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5. Loosen the suction valve tiebar bolts and shift the suction piping slightly to drain any liquid from the
reagent head cavity. If the piping is closely connected it may be necessary to disconnect a union or
flange.
6. Loosen the tiebar bolts on the discharge valve and shift the piping slightly to drain any liquid.
7. Slide the valve assembly away from the front of the reagent head. Take care to not let the check valve
parts fall out of the bottom of the valve assembly as it is removed from the reagent head.
8. Once the ADV is separated, the discharge check valve components can be removed from the assembly
and cleaned or replaced.
9. Installation is the reverse of the above procedure. Be sure that the oval shaped o-ring on the bottom of
the valve assembly is in the proper position when reinstalling the valve assembly.
10. Troubleshooting Guide
Pump does not
prime (product
side)
Purge relay not operational
Verify power is present at timing relay.
Verify power is present at Valve Solenoid and
there is a clicking noise every 30 seconds.
Check valves fouled or damaged
Clean or replace suction and/or discharge
check valves as per pump IOM.
Check that power is connected to the ADV
Clean or replace Seal Kit.
Check valves fouled or damaged.
Clean or replace suction and/or discharge
check valves as per pump IOM.
Calibration or testing error
Evaluate cause and correct
Clean or replace Seal Kit
Leak detection
port shows
leakage
Verify power is present at Valve Solenoid and
there is a clicking noise every 30 seconds.
Crystallized product in valve assembly
Clean or replace Seal Kit.
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