CorTrol IS1075
2Pages

Catalog excerpts

Fact Sheet CorTrol* OS7785 Oxygen Scavenger • Controls oxygen corrosion Provides superior metal conditioning for feedwater and condensate systems Improves boiler reliability Contains no hydrazine or derivatives of hydrazine (>1000 psig) [70 kg/cm2] applications where boiler water solids are a major concern. Contributes no inorganic solids to feedwater CorTrol OS7785 contributes no inorganic dissolved solids to the system, which may result in a reduction in boiler blowdown with corresponding energy savings. CorTrol* OS7785 is an aqueous blend of an organic oxygen scavenging compound and a neutralizing amine. This product is a rapid and highly effective oxygen scavenger, and does not contribute to inorganic boiler water solids. In addition, it is safer to handle than hydrazine. CorTrol OS7785 is designed for the control of corrosion caused by dissolved oxygen in makeup, condensate, and feedwater systems. It is not suitable for use where the steam directly contacts food per FDA 21 CFR 173.310 or USDA Section G6. It is approved for use where steam contacts paper or paperboard used in food packaging per FDA 21CFR176.170 and 176.180. Typical Applications Even with good deaerating heater operation, sufficient dissolved oxygen can remain in the feedwater to damage the boiler system. Even low levels of dissolved oxygen are critical to high-pressure (high temperature) systems. Oxygen in water produces pitting which is particularly severe because of its localized nature. Economizers and feedwater heaters are particularly susceptible to oxygen attack. While it can effectively be used in low-pressure boiler systems, CorTrol OS7785 was specially developed as an oxygen scavenger for higher pressure Comparison of CorTrol OS7785 and hydrazine for removing dissolved oxygen. The oxygen scavenging efficiency of CorTrol OS7785 is better than hydrazine (see Figure 1). Because it is such a strong reducing agent, CorTrol OS7785 has also demonstrated the ability to reduce certain forms of metallic oxides, thereby conditioning metal surfaces (see Figure 2). Because CorTrol OS7785 is an excellent oxygen scavenger and provides superior metal conditioning at typical condensate temperatures, the product is highly desirable for condensate system protection. Find a contact near you by visiting www.ge.com/water and clicking on “Contact Us”. * Trademark of General Electric Company; may be registered in one or more countries. ©2009, General Electric Company. All rights reserved. AM-FSbCorTrolOS7785_EN.doc Sep-09

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Treatment And Feeding Requirements Feed Point - CorTrol OS7785 should be fed continuously to the deaerator storage section or to the feedwater line. For condensate protection it can be fed diluted to the steam header or to condensate lines. Feedrate - Feed CorTrol OS7785 based on the boiler feedwater dissolved oxygen level. Feed continuously. CorTrol OS7785 promotes the reduction of iron from the red, nonmagnetic state (Fe2O3) to the black, magnetic state (Fe3O4). As a result, iron removal with an electromagnetic filter can increase from approximately 50 percent to over 95 percent. The use...

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