Nova-Tech LMI Series G - SG Metering Pump - Manual (Page 17)

11
SECTION 3
OPERATION
3.1 INITIAL START-UP
WARNING
FAILURE TO CHECK TORQUE ON NON-
METALLIC HEAD BOLTS PRIOR TO
STARTUP AND AFTER ONE WEEK OF
OPERATION MAY EXPOSE
OPERATING PERSONNEL TO
HAZARDOUS LIQUIDS.
Check the torque on all non-metallic head bolts
prior to startup. Recheck torque on all non-metallic
head bolts after pump has been operating for one
week. Torque the head assembly screws in a
crosswise pattern as follows:
(1) Liquid End Size SG5 and SG6 non-metallic
head bolts to 90 inch pounds.
(2) Liquid End Size SG7 non-metallic head
bolts to 125 inch pounds.
Check that all mounting bolts are tight, piping is
installed properly, and the discharge line is open.
Check oil drain plug for tightness. Remove the oil
fill cap and fill the pump casing until level is
between the markings on the oil fill cap dipstick,
(approximately 3 quarts (2.8 Liters)).
NOTE: The oil furnished with the pump is
grade AGMA No. 5 EP with a viscosity of 1000
SSU at 100°F (218.4 cSt at 40°C). For opera-
tion in ambient temperatures below 50°F
(10°C), substitute AGMA No. 2 EP with a vis-
cosity of 400 SSU at 100°F (86.4 cSt at 40°C).
Manufacturers' equivalent oils are shown
below.NOTE:
ABOVE 50°F
Chevron ................. N.L. Gear Compound 220
Exxon .................... Spartan E.P. 220
Mobil ...................... Mobilgear 630
Texaco ................... Meropa 220
Shell ...................... Omaha 220
BELOW 50°F
Chevron ................. N.L. Gear Compound 68
Exxon .....................Spartan E.P. 68
Mobil ......................Mobilgear 626
Texaco ...................Meropa 68
Shell .......................Omaha 68
BEFORE SWITCHING ON POWER TO
THE PUMP, TURN THE CAPACITY
ADJUSTMENT KNOB TO ZERO. CHECK
THAT ALL SHUT-OFF VALVES IN THE
SUCTION AND DISCHARGE LINES ARE
OPEN BEFORE INCREASING THE
CAPACITY ADJUSTMENT FROM ZERO.
DO NOT TRY TO ADJUST PUMP
CAPACITY BELOW O% OR ABOVE
100% OR DAMAGE TO PUMP MAY
OCCUR. KEEP ADJUSTMENT KNOB
BETWEEN 0 AND 100 %.
Manual Capacity Control
To adjust pump capacity, loosen the stroke locking
knob (320, Figure 7, Sheet 2) located in the pump-
side cover. Pump capacity is adjusted by turning
the micrometer type stroke adjustment knob (330)
clockwise to decrease capacity or counterclock-
wise to increase capacity as required. The adjust-
ment scale is marked in percent (%) of full stroke,
with calibration lines on the knob at 1% intervals.
After adjusting the knob to the desired capacity set-
ting, hand tighten the stroke locking screw to main-
tain the capacity setting.
Filling Pumping System
It is especially important that pump suction and dis-
charge lines be free of entrained air. To ensure this
condition, operate the pump without any discharge
pressure and fill the entire pumping system with liq-
uid before starting pressure tests. A simple method
to assure priming of the pump is to install a tee and
a shut-off valve at the discharge connection of the
pump.