EN
EN-4
80446693 Rev. B
1. INTRODUCTION
1.1 Scope and definitions
This manual provides installation, operation and maintenance
instructions for the
Ingersoll Rand
NX Blowers, which may be
abbreviated to “blowers” in the remainder of this manual. You
must use the blowers as specified in this manual.
Read this manual before you install and operate your blower.
Important safety information is highlighted as WARNING and
CAUTION instructions; you must obey these instructions. The
use of WARNINGS and CAUTIONS is defined below.
WARNING
Warnings are given where failure to observe the
instruction could result in injury or death to people.
Cautions are given where failure to observe the
instruction could result in damage to the equipment,
associated equipment and process.
The identification and rating plate (Figure 1, item 13) provides
specific details about the blower, such as its Item Number and
so on.
The following warning symbols may be fitted to the blower or
associated equipment:
Warning – refer to accompanying
documentation.
Warning – hot surfaces.
Ear defenders must be worn.
The units used throughout this manual conform to the SI
international system of units of measurement.
Equivalent values in imperial units are also included.
1.2 Description
1.2.1 Introduction
Refer to Figure 1.The NX blowers are positive displacement
blowers, which incorporate two three-lobe rotors (8). One
of the rotors is driven by the drive shaft (5).The other rotor is
maintained in the correct phase relation by timing gears.The
timing gears and the bearings on the rotors and drive shaft
are lubricated by oil in the drive end cover (4) and non-drive
end cover (12).
The blowers are supplied in ‘bareshaft’ form. You must
connect your own coupling or belt drive system (see Section
3.6) to the drive shaft (5) in order to operate the blower.
The blowers are available in eight different positions
depending:
Flow direction
Shaft position
Direction of rotation
Refer to Section 2.7 and figure 2 for the Item Numbers of the
different blower versions.
1.2.2 Principle of operation
During operation, the inlet gas stream to be pumped/
compressed enters the blower at the inlet (2).
As the two contra-rotating rotors turn, the inlet gas is trapped in
the chambers formed between the rotors and the blower-body,
and is eventually forced out of the blower at the outlet (3).
1.3 Applications
All of the NX blowers are suitable for pressure or vacuum
operation.
The blowers are suitable for pumping/compressing ambient
air, and non-flammable gases, gas mixtures and dusts.
The blowers are
not
suitable for pumping/compressing
flammable or pyrophoric gases, gas mixtures and dusts.
The materials of construction of the blowers are specified in
Section 2.6. Before you use the blower, you must ensure that
these materials are compatible with the gases and vapours
which you will pump/compress or which may exist in the
external atmosphere.
You must ensure that your blower is suitable for your
application.
If you have any doubts as to the suitability of the blower for
your application, contact your supplier or
Ingersoll Rand
for
advice.
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www.fraserwoods.ca
