W 3 1 S E R I E S
H I G H P R E S S U R E B R E A T H I N G A I R C O M P R E S S O R
©ALKIN Kompresör Sanayi ve Ticaret Limited Şirketi
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1.6 Description of Major Components
1.6.1 Major Components – Compressor Unit
Crankcase:
This is the frame that holds everything on it. It contains the oil that lubricates the
system. The cylinders are mounted on it. The crankshaft is inserted into the bearing
housings which is an integral part of the crankcase. There is no maintenance or
repair works that need to be done on this part; it needs to be cleaned inside when
the oil is changed. If there is a visible damage, it should be replaced.
CONSULT THE NEAREST ALKIN DEALER OR ALKIN FOR REPLACEMENT OR
MAINTENANCE.
Crankshaft:
It is overhung type; that means the bearings are on one side, and the crank pin
(where connecting rods are mounted) are on the other side. This unique feature
allows usage of single piece connecting rods which are far more accurate and safe
than split con rods. Large bearings in conjunction with low speeds, allow very long
crankshaft life. Replace this part when life of bearings is over.
CONSULT THE NEAREST ALKIN DEALER OR ALKIN FOR REPLACEMENT OR
MAINTENANCE.
Connecting Rods:
In W31 Series compressors, there are three connecting rods, two of which are the same
and the third one is with a stick at the bottom part serves as the lubricating stick.
Connecting rods move with the rotation of crankshaft and the stick at the bottom of
the connecting rod lubricates the system by moving up & down in the oil. Connecting
Rods have high quality copper-bronze alloy bushings. When these bushings are
abraded, you should replace the connecting rods.
CONSULT THE NEAREST ALKIN DEALER OR ALKIN FOR REPLACEMENT OR
MAINTENANCE.
Cylinders:
They are casted separately and are made of high grade casting materials, machined & honed to fined
tolerances for long service life. The compression cylinders on the 3
rd
stg. is mounted on guide cylinder to
guide the crosshead piston ass’y. However, have the cylinders tested with proper testing equipment in general
overhaul periods and replace them if exceeding the tolerance limits mentioned in parts list or having a visible
fault.
CONSULT THE NEAREST ALKIN DEALER OR ALKIN FOR REPLACEMENT OR
MAINTENANCE.
Valve Complete:
The complete valve consists of valves and up & down covers inside and is located on top of the cylinders.
These complete valves should be maintained periodically and replaced if required. The valves must be
