Pfeiffer Vacuum OKTA 2000 ATEX, Operating Instructions Manual

Page: 18 / 64

Place Measures/safety equipment Category 2 Category 3
Speci-
fica-
tion
We
rec-
om-
mend
Speci-
fica-
tion
We
rec-
om-
mend
Magnetic
coupling
First switch on the roots pump when the back-
ing pump can accept the required amount of
gas
x x
You must observe the volume flow ratio of
≤ 10:1 between the roots pump and backing
pump
x x
Only use the motors specified by Pfeiffer Vac-
uum.
x x
Limitation of the motor torque by:
● frequency converter that limits the permis-
sible torque
or
● soft starter and continuous monitoring of
the power consumption
x x
Piston
bearing
Check the power input of the motor to protect
against bearing damage on the roots pump
(see chapter “Checking the power in-
put”, page 37)
Or:
Regular vibration measurement at the defined
measuring points and required time intervals
x x
Coaxiality
of the cen-
tering of
the flange
to the mo-
tor shaft
Check the coaxiality of the centering of the
flange to the shaft in accordance with standard
EN 50347: 2001, the table values reduced to
50 % are valid
Or:
Regular vibration measurement at the defined
measuring points and required time intervals
x x
Gas outlet
tempera-
ture
Monitor the gas outlet temperature with the
supplied thermometer (see chapter “Setting
and checking the temperature monitor-
ing”, page 30) .
x x
Tbl. 6: Measures and safety equipment
2.5 Limits of use of the product
Installation location ● Indoors, protected against:
─ dust deposits
─ falling objects
─ fire-fighting water
● Outdoors, protected against:
─ falling objects
─ direct influence of weather such as rain, splash
water, strong drafts and sunlight
─ fire-fighting water
─ lightning strike
Installation altitude according to the motor used. Observe the motor manu-
facturer's operating instructions
Ambient temperature,
dependent on the pump design +5°C to +40°C (for P3)
-20°C to +40°C (for H1)
Relative humidity of air max. 85 % (depending on the motor version)
Orientation Horizontal
Pumped medium intake temperature,
max.
process-specific
Permanent intake pressure in circulation
mode
< 1300 hPa (abs.)
Safety
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