxygen get collected in a condenser while nitrogen is pumped into cylinders at a pressure of 150 kg/cm2.

Expansion Engine
Expansion engine is a single acting reciprocating type engine. The main function of this engine is to maintain the proper temperature required for operating the plant. At the beginning of the downward stroke of the engine, pressurized air enters the engine through an inlet valve and expands. In the upward stroke, the outlet valve opens and the expanded air is pushed outside the engine. Initially, the engine is started with the help of an electric motor, but later on it is run by the air pressure. Due to the cool air present inside, the engine gets cooled during operation, and this temperature drop may range from 50°C to 70°C. The fall in temperature inside the engine depends upon the air-pressure, air-temperature, and inlet cam position.

Liquid Nitrogen Pump
Liquid Nitrogen pump is a single stage, single acting piston pump. This pump is meant for filling liquid nitrogen into the cylinders at a pressure of about 150 kg/cm2. This pump is designed for the assembly of air separation unit.