GE P&W HP54674 User Manual

OptiSperse* HP54674

Internal Treatment (High Purity Systems)

Fact Sheet

• Outstanding protection against metal oxide

deposition and caustic corrosion

• Designed and field proven for high pressure

boilers

• Cost-effective program cuts downtime and

maintenance

• Provides optimum pH/phosphate control

Description and Use

OptiSperse* HP54674 is an aqueous blend of phos­phate and polymeric dispersants. The product con­tains SCP, a synthetic carboxylated polymer, which
disperses iron and other metal oxides.

OptiSperse HP54674 may be used alone or in com­bination with other OptiSperse HP products, de­pending on the feedwater quality, to provide
optimum pH/phosphate control in high pressure
boilers.

Typical Applications

Hardness is a minor constituent in water of high
purity. The major contaminants are typically iron
and copper oxides. Iron deposits are very porous;
this porosity makes the road to caustic corrosion
possible.

As steam escapes through the chimney-shaped
deposits, dissolved solids concentrate under the
deposit. Hydroxide is the predominant anion. As
such, sodium hydroxide can concentrate under the
deposit to produce caustic levels of 10% or more.
This results in caustic gouging of boiler metal.

neutralizes any free caustic in the boiler water. GE
Water & Process Technologies formulates the so­dium-to-phosphate ratio required to keep your sys­tem within control limits. This combination of
chemical mechanisms provides the most effective
coordinated phosphate/pH control program avail­able. This treatment buffers the boiler water, pre­venting localized pH excursions that lead to
corrosion of boiler metal (Figure 1).

Figure 1: Control diagram for a coordinated phosphate/pH
program.

The other key to GE program effectiveness is our
metal oxide-specific polymeric dispersant technol­ogy. Our tailored treatment approach uses SCP,
synthetic carboxylated polymer, to disperse iron
and other metal oxides, maintaining clean heat
transfer surfaces. Caustic corrosion is prevented by
maintaining a phosphate buffer with coordinated
control.

OptiSperse HP54674 fights the problem on two
fronts. First, its exclusive polymer controls metal
oxide deposits. Second, its built-in phosphate buffer

Americas

Watertown, MA
[phone]

Find a contact near you by
visiting www.gewater.com or
e-mailing [e-mail].

©2007, General Electric Company. All rights reserved.
* Trademark of General Electric Company; may be registered in one or more countries.

Global Headquarters

Trevose, PA
[phone]

Europe/Middle East/Africa

Heverlee, Belgium
[phone]

AM-FSbOptiSperseHP54674_EN.doc Dec-07

Asia/Pacific

Shanghai, China
[phone]

Treatment and Feeding Requirements

Feed Point - Boiler steam drum via separate chemi-

cal feedline.

Feedrate - Sufficient OptiSperse HP54674 should be
fed to maintain the recommended boiler phosphate
residual. Feedrates depend upon operating pres­sure, heat transfer rate, feedwater quality, and type
of fuel burned.

Dilution - Use good quality condensate, demineral­ized water, or deaerated boiler feedwater to make a
convenient feeding strength. The material may be
fed neat (dilution slip stream recommended) or di­luted in any proportion. If diluted, mild agitation
should be provided.

Equipment - OptiSperse HP54674 can be fed using
polyolefin tanks with stainless steel piping, pump
internals, fittings, and shut-off valves. Relief valves,
agitator shaft and propeller should be stainless
steel. Consult your GE representative for specific
information.

General Properties

Physical properties of OptiSperse HP54674 are
shown on the Material Safety Data Sheet, a copy of
which is available on request.

Packaging Information

OptiSperse HP54674 is a liquid blend, available in a
variety of containers and delivery methods. Contact
your GE representative for details.

Safety Precautions

A Material Safety Data Sheet containing detailed
information about this product is available upon
request.

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