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GEMÜ R481
10 Installation in piping
NOTICE
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.
23. Match the coloured marking of the liner to the material
(see table):
Material
Code
Colour
EPDM
EL
-
EPDM (drinking
water)
WL
Orange
EPDM white
ML
-
EPDM-HT
TL
Grey
NBR
NL
Blue
FPM
VL
Yellow
Flucast AB/P
FL
Red
10.2 Installation location
1. You can choose the installation position of the GEMÜ
product. If media is contaminated and DN ≥ 300, install
GEMÜ R481 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).
Main axis
Main axis
