OnGuard™ 2-plus Control System

The OnGuard 2-plus control system provides real-time data about your commercial and industrial cooling water systems, enabling you to continuously optimize processes. The OnGuard 2-plus control system monitors actual system corrosion rates and fouling factor, as well as other water parameters such as pH, conductivity, temperature oxidation-reduction potential and water flow.

When coupled with an OnGuard controller, the corrosion and fouling information enables performance-based control of the treatment chemistry. As a result, corrective actions occur constantly to ensure corrosion control and consistent, reliable cooling water operation.

Plants that use the OnGuard 2-plus control system enjoy key benefits including:

  • Precise fouling and corrosion control
  • Reduced water consumption
  • Reduced energy use
  • Prolonged asset life
  • Improved productivity

The control system is useful for a variety of industries, including oil and gaspower generation and chemical processing.

How It Works

The OnGuard 2-plus control system is the culmination of three decades of research, development and proven success in some of the world's most demanding environments. It’s the only control system approved by the National Association of Corrosion Engineers (NACE) and the only technology that provides an accurate indication of fouling in real time.

The system brings together sensors, meters and proprietary software to measure corrosion, scaling and fouling directly. At the heart of the control system is a heat-exchanger simulator—completely unique in the industry—that duplicates the thermodynamic and hydraulic properties directly related to fouling.

The system samples a side stream of cooling water. Using proprietary algorithms designed and developed by Solenis researchers, it then calculates fouling parameters. The sensitivity of the patented simulator enables detection of problems before they become evident on plant instrumentation.

Recorded Benefits

The OnGuard 2-plus control system is proven to provide customer benefits in a variety of industries and applications. In one case study, a power plant was experiencing high levels of fouling. This led to system inefficiencies and significant downtime for cleaning. With the help of the OnGuard 2-plus control system, the plant was able to optimize processes to achieve the following benefits:

  • Reduced condenser fouling
  • Increased power production $300,000 per year
  • Reduced outages and maintenance associated with cleaning
  • Improved worker safety and environmental sustainability

Read the full case study here (PDF 421 KB). Or read about other customer successes in the oil and gas industry (PDF 119 KB) and the chemical processing industry (PDF 34 KB).

More Information

Watch our video to learn more about the OnGuard 2-plus control system or contact a Solenis expert for free advice on ways to improve the reliability of your cooling water system.