LEYBOLD 1092791FP, Original Operating Instructions

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300419814_002_C2 - 08/2017 - © Leybold
21
Operation
4 Operation
4.1 Operation
To avoid overloading the motor, do not start the pump more than six times
within one hour.
If frequent starts are needed, the pump should run continuously and be linked
to the vacuum vessel by means of a valve. In that case, regulation will be
made by the valve and not by start/stop of the pump. With the valve closed,
the pump consumes little energy.
The SOGEVAC
®
pump can pump gases and vapours, provided that the gas
ballast valve is installed and open and the pump has reached its operating
temperature.
Pump in operation is hot and some surfaces could reach a temperature
higher than 80°C (176°F). There is a risk of burn by touching. Take note of
warning labels on the pump.
Use ear protection in case of operation at high inlet pressures.
Pumping of non-condensable gases
If the process contains mainly permanent gases, the SOGEVACs can be oper-
ated without gas ballast, provided that the saturation vapor pressure at operat-
ing temperature is not exceeded during compression.
If you do not know the composition of the gases to be pumped, and if you can’t
rule out the possibility of condensation, run the pump with gas ballast valve
open in accordance bellow.
Pumping of condensable gases and vapours - Using gas ballast
The pumps with gas ballast valves are delivered with the gas ballast valve
open.
Standard gas ballast (Cat. No. 951 29) 7 Nm
3
/h
(originally mounted).
This gas ballast correspond to the most important part of applications; it au-
thorizes a water vapor tolerance of:
30 mbar at 50 Hz
40 mbar at 60 Hz
Gas ballast "Big Flow" 18 Nm
3
/h as a variant or accessory
(Cat. No. 951 30).
This kit is intended for the applications where more vapours of condensable
gases could come into the pump. It brings the water vapor tolerance above 50
mbar. (Mounting instructions attached to the kit).
CAUTION