Pulsafeeder Pulsar Series HypoPump - Manual (Page 11)

7
8. Maintenance
NOTE: This section only refers to models purchased and installed prior to [date] and is for reference
only. Replacement parts are no longer available to retrofit. Converting from the HypoPump
®
to the
HypoPump
®
2 does not have any port-to-port changes. Consult the HypoPump2
®
Addendum for
replacement instructions.
8.1 Automatic Valve Assembly Removal
1. Disconnect the power source to the pump drive motor. If you plan to maintain the AVA itself, remove
power from the AVA unit. For maintenance to the check valves only, the AVA need not be
disconnected.
2. Relieve all pressure from the piping system.
3. Close the inlet and outlet shutoff valves.
4. Take all precautions to prevent environmental and personnel exposure to hazardous materials.
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 AVA 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.
The O-ring seals used in the check valve and AVA are critical to product containment and pump
operation. All o-rings should be inspected carefully and any that show signs of damage or wear should
be replaced. The owner may wish to replace these seals any time the AVA assembly is removed from
the pump.