Powerex SBS1307 User Manual

Powerex • 150 Production Drive • Harrison, OH  45030 • USA

The Powerex Oilless Rotary Scroll Air
Compressor has advanced scroll com-
pressor technology through the devel-
opment of a completely oilless unit.
The Powerex Scroll Compressor offers a
dynamically balanced air end which
insures vibration-free operation. The
rotary design permits a continuous
100% duty cycle. No oil separation, oil
filtration, or inlet valves are required
on the Powerex Scroll unit.

The Powerex oilless rotary scroll air
compressor is based on the theory of
scroll compression. A scroll is a free
standing, intricate spiral bounded on
one side by a solid, flat plane or base. A
scroll set, the basic compression ele-
ment of a scroll compressor, is made up
of two identical spirals which form
right and left hand parts. One of these
scroll components is indexed or phased
180

o

with respect to the other so the

scrolls can mesh. Crescent-shaped gas
pockets are formed and bounded by
the spirals and the base plate of both
scrolls. As the moving scroll is orbited
around the fixed scroll, the pockets
formed by the meshed scrolls follow
the spiral toward the center and dimin-
ish in size. The moving scroll is prevent-
ed from rotating during this process so
the 180

o

phase relationship of the

scrolls is maintained. The compressor’s
inlet is at the outer boundary of the
scrolls.  The compressed gas is dis-
charged through the outlet at the cen-
ter of the fixed scroll so no valves are
needed.

The tip seal on the scroll compressor is
self-lubricated and allows the unit to
operate efficiently without oil and
expensive filtration. The tip seal should
be replaced every 10,000 hours of
operation.

The bearings on the scroll compressor
are regreaseable to allow extended
compressor life. Service should be per-
formed every 10,000 hours of opera-
tion.

Order P/N 91348550 for both the 3 HP
and 5HP units. Change every 2,500
hours or more often in dirty locations.

The hourmeter on the scroll compres-
sor indicates the actual number of
hours the unit has been in operation.
The hourmeter is also used to deter-
mine maintenance and service timing.
An hourmeter must be installed
with every Scroll compressor.

A condensate drain valve must be
installed on any tank used to allow
removal of the liquid which will collect
during compressor operation. 

IN258902AV 9/06

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