Connecting The High Vacuum Side; Designing Counter Flange; Tbl. 5: Requirements For Fastening The Turbopumps To The Bottom Part - Pfeiffer Vacuum HiPace 800 Operating Instructions Manual

Installation
Required aids
● Hole circle in accordance with the dimensions of the turbopump
● Fixing screws, strength class ≥ 8.8, galvanized
● Washer, DIN EN ISO 7090 or DIN EN ISO 7092
● Mounting plate supplied by the customer
Required tools
● Allen key, WAF 6
● Wrench, alternative for DIN 933 hexagon head screws
● Calibrated torque wrench (tightening factor ≤ 1.6)
Fastening turbopump to bottom part
1. Remove existing plastic plugs from the pump bottom part.
2. Place the turbopump upright on the mounting plate.
3. Bolt the pump bottom part to the mounting plate with the required number of permissible fixing
Turbopump
HiPace 350
HiPace 400
HiPace 450
HiPace 700
HiPace 800
Tbl. 5:
5.3 Connecting the high vacuum side
5.3.1 Designing counter flange
Risk of damage due to incorrect counter flange design
Unevenness on the operator-side counter flange results in stresses in the vacuum pump housing,
even when properly attached. This can produce leakage or negative changes in running characteris-
tics.
► Adhere to the shape tolerances for the counter flange.
► Observe the maximum flatness deviations over the entire surface.
Parameter
Maximum torque occurring in the event of a burst
Maximum permissible axial load on the high vacuum flange
22/64
screws and washers.
– Observe the specified screw-in depth.
– Observe the permissible tightening torque.
Mounting plate
Minimum thickness |
Tensile strength
3 mm | > 270 MPa
Requirements for fastening the turbopumps to the bottom part
Superstructural parts and fittings on the high vacuum connection
Installing superstructural parts and fittings to the high vacuum connection is the responsibil-
ity of the operating company. The loading capacity of the high vacuum flange is specific for
the turbopump used.
● The total weight of superstructural parts must not exceed the maximum axial values
specified.
● Make sure that all the torques generated if the rotor blocks suddenly, are absorbed by
the system on the operator side and the high vacuum connection.
● Only use the approved mounting kits of Pfeiffer Vacuum for the high vacuum connec-
tion of the turbopump.
Thread Quantity Screw-in
size depth
M8 6 ≥ 1.3 × d
NOTICE
1)
2)
Tightening tor-
que
25 Nm ± 10 %
HiPace 800
4200 Nm
1000 N
(equivalent to 100 kg)