Nova-Tech LMI Roytronic Excel Series AD Metering Pump - Manual (Page 27)

27
MAINTENANCE
5.6 FastPrime™ Valve O-Ring Replacement
ALWAYS wear protective clothing, face shield, safety glasses and gloves when performing
any maintenance or replacement on your pump.
Refer to the LMI Metering Pump Price List for the proper Spare Parts Kit or RPM Pro
Pac
™ kit number or contact your local LMI stocking distributor.
1. Be sure the Injection Check Valve is properly installed and is operating. If a shut off
valve has been installed downstream of the Injection Valve, it should be closed.
Be sure your relief tubing is connected to your FastPrime ™ valve and runs back to your solu-
tion drum or tank.
2. Turn the FastPrime ™ Knob one-and-a-half turns counter-clockwise
4. This will de-
pressurize the head. Keep valve open. Carefully remove the return line by gently pulling
tubing and moving it from side to side to gradually back tubing off of the barbed
fitting.
3. Hold return line tubing upright until solution drains back into solution drum or
tank.
4. Using a 3/4" (or 19mm) socket or wrench remove Retaining Nut, and pull out the
entire FastPrime™ Valve assembly. Remove and replace the two small O-rings.
5. Reinsert the FastPrime ™ Valve assembly and retighten the Retaining Nut. Then turn
the FastPrime ™ Knob clockwise
3 to tighten knob to closed position. To avoid dam-
aging the parts, it is important that the flange on the FastPrime™ Valve is flush with
the Retaining Nut prior to reassembly.
Note gap between Flange
and Retaining Nut.
INCORRECT
No gap between Flange
and Retaining Nut.
CORRECT