Rosemount 8732C, Manual

Page: 36 / 126

Rosemount Model 8732C Integral Mount Magnetic Flowmeter System
2-24
Process Leak
Containment As shown in Figure 2-27, the standard configuration divides the
housing into three separate compartments: one for each electrode and
one for the coils. The electrodes are separated from the rest of the
internal components and the coils.
If a damaged liner allows process fluid to migrate behind the electrode
seals, the fluid is contained in the electrode compartment. The sealed
electrode compartment prevents the process fluid from entering the coil
compartment where it would damage the coils and other internal
components.
The electrode compartments are designed to contain the process fluid at
full line pressure. An O-ring sealed cover provides access to each of the
electrode compartments from outside the flowtube; drainports are
provided in each cover for the removal of fluid.
The electrode compartment could contain full line pressure and it must
be depressurized before the cover is removed. Removing the cover
before depressurizing may result in death or serious injury.
If it is necessary to capture any process fluid leakage for fugitive emission
control, connect the appropriate piping to the drainports and provide for
proper disposal as shown in Figure 2-27.
The second configuration uses a completely welded coil housing but does
not provide the separate electrode compartment or external electrode
access of the standard construction. This housing configuration is
identified by a “W1” in the option code of the model number.
Fused Glass
Seal
Sealed Electrode
Compartment
¼–18 NPT
O-ring Seal
Optional:
Use drain port to plumb
to a safe area
870
5-0
0
0
7
A
D
GC
FIGURE 2-27. Sealed Electrode
Compartment–Standard Configuration.
Ground Electrode Port