Process Level Technology, Ltd.
MAG-GAGE
®
OPS-001 Revision 6
Page
12
of
30
December 17, 2018
Magnetic Level Gages
Installation, Operation and Maintenance Instructions
Section 2.4.0. - Operation
2.4.1.
INTRODUCTION
It is important that all instructions pertaining to entering magnetic level gages into service be read thoroughly first
before commencing with service operations. Failure to do so may void the warranty by subjecting the gage to a
potential safety hazard.
2.4.2. PROCEDURES
1.
Check that the operating conditions, (temperature, pressure and specific gravity) are within that maximum
rating of the gage. Each gage has a permanent nameplate indicating process specifications, serial number,
tag number, etc. It is critically important to check that the specific gravity of the process media is specified
at the maximum operating conditions.
2.
The gage chamber should be leveled vertically, empty, blocked in and isolated. Check to see that all drain
and vent plugs are in place. Close all vent and drain valves if plugs are not used.
3.
For
standard
gages, install the float by removing the bottom drain flange located at the base of the gage.
The float is marked TOP to insure proper orientation. A spring is attached to the inside of the drain flange
to cushion the float when the vessel is empty. Reinstall the bottom drain blind flange with a new flange
gasket after the float is in place.
4.
For
inverted
gages, remove the top vent blind flange from the gage chamber. Install the float by inserting
a string through the float loop and lower the float into position slowly. Remove the string from the float
and chamber after the float is resting on the bottom of the gage. An auxiliary magnet may be required to
recouple the indicator, (either single follower or flipper indicator), to the internal float.
5.
Reinstall the blind flange with a new gasket. The gage chamber should be isolated with no opening to
atmosphere. Check to see that all drain and vent plugs are securely in place and that any vent and drain
connections are closed.
