Filter
Top Products
55
Reference Manual
00809-0100-4444, Rev AC
Section 3: Advanced Installation Details
January 2015
Advanced Installation Details
3.6.3 Process leak containment (Option M2 or M4)
The 8705 is available with process leak containment. The coil housing configuration is a factory
sealed all-welded enclosure with the addition of sealed electrode compartments. The M2/M4
configuration is available for the 8705 only.
8705 with option code M2/M4 - 8705xxxxxxxxM2/M4
This configuration divides the coil housing into separate compartments, one for each electrode
and one for the coils. In the event of a primary seal failure, the fluid is contained in the electrode
compartment. The sealed electrode compartment prevents the process fluid from entering the
coil compartment where it may damage the coils and other internal components. The electrode
compartments are designed to contain the process fluid up to a maximum pressure of 740 psig.
Code M2 - sealed, welded coil housing with separate sealed and welded electrode
compartments (see Figure 3-14).
Code M4 - sealed, welded coil housing with separate sealed and welded electrode
compartments with a threaded port on the electrode tunnel cap, capable of venting
fugitive emissions (see Figure 3-15).
Note
To properly vent process fluid from the electrode compartment to a safe location, additional
piping is required and must be installed by the user. Installation of any associated piping must be
performed in accordance with environmental and hazardous area requirements. In the event of
primary seal failure, the electrode compartment may be pressurized. Use caution when
removing the cap screw.
Figure 3-14. 8705 with M2 Coil Housing Configuration