Nova-Tech LMI Series G - SD Metering Pump - Manual (Page 12)

ING PLACE. A NOTICE SHOULD BE POSTED
BY THE POWER SWITCH TO WARN THAT
SERVICING IS BEING CARRIED OUT ON THE
EQUIPMENT. SWITCH OFF THE POWER
SUPPLY AS SOON AS ANY FAULT IS DE-
TECTED DURING OPERATION (EXAMPLES:
ABNORMALLY HIGH DRIVE TEMPERATURE,
UNUSUAL NOISE, DIAPHRAGM FAILURE).
2.4 MOUNTING
Support the pump firmly in a level position on a solid,
vibration-free foundation. The pump should preferably
be positioned with the base above floor level to protect
the pump from wash downs and to provide easier ac-
cess for service. Be sure to allow enough space around
the pump for easy access during maintenance opera-
tions and pump adjustments.
The pumps are provided with mounting holes to accom-
modate anchor bolts. Refer to Figure 3 for mounting
hole dimensions.
Pumps installed outdoors should be protected by a shel-
ter.
2.5 DRIP COLLECTION
In the event of a failure of the diaphragm or oil seal bel-
lows, provisions need to be made to contain the pro-
cess fluid or pump oil. This is particularly important
when handling fluids which may be harmful to plant per-
sonnel.
To collect fluid in the event of a diaphragm or oil seal
rupture, (See Figure 1) position a tray under the plain
hole located at the bottom of the liquid end mounting
assembly (5). For SD7 or SD8 pumps, position tray
under tube fitting located at bottom of liquid end mount-
ing assembly. Alternatively, a tube may be installed
onto this tube fitting to drain any leakage to a suitable
container.
2.6 INSTALLATION
Figure 4 displays typical installations (both correct and
incorrect). Figure 5 illustrates the recommended piping
and accessories in a metering pump installation.
As illustrated in the upper right portion of Figure 4, there
must be no swan-necks or stagnant volumes in the suc-
tion line. In this illustration, the loop at the top of the
tank forms an air trap. Eventually, air or gases will bubble
out of solution and accumulate in the trap leading to a
loss of prime condition.
6
Figure 3:
Series G Model D
Dimensional Outline