BUSCH MINK MM 1102 BV, Инструкция по эксплуатации

Страница: 11 / 56

MM 1104, 1144, 1102, 1142 B V ATEX-Version, Gas Tight
0870141675 /
190709
page 11
II 2G IIB3 TX = in the process gas explosive atmosphere
consisting of a mixture with air of flammable substances in the form
of gas likely to occur in normal operation occasionally;
if the process gas contains dust, also if the dust is not combustible,
the use of a special ATEX-inlet air filter (with equipotential bonding)
is required; temperature monitoring is required (resistance
thermometer and temperature-transmitter in standard scope of
delivery);
II 3G IIB3 TX = in the process gas explosive atmosphere consisting
of a mixture with air of flammable substances in the form of gas not
likely to occur in normal operation but, if it does occur, will persist for
a short period only;
if the process gas contains dust, also if the dust is not combustible,
the use of a special ATEX-inlet air filter (with equipotential bonding)
is required; temperature monitoring is required (resistance
thermometer and temperature-transmitter in standard scope of
delivery);
II 3D TX °C = in the process gas explosive atmosphere in the
form of a cloud of combustible dust in air not likely to occur in normal
operation but, if it does occur, will persist for a short period only;
the use of the special ATEX-inlet air filter (with equipotential
bonding) is required;
outside = in this line classification for explosive atmosphere in
the environment of the vacuum pump
II 2G IIB3 TX = in the environment explosive atmosphere
consisting of a mixture with air of flammable substances in the form
of gas, vapour or mist likely to occur in normal operation
occasionally; temperature monitoring is required (resistance
thermometer and temperature-transmitter in standard scope of
delivery); sufficiently qualified ATEX-drive motor is required;
II 3G IIB3 TX °C = in the environment explosive atmosphere
consisting of a mixture with air of flammable substances in the form
of gas, vapour or mist not likely to occur in normal operation but, if it
does occur, will persist for a short period only; temperature
monitoring is required (resistance thermometer and temperature-
transmitter in standard scope of delivery); sufficiently qualified
ATEX-drive motor is required
II 2D TX °C = in the environment explosive atmosphere in the
form of a cloud of combustible dust in air likely to occur in normal
operation occasionally; temperature monitoring is required
(resistance thermometer and temperature-transmitter in standard
scope of delivery); sufficiently qualified ATEX-drive motor is
required;
II 3D TX °C = in the environment explosive atmosphere in the form
of a cloud of combustible dust in air not likely to occur in normal
operation but, if it does occur, will persist for a short period only;
temperature monitoring is required (resistance thermometer and
temperature-transmitter in standard scope of delivery); sufficiently
qualified ATEX-drive motor is required
The vacuum pump is equipped with pressure relief lines (r) between
the pump stage and the gas discharge (q). The pressure relief lines
and shaft seal rings safeguard that no process gases will escape
into the environment of the vacuum pump.
The proper function of the vacuum pump requires ambient pressure
+/-200* hPa (=mbar) to be present at the gas discharge (q) at any
operating point.
*unless specified otherwise on the nameplate of the vacuum pump.
The pressure switch/indicator (optional) is to be integrated into the
system control such that the maintenance of the permitted pressure
range will be monitored. If the pressure gets outside this range the
system control must automatically shut down the vacuum pump.
Standard-version:
The gas shall be free from vapours that would condensate under
the temperature and pressure conditions inside the vacuum
pump.
Version “Aqua”:
The vacuum pump features the corrosion protection coating
CPC and is capable of conveying water vapour (
➔
page 12:
Conveying Condensable Vapours). Conveyance of other
vapours shall be agreed upon with Busch. Conveyance of water
or other liquids in liquid phase increases the power consumption
and shall therefore be avoided (risk of drive overload).
The vacuum pump is thermally suitable for continuous operation
(100 percent duty).
Max. permissible number of startings per hour: 12
The vacuum pump is ultimate pressure proof.
The minimum allowed intake pressure is to be read from the
nameplate of the vacuum pump. By means of process control it must
be made sure that the minimum allowed intake pressure will not be
underrun. Under very restricted conditions (
➔
page 4: Operation
with Vacuum Relief Valve / Ambient Air Valve) the use of a vacuum
relief valve (optional) with inlet air filter and equipotential bonding (if
required) is permitted.
The vacuum pump is not absolutely gas tight. In case of conveying
air in new conditions of the vacuum pump the leakage rate amounts
to 0.1 hPa l/s at 250 mbar suction pressure. Due to illegal pressures
at the gas connections, worn shaft seal rings or clogged pressure
relief lines this leakage rate can rise considerably. Make sure that
the installation space or location is vented such that in case of
conveying media which are dangerous to health no impermissible
accumulation of conveyed media in the environment of the vacuum
pump will occur. The installation space or location must be vented
sufficiently.
The approval for use in potentially explosive atmospheres is
valid for the vacuum pump together with the described
measurement and safety equipment. The approval is void if the
system is altered or if the scheduled maintenance is not
complied with. Maintenance must be performed by specifically
instructed personnel only.
•
Make sure that all provided covers, guards, hoods etc. remain
mounted
•
Make sure that protective devices will not be disabled
•
Make sure that cooling air inlets and outlets will not be covered
or obstructed and that the cooling air flow will not be affected
adversely in any other way
•
Make sure that the installation prerequisites (
➔
page 6:
Installation Prerequisites) are complied with and will remain
complied with, particularly that a sufficient cooling will be
ensured
CAUTION
The vacuum pump emits noise of high intensity in a narrow
band.
Risk of damage to the hearing.
Persons staying in the vicinity of a non noise insulated vacuum
pump over extended periods shall wear ear protection.
CAUTION
During operation the surface of the vacuum pump may reach
temperatures of more than 70 °C.
Risk of burns!
The vacuum pump shall be protected against contact during
operation, it shall cool down prior to a required contact or heat
protection gloves shall be worn.