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SECTION 2 -- DESCRIPTION
Section 2 -- Description
Introduction
The Centac compressor is a reliable and efficient centrifugal compressor that is designed
to provide oil-free compressed air or nitrogen. Each compressor is fully packaged on a
common fabricated steel baseplate and is equipped with a self-contained lube oil system
and a state-of-the art control panel. Some of the outstanding features and benefits are:
Features
Small rigid baseplate
Mounted control valves
Mounted intercoolers and aftercooler
Baseplate mounted control panel
Fewest electrical hookups
How a compressor works
The Centac compressor is a dynamic centrifugal type compressor. As shown in Figure 2.1,
air enters the compressor through the machine mounted inlet control valve and flows to the
first stage where the impeller (1) imparts velocity to the air. The air proceeds through the
stationary diffuser section (2) that converts velocity to pressure. The built-in intercooler (3)
removes the heat of compression, which improves efficiency. Air then passes through a
stainless steel moisture separator (4) in a low velocity zone to remove condensate.
Entrained moisture in the air is reduced when the air is forced through stainless steel
moisture separators. This sequence repeats in each succeeding stage until the compressor
achieves the desired operating pressure.
Benefits
No special foundation required
Machine mounted
Compact efficient design
Prewired and factory tested
Minimal installation time and cost
1 2
3
Figure 2.1
How a Centac Compressor Works
4
Centac Instruction Manual
2000 Ingersoll-Rand Company
Date of Issue: December, 2003
2.1
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