Brooks Instrument MT3810 - Manual (Page 54)

4-2
Model MT 3810
Installation and Operation Manual
X-VA-MT3810-eng
Part Number: 541B050AAG
December, 2008
Section 4 Maintenance
There is no routine maintenance required for the Models MT 3810
flowmeters. However should it become necessary to replace, adjust or
remove components of the flowmeter, specific recommendations must
be followed.
4-2 Meter Float Replacement and Cleaning
Float replacement procedures are dependent on the meter size,
connection type and fluid (gas vs. liquid) application. Please refer to the
appropriate section below for instructions along with Figures 4-1, 4-2 and
4-3 for referenced part numbers (#) appearing in parenthesis.
1. Flanged Connection
a. Size 7 (1/2") Flanged Liquid or Gas Service
1. Remove the meter from the process line and lay the meter horizontal
on a table.
2. With a small screwdriver, remove the spiral retaining ring (#1) from the
meter inlet.
3. Push the entire float assembly slowly downward and out of the meter
inlet by pushing from the top with a round bar stock (3/4" or 19 mm
diameter).
4. Remove the float snap-ring to clean individual float assembly parts.
5. Reassemble the meter by reassembling the float assembly and
inserting it into the bottom of the meter. Replace the spiral retaining ring
(#1) in the meter inlet.
b. Size 8 (1/2") Flanged Liquid Service
1. Remove the meter from the process line and lay the meter horizontal
on a table.
2. With small screwdriver remove the spiral retaining ring (#1) from the
meter inlet.
3. Loosen the float assembly with two screwdrivers one on each end of
the meter and turn to loosen the inlet and outlet screws (#2). Remove
inlet screw (#2) at the bottom of the meter.
4. Remove the guide vane (#3) at the bottom of the meter and gently push
the float assembly up and out the top/outlet side.