Fact Sheet OptiSperse* APFe Series Internal Treatment • Cost-effective control of iron & hardness deposits on boiler heat transfer surfaces • May be applied as an All-Polymer treatment program or Supplemental Dispersant • Unique HTP dispersant provides enhanced control of iron oxide deposition Reduces potential for boiler tube failures due to waterside deposits • • • Proprietary blend of specialized polymeric dispersants/solubilizing agents Easily tested product tracer for convenient feed rate control Description and Use OptiSperse APFe is a unique liquid blend of two specialized polymeric dispersants including blends with a boiler alkalinity builder. The two polymeric dispersants are the GE HTP and SCP polymers. The polymers in OptiSperse APFe are multifunctional, and prevent deposits through their ability to: 1. Form complex incoming feedwater contaminants such as calcium and magnesium keeping them soluble in the boiler water; 2. Distort crystal growth reducing the size of any particles that are formed; 3. Alter the surface charge of the suspended particles and the metal surfaces, reducing the particle-particle attraction and the attraction between particles and the boiler tube walls. This results in significantly reduced scale potential and cleaner heat transfer surfaces, especially during upsets in control or variations in feedwater hardness. As shown in Figure 1 below, the SCP polymer used for hardness control has no tendency for creating polymer-hardness fouling during periods of treatment underfeed. The HTP (“High-Temperature Polymer”) dispersant is a unique polyphosphonate that has proven in hundreds of successful applications in boilers operating up to 1800 psig to be one of industry’s most effective iron oxide dispersants. The GE SCP polymer (“Synthetic Carboxylated Polymer”) is a proven boiler dispersant and hardness complexing agent, and is highly effective in preventing hardness-based deposits, and in transporting calcium and magnesium contaminants through the boiler in soluble form. OptiSperse APFe is designed for application as an “All Polymer” internal treatment program to prevent the formation of metal oxide and hardnessbased deposits on internal boiler heat transfer surfaces. It may also be applied as a supplemental dispersant in combination with phosphate and chelant-based internal treatment programs. PAA = Polyacrylic acid; SCP = GE Synthetic Carboxylated Polymer Figure 1 Find a contact near you by visiting www.gewater.com and clicking on “Contact Us”. * Trademark of General Electric Company; may be registered in one or more countries. ©2014, General Electric Company. All rights reserved. AM-FSbOptiSperseAPFeSeries_EN.doc Sep-14 As shown in Figure 2, the GE HTP polymer provides superior iron deposit control versus commonly applied carboxylated HTP polymers that have been evaluated against by GE. It is important to note that the striking iron deposit control performance gap between HTP and standard polymers could not be overcome by increasing the dosage of the standard polymers. Even at multiples of three and four times the level of HTP, the standard polymers could not match performance on iron of HTP. Dilution - OptiSperse APFe may be fed neat or diluted to any convenient strength with good quality condensate, demineralized water, or feedwater. Equipment - Chemical feed should be through a 304 or 316 stainless steel injection nozzle. General Properties Physical properties of liquid OptiSperse APFe are shown on the Material Safety Data Sheet, a copy of which is available on request. Packaging Information OptiSperse APFe is available in a wide variety of customized containers and delivery methods. Contact your GE Water & Process Technologies representative for details. Safety Precautions A Material Safety Data Sheet containing detailed in-formation about this product is available upon request. Figure 2 Treatment and Feeding Requirements Feed Point - In systems with high-purity feedwater (reverse osmosis or demineralized-quality make-up), the recommended feed point for OptiSperse APFe is directly into the boiler. In softened water systems, it is recommended that the product be fed to the boiler feedwater downstream of the boiler feed pumps. Feed Rate - Proper treatment levels for OptiSperse APFe depend on many factors specific to a given installation. The product should be used in accordance with the control procedures that GE establishes for a specific application. Page 2 Fact Sheet