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Section 1
DESCRIPTION
steel canopies are also normally factory-installed.
On water-cooled models (available with a shell and
tube heat exchanger) 24KT coolant fluid is piped
into the four-pass exchanger where compression
heat is removed from the coolant.
On 24KT Series 32 Air-Cooled Models, a fan lo-
cated on top of a specially designed cooler housing
draws air through the cooler to remove the heat of
compression from the cooling fluid.
Both Air-Cooled and Water-Cooled Models provide
easy access to such components as the coolant fil-
ters, control valves, and the air filter. There will be
no problem in gaining access to any components
in the event that they would require service.
1.3 SULLISCREW® COMPRESSOR UNIT, FUNC-
TIONAL DESCRIPTION
The 24KT Sullair Air Compressor features the Sul-
liscrew compressor unit. a single-stage, positive
displacement, flood-lubricated type compressor.
This unit provides continuous pulse-free air com-
pression to meet your needs. With a Sullair ma-
chine, no maintenance or internal inspection of the
compressor unit is required.
24KT coolant fluid is injected into the compressor
unit in large quantities and mixes directly with the
air, as the internal rotors turn compressing the air.
The fluid has three primary functions:
Figure 1-2 Compressor Cooling and Lubrication System Diagram (Air-Cooled Shown)
2
• As a coolant, it controls the rise of air temperature
normally associated with the heat of compression.
• Seals leakage paths between the rotors and sta-
tor and between the rotors themselves.
• Acts as a lubricating film between the rotors, al-
lowing one rotor to directly drive the other, which is
an idler.
After the air and coolant mixture has been dis-
charged from the compressor, the coolant is sepa-
rated from the air. At this time, the air flows to your
service line and the fluid is cooled in preparation for
re-injection.
1.4 COMPRESSOR COOLING AND LUBRICATION
SYSTEM, FUNCTIONAL DESCRIPTION
Refer to Figure 1-2. The 24KT cooling system (wa-
ter-cooled version) consists of a shell and tube heat
exchanger, water-flow regulating valve, main line fil-
ter, extra fine bearing lube filter, thermal valve, flow
control valve and inter connecting piping. Air-
cooled models are schematically the same as wa-
ter-cooled models with the exceptions being a ra-
diator-type cooler and a fan are used in place of the
shell and tube heat exchanger and the water flow
regulating valve.
The pressure in the receiver/sump causes coolant
fluid flow by forcing the coolant from the high pres-
sure area of the sump to an area of lower pressure
in the compressor unit.
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