Coax Quadax Series Manuel d'utilisation - Page 8
Parcourez en ligne ou téléchargez le pdf Manuel d'utilisation pour {nom_de_la_catégorie} Coax Quadax Series. Coax Quadax Series 11 pages. Butterfly valves with actuator
Imprimer la page Flanged butterfly valves are to be centered on the counterflange during installation by
means of the flange screws before the screws are tightened.
Butterfly valves with a short face-to-face dimension partly require screws of a varying
length for the connection to the counterflanges. For the measurements for the flange
Attention
screws please refer to CO-AX planning documentation
Only butterfly valve with weld ends:
The weld ends of the valve have to be flush, level and parallel and of the same
material as the pipes - see type plate of the valve. Opposite weld ends have to fit to
one another in terms of diameter and shape.
Welding cables must not be connected to the valve but to the pipeline.
By professional welding it has to be ensured that neither considerable tensions are
generated in the pipe section or transferred to the valve nor that the butterfly valve is
damaged by heat effect; only temperatures of <300°C measured on the body wall
next to the bearing socket, are permissible.
When welding the valve into the pipeline, the welding process has to be controlled so
that the supplied thermal energy is limited and a distortion of the valve body is
avoided. For example, the weld end should be "crossed" in order to prevent tension
to the valve housing.
Non-compliance with these constructions may lead to a distortion of the valve
Attention
housing. A lasting distortion of
sockets) can render the valve useless.
All butterfly valves:
To the connection of the actuator to the control the manual of the actuator
manufacturer applies.
At the end of the installation an operational check with the signals of the control is to
be performed: the valve has to close and open properly in line with the control
commands. The signals of the position feedback (if in place) must correctly show the
position of the valve.
Discernible malfunctions must be remedied prior to commissioning. See also section
7, <Troubleshooting>.
Incorrectly executed control commands may lead to a risk to life and limbs of
operating staff and cause damage to the pipe system.
Caution
5 Pressure test and commissioning
The pressure test of the valves has already been performed by the manufacturer. For the
pressure test of the pipe section with installed valves, the following should be taken into
consideration:
First thoroughly flush newly installed line systems in order to flood out all foreign substances.
Valve opened: The testing pressure may not exceed the value 1.5 x PS (according to type
plate).
(PS = maximum permissible rated pressure at 20°C).
Valve closed: The testing pressure may not exceed the value 1.1 x PS (according to type
plate).
If any leakage occurs from a valve, please refer to section 7 <Troubleshooting>.
Version January 2011
Operating Instructions Quadax Series Butterfly Valves with Actuator
mm in the seat area (around the bearing
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