20
Instruction Manual
4. With the unit OFF, unscrew the LIQUIFRAM™
DIAPHRAGM by carefully grasping the outer
edge and turning it counter-clockwise Q.
Discard old Liquifram™. Remove the Adapter
Disk (located behind the LIQUIFRAM™
DIAPHRAGM ) and ensure that the diameter
of the raised section is the same as the
diameter of the replacement LIQUIFRAM™
DIAPHRAGM.
5. Remove Adapter Disk and check condition of the
Shaft Seal. Replace Shaft Seal if necessary.
6. Replace the Adapter Disk so that the drain
hole of the disk is oriented downward and the
mounting holes line up with the mounting holes
of the pump.
BE CAREFUL NOT TO SCRATCH
THE PTFE FACE OF THE NEW
LIQUIFRAM™ DIAPHRAGM.
7. Screw on the new LIQUIFRAM™ DIAPHRAGM
clockwise
P
until turned all the way in. Start the
pump and turn the stroke knob to 100%. Stop
the pump.
8. Remount the pump head using the four (4)
screws and washers. Tighten in a criss-cross
pattern. After one week of operation, recheck
the screws and tighten if necessary and on a
monthly basis thereafter.
4.4 CARTRIDGE VALVE AND O-RING
REPLACEMENT
ALWAYS WEAR PROTECTIVE
CLOTHING, FACE SHIELD,
SAFETY GLASSES AND GLOVES WHEN WORKING ON OR
PERFORMING ANY MAINTENANCE OR REPLACEMENT ON
YOUR PUMP. SEE SDS INFORMATION FROM SOLUTION
SUPPLIER FOR ADDITIONAL PRECAUTIONS.
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. Carefully depressurize and disconnect the
discharge line (
see Section 4.1 or 4.2 in this
manual
).
2. Place the Foot Valve into a container of water
or other neutralizing solution. Turn the pump on
to flush the head assembly. Once the pump has
been flushed, lift the Foot Valve out and continue
to pump to let air into the pump head until pump
is purged of water or neutralizing solution.
NOTE:
If the liquid cannot be pumped due to
LIQUIFRAM™ DIAPHRAGM rupture, carefully
disconnect the suction and discharge tubing
using protective clothing, gloves and face shield.
Remove the four screws and washers from the
head and immerse the head in water or other
neutralizing solution.
Spare part replacement kits include specific
instructions for valve replacement. Please follow
the instructions included with the replacement kit.
3. Carefully disconnect one tubing connection and
fitting at a time, then remove and replace the
worn valve and O-rings. If necessary, carefully
loosen stuck valves by prying side to side using
a small screwdriver through the center hole of
the valve.
NOTE:
Before disassembling the check valves, note
the orientation of the valve.
4. Install new check valves in each location. Ensure
that the cartridges are oriented correctly.
SECTION 4 - MAINTENANCE
