Maintenance | 4-11
e. Insert (1) new Sintered Disk (P/N 301-1713) in the recess in the
Filter Body.
Remove the new Hi-Flow Membrane (comes with attached o-ring,
P/N 301-1714) from its shipping bag and centre it over the o-ring
groove (o-ring side upward). Gently press one side of the o-ring
into the o-ring groove, then repeat on the other side of the o-ring.
Repeat this process on the other sides until the o-ring is complete-
ly in place.
7. Extended Maintenance:
If required, replace the main Sample/Vent Isolation valves and/or the
optional Double Block valves; otherwise, continue with Step 8 to reas-
semble the HAG Probe:
Potentially lethal concentrations of H
2
S and/or other toxic gases are
present in the process stream. Before proceeding, follow all necessary
safety precautions, such as wearing a supply air apparatus.
a. HAG Probe without the optional Double Block valves:
Remove the HAG Probe from the process duct and temporarily
install a flange blind (or cap the threaded connection) while the
Probe is being worked on.
HAG Probe with the optional Double Block valve:
If only replacing the main (upper) Sample/Vent Isolation valves,
close the Double Block valves (lower, T-handle), remove the Sample/
Vent Isolation valves from the Probe. Continue with Step 7-b.
If also replacing the Double Block valves, remove the HAG Probe
(including the Double Block valves) from the process duct and
temporarily install a flange blind (or cap the threaded connection)
while the Probe is being worked on. Continue with Step 7-b.
b. If possible, take the Sample Probe to a shop to work on it.
Remove the (6) M6 x 40 screws that secure the Valve Cover and
Isolation Ball Valves to the Pipe Adapter Assembly.
!
WARNING
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