Product Description | 2
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The machine is intended for the placement in a potentially explosive environment ac-
cording to the data given on the nameplate of the motor and the nameplate of the ma-
chine (NP), see
Explanation of ATEX Classification [
In case Busch delivered the machine without motor and coupling, the following must be
observed:
• In regards to its explosive atmosphere protection class, the motor and the coup-
ling must have at least the same ATEX classification as the machine for the outside
area “Outside (o)”.
• The motor and the coupling do not require an ATEX certification when the ma-
chine ATEX classification corresponds to “Outside (o) No ATEX zone”.
The machine is capable of maintaining ultimate pressure, see
.
The machine is suitable for continuous operation.
Permitted environmental conditions, see
2.3 Start Controls
The machine comes without start controls. The control of the machine is to be provided
in the course of installation.
The machine can be optionally equipped with a starter unit or a variable-frequency drive.
2.4 Standard Features
2.4.1 Thermometer
The thermometer allows a visual display of the cooling water temperature in the cooling
water chamber.
2.4.2 Sealing Systems
The machine is equipped with labyrinth seals on the motor side and suction side.
Other sealing systems are optionally available, see
Sealing systems prevent the process gas going to the bearings chambers.
2.4.3 Barrier Gas System
The barrier gas system allows the supply of compressed air or nitrogen into the motor
side shaft seals in order to improve the sealing efficiency.
2.4.4 Nitrogen Panel
The nitrogen panel fitted to the base frame allows the supply of nitrogen to a number of
different points on the machine.
Each device consists of a pressure regulator and a flow meter to adjust pressure and
volume flow separately.
The following devices are available:
– The barrier gas system for sealing systems on motor side. This device is equipped
with a flow switch integrated to the flow meter to switch off the machine if the ni-
trogen volume flow drops below the minimum set flow value.
With gas lubricated double mechanical seals, the machine must be switched off if the
nitrogen volume flow goes over the maximum set flow value.
Summary of Contents for COBRA ATEX NC 0100-0300 B
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