In my previous post,you came to know how single stage reciprocating air compressor works.The working
principle of air compressor is same in all types of reciprocating air compressor.The difference is in stages
of compression,construction,cooling media etc.
This post will give you clear idea of working principle of Double Stage Reciprocating Air Compressaor.

Double stage reciprocating air compressor consist of two cylinders.One is called LOW PRESSURE CYLINDER and another is called HIGH PRESSURE CYLINDER.When piston in low pressure cylinder is at it's outer dead centre (ODC) the weight of air is zero (neglecting clearance volume), as piston moves towards inner dead centre (IDC) pressure falls below atmospheric pressure & suction valves opens due to pressure difference.The fresh air is drawn inside the low pressure
cylinder through air cleaner.This air is further compressed by piston and pressure inside & outside the cylinder is equal, at this point suction valves closed.As piston moves towards ODC compression of air took place and when the pressure of air is in range of 1.5 kg/centimeter square TO 2.5 kg/centimeter square delivery valves opens & this compressed air is then entered into High pressure Cylinder through INTER COOLER.This called as Low Pressure Compression.If suction & discharge stroke took place on both
side of piston then it is called Double Acting Low Pressure Compression.

When air pressure in high pressure cylinder is below to the receiver pressure,suction valves of high pressure cylinder opens & low compressed air from Low Pressure Cylinder drawn into High Pressure Cylinder.As piston moves towards the ODC, this air is further compressed.When air pressure from low pressure cylinder and inside the high pressure cylinder is equal,suction valves closed.Now air is further compressed by piston untill the pressure in the High Pressure Cylinder exceeds that in the receiver & discharge valves opens.This desired high pressure air is then delivered to receiver.Same procedure is repeated in every cycle of operation.

If suction & discharge stroke took place on both side of piston then it is called Double Acting High Pressure
Compression.In Double Stage Reciprocating Air Compressor AIR PRESSURE can be developed in range of 5.5 kg/centimeter square TO 35 kg/centimeter square.

Normally where we required AIR PRESSURE above 7.0 kg/centimeter square & delivery of air above 100
cubic feet/min. this DOUBLE STAGE RECIPROCATING AIR COMPRESSOR is used.This is most common model
used in various plants.

If we required air pressure above 35 kg/centimeter square, this double stage reciprocating air compressor is
not useful.Then what will the solution? interested to know,wait!
Bye till next post.
Prasanna
In my previous post,you came to know how single stage reciprocating air compressor works.The working
principle of air compressor is same in all types of reciprocating air compressor.The difference is in stages
of compression,construction,cooling media etc.
This post will give you clear idea of working principle of Double Stage Reciprocating Air Compressaor.
Double stage reciprocating air compressor consist of two cylinders.One is called LOW PRESSURE CYLINDER
and another is called HIGH PRESSURE CYLINDER.
When piston in low pressure cylinder is at it's outer dead centre (ODC) the weight of air is zero (neglecting
clearance volume), as piston moves towards inner dead centre (IDC) pressure falls below atmospheric
pressure & suction valves opens due to pressure difference.The fresh air is drawn inside the low pressure
cylinder through air cleaner.This air is further compressed by piston and pressure inside & outside the
cylinder is equal, at this point suction valves closed.As piston moves towards ODC compression of air took
place and when the pressure of air is in range of 1.5 kg/centimeter square TO 2.5 kg/centimeter square
delivery valves opens & this compressed air is then entered into High pressure Cylinder through
INTER COOLER.This called as Low Pressure Compression.If suction & discharge stroke took place on both
side of piston then it is called Double Acting Low Pressure Compression.
When air pressure in high pressure cylinder is below to the receiver pressure,suction valves of high pressure
cylinder opens & low compressed air from Low Pressure Cylinder drawn into High Pressure Cylinder.As piston
moves towards the ODC, this air is further compressed.When air pressure from low pressure cylinder and inside
the high pressure cylinder is equal,suction valves closed.Now air is further compressed by piston untill the
pressure in the High Pressure Cylinder exceeds that in the receiver & discharge valves opens.This desired
high pressure air is then delivered to receiver.Same procedure is repeated in every cycle of operation.
If suction & discharge stroke took place on both side of piston then it is called Double Acting High Pressure
Compression.In Double Stage Reciprocating Air Compressor AIR PRESSURE can be developed in range of
5.5 kg/centimeter square TO 35 kg/centimeter square.
Normally where we required AIR PRESSURE above 7.0 kg/centimeter square & delivery of air above 100
cubic feet/min. this DOUBLE STAGE RECIPROCATING AIR COMPRESSOR is used.This is most common model
used in various plants.
If we required air pressure above 35 kg/centimeter square, this double stage reciprocating air compressor is
not useful.Then what will the solution? interested to know,wait!
Bye till next post.
Prasanna
In my previous post,you came to know how single stage reciprocating air compressor works.The working
principle of air compressor is same in all types of reciprocating air compressor.The difference is in stages
of compression,construction,cooling media etc.
This post will give you clear idea of working principle of Double Stage Reciprocating Air Compressaor.
Double stage reciprocating air compressor consist of two cylinders.One is called LOW PRESSURE CYLINDER
and another is called HIGH PRESSURE CYLINDER.
When piston in low pressure cylinder is at it's outer dead centre (ODC) the weight of air is zero (neglecting
clearance volume), as piston moves towards inner dead centre (IDC) pressure falls below atmospheric
pressure & suction valves opens due to pressure difference.The fresh air is drawn inside the low pressure
cylinder through air cleaner.This air is further compressed by piston and pressure inside & outside the
cylinder is equal, at this point suction valves closed.As piston moves towards ODC compression of air took
place and when the pressure of air is in range of 1.5 kg/centimeter square TO 2.5 kg/centimeter square
delivery valves opens & this compressed air is then entered into High pressure Cylinder through
INTER COOLER.This called as Low Pressure Compression.If suction & discharge stroke took place on both
side of piston then it is called Double Acting Low Pressure Compression.
When air pressure in high pressure cylinder is below to the receiver pressure,suction valves of high pressure
cylinder opens & low compressed air from Low Pressure Cylinder drawn into High Pressure Cylinder.As piston
moves towards the ODC, this air is further compressed.When air pressure from low pressure cylinder and inside
the high pressure cylinder is equal,suction valves closed.Now air is further compressed by piston untill the
pressure in the High Pressure Cylinder exceeds that in the receiver & discharge valves opens.This desired
high pressure air is then delivered to receiver.Same procedure is repeated in every cycle of operation.
If suction & discharge stroke took place on both side of piston then it is called Double Acting High Pressure
Compression.In Double Stage Reciprocating Air Compressor AIR PRESSURE can be developed in range of
5.5 kg/centimeter square TO 35 kg/centimeter square.
Normally where we required AIR PRESSURE above 7.0 kg/centimeter square & delivery of air above 100
cubic feet/min. this DOUBLE STAGE RECIPROCATING AIR COMPRESSOR is used.This is most common model
used in various plants.
If we required air pressure above 35 kg/centimeter square, this double stage reciprocating air compressor is
not useful.Then what will the solution? interested to know,wait!

Bye till next post.
Prasanna
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