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SITRANS F US SONOFLO
Drilling
SFIDK.PS.029.Y1.02
Step 4
Prepare to drill through the pipe wall with
the hot-tap drill adaptor. At first mount the
ball valve from the lock tool. Make sure
that the valve is open.
Mount the hot-tap drill adaptor on the ball
valve by means of the hook spanners
from the lock tool. Make sure that flat
gaskets and o-rings have been mounted
in the drill adaptor.
Lubricate the drill with oil. Do not use
grease as it can be difficult to flush out
and will pick up drill chips which may
damage the transducer o-ring.
Mount a standard hand-held drilling
machine on the hot-tap drill adaptor. A
drilling machine of 700 – 1000 W is
sufficient. Remember to open the valve
before drilling. Once the drilling is fin-
ished pull the drill back passed the ball
valve. Close the ball valve and demount
the drill adaptor.
It is recommended to open the ball valve
for a moment to flush out possible drill
chips and/or the drill core.
To determine the exact inside diameter
of the pipe, measure the width of the core
(t) with a sliding gauge.
11
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