- 25 -
Fluid Inspection/Draining
Failure to remove corrosion by-products or particles in your system may
rapidly lower resistivity, clog the particulate filter, and result in damage
to the mechanical seals contained in the units pump.
Because Uninhibited EG contains no corrosion inhibitors, the fluid must be
inspected weekly for visual signs of degradation. New, Uninhibited EG should
be clear and colorless. The fluid should be replaced at the first sign of deviation
from its clear and colorless appearance.
Before changing the fluid, lower the operating temperature of the unit
to prevent injury from contact with the hot temperature fluid. Use
proper fluid handling and disposal techniques.
Drain & Flush Protocol
1. Drain the Thermo NESLAB unit, connection lines, and tool. If necessary,
use system pressure to flush the Thermo NESLAB unit, connection lines, and
tool.
2. Clean new or lightly corroded existing systems (chiller, connection lines,
and tool) with a 1-2% trisodium phosphate solution. Flush with Uninhibited EG
if trisodium phosphate is not available.
3. Repeat if necessary until there are no signs of particles exiting from the
system.
4. Perform a final rinse with your application Uninhibited EG.
5. For extensively corroded existing systems that is beyond self-help, contact
a professional industrial cleaning company, one who has experience in clean-
ing industrial machinery and in performing repairs or replacement of compo-
nents.
Fluid pH
Uninhibited ethylene glycol can become corrosive in as little as three
weeks. This is a function of the temperature, oxygen concentration, and
metals exposed to the fluid.
Uninhibited EG normally has a pH of 5.5 - 8.0,
depending on the specific glycol
manufacturer
. Please refer to your specific manufacturer of Uninhibited EG for
their recommendation for fluid change-out.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
