Nova-Tech LMI Roytronic Excel Series AD Metering Pump - Manual (Page 8)

8
INSTALLATION
CORRECT
3.0 Installation
3.1 Pump Location and Installation
Locate pump in an area convenient to solution tank and electrical supply.
The pump should be accessible for routine maintenance, and should not be operated in
ambient temperatures above 113°F (45°C). If the pump will be exposed to direct sunlight,
LMI black, UV resistant tubing should be installed.
This pump is cord connected and not intended for permanent mounting to a building.
However, temporary mounting to stabilize the pump during operation may be necessary
as long as tools are not required for the installation or removal of the pump.
3.2 Pump Mounting
The pump can be mounted in one of two ways:
A. FLOODED SUCTION (ideal installation); or
B. SUCTION LIFT - when suction lift is less than 5 feet (1.5 m) for solutions having a
specific gravity of water or viscosity of less than 100 cSt (centistokes). For denser or
more viscous solutions, consult distributor.
Note that suction conditions can affect the performance of the pump. This effect is
more pronounced with lower pressure pumps. Consult your distributor for additional
information.
Your LMI metering pump must be mounted so that the suction and discharge valves
are vertical. NEVER position pump head and fittings horizontally.
3.2.1 Flooded Suction
For flooded suction the pump is mounted at the base of the storage tank. This installation
is the most trouble-free, and is recommended for very low outputs, solutions that gasify,
and high-viscosity solutions. Since the suction tubing is filled with solution, priming is
accomplished quickly and the chance of losing prime is reduced. A foot valve is not
necessary in a flooded suction installation.
When pumping downhill or into low or no pressure system, a back pressure/anti-syphon
device should be installed to prevent overpumping or syphoning.
Although popular for all solutions, LMI recommends flooded suction installations for
all high-viscosity fluid applications.
INCORRECT
Avoid this type of false flooded suction.