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SERIES: KM-O(ST) & KM-T(ST)
Operating and maintenance instructions
3.4 ADDITIONAL INFORMATION:
VALVE DISASSEMBLY
Observe the same safety rules as for the pipe system and the
(electrical/pneumatic) supply system/control system.
> (if applicable) Securely interrupt the energy supply
> Open valve and drain pipe section.
WARNING
In completely open/closed position, fluid remains in the
ball valve:
To drain the valve body completely, place ball in
intermediate position directly prior to removal.
> Loosen valve/pipe section connection and disassemble
valve. Make sure that ball surface is bare and free from
damage.
>To store valve, observe section 2.5 (Transport and storage).
3.3 PRESSURE TEST AND COMMISSIONING
INFO
Prior to commissioning, flush the system to remove dirt.
Ensure that ball valve is open during the entire flushing
process; do not operate ball valve until cleaning is finished.
The manufacturer Kugelhahn Müller has already performed
the required tests on every finished valve as per the European
Standard EN 12266.
The following restrictions and notes apply if a pressure test of
the pipe section is required together with the installed ball valve:
> To remove all foreign matter, carefully flush newly installed
pipe systems before closing them for the first time.
> When valve is in open position, the test pressures shall
not exceed the value 1.5 x design pressure (PN or PS) as
per valve marking.
>When ball valve is in closed position, the maximum
test pressure to be applied = 1.1 x (PN or PS).
If the valve is marked with "Class" only, limit the test
pressure [bar] to 0.077 x Class. (PS = maximum permissible
operating pressure)
>If a leakage occurs in a valve, observe the notes in section
4.2 (Troubleshooting).
DANGER
Ball valves have a cavity between ball and valve body in
which small amounts of water collect from the pressure
test:
To remove this water, e.g. by drying the pipe section, the
ball valve must remain in an intermediate position (z.B.
half-open) while the pipe section dries.
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