Introduction; Description Of Components; Compressor Unit, Functional Description - Sullair DE-18 Series Operator's Manual And Parts List

4.1 INTRODUCTION

Your DE-18 Series, rotary screw air compressor will
provide you with improved reliability and reduced
maintenance.
Read Section 7 (Maintenance) to keep your com-
pressor in top operating condition. Should any
questions arise which cannot be answered in the
following text, call the Sullair Corporation Service
Department.
Your DE-18 Series compressor package utilizes
a simple to operate yet sophisticated computer-
ized controller. All pertinent use of this device is
covered herein. Carefully familiarize yourself
with it before attempting to operate the machin-
ery.

4.2 DESCRIPTION OF COMPONENTS

The standard package includes a two-stage com-
pressor and gear box assembly, a diesel engine,
driveline system, a control assembly, an inlet air
system, low pressure (LP) and high pressure (HP)
silencing/discharge air systems, air cooling system,
a load/unload control system, an oil lubrication and
cooling system, and a sound attenuating enclosure,
all mounted on a fabricated steel frame.
Air-cooled heat exchangers are used on all models.
An engine-driven fan is used to ventilate the interi-
Figure 4-1 Compressor Inlet System
COMPRESSOR SYSTEMS
or of the sound attenuating enclosure. The con-
troller assembly is easily accessible for servicing
behind a hinged and locked separate enclosure
panel door.
4.3 COMPRESSOR UNIT, FUNCTIONAL DESCRIP-
TION
DE-18 Series compressors feature a two-stage, oil
free, rotary screw design. The rotor profiles and
stators, some of which are protected with anti-cor-
rosion coating, deliver near pulse-free compressed
air to meet your demands. The rotor shafts are
mounted on anti-friction bearings and are sealed by
floating carbon ring/stainless steel cage assem-
blies. Both stages are driven by a common bull
gear and speed optimized individual pinions, and
are precisely mounted to the rigid gear box. Timing
gears synchronize each male/female rotor pair for
contact-free operation.
A gear-type pump, coupled to the main drive shaft,
supplies the required lubricating oil to the gears,
anti-friction bearings and cooling to compressor
jacket. An all-metal tank, integrally mounted to the
compressor, serves as the sump for the lubrication
system.
The compressor/gear box assembly is driven by an
engine via a torsionally soft, flexible shaft coupling.
The engine is mounted to the gear box through a
Section 4
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