Cartridge Valve And O-Ring Replacement - Milton Roy Roytronic A Series Instruction Manual

MAINTENANCE
5.4

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 MSDS 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
1. Carefully depressurize and disconnect the discharge line (see Section 5.1 or 5.2 in this
2. Place the Foot Valve into a container of water or other neutralizing solution. Turn the
If the liquid cannot be pumped due to Liquifram
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
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
26
kit number or contact your local LMI stocking distributor.
™
manual).
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.
replace the worn valve and O-rings. If necessary, carefully loosen stuck valves by pry-
ing side to side using a small screwdriver through the center hole of the valve.
correctly.
™ rupture, carefully disconnect the suction