Oerlikon 10926, Operating Instructions Manual

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23 GAET02307_002_10 - 06/2008 - © Œrlikon Leybold Vacuum
Operation
Warning
Caution
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 vapo u rs, 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.
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 vapo u rs - Using gas ballast
The pumps with gas ballast valves are delivered with the gas ballast valve
open.
The Sogevac
®
SV200 and SV300 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, 109 31, 950 31,
955 37).
This gas ballast correspond to the most important part of applications; it
authorizes 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 vapo u rs of condensable
gases could come into the pump. It brings the water vap o r tolerance above
50 mbar. (Mounting instructions attached to the kit).
Standard gasballast with E.M. valve (Cat. No. 951 31).
This kit is intended for being mounted on pumps on which the gas ballast
can be driven by an electromagnetic valve applied at 24 VDC 18 W.