Welded Steel Crankcase
l Low in weight
l Rapid heat dissipation
l Gas tight and impact proof
l Smooth internal surfaces
guarantee the good oil condition.
Lubrication System & Filter
l Forced lubrication by a gear pump, driven directly by
the crankshaft.
l The pump incorporates a differential pressure regulator to
provide separate pressures for two oil systems: lubrication
system and control oil system.
l Automatically operating hydraulic delay valve ensures
complete unloaded start.
l A metal gauze suction filter element and a throwaway discharge
paper filter cartridges are provided for excellent filtering
capacity of the lubricating oil.
Discharge Valve Assembly
l Three concentric discharge valve rings ensure ample
gas passage at low lifting height.
l The use of sinusoidal springs together with precision
machined and lapped surface results in a trouble-free
operation for a remarkably long time.
l Minimum inventory for spares since most parts are
identical throughout the KC-series compressors.
Cylinder Liner and Suction Valve
l Interchangeable cylinder liners are made of fine-
grained, centrifugally cast, alloy iron.
l Fine boring and honing results in a mirror smooth
running surface.
l A hydraulic mechanical suction valve lifting mechanism
on each individual cylinder achieves loading and unloading.
l For unloading, the suction valve ring is lifted from its seat
in the cylinder collar by spring tension. Admitting controlled
oil pressure to the control piston, allowing the suction valve
ring to descend on its seat effects loading or cylinder.
Crankshaft and Main Bearings
l Bearing surfaces of the high quality nodular cast
iron crankshaft are ground to fine tolerances.
l Main bearings are white metal lined steel backed
bushes, pressed into the cast iron bearing covers.
Intermediate bearing blocks are provided with
split type bearing shell of the same type.
l Each crankshaft is dynamically balanced together
with the counter weights.
Salient Features of Construction
Piston/Connecting Rod Assembly
l Perfect sealing and low oil consumption due to
2 compression & 1-oil scrapper rings and 2 oil rings
on each aluminium piston.
l The nodular iron connecting rod is drilled through for
pressure lubrication of the piston pin
l Steel backed white metal shells on big end and
bronze bearing on small end of connecting rod.
l The complete assembly can be removed from the top
for servicing without withdrawing the cylinder liner
4
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