Compressor Features
Figure 1.1: Model WFD551
Corken industrial gas compressors are unique among
compressors their size. Unlike ordinary lubricated gas
compressors, Corken compressors completely isolate
the pressurized gas in the compression chamber from
the crankcase. While piston rings seal the piston tightly
enough for it to do compression work, they do not provide
enough sealing to isolate the compression chamber from
the crankcase. To further seal the compression chamber,
a crosshead/piston rod design with seals around the
piston rod is required.
By utilizing specialized piston-rod sealing systems,
Corken compressors can compress pressurized,
flammable and toxic gases. It is also used to compress
harmless gases where oil-free compression or elevated
suction pressures are required. With a large selection of
design options available, Corken offers the most versatile
line of small gas compressors in the world.
Why Corken Compressors are Special
High-efficiency valves:
Corken valves offer quiet operation and high
durability in oil-free gas applications.
Ductile iron construction:
All cylinders and heads are ductile iron for maximum
thermal shock endurance.
Self-lubricating PTFE piston rings:
Corken provides a variety of state-of-the-art piston
ring designs to provide the most cost-effective
operation of compressors for non-lube service. The
step-cut design provides higher efficiencies during
the entire life of the piston ring.
Positively locked pistons:
Simple piston design allows end clearance to be
precisely set to provide maximum efficiency and
long life.
Self-lubricating piston rod seals:
Seals constructed of PTFE incorporating special
fillers to ensure no oil carry over and maximize
leakage control. Spring loaded seal design self
adjusts to compensate for normal wear.
Nitride-coated piston rods:
Impregnated nitride coating provides superior
corrosion and wear resistance.
Adjustable packing screw:
Ensures maximum sealing capacity during the life of
the packing (T791 and T891 models only).
Cast iron crossheads:
Durable cast iron crossheads provide
superior resistance to corrosion
and galling.
Pressure-lubricated crankcase with filter:
Self-reversing oil pump ensures proper lubrication
regardless of directional rotation to main and
connecting rod bearings. Standard 10-micron filter
ensures long-lasting bearing life.
Lower packing
(V-ring)
Upper packing
(V-ring)
Water jacket
(for cooling packing)
Water cooling
jackets
Distance piece
Barrier
(purge, pad, or vent)
Oil deflector ring
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