Installation Notes; Installation Of The Standard Version - GEM 490 Installation, Operating And Maintenance Instructions For The Installer And The User

11.1

Installation notes

Arrange the bolt holes of the
G
piping and valve in a way that
they
- are symmetrical to the two
main axes
- are not on the two main axes.
Inside diameter of the piping must
G
correspond to the nominal diameter of
the butterfl y valve.
Depending on the nominal size, the
G
diameter of the pipe fl anges should
be between "D max" and "D min".
DN 40 50
D max 43.1 54.5
D min 37 34
DN 150 200
D max 159.3 206.5 260.4 309.7 341.4 392.2
D min 140 192
DN 450 500
D max 442.8 493.8 595.8
D min 421 481
Flange
Flange
490
Main
axis
Main
axis
65 80 100 125
70.3 82.5 107.1 131.7
51 66 93 121
250 300 350 400
242 293 331 381
600 700 800 900
695 795 894
564 661 763 865
ø D min
Butterfly valve
Seat (liner)
ø D max
Type 11 weld neck fl anges to DIN EN 1092
are ideally to be used.
 Installation position, fl ow direction and
fl ow velocities in accordance with chapter
5 "Technical data".
11.2 Installation of the
standard version
Before carrying out any welding on the
G
piping remove the butterfl y valve to
prevent damage to the seat.
1. Shut off plant or plant component.
2. Secure against re-commissioning.
3. Depressurize the plant or plant
component.
4. Completely drain the plant (or plant
component) and let it cool down until
the temperature is below the media
vaporization temperature and scalding
can be ruled out.
5. Correctly decontaminate, rinse and
ventilate the plant or plant component.
6. Check fl ange faces for potential damage!
7. Remove any rough areas (rust, dirt, etc.)
from the pipe fl anges.
8. Suffi ciently spread the pipe fl anges.
9. Do not use any fl ange seals!
10. Clamp the butterfl y valve 1 centred
between pipes with fl anges 2 and 3.
11. Slightly open the butterfl y valve 1. The
disc must not project from the body.
30 / 40
CAUTION
5 4