Flowserve NRG211-1 Level Probe - Manual (Page 11)

11
Installation
Welding standpipe
Weld standpipe inclined upwards by at least 5 ° onto vertical pipe to ensure that the
standpipe can completely empty if the level falls. Make sure that the marking TOP is
on top. See Fig. 5 on page 21
Danger
n During the welding process and post weld heat treatment of the
standpipe the temperature of the flange seating surface must not
exceed 350 °C.
Note
n We recommend full-penetration butt welding (e. g. type 22 to DIN 2559)
for the connection to pipes (tee pieces) DN
≤
100.
With larger pipes the welding standpipe can be introduced through a
lateral penetration and then be welded.
1. Clean flange seating surfaces.
2. Insert joint ring into the groove of the welding standpipe.
3. Put the probe onto it such that the connector at the terminal box shows to the
bottom.
4. Tighten expansion bolts in diagonally opposite pairs with a torque of 1 70 Nm.
5. Tighten expansion bolts in diagonally opposite pairs with a torque of 130 Nm.
6. Remove the locking screw of the transit protection .
Level probe
I
L
L
E F
Attention
n Handle level probe with care. Avoid subjecting the probe to mechanical
shocks as this might cause damage to the ceramic insulating seal and
consequent leakage.
n Do not lag the body of the electrode above the mounting flange.
n When removing the level probe for inspection work store it in a vertical
position.