White Knight AT100, Руководство пользователя, Страница: 8 / 40

Revision 10 7
cycle. These stand tubes are pretty effective, however, they must be
monitored and from time to time the cap may need to be removed to allow the
tube to release liquid and refill with air.

LEAKY LINES: All liquid tubing connectors upstream and downstream from
the pump should be tight and leak proof. But on the inlet side of the pump, a
leak may not be noticed, as if the leak is sufficiently large, the pump will
simply not prime. Select a quality type of liquid connection throughout your
system and make sure that they are installed properly.

BOILING LIQUID: In the event of pumping chemistries at or near their boiling
point, it must be remembered that the boiling temperature of any liquid
reduces under vacuum conditions. As a pump sucks liquid into it, the liquid in
the supply line to the pump is under a vacuum condition. Depending on the
amount of vacuum and the temperature of the liquid, liquid could boil in the
outlet line of the pump when it is not boiling in the tank (or other supply
reservoir). Placing the pump as close as possible to the tank and with as little
vertical lift as possible (the pump being flooded by gravity is ideal) minimizes
boiling in the inlet line. Boiling of the liquid in the inlet line causes a pump to
“race” thereby shortening its life, and in extreme circumstances will cause the
pump not to prime.

FLAMMABLE SOLVENTS: High purity pumps are frequently used to pump
flammable solvents. Any system used to pump flammable solvents should be
properly grounded to avoid ignition by static charge. Where high purity
pumps are constructed from insulative materials (PTFE and PFA) grounding
the pump is not sufficient. A test from River’s Edge on using insulative pumps
to pump flammable liquids indicated that the liquid itself must be grounded
and that other procedures should be followed. A copy of the test is available
from our web site or may be acquired by calling or emailing us at White
Knight. Designs planning the use of any insulative type pump for use with
flammable solvents should only be done by those having proper training and
understanding of the effects of static electricity buildup in such systems.

CLEAN SUPPLY AIR: White Knight (as well as many other high purity air
driven pumps) require the use of CDA (Clean Dry Air) (Solids: No more than
1PPM with size no more than 1.0um Moisture: No more than 1PPM Oils: No
more than 1PPM) or nitrogen. Use of supply air that does not meet these
specifications could result in close tolerance parts of the pump shifting
mechanisms to seize.

ABRASIVE SLURRIES: Pumping of abrasive slurries will shorten the life of
any pump. Pumps are still warranted when used in abrasive applications,
however components that wear with use, will wear faster. Normal wear is not
a condition covered by warranty.