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10 Installation in piping
Suitability of the product!
▶ The product must be appropriate for the piping system
operating conditions (medium, medium concentration,
temperature and pressure) and the prevailing ambient
conditions.
1. Ensure the product is suitable for the relevant application.
2. Check the technical data of the product and the materials.
3. The external pressure must not exceed 1 bar PSa.
4. Pressure surges are not permissible. The plant operator
must plan appropriate precautionary measures.
5. The pressure differential must not exceed the maximum
operating pressure.
6. The butterfly valve may only be used with a bonded liner
up to 0.2 bar abs.
7. The plant operator must ensure fire protection is in place.
Regularly service electrical equipment designed for pre-
ventive fire protection in compliance with DIN VDE
0100-610 (IEC/EN 61557).
8. Keep appropriate tools ready.
9. Use appropriate protective gear as specified in plant oper-
ator's guidelines.
10. Observe appropriate regulations for connections.
11. Installation work must be performed by trained personnel.
12. Shut off plant or plant component.
13. Secure the plant or plant component against recommis-
sioning.
14. Depressurize the plant or plant component.
15. Completely drain the plant or plant component and allow it
to cool down until the temperature is below the media va-
porization temperature and cannot cause scalding.
16. Decontaminate, rinse and ventilate the plant or plant com-
ponent properly.
17. Lay piping so that the product is protected against trans-
verse and bending forces, and also from vibrations and
tension.
18. Only install the product between matching aligned pipes
(see following chapters).
19. Please note the flow direction (see chapter "Installation
location").
20. Please note the installation position (see chapter "Installa-
tion location").
21. The valve is not designed for loads caused by earth-
quakes.
22. The plant operator must take into account loads and
torques for the bearing elements.
For valves with a nominal size > DN xx, suitable bearing
elements may need to be used. Design weights and di-
mensions can be found in the datasheets.
GEMÜ R471 Tugela
NOTICE
10.2 Installation location
1. You can choose the installation position of the GEMÜ
product. If media is contaminated and DN ≥ 300, install
GEMÜ R471 horizontally, so that the lower edge of the disc
opens in-line with flow direction.
2. You can choose the flow direction of the GEMÜ product.
3. Arrange the bolt holes of piping and valves so that they
are not on the two main axes (but rather symmetrical to
them).
4. The inside diameter of the piping must match the nominal
diameter of the GEMÜ product.
5. The diameter of the pipe flanges should be, in compliance
with the respective nominal size, between "D max" and "D
min" (see table).
DN
25
40
50
65
80
100
125
150
200
250
300
350
400
450
500
600
22 / 33
Main axis
Main axis
D max
32
13
47
29
60
33
74
53
96
72
113
92
140
118
169
146
223
197
273
247
323
297
363
335
417
384
465
432
518
485
618
580
www.gemu-group.com
D min
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