4-12 | Heated Acid Gas Sample Probe (Large Diameter)
c. Remove the Isolation valves (and optional Double Block valves):
HAG Probe without the optional Double Block valves:
i. Remove the Valve Cover and then remove the Isolation valves.
Set aside any parts that will be re-used.
ii. Using an o-ring removal tool, remove the (4) o-rings from the
top and bottom o-ring grooves of the Isolation valve. Take care
to avoid damaging the grooves.
HAG Probe with the optional Double Block valves:
i. Loosen and remove the (2) M5 x 10 screws and eccentric lock-
washers (2 places), and set aside (Figure 4-3).
ii. Remove the (2) valves and discard.
d. Using a soft, non-abrasive cloth, clean the interior chambers and
surfaces of the remaining parts with Isopropanol or a similar aque-
ous, non-abrasive cleaning agent that does not harm
aluminum or stainless steel.
e. Rinse all parts with pharmaceutical grade distilled water and allow
them to air dry.
f. Install the new Isolation valves (Sample/Vent Isolation Valve
Assembly Kit P/N 300-9824 – * See IMPORTANT Note) (and op-
tional Double Block valves, if used):
i. Replace the (4) Aflas o-rings (P/N 300-8719), (2) in each valve
assembly.
* IMPORTANT
Do not use the (4) o-rings (2 per kit) that come with the (2) Sample/
Vent Isolation Valve Assembly Kit P/N 300-9824. Discard these
o-rings and use (4) replacement Aflas o-rings (P/N 300-8719), which
are listed in the “Sample/Vent Isolation Valve Assembly Kit and
Replacement O-Rings (Extended Maintenance Spare Parts)” list
under “Extended Spare Parts” in Chapter 5.
ii. Properly orient each Isolation valve and place it on the Pipe
Adapter Assembly.
iii. Properly orient the Valve Cover and place it over the Isolation
valve. Secure it to the Pipe Adapter Assembly with the (6)
M6 x 40 screws.
NOTE
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