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GEMÜ ZRSK
11 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.
NOTICE
Tools
▶
The tools required for installation and assembly are not
included in the scope of delivery.
●
Use appropriate, functional and safe tools.
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
11.2 Installation
1. Carry out preparations for installation (see chapter "Pre-
paring for installation").
2. Inspect check valve and O-rings for possible damage be-
fore installation. Check the freedom of movement of the
check valve. Damaged parts must not be installed.
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 5 times the nom-
inal diameter upstream and downstream of the check
valve.
5 x DN
5 x DN
5 x DN
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. Installation with vertical flow is only permissible if the
check valve can open upwards.
9. If the medium flows horizontally through the check valve,
the eye bolt must point upwards.
10. Guide the check valve between the flanges with the eye
bolt. Centring is performed with the outside diameter of
the body against the inside of the flange bolts.
11. Tighten flange bolts to the appropriate torque in a diag-
onal pattern.
Flange bolt torques
Thread
M12
M16
M 20
M24
M27
Torque [Nm]
20
35
60
100
165
