11
4.4. Pumping Off Dry Gases
No special measures are necessary. The gas ballast valve
can remain closed.
4.5. Pumping Off Vapours
To prevent their condensation in the pump,
vapours should only be pumped off with the
pump at operating temperature and the gas bal-
last valve 2 open.
Observe pump water vapour tolerance levels
(see Section 8.0 Technical Data). When the process has been
completed, allow the pump to continue running for approx. 30
minutes for operating medium cleaning purposes.
CAUTION
5. What To Do In Case Of Breakdown?
Problem
Possible Causes
Remedy
Pump doesn't attain final pressure
Pump dirty
Operate pump for a longer period with open
Operating fluid dirty
gasballast valve or change operating fluid
Leak in system
Repair leak
Unusual operating noises
Damaged pump stages
Request repair by PFEIFFER Service
Damaged coupling piece
Request repair by PFEIFFER Service
Oil leaking from the foot of the pump Radial shaft seal defective
Request repair by PFEIFFER Service
Pump doesn't start
Ambient temperature < 12 °C
Warm up pump
Dirty pump stages
Request cleaning by PFEIFFER Service
Damaged pump stages
Request repair by PFEIFFER Service
Further repairs can only be carried out by trained specialists in accordance with Service Instructions.
4.3.3.Magnetic controllable gas
ballast valve
21 Solenoid valve
22 Hose nozzle
23 Double nipple
24 Sealing ring
25 O ring
26 Silencer
27 Sleeve
29 Valve housing
Solenoid valve scheme
stromlos closed
26
24
21
23
22
24
25
27
29
Do not exceed 500 mbar over pressure at
inlet for inert gas at hose nozzle 22.
CAUTION
Assemble solenoid valve reversion kit for gas ballast valve
➡
Push back sliding sleeve of gas ballast valve 2 in standard
version.
➡
Unscrew valve housing 29 from the stand by means of a
pin (Ø 8).
➡
Assemble sleeve 27 and valve housing 29 and screw in the
stand by means of a pin (Ø 8).
➡
Screw in double nipple 23 and solenoid valve as shown in
the illustration.
hole for pin
Ø 8
