21
Instruction Manual
4.0 SPARE PARTS REPLACEMENT AND
ROUTINE MAINTENANCE
LMI
®
metering pumps are designed for trouble-free
operation, yet routine maintenance of elastomeric
parts is essential for optimum performance.
This involves replacing the LIQUIFRAM™,
cartridge valves, O-rings, and the injection check
valve spring. LMI
®
recommends replacing these
parts at least once a year; however, frequency will
depend on your particular application.
4.1 DEPRESSURIZING THE DISCHARGE
LINE (FOR PUMPS EQUIPPED WITH
A 4-FV ONLY)
ALWAYS WEAR PROTECTIVE
CLOTHING, FACE SHIELD,
SAFETY GLASSES AND GLOVES WHEN PERFORMING ANY
MAINTENANCE OR REPLACEMENT ON YOUR PUMP.
TO REDUCE THE RISK OF
CHEMICAL SPLASH DURING
DISASSEMBLY OR MAINTENANCE, ALL INSTALLATIONS
SHOULD BE EQUIPPED WITH LINE DEPRESSURIZATION
CAPABILITY. USING LMI
®
’S FOUR-FUNCTION VALVE (4-FV) IS
ONE WAY TO INCLUDE THIS FEATURE.
READ STEPS 1 AND 2 BELOW
BEFORE PROCEEDING.
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 4-FV
AND RUNS BACK TO YOUR SOLUTION DRUM OR TANK.
2. Turn the black knob on the 4-FV 1/8 turn
to the stop. Turn and hold the yellow knob
for a few seconds. The discharge line is
now depressurized. Keep both valve knobs
open until solution drains back down the
discharge tubing into the solution tank or drum.
Then release the yellow knob, and turn the black
knob to its normal position.
4.2 DEPRESSURIZING THE
DISCHARGE LINE (FOR DOUBLE
BALL FASTPRIME™ HEADS ONLY)
ALWAYS WEAR PROTECTIVE
CLOTHING, FACE SHIELD,
SAFETY GLASSES AND GLOVES WHEN PERFORMING ANY
MAINTENANCE OR REPLACEMENT ON YOUR PUMP.
READ STEPS 1 AND 2 BELOW
BEFORE PROCEEDING.
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 SOLUTION
DRUM OR TANK.
2. Turn the FASTPRIME™ knob one-and-a-half
turns counter-clockwise. The discharge line
is now depressurized. Keep valve open until
solution drains back down the discharge tubing
into solution drum or tank. Then turn the knob
clockwise to tighten knob to closed position.
SECTION 4 - MAINTENANCE
