6
Transport and storage
3
Transport and storage
3.1
Storage
The OME should be stored dry and protected from moisture. The filter elements can ab-
sorb moisture, and the lubrication properties of the oil and hence the end pressure can
be negatively influenced in pumps with an oil return unit.
4
Product description
4.1
Product identification
To correctly identify the product when communicating with Pfeiffer Vacuum, always have
the information from the rating plate available.
●
Model and model number
●
Date of manufacture
Variants
Range of application
The operating fluid return unit operates without auxiliary power and is capable of operat-
ing in the final vacuum range of 800 hPa intake pressure (at 1000 hPa air pressure).
Moreover, its operation is not affected by rotational speed, gas ballast application or built-
up exhaust-side pressure. During dynamic pump-down cycles such as load lock applica-
tions involving small volumes extended pump-down times are to be expected for intake
pressures < 5
·
10
-2
hPa.
Type
Versions
Characteristics
OME 40 M
Standard model
OME 40 MR
Version with operating fluid return
line to the intake side
preinstalled
OME 40 C
Corrosive gas model for pump
model C/MC
●
Sight glass 13 of PCTFE
●
Filter elements 14 of sintered carbon
●
Integral leak rate: < 1 · 10
-7
Pa m
3
/s
OME 40 CR
Corrosive gas model with operat-
ing fluid return line; applicable for
pump model C/MC
●
Sight glass 13 of PCTFE
●
Filter elements 14 of sintered carbon
●
Integral leak rate: < 1 ·10
-7
Pa m
3
/s
