Installation - Gemü R91 Betriebsanleitung

9 Installation in piping
1. Ensure the product is suitable for the relevant application.
2. Check the technical data of the product and the materials.
3. Keep appropriate tools ready.
4. Wear appropriate protective gear, as specified in the plant
operator's guidelines.
5. Observe appropriate regulations for connections.
6. Have installation work carried out by trained personnel.
7. Shut off plant or plant component.
8. Secure plant or plant component against recommission-
ing.
9. Depressurize the plant or plant component.
10. Completely drain the plant (or plant component) and let it
cool down until the temperature is below the media vapor-
ization temperature and cannot cause scalding.
11. Correctly decontaminate, rinse and ventilate the plant or
plant component.
12. Lay piping so that the product is protected against trans-
verse and bending forces, and also from vibrations and
tension.
13. Only install the product between matching aligned pipes
(see chapters below).
14. Pay attention to the installation position: horizontal or ver-
tical.
15. Pay attention to the direction of the working medium: posi-
tioned in-line with flow direction
GEMÜ R91

9.2 Installation

1. Carry out preparations for installation (see chapter "Pre-
paring for installation").
2. Inspect check valve and suitable gaskets for possible
damage before installation. Check the check valve for
freedom of movement. Damaged parts must not be in-
stalled.
3. Make sure that you only install check valves whose pres-
sure class, chemical resistance, connection and dimen-
sions are appropriate for the conditions of use.
4. Provide a straight pipe section of at least five times the
nominal diameter upstream and downstream of the check
valve.
5. Use flanges to EN1092-1 or EN1092-2 for metal piping.
6. Do not mount directly on a pump flange.
7. Avoid pulsating flow conditions and water hammer.
8. Observe the flow direction of the check valve.
9. Tighten flange bolts to the appropriate torque in a diag-
onal pattern.
Thread
M10
M12
M16
M 20
M24
M27
M30
M33
M36
30 / 40
5 x DN
Flange bolt torques
Torque [Nm]
30
50
130
250
420
600
850
1100
1500
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