LEYBOLD 960702FP, Original Operating Instructions

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300419816_002_C1 - 11/2016 - © Leybold
4 Operation
The SOGEVAC
®
can pump gases and vapors, provided that the gas ballast valve
is installed and
open and the pump has reached its operating temperature.
Contact Leybold for important safety instructions before pumping greater than
atmospheric concentrations of oxygen or other highly reactive gases. The pump
must be degreased, modified, and special inert oil must be used for pumping oxy-
gen. Also ATEX variants are available for pumping explosive gases.
The motor manufacturer guarantees a maximum of 6 starts per hour. To avoid
exceeding 6 starts per hour, run the pump continuously and regulate the vacuum
in your system with a pilot valve.
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.
4.1 Pumping of Non-condensable Gases
If the process contains mainly permanent gases, the SOGEVAC
®
can be operat-
ed 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 with Section 4.2.
4.2 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
®
SV300 FP can be equipped with following types of gas ballasts:
■
Standard gas ballast. This gas ballast corresponds to the most important part
of applications .
■
Gas ballast “big flow” as a variant or accessory is intended for the applications
where more vapours of condensable gases could come into the pump.
■
Gas ballast "small flow" for pumping on applications where only few vapours
are to be pumped and where the ultimate pressure with open gas ballast is
important.
■
Gas ballast with E.M. valve (Part. No. upon request) This kit is intended for
being mounted on pumps on which the gas ballast can be driven by an electro-
magnetic valve applied at 24 VDC.
CAUTION
Operation