10
Connecting the venting valve
8
Electronic Drive Unit TC 600
42 Venting valve TVF 005
42a Control lead venting valve/TC 600
42b Plug
The maximum pressure at the venting valve is
1.5 bar absolute.
3.6. Connecting The Casing Heating Unit
The attainment of final pressures is accelerated when turbo-
pumps and vacuum chambers are baked out. Baking out is
only practical on pumps with stainless steel casings (TMU
pumps). On account of their aluminium casings, the tempera-
tures attainable on TMH pumps are not high enough. The
heating duration is dependent on the degree of dirt and on the
required final pressure level. The heating duration should be
at least 4 hours.
Where casing heating is involved the
turbopump must be water cooled.
☞
PLEASE NOTE
CAUTION
3.5. Connecting The Venting Valve
The venting valve TVF 005 (accessory) provides automatic
venting in the event of a power failure and switching off.
Fitting the venting valve
➡
Unscrew the venting screw from the venting connection of
the turbopump.
➡
Screw in the venting valve (42) with seal ring.
Electrical connection
➡
Plug control lead (42a) into the connection ”VENT” of the
TC 600 on the turbopump.
The venting mode of the venting valve can be selected via
DCU, HPU or PC (via serial interface RS 485).
The temperature of the high vacuum flange must
not exceed 120 °C.
High temperatures are generated when
turbopumps are heated. There is a danger of
injury from coming into contact with hot parts
even after the casing heating has been switched
off.
Heating sleeve and the pump casing should be
thermally insulated during the installation.
During the heating phase be careful not to come
into contact with the heating sleeve or the pump
casing.
➡
Plug control lead of the casing heating into the connection
”HEAT/TMS” of the TC 600 on the turbopump.
3.7. Connecting The Sealing Gas Valve
To protect the pump, particularly where corrosive or dust pro-
ducing processes are involved, it is necessary to use sealing
gas. For all processes from 50% of the maximum gas load
sealing gas must be used to ensure rotor cooling.
➡
Unscrew the locking screw (9) from the sealing gas
connection of the turbopump.
➡
Screw in the sealing gas valve (66) with seal ring (66a).
➡
For details on adjusting the sealing gas flow refer to the
operating instructions (see “Accessories”).
WARNING
CAUTION
66 66a
9 15
Connecting the sealing gas valve
9
Locking screw sealing gas connection
15 Seal
66 Sealing gas valve
66a Seal ring
