4 side mount installation – Orion Instruments Atlas User Manual
Page 5
46-638 Magnetic Liquid Level Indicators
5
1.4
Side Mount Installation
Caution: This instrument is intended for use in Installation
Category II, Pollution Degree 2 locations.
NOTE: Top of gauge nameplates are available as an option.
The MLI nameplate can be used as bottom reference of
the external cage. Install the cage to the vessel with name-
plate at bottom. Isolation valves are recommended for
installation between vessel and external cage. Check to
ensure the external cage is vertical. All piping should be
straight and free of “low spots” or “pockets” so that the
lower liquid connection will drain toward the external
cage. Adjust piping as required.
It is recommended a drain valve be installed in the bottom
flange to allow cleaning and checking level. Close the
isolation valves until start up.
Initial installation of the Magnetic Level Indicator is sim-
ple. Unless otherwise specified, MLIs will be shipped from
the factory fully assembled. All flanges will be torqued to
ANSI specifications. Make sure all process connections
attached to the vessel which the gauge will be mounted to
are vertically level, and flanges, if any are level.
Carefully unpack the MLI and stand it up vertically.
NOTE: Longer units require support of the entire length of the cham-
ber while being lifted in place vertically. This will prevent bow-
ing of the chamber, that could result in glass breakage. Once
the gauge is mounted to the vessel and the liquid level rises
inside the vessel, the gauge will become operational
Isolation valves are recommended, but not required. If
isolation valves are used, care must be used when opening
the valves to prevent a surge of fluid or gases through the
chamber. A surge can cause the float to be propelled to the
far end of the chamber, and float damage could result.
Caution: If for any reason the MLI is pressurized higher than the
maximum pressure indicated on the name tag, the float
inside the chamber is subject to collapsing and causing
float failure.
NOTE: Float is shipped in chamber.