LEYBOLD SOGEVAC SV 200 BR2, Operating Instructions Manual

Page: 23 / 46

23
GA02307_002_C0 - 11/2016 - © Leybold
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 vapors, provided that the gas
ballast valve is installed and open and the pump has reached its operating
temperature.
The pump in function 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
operated without gas ballast, provided that the saturation vapor pressure at
operating 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 vapors - Using gas ballast
The pumps with gas ballast valves are delivered with the gas ballast valve
open.
The SOGEVAC
®
SV200 can be equipped with 3 types of gas ballasts.
Standard gas ballast (Cat. No. 951 29) 7 Nm
3
/h
(originally mounted on Cat. No. 109 27, 950 27, 955 27).
This gas ballast corresponds to the most important part of applications;
it authorizes a water vapour 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 vapour tolerance above
50 mbar. (Mounting instructions attached to the kit).
CAUTION