BUSCH 7180551, Installation And Maintenance Instructions Manual

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Product Description
Page 3
Product Description
The vacuum pump COBRA NC complies with European Directive
2014/34/EU.
The vacuum pump is provided with the following explosion protection
markings:
Inside II 2G Ex h IIB T3 Gb X
Outside No ATEX Zone
Use
The COBRA NC 400 B with the above mentioned certification can be
used for drawing explosive gases and vapour mixtures out of and in
zone 1. It cannot be used in an environment around the pump which is
potentially explosive.
The vacuum pump can, without limitation, draw explosive gases or
vapours of explosion group IIB and temperature class T3. Please also
note the corresponding explosion group protection markings on the
pump and the switch-off temperature settings in the relevant chapters.
The vacuum pump should not be used for the handling of explosive
atmospheres that can auto-destruct or are chemically unstable.
Max. permissible number of startings per hour: 6.
The authorised ambient temperature is situated between -20°C and
+40°C.
The temperature of the drawn gases must be inferior to 100°C.
The maximum authorised back pressure at the exhaust is 100 hPa. If
there is a risk that this back pressure could exceed 100 hPa, a pressure
switch must be installed at the exhaust of the pump, which will stop
the pump as soon as the back pressure exceeds the set value.
The vacuum pump must only be used when its components and
protective coatings are resistant to chemical influences (e.g. corrosion)
during operation, in order to maintain the explosion protection cover.
This is particularly applicable for the safety devices, such as the
temperature sensors and pressure switches.
CL IN OUT
RT BGS OIL
CL CL
OIL
A-side
B-side
OUT
CLD
ODP
OSG
OSG
LS
MP OSG TS ODP
MP
PMR
SA
CLD
TCC
CLO
CLI
OFP BGC BGR GB
CLF EV
IN
OFP
CLI Cooling liquid inlet
CLO Cooling liquid outlet
OFP Oil filler plug
OSG Oil sight glass
ODP Oil drain plug
CLG Cooling liquid sight glass
MP Magnetic plug
EV Expansion vessel
BGC Barrier gas connection
BGR Barrier gas pressure regulator
PMR Plug for manual rotation of rotors
CLF Cooling liquid filler plug
CLD Cooling liquid drain plug
GB Gas ballast
TCC Connection for capillary tube for
thermostatic valve
TS Resistance thermometer
LS Level switch
SA Accelerometer
OFP
CLG
OFP
BGR GB
CLD
ODP
CLD
OSG
MP
ODP
OSG
PMR
CLI
TS
TCC
CLO
BGC
MP
LS
SA
EV
CLF
IN Inlet
OUT Outlet
OIL Oil
CL Cooling liquid
RT Screw rotors
BGS
Barrier gas