Nova-Tech LMI Roytronic Excel Series AD Metering Pump - Manual (Page 25)

25
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
™ kit number or contact your local LMI stocking distributor.
1. Carefully depressurize and disconnect the discharge line (see Section 5.1 or 5.2 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.
*G
UIF
MJRVJE
DBOOPU
CF
QVNQFE
EVF
UP
-JRVJGSBN ™
SVQUVSF

DBSFGVMMZ
EJTDPOOFDU
UIF
TVDUJPO

BOE
EJTDIBSHF
UVCJOH
VTJOH
QSPUFDUJWF
DMPUIJOH

HMPWFT
BOE
GBDF
TIJFME
3FNPWF
UIF
GPVS
TDSFXT

BOE
XBTIFST
GSPN
UIF
IFBE
BOE
JNNFSTF
UIF
IFBE
JO
XBUFS
PS
PUIFS
OFVUSBMJ[JOH
TPMVUJPO

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 pry-
ing side to side using a small screwdriver through the center hole of the valve.
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.