CLIAMS:We claim:

1. A nitrogen and air compressor with multiple compression stages comprising:
a crankcase;
a crankshaft, wherein the crankshaft is connected to the crankcase, wherein the crankshaft comprises a plurality of crank shaft bearings;
a connecting rod, wherein the connecting rod comprises a plurality of connecting rod bearings;
a Gudgeon pin;
a plurality of piston, wherein one piston is provided for one cylinder;
a plurality of cylinders;
a plurality of suction and delivery valves assemblies, wherein one suction and delivery valve is provided for one cylinder assembly;
a plurality of piston ring;
a plurality of scraper rings for a first and a second compression stage;
a flywheel adapter;
a flywheel;
a fan drive assembly;
a fan;
a combination of an air-cooled inter-cooler and after-cooler;
a plurality of purge bottles, wherein the purge bottles act as the moisture separators;
a lubrication system for compressor lubrication;
a condensate drain mechanism, wherein the condensate drain mechanism allows drain separation from the compressed nitrogen or air;
an interconnecting pipeline to connect a plurality of pneumatic components; and
a safety mechanism;
wherein, the nitrogen air compressor is arrangement in a tandem mode.

2. The compressor as claimed in claim 1, wherein the safety mechanism provides a stage wise protection by implementation of pressure relief valves, wherein the safety mechanism provides a last stage protection by implementing a plurality of relief valves and a plurality of pressure switches.

3. The compressor as claimed in claim 1, wherein the cylinders are arranged in a tandem mode to minimize volumetric space.

4. The compressor as claimed in claim 1 has a flow rate capacity range of 10 to 40 .

5. The compressor as claimed in claim 1 has a pressure range handling capacity of 0- 400 .

6. The compressor as claimed in claim 1, wherein the multiple stages comprises first two stages air compressor and three stage nitrogen and air booster compressor.

7. The compressor as claimed in claim 1, wherein the compressor provides compressed air or compressed nitrogen gas, wherein the gas primarily comprises nitrogen, wherein the gas alternatively comprises a group of commercial gases, wherein the group of commercial gases comprises oxygen, methane, carbon dioxide, hydrogen, helium and argon. ,TagSPECI:A) TECHNICAL FIELD OF INVENTION
[001] The present invention generally relates to a mechanical device and particularly relates to a nitrogen-air compressor. The present invention more particularly relates to a nitrogen and air compressor.

B) BACKGROUND OF THE INVENTION
[002] The nitrogen generators and stations are provided as a stationary or a mobile air-to-nitrogen production complex. In advanced economies, the membrane nitrogen plants have almost entirely ousted alternative processes of nitrogen generation in all cases where nitrogen is not required in commercial volumes. There are multiple technologies to provide nitrogen such as pressure swing adsorption technology and membrane technology. These technologies use high efficiency compressors for storage generated nitrogen.
[003] One of the prior arts discloses a high purity nitrogen generator unit comprising a rectification column. In the rectification column, a feed air is separated to oxygen-rich liquid air and nitrogen gas. The oxygen-rich liquid air in its bottom is reduced in pressure by a first expansion valve and sent to a composition regulation column. The nitrogen gas in its top is condensed in a nitrogen condenser, the resulting liquid nitrogen is returned as a reflux liquid to the rectification column and non-condensed gas is released. After oxygen-rich waste gas in the lower part of the composition regulation column is reduced in pressure by an expansion turbine, it is released by way of a first heat exchanger. The mixed gas in the top of the composition regulation column is introduced for recirculation into a first compressor. Another portion of the mixed gas is returned to the composition regulation column by way of a second compressor, second heat exchanger and second expansion valve. The second compressor is driven by means of the expansion turbine. The high purity liquid nitrogen taken out of the vicinity of the top of the rectification column is evaporated for recovery in the second heat exchanger.
[004] Another prior art discloses a compact and/or lightweight and/or portable and/or mechanically non-complex compressor. The compressor is capable of filling an air storage reservoir to pressures of at least 500 psi and most preferably to pressures selected from between at least 0 and 5000 psi.
[005] However, the air and nitrogen compressors mentioned in the prior arts fail to provide a high pressure air or high pressure nitrogen in single unit having compact and tandem configuration air compressor & air and nitrogen booster compressor.
[006] In the view of foregoing, there is a need for air as well as nitrogen gas compressor having high pressure range. Also there is a need for an air as well as Nitrogen gas compressor to provide a compact design in a tandem arrangement mode.
[007] The above mentioned shortcomings, disadvantages and problems are addressed herein, as detailed below.

C) OBJECTS OF THE INVENTION
[008] The primary object of the present invention is to provide a air as well as nitrogen gas compressor with high pressure range.
[009] Another object of the present invention is to provide an air as well as Nitrogen gas compressor with tandem arrangement
[0010] These and other objects and advantages of the embodiments herein will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings.

D) SUMMARY OF THE INVENTION
[0011] The various embodiment of the present invention disclose a nitrogen and air compressor with multiple compression stages. The compressor comprises a crankcase, a crankshaft, a connecting rod, a Gudgeon pin, a plurality of piston, a plurality of cylinders, a plurality of scraper rings for a first and a second compression stage, a flywheel adapter, a flywheel, a fan drive assembly, a fan, a combination of an air-cooled inter-cooler and after-cooler, a plurality of purge bottles, a lubrication system for compressor lubrication, a condensate drain mechanism, an interconnecting pipeline and a safety mechanism. The crankshaft is connected to the crankcase and comprises a plurality of crank shaft bearings. The connecting rod comprises a plurality of connecting rod bearings. The purge bottles act as the moisture separators. The condensate drain mechanism allows drain separation from the compressed nitrogen or air. The interconnecting pipeline connects a plurality of pneumatic components. The nitrogen air compressor is arrangement in a tandem mode.
[0012] According to one embodiment of the present invention, the safety mechanism provides a stage wise protection by implementation of pressure relief valves. The safety mechanism provides a last stage protection by implementing a plurality of relief valves and a plurality of pressure switches
[0013] According to one embodiment of the present invention, the cylinders are arranged in a tandem mode to minimize volumetric space.
[0014] According to one embodiment of the present invention, the compressor has a flow rate capacity range of 10 to 40 According to one embodiment of the present invention, the compressor has a pressure range handling capacity of 0- 400 .
[0015] According to one embodiment of the present invention, the multiple stages comprise first two stages air compressor and three stage nitrogen and air booster compressor in a common assembly.
[0016] According to one embodiment of the present invention, the compressor is provided for air compression & Air or nitrogen gas boosting. The gas primarily comprises nitrogen, wherein the gas alternatively comprises a group of commercial gases. The group of commercial gases comprises oxygen, methane, carbon dioxide, hydrogen, helium and argon.
[0017] These and other aspects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating preferred embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.

E) BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The other objects, features and advantages will occur to those skilled in the art from the following description of the preferred embodiment and the accompanying drawings in which:
[0019] FIG. 1 illustrates a schematic diagram of the nitrogen-air compressor, according to one embodiment of the present invention.

F) DETAILED DESCRIPTION OF DRAWINGS
[0020] FIG. 1 illustrates a schematic diagram of the nitrogen-air compressor, according to one embodiment of the present invention. With respect to FIG. 1, the atmospheric air is drawn through a micronic suction air filter 101 into the first stage two cylinders 102. In the first stage compressors 102, the air is compressed and passed through first stage compressors 102 to the inter-coolers 103. The compressed air is cooled in the inter coolers 103 and moisture is formed on cooling. The formed moisture is collected in a purge bottle 104 and further drained by the automatic drain valves 105. The air from the purge bottle 104 is then admitted to a second stage compressor 102. The air is further compressed in the second stage compressor 102 and then passed through the after-cooler (not shown). The cooled air coming out of the after-cooler is passed through the purge bottle 104, either to first stage of the booster compressor 102 or to the air receiver depending upon requirement of air or nitrogen.
[0021] According to one embodiment of the present invention, in case of an air requirement, the air is boosted to higher pressure in three stages by the booster compressors from second stage air compressor. The booster compressor is common for air as well as nitrogen. These are reciprocating type engine driven boosters. The air passes to the first stage booster compressor for compression from the second stage air compressor. The air passes through a first stage intercooler and purge bottle after leaving the first stage booster compressor and then it is taken to the second stage booster compressor. The air passes through same cycle in second and third stages successively. The air reaches at operating pressure of the compressor unit i.e. up to 400 , after compression and cooling in third stage.
[0022] According to one embodiment of the present invention, in a case of a nitrogen requirement, the air is passes to a nitrogen generator from the second stage air compressor to extract pure nitrogen. The nitrogen is further boosted to higher pressure in three stages by the booster compressor. The nitrogen from the booster compressor is passed through the after-cooler and the purge bottle.
[0023] In the following detailed description, a reference is made to the accompanying drawings that form a part hereof, and in which the specific embodiments that may be practiced is shown by way of illustration. The embodiments are described in sufficient detail to enable those skilled in the art to practice the embodiments and it is to be understood that the logical, mechanical and other changes may be made without departing from the scope of the embodiments. The following detailed description is therefore not to be taken in a limiting sense.

G) ADVANTAGES OF THE INVENTION
[0024] The tandem arrangement of the compressor in present invention provides a compact design. The compressor in the present has capability of compressing an air as well as nitrogen gas.
[0025] It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the claims.